dtach-0.8/0000755000175000017500000000000010750261732012307 5ustar criglercriglerdtach-0.8/README0000644000175000017500000001732310750261732013175 0ustar criglercrigler1. INTRODUCTION dtach is a program written in C that emulates the detach feature of screen, which allows a program to be executed in an environment that is protected from the controlling terminal. For instance, the program under the control of dtach would not be affected by the terminal being disconnected for some reason. dtach was written because screen did not adequately meet my needs; I did not need screen's extra features, such as support for multiple terminals or terminal emulation support. screen was also too big, bulky, and had source code that was difficult to understand. screen also interfered with my use of full-screen applications such as emacs and ircII, due to its excessive interpretation of the stream between the program and the attached terminals. dtach does not have a terminal emulation layer, and passes the raw output stream of the program to the attached terminals. The only input processing that dtach does perform is scanning for the detach character (which signals dtach to detach from the program) and processing the suspend key (which tells dtach to temporarily suspend itself without affecting the running program), and both of these can both be disabled if desired. Contrary to screen, dtach has minimal features, and is extremely tiny. This allows dtach to be more easily audited for bugs and security holes, and makes it accessible in environments where space is limited, such as on rescue disks. dtach has only been tested on the Linux/x86 platform, however it should be easily portable to other variants of Unix. It currently assumes that the host system uses POSIX termios, and has a working forkpty function available. 2. QUICK START Compiling dtach should be simple, as it uses autoconf: $ ./configure $ make If all goes well, a dtach binary should be built for your system. You can then copy it to the appropriate place on your system. dtach uses Unix-domain sockets to represent sessions; these are network sockets that are stored in the filesystem. You specify the name of the socket that dtach should use when creating or attaching to dtach sessions. For example, let's create a new session that is running ircII. We will use /tmp/foozle as the session's socket: $ dtach -A /tmp/foozle irc RuneB irc.freenode.net Here, -A tells dtach to either create a new session or attach to the existing session. If the session at /tmp/foozle does not exist yet, the program will be executed. If it does exist, then dtach will attach to the existing session. dtach has another attach mode, which is specified by using -a. The -a mode attaches to an already existing session, but will not create a new session. Each attaching process can have a separate detach character, suspend behavior, and redraw method, which are explained in the following sections. dtach is able to attach to the same session multiple times, though you will likely encounter problems if your terminals have different window sizes. Pressing ^L (Ctrl-L) will reset the window size of the program to match the current terminal. 3. DETACHING FROM THE SESSION By default, dtach scans the keyboard input looking for the detach character. When the detach character is pressed, dtach will detach from the current session and exit, leaving the program running in the background. You can then re-attach to the program by running dtach again with -A or -a. The default detach character is ^\ (Ctrl-\). This can be changed by supplying the -e option to dtach when attaching. For example: $ dtach -a /tmp/foozle -e '^A' That command would attach to the existing session at /tmp/foozle and use ^A (Ctrl-A) as the detach character, instead of the default ^\. You can disable processing of the detach character by supplying the -E option to dtach when attaching. 4. SUSPENDING DTACH By default, dtach also processes the suspend key (^Z or Ctrl-Z) itself, instead of passing it to the program. Thus, pressing suspend only suspends the attaching process, instead of the running program. This can be very useful for applications such as ircII, where you may not necessarily want the program to be suspended. Processing of the suspend key can be disabled by supplying the -z option to dtach when attaching. 5. REDRAW METHOD When attaching, dtach can use one of three methods to redraw the screen (none, ctrl_l, or winch). By default, dtach uses the ctrl_l method, which simply sends a ^L (Ctrl-L) character to the program if the terminal is in character-at-a-time and no-echo mode. The winch method forces a WINCH signal to be sent to the program, and the none method disables redrawing completely. For example, this command tells dtach to attach to a session at /tmp/foozle and use the winch redraw method: $ dtach -a /tmp/foozle -r winch When creating a new session (with the -c or -A modes), the specified method is used as the default redraw method for the session. 6. CHANGES The changes in version 0.8 are: - When using dtach -A or dtach -c, the master will now wait until the client attaches before trying to read from the program being executed. This avoids a race condition when the program prints something and exits before the client can attach itself. - Instead of exiting quietly, dtach will now report any errors that occur while trying to execute the program. - dtach -n can now be used without a terminal. - dtach -A will now try to detect and remove stale sockets. - Removed a Linux-specific escape sequence from the code that restores the original terminal settings. - Changed dtach.1 to use \- for the dashes in command line options, and fix an ambiguous backslash. - Use non-blocking mode in the master process, and avoid data loss by ensuring that at least one attaching client succesfully completes a write. - Fix -e ^ to work with lowercase characters. The changes in version 0.7 are: - The redraw method can now be explicitly specified on the command line (either no redraw at all, the old ^L character method, and the new WINCH signal method), since many programs only handle one or the other properly. - Changed the default redraw method back to the old ^L character method. - Changed the attach code to check the return value of select more carefully. - Changed the SIGWINCH handler to reinstall itself, to handle systems that always reset the handler. - Added more proper process group handling. The changes in version 0.6 are: - Redraws are now handled by sending the child process a WINCH signal instead of by sending a ^L character. This should help prevent line-oriented programs (such as bash) from clearing the screen excessively. - Flow control is now disabled when setting raw mode on the terminal. - Switched to using select instead of poll. - Changed some exits to exit succesfully instead of non-sucessfully. - Updated my email address. - Updated to Autoconf 2.59, renaming some files in the process. The changes in version 0.5 are: - Fix fd leakage. - Prevent atexit from being called twice on dtach -A. The changes in version 0.4 are: - Slightly improved README and dtach.1 - Portability updates thanks to sourceforge's compile farm. dtach should now work on: FreeBSD, Debian/alpha, Debian/sparc, Debian/PPC, and Solaris. The changes in version 0.3 are: - Fixed a typo in dtach.1 - Changed the attach code so that it tells the master when a suspend occurs. - Decreased the client <-> master packet size. - Changed the master to send a stream of text to attaching clients instead of sending a huge packet all the time. - Use getrlimit and dynamically allocate the data structures, if possible. - Added some more autoconf checks. - Initial sourceforge release. 7. AUTHOR dtach is (C)Copyright 2004-2008 Ned T. Crigler, and is under the GNU General Public License. Comments and suggestions about dtach are welcome, and can be sent to the author at: . dtach-0.8/COPYING0000644000175000017500000004311010750261732013341 0ustar criglercrigler GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. 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If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. 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It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. dtach-0.8/Makefile.in0000644000175000017500000000167110750261732014361 0ustar criglercriglersrcdir = @srcdir@ CC = @CC@ CFLAGS = @CFLAGS@ -I. LDFLAGS = @LDFLAGS@ LIBS = @LIBS@ VERSION = @PACKAGE_VERSION@ VPATH = $(srcdir) OBJ = attach.o master.o main.o SRC = $(srcdir)/attach.c $(srcdir)/master.c $(srcdir)/main.c TARFILES = $(srcdir)/README $(srcdir)/COPYING $(srcdir)/Makefile.in \ $(srcdir)/config.h.in $(SRC) \ $(srcdir)/dtach.h $(srcdir)/dtach.spec $(srcdir)/configure \ $(srcdir)/configure.ac $(srcdir)/dtach.1 dtach: $(OBJ) $(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBS) clean: rm -f dtach $(OBJ) dtach-$(VERSION).tar.gz distclean: clean rm -f config.h Makefile config.log config.status config.cache tar: mkdir dtach-$(VERSION) cp $(TARFILES) dtach-$(VERSION) tar -cf dtach-$(VERSION).tar dtach-$(VERSION)/ gzip -9f dtach-$(VERSION).tar rm -rf dtach-$(VERSION) attach.o: @srcdir@/attach.c @srcdir@/dtach.h config.h master.o: @srcdir@/master.c @srcdir@/dtach.h config.h main.o: @srcdir@/main.c @srcdir@/dtach.h config.h dtach-0.8/config.h.in0000644000175000017500000000667110750261732014344 0ustar criglercrigler/* config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `atexit' function. */ #undef HAVE_ATEXIT /* Define to 1 if you have the `dup2' function. */ #undef HAVE_DUP2 /* Define to 1 if you have the header file. */ #undef HAVE_FCNTL_H /* Define to 1 if you have the `forkpty' function. */ #undef HAVE_FORKPTY /* Define to 1 if you have the `grantpt' function. */ #undef HAVE_GRANTPT /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the `socket' library (-lsocket). */ #undef HAVE_LIBSOCKET /* Define to 1 if you have the `util' library (-lutil). */ #undef HAVE_LIBUTIL /* Define to 1 if you have the header file. */ #undef HAVE_LIBUTIL_H /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `memset' function. */ #undef HAVE_MEMSET /* Define to 1 if you have the `openpty' function. */ #undef HAVE_OPENPTY /* Define to 1 if you have the `ptsname' function. */ #undef HAVE_PTSNAME /* Define to 1 if you have the header file. */ #undef HAVE_PTY_H /* Define to 1 if you have the `select' function. */ #undef HAVE_SELECT /* Define to 1 if you have the `socket' function. */ #undef HAVE_SOCKET /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strerror' function. */ #undef HAVE_STRERROR /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the header file. */ #undef HAVE_STROPTS_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_IOCTL_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_RESOURCE_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SELECT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SOCKET_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TIME_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_TERMIOS_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Define to 1 if you have the `unlockpt' function. */ #undef HAVE_UNLOCKPT /* Define to 1 if you have the header file. */ #undef HAVE_UTIL_H /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define as the return type of signal handlers (`int' or `void'). */ #undef RETSIGTYPE /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Define to 1 if you can safely include both and . */ #undef TIME_WITH_SYS_TIME /* Define to empty if `const' does not conform to ANSI C. */ #undef const /* Define to `int' if does not define. */ #undef pid_t dtach-0.8/attach.c0000644000175000017500000001351310750261732013722 0ustar criglercrigler/* dtach - A simple program that emulates the detach feature of screen. Copyright (C) 2004-2008 Ned T. Crigler This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "dtach.h" #ifndef VDISABLE #ifdef _POSIX_VDISABLE #define VDISABLE _POSIX_VDISABLE #else #define VDISABLE 0377 #endif #endif /* ** The current terminal settings. After coming back from a suspend, we ** restore this. */ static struct termios cur_term; /* 1 if the window size changed */ static int win_changed; /* Restores the original terminal settings. */ static void restore_term(void) { tcsetattr(0, TCSADRAIN, &orig_term); /* Make cursor visible. Assumes VT100. */ printf("\033[?25h"); fflush(stdout); } /* Connects to a unix domain socket */ static int connect_socket(char *name) { int s; struct sockaddr_un sockun; s = socket(PF_UNIX, SOCK_STREAM, 0); if (s < 0) return -1; sockun.sun_family = AF_UNIX; strcpy(sockun.sun_path, name); if (connect(s, (struct sockaddr*)&sockun, sizeof(sockun)) < 0) { close(s); /* ECONNREFUSED is also returned for regular files, so make ** sure we are trying to connect to a socket. */ if (errno == ECONNREFUSED) { struct stat st; if (stat(name, &st) < 0) return -1; else if (!S_ISSOCK(st.st_mode) || S_ISREG(st.st_mode)) errno = ENOTSOCK; } return -1; } return s; } /* Signal */ static RETSIGTYPE die(int sig) { /* Print a nice pretty message for some things. */ if (sig == SIGHUP || sig == SIGINT) printf(EOS "\r\n[detached]\r\n"); else printf(EOS "\r\n[got signal %d - dying]\r\n", sig); exit(1); } /* Window size change. */ static RETSIGTYPE win_change() { signal(SIGWINCH, win_change); win_changed = 1; } /* Handles input from the keyboard. */ static void process_kbd(int s, struct packet *pkt) { /* Suspend? */ if (!no_suspend && (pkt->u.buf[0] == cur_term.c_cc[VSUSP])) { /* Tell the master that we are suspending. */ pkt->type = MSG_DETACH; write(s, pkt, sizeof(struct packet)); /* And suspend... */ tcsetattr(0, TCSADRAIN, &orig_term); printf(EOS "\r\n"); kill(getpid(), SIGTSTP); tcsetattr(0, TCSADRAIN, &cur_term); /* Tell the master that we are returning. */ pkt->type = MSG_ATTACH; write(s, pkt, sizeof(struct packet)); /* We would like a redraw, too. */ pkt->type = MSG_REDRAW; pkt->len = redraw_method; ioctl(0, TIOCGWINSZ, &pkt->u.ws); write(s, pkt, sizeof(struct packet)); return; } /* Detach char? */ else if (pkt->u.buf[0] == detach_char) { printf(EOS "\r\n[detached]\r\n"); exit(0); } /* Just in case something pukes out. */ else if (pkt->u.buf[0] == '\f') win_changed = 1; /* Push it out */ write(s, pkt, sizeof(struct packet)); } int attach_main(int noerror) { struct packet pkt; unsigned char buf[BUFSIZE]; fd_set readfds; int s; /* Attempt to open the socket. Don't display an error if noerror is ** set. */ s = connect_socket(sockname); if (s < 0) { if (!noerror) printf("%s: %s: %s\n", progname, sockname, strerror(errno)); return 1; } /* The current terminal settings are equal to the original terminal ** settings at this point. */ cur_term = orig_term; /* Set a trap to restore the terminal when we die. */ atexit(restore_term); /* Set some signals. */ signal(SIGPIPE, SIG_IGN); signal(SIGXFSZ, SIG_IGN); signal(SIGHUP, die); signal(SIGTERM, die); signal(SIGINT, die); signal(SIGQUIT, die); signal(SIGWINCH, win_change); /* Set raw mode. */ cur_term.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL); cur_term.c_iflag &= ~(IXON|IXOFF); cur_term.c_oflag &= ~(OPOST); cur_term.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); cur_term.c_cflag &= ~(CSIZE|PARENB); cur_term.c_cflag |= CS8; cur_term.c_cc[VLNEXT] = VDISABLE; cur_term.c_cc[VMIN] = 1; cur_term.c_cc[VTIME] = 0; tcsetattr(0, TCSADRAIN, &cur_term); /* Clear the screen. This assumes VT100. */ write(1, "\33[H\33[J", 6); /* Tell the master that we want to attach. */ pkt.type = MSG_ATTACH; write(s, &pkt, sizeof(struct packet)); /* We would like a redraw, too. */ pkt.type = MSG_REDRAW; pkt.len = redraw_method; ioctl(0, TIOCGWINSZ, &pkt.u.ws); write(s, &pkt, sizeof(struct packet)); /* Wait for things to happen */ while (1) { int n; FD_ZERO(&readfds); FD_SET(0, &readfds); FD_SET(s, &readfds); n = select(s + 1, &readfds, NULL, NULL, NULL); if (n < 0 && errno != EINTR && errno != EAGAIN) { printf(EOS "\r\n[select failed]\r\n"); exit(1); } /* Pty activity */ if (n > 0 && FD_ISSET(s, &readfds)) { int len = read(s, buf, sizeof(buf)); if (len == 0) { printf(EOS "\r\n[EOF - dtach terminating]" "\r\n"); exit(0); } else if (len < 0) { printf(EOS "\r\n[read returned an error]\r\n"); exit(1); } /* Send the data to the terminal. */ write(1, buf, len); n--; } /* stdin activity */ if (n > 0 && FD_ISSET(0, &readfds)) { pkt.type = MSG_PUSH; memset(pkt.u.buf, 0, sizeof(pkt.u.buf)); pkt.len = read(0, pkt.u.buf, sizeof(pkt.u.buf)); if (pkt.len <= 0) exit(1); process_kbd(s, &pkt); n--; } /* Window size changed? */ if (win_changed) { win_changed = 0; pkt.type = MSG_WINCH; ioctl(0, TIOCGWINSZ, &pkt.u.ws); write(s, &pkt, sizeof(pkt)); } } return 0; } dtach-0.8/master.c0000644000175000017500000003353610750261732013760 0ustar criglercrigler/* dtach - A simple program that emulates the detach feature of screen. Copyright (C) 2004-2008 Ned T. Crigler This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "dtach.h" /* The pty struct - The pty information is stored here. */ struct pty { /* File descriptor of the pty */ int fd; #ifdef BROKEN_MASTER /* File descriptor of the slave side of the pty. For broken systems. */ int slave; #endif /* Process id of the child. */ pid_t pid; /* The terminal parameters of the pty. Old and new for comparision ** purposes. */ struct termios term; /* The current window size of the pty. */ struct winsize ws; }; /* A connected client */ struct client { /* The next client in the linked list. */ struct client *next; /* The previous client in the linked list. */ struct client **pprev; /* File descriptor of the client. */ int fd; /* Whether or not the client is attached. */ int attached; }; /* The list of connected clients. */ static struct client *clients; /* The pseudo-terminal created for the child process. */ static struct pty the_pty; #ifndef HAVE_FORKPTY pid_t forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp); #endif /* Unlink the socket */ static void unlink_socket(void) { unlink(sockname); } /* Signal */ static RETSIGTYPE die(int sig) { /* Well, the child died. */ if (sig == SIGCHLD) { #ifdef BROKEN_MASTER /* Damn you Solaris! */ close(the_pty.fd); #endif return; } exit(1); } /* Sets a file descriptor to non-blocking mode. */ static int setnonblocking(int fd) { int flags; #if defined(O_NONBLOCK) flags = fcntl(fd, F_GETFL); if (flags < 0 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) return -1; return 0; #elif defined(FIONBIO) flags = 1; if (ioctl(fd, FIONBIO, &flags) < 0) return -1; return 0; #else #warning Do not know how to set non-blocking mode. return 0; #endif } /* Initialize the pty structure. */ static int init_pty(char **argv, int statusfd) { /* Use the original terminal's settings. We don't have to set the ** window size here, because the attacher will send it in a packet. */ the_pty.term = orig_term; memset(&the_pty.ws, 0, sizeof(struct winsize)); /* Create the pty process */ if (!dont_have_tty) the_pty.pid = forkpty(&the_pty.fd, NULL, &the_pty.term, NULL); else the_pty.pid = forkpty(&the_pty.fd, NULL, NULL, NULL); if (the_pty.pid < 0) return -1; else if (the_pty.pid == 0) { /* Child.. Execute the program. */ execvp(*argv, argv); /* Report the error to statusfd if we can, or stdout if we ** can't. */ if (statusfd != -1) dup2(statusfd, 1); else printf(EOS "\r\n"); printf("%s: could not execute %s: %s\r\n", progname, *argv, strerror(errno)); fflush(stdout); _exit(127); } /* Parent.. Finish up and return */ #ifdef BROKEN_MASTER { char *buf; buf = ptsname(the_pty.fd); the_pty.slave = open(buf, O_RDWR|O_NOCTTY); } #endif return 0; } /* Send a signal to the slave side of a pseudo-terminal. */ static void killpty(struct pty *pty, int sig) { pid_t pgrp = -1; #ifdef TIOCSIGNAL if (ioctl(pty->fd, TIOCSIGNAL, sig) >= 0) return; #endif #ifdef TIOCSIG if (ioctl(pty->fd, TIOCSIG, sig) >= 0) return; #endif #ifdef TIOCGPGRP #ifdef BROKEN_MASTER if (ioctl(pty->slave, TIOCGPGRP, &pgrp) >= 0 && pgrp != -1 && kill(-pgrp, sig) >= 0) return; #endif if (ioctl(pty->fd, TIOCGPGRP, &pgrp) >= 0 && pgrp != -1 && kill(-pgrp, sig) >= 0) return; #endif /* Fallback using the child's pid. */ kill(-pty->pid, sig); } /* Creates a new unix domain socket. */ static int create_socket(char *name) { int s; struct sockaddr_un sockun; s = socket(PF_UNIX, SOCK_STREAM, 0); if (s < 0) return -1; sockun.sun_family = AF_UNIX; strcpy(sockun.sun_path, name); if (bind(s, (struct sockaddr*)&sockun, sizeof(sockun)) < 0) { close(s); return -1; } if (listen(s, 128) < 0) { close(s); return -1; } if (setnonblocking(s) < 0) { close(s); return -1; } /* chmod it to prevent any suprises */ if (chmod(name, 0600) < 0) { close(s); return -1; } return s; } /* Process activity on the pty - Input and terminal changes are sent out to ** the attached clients. If the pty goes away, we die. */ static void pty_activity(int s) { unsigned char buf[BUFSIZE]; int len; struct client *p; fd_set readfds, writefds; int highest_fd, nclients; /* Read the pty activity */ len = read(the_pty.fd, buf, sizeof(buf)); /* Error -> die */ if (len <= 0) exit(1); #ifdef BROKEN_MASTER /* Get the current terminal settings. */ if (tcgetattr(the_pty.slave, &the_pty.term) < 0) exit(1); #else /* Get the current terminal settings. */ if (tcgetattr(the_pty.fd, &the_pty.term) < 0) exit(1); #endif top: /* ** Wait until at least one client is writable. Also wait on the control ** socket in case a new client tries to connect. */ FD_ZERO(&readfds); FD_ZERO(&writefds); FD_SET(s, &readfds); highest_fd = s; for (p = clients, nclients = 0; p; p = p->next) { if (!p->attached) continue; FD_SET(p->fd, &writefds); if (p->fd > highest_fd) highest_fd = p->fd; nclients++; } if (nclients == 0) return; if (select(highest_fd + 1, &readfds, &writefds, NULL, NULL) < 0) return; /* Send the data out to the clients. */ for (p = clients, nclients = 0; p; p = p->next) { int written; if (!FD_ISSET(p->fd, &writefds)) continue; written = 0; while (written < len) { int n = write(p->fd, buf + written, len - written); if (n > 0) { written += n; continue; } else if (n < 0 && errno == EINTR) continue; else if (n < 0 && errno != EAGAIN) nclients = -1; break; } if (nclients != -1 && written == len) nclients++; } /* Try again if nothing happened. */ if (!FD_ISSET(s, &readfds) && nclients == 0) goto top; } /* Process activity on the control socket */ static void control_activity(int s) { int fd; struct client *p; /* Accept the new client and link it in. */ fd = accept(s, NULL, NULL); if (fd < 0) return; else if (setnonblocking(fd) < 0) { close(fd); return; } /* Link it in. */ p = malloc(sizeof(struct client)); p->fd = fd; p->attached = 0; p->pprev = &clients; p->next = *(p->pprev); if (p->next) p->next->pprev = &p->next; *(p->pprev) = p; } /* Process activity from a client. */ static void client_activity(struct client *p) { int len; struct packet pkt; /* Read the activity. */ len = read(p->fd, &pkt, sizeof(struct packet)); if (len < 0 && (errno == EAGAIN || errno == EINTR)) return; /* Close the client on an error. */ if (len <= 0) { close(p->fd); if (p->next) p->next->pprev = p->pprev; *(p->pprev) = p->next; free(p); return; } /* Push out data to the program. */ if (pkt.type == MSG_PUSH) write(the_pty.fd, pkt.u.buf, pkt.len); /* Attach or detach from the program. */ else if (pkt.type == MSG_ATTACH) p->attached = 1; else if (pkt.type == MSG_DETACH) p->attached = 0; /* Window size change request, without a forced redraw. */ else if (pkt.type == MSG_WINCH) { the_pty.ws = pkt.u.ws; ioctl(the_pty.fd, TIOCSWINSZ, &the_pty.ws); } /* Force a redraw using a particular method. */ else if (pkt.type == MSG_REDRAW) { int method = pkt.len; /* If the client didn't specify a particular method, use ** whatever we had on startup. */ if (method == REDRAW_UNSPEC) method = redraw_method; if (method == REDRAW_NONE) return; /* Set the window size. */ the_pty.ws = pkt.u.ws; ioctl(the_pty.fd, TIOCSWINSZ, &the_pty.ws); /* Send a ^L character if the terminal is in no-echo and ** character-at-a-time mode. */ if (method == REDRAW_CTRL_L) { char c = '\f'; if (((the_pty.term.c_lflag & (ECHO|ICANON)) == 0) && (the_pty.term.c_cc[VMIN] == 1)) { write(the_pty.fd, &c, 1); } } /* Send a WINCH signal to the program. */ else if (method == REDRAW_WINCH) { killpty(&the_pty, SIGWINCH); } } } /* The master process - It watches over the pty process and the attached */ /* clients. */ static void master_process(int s, char **argv, int waitattach, int statusfd) { struct client *p, *next; fd_set readfds; int highest_fd; int nullfd; /* Okay, disassociate ourselves from the original terminal, as we ** don't care what happens to it. */ setsid(); /* Set a trap to unlink the socket when we die. */ atexit(unlink_socket); /* Set up some signals. */ signal(SIGPIPE, SIG_IGN); signal(SIGXFSZ, SIG_IGN); signal(SIGHUP, SIG_IGN); signal(SIGTTIN, SIG_IGN); signal(SIGTTOU, SIG_IGN); signal(SIGINT, die); signal(SIGTERM, die); signal(SIGCHLD, die); /* Create a pty in which the process is running. */ if (init_pty(argv, statusfd) < 0) { if (statusfd != -1) dup2(statusfd, 1); printf("%s: init_pty: %s\n", progname, strerror(errno)); exit(1); } /* Close statusfd, since we don't need it anymore. */ if (statusfd != -1) close(statusfd); /* Make sure stdin/stdout/stderr point to /dev/null. We are now a ** daemon. */ nullfd = open("/dev/null", O_RDWR); dup2(nullfd, 0); dup2(nullfd, 1); dup2(nullfd, 2); if (nullfd > 2) close(nullfd); /* Loop forever. */ while (1) { /* Re-initialize the file descriptor set for select. */ FD_ZERO(&readfds); FD_SET(s, &readfds); highest_fd = s; /* ** When waitattach is set, wait until the client attaches ** before trying to read from the pty. */ if (waitattach) { if (clients && clients->attached) waitattach = 0; } else { FD_SET(the_pty.fd, &readfds); if (the_pty.fd > highest_fd) highest_fd = the_pty.fd; } for (p = clients; p; p = p->next) { FD_SET(p->fd, &readfds); if (p->fd > highest_fd) highest_fd = p->fd; } /* Wait for something to happen. */ if (select(highest_fd + 1, &readfds, NULL, NULL, NULL) < 0) { if (errno == EINTR || errno == EAGAIN) continue; exit(1); } /* New client? */ if (FD_ISSET(s, &readfds)) control_activity(s); /* Activity on a client? */ for (p = clients; p; p = next) { next = p->next; if (FD_ISSET(p->fd, &readfds)) client_activity(p); } /* pty activity? */ if (FD_ISSET(the_pty.fd, &readfds)) pty_activity(s); } } int master_main(char **argv, int waitattach) { int fd[2] = {-1, -1}; int s; pid_t pid; /* Use a default redraw method if one hasn't been specified yet. */ if (redraw_method == REDRAW_UNSPEC) redraw_method = REDRAW_CTRL_L; /* Create the unix domain socket. */ s = create_socket(sockname); if (s < 0) { printf("%s: %s: %s\n", progname, sockname, strerror(errno)); return 1; } #if defined(F_SETFD) && defined(FD_CLOEXEC) fcntl(s, F_SETFD, FD_CLOEXEC); /* If FD_CLOEXEC works, create a pipe and use it to report any errors ** that occur while trying to execute the program. */ if (pipe(fd) >= 0) { if (fcntl(fd[0], F_SETFD, FD_CLOEXEC) < 0 || fcntl(fd[1], F_SETFD, FD_CLOEXEC) < 0) { close(fd[0]); close(fd[1]); fd[0] = fd[1] = -1; } } #endif /* Fork off so we can daemonize and such */ pid = fork(); if (pid < 0) { printf("%s: fork: %s\n", progname, strerror(errno)); unlink_socket(); return 1; } else if (pid == 0) { /* Child - this becomes the master */ if (fd[0] != -1) close(fd[0]); master_process(s, argv, waitattach, fd[1]); return 0; } /* Parent - just return. */ #if defined(F_SETFD) && defined(FD_CLOEXEC) /* Check if an error occurred while trying to execute the program. */ if (fd[0] != -1) { char buf[1024]; int len; close(fd[1]); len = read(fd[0], buf, sizeof(buf)); if (len > 0) { write(2, buf, len); kill(pid, SIGTERM); return 1; } close(fd[0]); } #endif close(s); return 0; } /* BSDish functions for systems that don't have them. */ #ifndef HAVE_OPENPTY #define HAVE_OPENPTY /* openpty: Use /dev/ptmx and Unix98 if we have it. */ #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) int openpty(int *amaster, int *aslave, char *name, struct termios *termp, struct winsize *winp) { int master, slave; char *buf; master = open("/dev/ptmx", O_RDWR); if (master < 0) return -1; if (grantpt(master) < 0) return -1; if (unlockpt(master) < 0) return -1; buf = ptsname(master); if (!buf) return -1; slave = open(buf, O_RDWR|O_NOCTTY); if (slave < 0) return -1; #ifdef I_PUSH if (ioctl(slave, I_PUSH, "ptem") < 0) return -1; if (ioctl(slave, I_PUSH, "ldterm") < 0) return -1; #endif *amaster = master; *aslave = slave; if (name) strcpy(name, buf); if (termp) tcsetattr(slave, TCSAFLUSH, termp); if (winp) ioctl(slave, TIOCSWINSZ, winp); return 0; } #else #error Do not know how to define openpty. #endif #endif #ifndef HAVE_FORKPTY #if defined(HAVE_OPENPTY) pid_t forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp) { pid_t pid; int master, slave; if (openpty(&master, &slave, name, termp, winp) < 0) return -1; *amaster = master; /* Fork off... */ pid = fork(); if (pid < 0) return -1; else if (pid == 0) { char *buf; int fd; setsid(); #ifdef TIOCSCTTY buf = NULL; if (ioctl(slave, TIOCSCTTY, NULL) < 0) _exit(1); #else buf = ptsname(master); fd = open(buf, O_RDWR); close(fd); #endif dup2(slave, 0); dup2(slave, 1); dup2(slave, 2); if (slave > 2) close(slave); close(master); return 0; } else { close(slave); return pid; } } #else #error Do not know how to define forkpty. #endif #endif dtach-0.8/main.c0000644000175000017500000001504410750261732013403 0ustar criglercrigler/* dtach - A simple program that emulates the detach feature of screen. Copyright (C) 2004-2008 Ned T. Crigler This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "dtach.h" /* ** dtach is a quick hack, since I wanted the detach feature of screen without ** all the other crud. It'll work best with full-screen applications, as it ** does not keep track of the screen or anything like that. */ /* Make sure the binary has a copyright. */ const char copyright[] = "dtach - version " PACKAGE_VERSION "(C)Copyright 2004-2008 Ned T. Crigler"; /* argv[0] from the program */ char *progname; /* The name of the passed in socket. */ char *sockname; /* The character used for detaching. Defaults to '^\' */ int detach_char = '\\' - 64; /* 1 if we should not interpret the suspend character. */ int no_suspend; /* The default redraw method. Initially set to unspecified. */ int redraw_method = REDRAW_UNSPEC; /* ** The original terminal settings. Shared between the master and attach ** processes. The master uses it to initialize the pty, and the attacher uses ** it to restore the original settings. */ struct termios orig_term; int dont_have_tty; static void usage() { printf( "dtach - version %s, compiled on %s at %s.\n" "Usage: dtach -a \n" " dtach -A \n" " dtach -c \n" " dtach -n \n" "Modes:\n" " -a\t\tAttach to the specified socket.\n" " -A\t\tAttach to the specified socket, or create it if it\n" "\t\t does not exist, running the specified command.\n" " -c\t\tCreate a new socket and run the specified command.\n" " -n\t\tCreate a new socket and run the specified command " "detached.\n" "Options:\n" " -e \tSet the detach character to , defaults " "to ^\\.\n" " -E\t\tDisable the detach character.\n" " -r \tSet the redraw method to . The " "valid methods are:\n" "\t\t none: Don't redraw at all.\n" "\t\t ctrl_l: Send a Ctrl L character to the program.\n" "\t\t winch: Send a WINCH signal to the program.\n" " -z\t\tDisable processing of the suspend key.\n" "\nReport any bugs to <" PACKAGE_BUGREPORT ">.\n", PACKAGE_VERSION, __DATE__, __TIME__); exit(0); } int main(int argc, char **argv) { int mode = 0; /* Save the program name */ progname = argv[0]; ++argv; --argc; /* Parse the arguments */ if (argc >= 1 && **argv == '-') { if (strncmp(*argv, "--help", strlen(*argv)) == 0) usage(); else if (strncmp(*argv, "--version", strlen(*argv)) == 0) { printf("dtach - version %s, compiled on %s at %s.\n", PACKAGE_VERSION, __DATE__, __TIME__); return 0; } mode = argv[0][1]; if (mode == '?') usage(); else if (mode != 'a' && mode != 'c' && mode != 'n' && mode != 'A') { printf("%s: Invalid mode '-%c'\n", progname, mode); printf("Try '%s --help' for more information.\n", progname); return 1; } } if (!mode) { printf("%s: No mode was specified.\n", progname); printf("Try '%s --help' for more information.\n", progname); return 1; } ++argv; --argc; if (argc < 1) { printf("%s: No socket was specified.\n", progname); printf("Try '%s --help' for more information.\n", progname); return 1; } sockname = *argv; ++argv; --argc; while (argc >= 1 && **argv == '-') { char *p; for (p = argv[0] + 1; *p; ++p) { if (*p == 'E') detach_char = -1; else if (*p == 'z') no_suspend = 1; else if (*p == 'e') { ++argv; --argc; if (argc < 1) { printf("%s: No escape character " "specified.\n", progname); printf("Try '%s --help' for more " "information.\n", progname); return 1; } if (argv[0][0] == '^' && argv[0][1]) { if (argv[0][1] == '?') detach_char = '\177'; else detach_char = argv[0][1] & 037; } else detach_char = argv[0][0]; break; } else if (*p == 'r') { ++argv; --argc; if (argc < 1) { printf("%s: No redraw method " "specified.\n", progname); printf("Try '%s --help' for more " "information.\n", progname); return 1; } if (strcmp(argv[0], "none") == 0) redraw_method = REDRAW_NONE; else if (strcmp(argv[0], "ctrl_l") == 0) redraw_method = REDRAW_CTRL_L; else if (strcmp(argv[0], "winch") == 0) redraw_method = REDRAW_WINCH; else { printf("%s: Invalid redraw method " "specified.\n", progname); printf("Try '%s --help' for more " "information.\n", progname); return 1; } break; } else { printf("%s: Invalid option '-%c'\n", progname, *p); printf("Try '%s --help' for more information.\n", progname); return 1; } } ++argv; --argc; } if (mode != 'a' && argc < 1) { printf("%s: No command was specified.\n", progname); printf("Try '%s --help' for more information.\n", progname); return 1; } /* Save the original terminal settings. */ if (tcgetattr(0, &orig_term) < 0) { memset(&orig_term, 0, sizeof(struct termios)); dont_have_tty = 1; } if (dont_have_tty && mode != 'n') { printf("%s: Attaching to a session requires a terminal.\n", progname); return 1; } if (mode == 'a') { if (argc > 0) { printf("%s: Invalid number of arguments.\n", progname); printf("Try '%s --help' for more information.\n", progname); return 1; } return attach_main(0); } else if (mode == 'n') return master_main(argv, 0); else if (mode == 'c') { if (master_main(argv, 1) != 0) return 1; return attach_main(0); } else if (mode == 'A') { /* Try to attach first. If that doesn't work, create a new ** socket. */ if (attach_main(1) != 0) { if (errno == ECONNREFUSED || errno == ENOENT) { if (errno == ECONNREFUSED) unlink(sockname); if (master_main(argv, 1) != 0) return 1; } return attach_main(0); } } return 0; } dtach-0.8/dtach.h0000644000175000017500000000546010750261732013550 0ustar criglercrigler/* dtach - A simple program that emulates the detach feature of screen. Copyright (C) 2001, 2004-2008 Ned T. Crigler This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef dtach_h #define dtach_h #include #include #include #include #include #include #include #if TIME_WITH_SYS_TIME #include #include #else #if HAVE_SYS_TIME_H #include #else #include #endif #endif #ifdef HAVE_PTY_H #include #endif #ifdef HAVE_UTIL_H #include #endif #ifdef HAVE_LIBUTIL_H #include #endif #ifdef HAVE_STROPTS_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_SYS_RESOURCE_H #include #endif #include #include #include #include #include #ifndef S_ISREG #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) #endif #ifndef S_ISSOCK #define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) #endif extern char *progname, *sockname; extern int detach_char, no_suspend, redraw_method; extern struct termios orig_term; extern int dont_have_tty; enum { MSG_PUSH = 0, MSG_ATTACH = 1, MSG_DETACH = 2, MSG_WINCH = 3, MSG_REDRAW = 4, }; enum { REDRAW_UNSPEC = 0, REDRAW_NONE = 1, REDRAW_CTRL_L = 2, REDRAW_WINCH = 3, }; /* The client to master protocol. */ struct packet { unsigned char type; unsigned char len; union { unsigned char buf[sizeof(struct winsize)]; struct winsize ws; } u; }; /* ** The master sends a simple stream of text to the attaching clients, without ** any protocol. This might change back to the packet based protocol in the ** future. In the meantime, however, we minimize the amount of data sent back ** and forth between the client and the master. BUFSIZE is the size of the ** buffer used for the text stream. */ #define BUFSIZE 4096 /* This hopefully moves to the bottom of the screen */ #define EOS "\033[999H" int attach_main(int noerror); int master_main(char **argv, int waitattach); #ifdef sun #define BROKEN_MASTER #endif #endif dtach-0.8/dtach.spec0000644000175000017500000000666610750261732014264 0ustar criglercriglerSummary: A simple program that emulates the detach feature of screen. Name: dtach Version: 0.8 Release: 1 License: GPL URL: http://dtach.sourceforge.net Group: Applications/System Source: http://prdownloads.sourceforge.net/dtach/dtach-%{version}.tar.gz Buildroot: %{_tmppath}/%{name}-%{version}-root %description dtach is a program that emulates the detach feature of screen, with less overhead. It is designed to be transparent and un-intrusive; it avoids interpreting the input and output between attached terminals and the program under its control. Consequently, it works best with full-screen applications such as emacs. %prep %setup %build %configure make %install rm -rf $RPM_BUILD_ROOT/* mkdir -p $RPM_BUILD_ROOT/%{_bindir} mkdir -p $RPM_BUILD_ROOT/usr/share/doc/dtach-%{version} mkdir -p $RPM_BUILD_ROOT/%{_mandir}/man1 install -m 755 dtach $RPM_BUILD_ROOT/%{_bindir}/dtach install -m 644 dtach.1 $RPM_BUILD_ROOT/%{_mandir}/man1/dtach.1 %clean make clean rm -rf $RPM_BUILD_ROOT rm -rf $RPM_BUILD_DIR/%{name}-%{version} %files %defattr(-,root,root,-) %doc COPYING README %{_bindir}/dtach %{_mandir}/*/* %changelog * Wed Jan 30 2008 Ned T. Crigler 0.8 - New release * Sat Jul 3 2004 Ned T. Crigler 0.7 - New release * Fri Nov 30 2001 Ned T. Crigler 0.5 - Fix fd leakage. - Prevent atexit from being called twice on dtach -A. * Fri Nov 30 2001 Trond Eivind Glomsrød 0.4-1 - s/Copyright/License/ - Minor description change - fix use of %%doc - Add full location of source tarball * Sat Nov 03 2001 Ned T. Crigler 0.4 - Portability updates thanks to sourceforge's compile farm. dtach should now work on: FreeBSD, Debian/alpha, Debian/PPC, Debian/sparc, Debian/PPC, and Solaris. * Thu Sep 27 2001 Ned T. Crigler - Modified spec file URL: to point to http://dtach.sourceforge.net * Wed Sep 26 2001 Ned T. Crigler 0.3 - Use getrlimit and dynamically allocate the data structures, if possible. - Added some more autoconf checks. - Initial sourceforge release. * Thu Sep 20 2001 Ned T. Crigler - Changed the master to send a stream of text to attaching clients instead of sending a huge packet all the time. - Decreased the client <-> master packet size. - Changed the attach code so that it tells the master when a suspend occurs. * Tue Sep 18 2001 Ned T. Crigler - Fixed a typo in dtach.1 * Tue Sep 18 2001 Ned T. Crigler 0.2 - Removed silly thinko regarding terminal settings in attach, we always set the terminal to raw mode now. - Moved redraw code into the master, which tries to be smarter when using ^L. - Moved the code that obtains the current terminal settings into main, preventing a race condition between the master and attach processes. - Rewrote argument parsing code. - Changed name to dtach. - Added a man page. * Mon Sep 17 2001 Ned T. Crigler - Changed fchmod to chmod in create_socket. * Mon Sep 17 2001 Isaiah Weiner - Modified spec file to correct detach binary permissions - Modified spec file to correct detach documentation path - Modified spec file URL: to point to http://people.redhat.com/iweiner/detach - Modified spec file %clean to remove buildroot and builddir. * Mon Sep 17 2001 Ned T. 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Now check whether nonexistent headers # can be detected and how. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then # Broken: success on invalid input. continue else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Passes both tests. ac_preproc_ok=: break fi rm -f conftest.err conftest.$ac_ext done # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. rm -f conftest.err conftest.$ac_ext if $ac_preproc_ok; then break fi done ac_cv_prog_CPP=$CPP fi CPP=$ac_cv_prog_CPP else ac_cv_prog_CPP=$CPP fi { echo "$as_me:$LINENO: result: $CPP" >&5 echo "${ECHO_T}$CPP" >&6; } ac_preproc_ok=false for ac_c_preproc_warn_flag in '' yes do # Use a header file that comes with gcc, so configuring glibc # with a fresh cross-compiler works. # Prefer to if __STDC__ is defined, since # exists even on freestanding compilers. # On the NeXT, cc -E runs the code through the compiler's parser, # not just through cpp. "Syntax error" is here to catch this case. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #ifdef __STDC__ # include #else # include #endif Syntax error _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then : else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Broken: fails on valid input. continue fi rm -f conftest.err conftest.$ac_ext # OK, works on sane cases. Now check whether nonexistent headers # can be detected and how. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then # Broken: success on invalid input. continue else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Passes both tests. ac_preproc_ok=: break fi rm -f conftest.err conftest.$ac_ext done # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. rm -f conftest.err conftest.$ac_ext if $ac_preproc_ok; then : else { { echo "$as_me:$LINENO: error: C preprocessor \"$CPP\" fails sanity check See \`config.log' for more details." >&5 echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check See \`config.log' for more details." >&2;} { (exit 1); exit 1; }; } fi ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu { echo "$as_me:$LINENO: checking for grep that handles long lines and -e" >&5 echo $ECHO_N "checking for grep that handles long lines and -e... $ECHO_C" >&6; } if test "${ac_cv_path_GREP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else # Extract the first word of "grep ggrep" to use in msg output if test -z "$GREP"; then set dummy grep ggrep; ac_prog_name=$2 if test "${ac_cv_path_GREP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_path_GREP_found=false # Loop through the user's path and test for each of PROGNAME-LIST as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_prog in grep ggrep; do for ac_exec_ext in '' $ac_executable_extensions; do ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext" { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue # Check for GNU ac_path_GREP and select it if it is found. # Check for GNU $ac_path_GREP case `"$ac_path_GREP" --version 2>&1` in *GNU*) ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;; *) ac_count=0 echo $ECHO_N "0123456789$ECHO_C" >"conftest.in" while : do cat "conftest.in" "conftest.in" >"conftest.tmp" mv "conftest.tmp" "conftest.in" cp "conftest.in" "conftest.nl" echo 'GREP' >> "conftest.nl" "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break ac_count=`expr $ac_count + 1` if test $ac_count -gt ${ac_path_GREP_max-0}; then # Best one so far, save it but keep looking for a better one ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_max=$ac_count fi # 10*(2^10) chars as input seems more than enough test $ac_count -gt 10 && break done rm -f conftest.in conftest.tmp conftest.nl conftest.out;; esac $ac_path_GREP_found && break 3 done done done IFS=$as_save_IFS fi GREP="$ac_cv_path_GREP" if test -z "$GREP"; then { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5 echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;} { (exit 1); exit 1; }; } fi else ac_cv_path_GREP=$GREP fi fi { echo "$as_me:$LINENO: result: $ac_cv_path_GREP" >&5 echo "${ECHO_T}$ac_cv_path_GREP" >&6; } GREP="$ac_cv_path_GREP" { echo "$as_me:$LINENO: checking for egrep" >&5 echo $ECHO_N "checking for egrep... $ECHO_C" >&6; } if test "${ac_cv_path_EGREP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if echo a | $GREP -E '(a|b)' >/dev/null 2>&1 then ac_cv_path_EGREP="$GREP -E" else # Extract the first word of "egrep" to use in msg output if test -z "$EGREP"; then set dummy egrep; ac_prog_name=$2 if test "${ac_cv_path_EGREP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_path_EGREP_found=false # Loop through the user's path and test for each of PROGNAME-LIST as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_prog in egrep; do for ac_exec_ext in '' $ac_executable_extensions; do ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext" { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue # Check for GNU ac_path_EGREP and select it if it is found. # Check for GNU $ac_path_EGREP case `"$ac_path_EGREP" --version 2>&1` in *GNU*) ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;; *) ac_count=0 echo $ECHO_N "0123456789$ECHO_C" >"conftest.in" while : do cat "conftest.in" "conftest.in" >"conftest.tmp" mv "conftest.tmp" "conftest.in" cp "conftest.in" "conftest.nl" echo 'EGREP' >> "conftest.nl" "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break ac_count=`expr $ac_count + 1` if test $ac_count -gt ${ac_path_EGREP_max-0}; then # Best one so far, save it but keep looking for a better one ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_max=$ac_count fi # 10*(2^10) chars as input seems more than enough test $ac_count -gt 10 && break done rm -f conftest.in conftest.tmp conftest.nl conftest.out;; esac $ac_path_EGREP_found && break 3 done done done IFS=$as_save_IFS fi EGREP="$ac_cv_path_EGREP" if test -z "$EGREP"; then { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5 echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;} { (exit 1); exit 1; }; } fi else ac_cv_path_EGREP=$EGREP fi fi fi { echo "$as_me:$LINENO: result: $ac_cv_path_EGREP" >&5 echo "${ECHO_T}$ac_cv_path_EGREP" >&6; } EGREP="$ac_cv_path_EGREP" if test $ac_cv_c_compiler_gnu = yes; then { echo "$as_me:$LINENO: checking whether $CC needs -traditional" >&5 echo $ECHO_N "checking whether $CC needs -traditional... $ECHO_C" >&6; } if test "${ac_cv_prog_gcc_traditional+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_pattern="Autoconf.*'x'" cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include Autoconf TIOCGETP _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "$ac_pattern" >/dev/null 2>&1; then ac_cv_prog_gcc_traditional=yes else ac_cv_prog_gcc_traditional=no fi rm -f conftest* if test $ac_cv_prog_gcc_traditional = no; then cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include Autoconf TCGETA _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "$ac_pattern" >/dev/null 2>&1; then ac_cv_prog_gcc_traditional=yes fi rm -f conftest* fi fi { echo "$as_me:$LINENO: result: $ac_cv_prog_gcc_traditional" >&5 echo "${ECHO_T}$ac_cv_prog_gcc_traditional" >&6; } if test $ac_cv_prog_gcc_traditional = yes; then CC="$CC -traditional" fi fi if test "$GCC" = yes; then CFLAGS="$CFLAGS -W -Wall"; fi # Checks for libraries. { echo "$as_me:$LINENO: checking for openpty in -lutil" >&5 echo $ECHO_N "checking for openpty in -lutil... $ECHO_C" >&6; } if test "${ac_cv_lib_util_openpty+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-lutil $LIBS" cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char openpty (); int main () { return openpty (); ; return 0; } _ACEOF rm -f conftest.$ac_objext conftest$ac_exeext if { (ac_try="$ac_link" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_link") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest$ac_exeext && $as_test_x conftest$ac_exeext; then ac_cv_lib_util_openpty=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_cv_lib_util_openpty=no fi rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { echo "$as_me:$LINENO: result: $ac_cv_lib_util_openpty" >&5 echo "${ECHO_T}$ac_cv_lib_util_openpty" >&6; } if test $ac_cv_lib_util_openpty = yes; then cat >>confdefs.h <<_ACEOF #define HAVE_LIBUTIL 1 _ACEOF LIBS="-lutil $LIBS" fi { echo "$as_me:$LINENO: checking for socket in -lsocket" >&5 echo $ECHO_N "checking for socket in -lsocket... $ECHO_C" >&6; } if test "${ac_cv_lib_socket_socket+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else ac_check_lib_save_LIBS=$LIBS LIBS="-lsocket $LIBS" cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ /* Override any GCC internal prototype to avoid an error. Use char because int might match the return type of a GCC builtin and then its argument prototype would still apply. */ #ifdef __cplusplus extern "C" #endif char socket (); int main () { return socket (); ; return 0; } _ACEOF rm -f conftest.$ac_objext conftest$ac_exeext if { (ac_try="$ac_link" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_link") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest$ac_exeext && $as_test_x conftest$ac_exeext; then ac_cv_lib_socket_socket=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_cv_lib_socket_socket=no fi rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \ conftest$ac_exeext conftest.$ac_ext LIBS=$ac_check_lib_save_LIBS fi { echo "$as_me:$LINENO: result: $ac_cv_lib_socket_socket" >&5 echo "${ECHO_T}$ac_cv_lib_socket_socket" >&6; } if test $ac_cv_lib_socket_socket = yes; then cat >>confdefs.h <<_ACEOF #define HAVE_LIBSOCKET 1 _ACEOF LIBS="-lsocket $LIBS" fi # Checks for header files. { echo "$as_me:$LINENO: checking for ANSI C header files" >&5 echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6; } if test "${ac_cv_header_stdc+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include #include #include #include int main () { ; return 0; } _ACEOF rm -f conftest.$ac_objext if { (ac_try="$ac_compile" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_compile") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext; then ac_cv_header_stdc=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_cv_header_stdc=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext if test $ac_cv_header_stdc = yes; then # SunOS 4.x string.h does not declare mem*, contrary to ANSI. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "memchr" >/dev/null 2>&1; then : else ac_cv_header_stdc=no fi rm -f conftest* fi if test $ac_cv_header_stdc = yes; then # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "free" >/dev/null 2>&1; then : else ac_cv_header_stdc=no fi rm -f conftest* fi if test $ac_cv_header_stdc = yes; then # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. if test "$cross_compiling" = yes; then : else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include #include #if ((' ' & 0x0FF) == 0x020) # define ISLOWER(c) ('a' <= (c) && (c) <= 'z') # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) #else # define ISLOWER(c) \ (('a' <= (c) && (c) <= 'i') \ || ('j' <= (c) && (c) <= 'r') \ || ('s' <= (c) && (c) <= 'z')) # define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) #endif #define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) int main () { int i; for (i = 0; i < 256; i++) if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) return 2; return 0; } _ACEOF rm -f conftest$ac_exeext if { (ac_try="$ac_link" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_link") 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { ac_try='./conftest$ac_exeext' { (case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_try") 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then : else echo "$as_me: program exited with status $ac_status" >&5 echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ( exit $ac_status ) ac_cv_header_stdc=no fi rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext fi fi fi { echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5 echo "${ECHO_T}$ac_cv_header_stdc" >&6; } if test $ac_cv_header_stdc = yes; then cat >>confdefs.h <<\_ACEOF #define STDC_HEADERS 1 _ACEOF fi # On IRIX 5.3, sys/types and inttypes.h are conflicting. for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \ inttypes.h stdint.h unistd.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (ac_try="$ac_compile" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_compile") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext; then eval "$as_ac_Header=yes" else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 eval "$as_ac_Header=no" fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } if test `eval echo '${'$as_ac_Header'}'` = yes; then cat >>confdefs.h <<_ACEOF #define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 _ACEOF fi done for ac_header in fcntl.h sys/select.h sys/socket.h sys/time.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } else # Is the header compilable? { echo "$as_me:$LINENO: checking $ac_header usability" >&5 echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (ac_try="$ac_compile" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_compile") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext; then ac_header_compiler=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_compiler=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 echo "${ECHO_T}$ac_header_compiler" >&6; } # Is the header present? { echo "$as_me:$LINENO: checking $ac_header presence" >&5 echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include <$ac_header> _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then ac_header_preproc=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_preproc=no fi rm -f conftest.err conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 echo "${ECHO_T}$ac_header_preproc" >&6; } # So? What about this header? case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in yes:no: ) { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5 echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5 echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;} ac_header_preproc=yes ;; no:yes:* ) { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5 echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5 echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5 echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5 echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5 echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5 echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;} ( cat <<\_ASBOX ## -------------------------------------------- ## ## Report this to crigler@users.sourceforge.net ## ## -------------------------------------------- ## _ASBOX ) | sed "s/^/$as_me: WARNING: /" >&2 ;; esac { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 else eval "$as_ac_Header=\$ac_header_preproc" fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } fi if test `eval echo '${'$as_ac_Header'}'` = yes; then cat >>confdefs.h <<_ACEOF #define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 _ACEOF fi done for ac_header in sys/ioctl.h sys/resource.h pty.h termios.h util.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } else # Is the header compilable? { echo "$as_me:$LINENO: checking $ac_header usability" >&5 echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (ac_try="$ac_compile" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_compile") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext; then ac_header_compiler=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_compiler=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 echo "${ECHO_T}$ac_header_compiler" >&6; } # Is the header present? { echo "$as_me:$LINENO: checking $ac_header presence" >&5 echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include <$ac_header> _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then ac_header_preproc=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_preproc=no fi rm -f conftest.err conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 echo "${ECHO_T}$ac_header_preproc" >&6; } # So? What about this header? case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in yes:no: ) { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5 echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5 echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;} ac_header_preproc=yes ;; no:yes:* ) { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5 echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5 echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5 echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5 echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5 echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;} { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5 echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;} ( cat <<\_ASBOX ## -------------------------------------------- ## ## Report this to crigler@users.sourceforge.net ## ## -------------------------------------------- ## _ASBOX ) | sed "s/^/$as_me: WARNING: /" >&2 ;; esac { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 else eval "$as_ac_Header=\$ac_header_preproc" fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } fi if test `eval echo '${'$as_ac_Header'}'` = yes; then cat >>confdefs.h <<_ACEOF #define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 _ACEOF fi done for ac_header in libutil.h stropts.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then { echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then echo $ECHO_N "(cached) $ECHO_C" >&6 fi ac_res=`eval echo '${'$as_ac_Header'}'` { echo "$as_me:$LINENO: result: $ac_res" >&5 echo "${ECHO_T}$ac_res" >&6; } else # Is the header compilable? { echo "$as_me:$LINENO: checking $ac_header usability" >&5 echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (ac_try="$ac_compile" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_compile") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { test -z "$ac_c_werror_flag" || test ! -s conftest.err } && test -s conftest.$ac_objext; then ac_header_compiler=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_compiler=no fi rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 echo "${ECHO_T}$ac_header_compiler" >&6; } # Is the header present? { echo "$as_me:$LINENO: checking $ac_header presence" >&5 echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6; } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include <$ac_header> _ACEOF if { (ac_try="$ac_cpp conftest.$ac_ext" case "(($ac_try" in *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; *) ac_try_echo=$ac_try;; esac eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null && { test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || test ! -s conftest.err }; then ac_header_preproc=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_preproc=no fi rm -f conftest.err conftest.$ac_ext { echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 echo "${ECHO_T}$ac_header_preproc" >&6; } # So? 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So we exec the FD to /dev/null, # effectively closing config.log, so it can be properly (re)opened and # appended to by config.status. When coming back to configure, we # need to make the FD available again. if test "$no_create" != yes; then ac_cs_success=: ac_config_status_args= test "$silent" = yes && ac_config_status_args="$ac_config_status_args --quiet" exec 5>/dev/null $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false exec 5>>config.log # Use ||, not &&, to avoid exiting from the if with $? = 1, which # would make configure fail if this is the last instruction. $ac_cs_success || { (exit 1); exit 1; } fi dtach-0.8/configure.ac0000644000175000017500000000160710750261732014601 0ustar criglercrigler# Process this file with autoconf to produce a configure script. AC_INIT(dtach, 0.8, crigler@users.sourceforge.net) AC_PREREQ(2.59) AC_CONFIG_SRCDIR(main.c) AC_CONFIG_HEADER(config.h) # Checks for programs. AC_PROG_CC AC_PROG_GCC_TRADITIONAL if test "$GCC" = yes; then CFLAGS="$CFLAGS -W -Wall"; fi # Checks for libraries. AC_CHECK_LIB(util, openpty) AC_CHECK_LIB(socket, socket) # Checks for header files. AC_CHECK_HEADERS(fcntl.h sys/select.h sys/socket.h sys/time.h) AC_CHECK_HEADERS(sys/ioctl.h sys/resource.h pty.h termios.h util.h) AC_CHECK_HEADERS(libutil.h stropts.h) AC_HEADER_TIME # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST AC_TYPE_PID_T # Checks for library functions. AC_TYPE_SIGNAL AC_CHECK_FUNCS(atexit dup2 memset) AC_CHECK_FUNCS(select socket strerror) AC_CHECK_FUNCS(openpty forkpty ptsname grantpt unlockpt) AC_CONFIG_FILES(Makefile) AC_OUTPUT dtach-0.8/dtach.10000644000175000017500000001212410750261732013454 0ustar criglercrigler.TH dtach 1 "Jan 2008" "dtach 0.8" .SH NAME dtach \- simple program that emulates the detach feature of screen. .SH SYNOPSIS .B dtach \-a .I .br .B dtach \-A .I .br .B dtach \-c .I .br .B dtach \-n .I .SH DESCRIPTION .B dtach is a program that emulates the detach feature of screen. It is designed to be transparent and un-intrusive; it avoids interpreting the input and output between attached terminals and the program under its control. Consequently, it works best with full-screen applications such as emacs. .B dtach is intended for users who want the detach feature of screen without the other overhead of screen. It is tiny, does not use many libraries, and stays out of the way as much as possible. .SS SESSIONS A session in .B dtach is a single instance in which a program is running under the control of .BR dtach . The program is disassociated from the original terminal, and is thus protected from your original terminal being disconnected for some reason. .PP Other instances of .B dtach can attach themselves to a particular session. Input and output is copied between the program running in the .B dtach session, and the attached terminals. .PP .B dtach avoids interpreting the communication stream between the program and the attached terminals; it instead relies on the ability of the attached terminals to manage the screen. .PP Sessions are represented by Unix-domain sockets in the filesystem. No other permission checking other than the filesystem access checks is performed. .B dtach creates a master process that monitors the session socket, the program, and any attached terminals. .PP .SS MODES .B dtach has several modes of operation. It can create a new session in which a program is executed, or it can attach to an existing session. The first argument specifies which mode .B dtach should operate in. .TP .B \-a Attach to an existing session. .B dtach attaches itself to the session specified by .IR . After the attach is completed, the window size of the current terminal is sent to the master process, and a redraw is also requested. .TP .B \-A Attach to an existing session, or create a new one. .B dtach first tries to attach to the session specified by .I if possible. If the attempt to open the socket fails, .B dtach tries to create a new session before attaching to it. .TP .B \-c Creates a new session. A new session is created in which the specified program is executed. .B dtach then tries to attach itself to the newly created session. .TP .B \-n Creates a new session, without attaching to it. A new session is created in which the specified program is executed. .B dtach does not try to attach to the newly created session, however, and exits instead. .PP .SS OPTIONS .B dtach has a few options that allow you to modify its behavior. Each attaching process can have separate settings for these options, which allows for some flexibility. .TP .BI "\-e " "" Sets the detach character to .IR . When the detach character is pressed, .B dtach detaches itself from the current session and exits. The process running in the session is unaffected by the detach. By default, the detach character is set to ^\e (Ctrl-\e). .TP .B \-E Disables the detach character. .B dtach does not try to scan input from the terminal for a detach character. The only way to detach from the session is then by sending the attaching process an appropriate signal. .TP .BI "\-r " "" Sets the redraw method to .IR . The valid methods are .IR none , .IR ctrl_l , or .IR winch . .I none disables redrawing completely, .I ctrl_l sends a Ctrl L character to the program if the terminal is in character-at-a-time and no-echo mode, and .I winch forces a WINCH signal to be sent to the program. When creating a new session, the specified method is used as the default redraw method for the session. If not specified, the .I ctrl_l method is used. .TP .B \-z Disables processing of the suspend key. Normally, .B dtach will suspend itself when the suspend key is pressed. With this option, the suspend character is sent to the session instead of being handled by .BR dtach . .PP .SH EXAMPLES The following example creates a new session that has the detach character and suspend processing disabled. A socket is created in the /tmp directory for the session. .nf $ dtach \-c /tmp/foozle \-Ez bash .fi The following example attaches to the /tmp/foozle session if it exists, and if not, creates a new session using /tmp/foozle as the socket for the session. Processing of the suspend character is also disabled for the attach instance. .nf $ dtach \-A /tmp/foozle \-z bash .fi The following example attaches to the /tmp/foozle session, using the .I winch redraw method to redraw the screen. .nf $ dtach \-a /tmp/foozle \-r winch .fi The following example creates a new session and sets the default redraw method for the session to the .I winch redraw method. .nf $ dtach \-c /tmp/foozle \-r winch bash .fi .PP .SH AUTHOR Ned T. Crigler . .SH "SEE ALSO" .BR screen "(1)"