fgetty-0.6.orig/0000755000077300007730000000000010014133031013506 5ustar papepape00000000000000fgetty-0.6.orig/.cvsignore0000644000077300007730000000004210014113175015511 0ustar papepape00000000000000checkpassword fgetty login login2 fgetty-0.6.orig/CHANGES0000644000077300007730000000304110014113174014505 0ustar papepape000000000000000.6: the utmp code was broken. It only looked for the PID, not for the "line" (device). So utmp grew needlessly. fixed make install add man page from Tino Reichard Enrico Scholz sent a patch that adds --long-hostname and adds error checking for gethostname when it is not \0-terminated. 0.5 login will accept passwords up to 99 characters (previously it limited to 8 because DES crypt() only looks at the first 8 characters anyway). With MD5 crypt support, that's not so smart a move. Laurent BERCOT reported this bug. Thanks, Laurent! Also, login will try to add users to group "console". This can be used to give console users write access to the sound device. 0.4 fgetty will turn echo off before executing login. This fixes the age-old security problem when the load is heavy at login: host login: hax0r imsol33tPassword: _ 0.3.1 login2 contained a bad beginner's error regarding error checking when reading motd. If you didn't have motd, login2 would loop :-( Found and fixed by Michael Bacarella. 0.3 added a checkpassword that accepts a "nosetuid" flag in the additional data section of the checkpassword API and then omits the setuid(). Then, the called application (in the fgetty case, /bin/login2) can do a "chown $UID. $TTY" before doing the setuid() call itself, so finally, your TTY belongs to you. screen was always complaining ;) 0.2: added login and login2 and edited README to "document" them. fgetty will now also put $TTY and $HOST in the environment. fgetty-0.6.orig/COPYING0000644000077300007730000004313110014113175014552 0ustar papepape00000000000000 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. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. 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. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. 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If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. 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If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. 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. fgetty-0.6.orig/Makefile0000644000077300007730000000304010014113174015151 0ustar papepape00000000000000# Uncomment the following if you are a distribution maker and want to # install to somewhere else than / #DESTDIR=/tmp/fefix all: fgetty login login2 checkpassword DIET=diet #CROSS=arm-linux- CROSS= LDFLAGS=-s %.o: %.c # gcc -march=i386 -mcpu=i386 -pipe -Os -fomit-frame-pointer -I../dietlibc/include -c $^ -DTEST $(DIET) $(CROSS)gcc -pipe -Os -fomit-frame-pointer -I../dietlibc/include -c $^ -DTEST # gcc -march=i386 -mcpu=i386 -pipe -g -I../dietlibc/include -DTEST -c $^ strip -x -R .comment -R .note $@ %: %.o $(DIET) $(CROSS)gcc -nostdlib -o $@ $^ $(LDFLAGS) fgetty: fgetty.o fmt_ulong.o login: login.o login2: login2.o checkpassword: checkpassword.o debug: fgetty.c fmt_ulong.o gcc -g -o debug fgetty.c fmt_ulong.o -DDEBUG install: install -d $(DESTDIR)/bin $(DESTDIR)/sbin install login $(DESTDIR)/bin/login1 install login2 $(DESTDIR)/bin install fgetty $(DESTDIR)/sbin install checkpassword $(DESTDIR)/bin/checkpassword.login install -m 644 fgetty.8 $(DESTDIR)/usr/man/man8/fgetty.8 @echo "now change your /etc/inittab to do something like" @echo " 1:123:respawn:/sbin/fgetty /dev/vc/1 --noclear" clean: rm -f *.o fgetty debug dietgetty login login2 checkpassword core sigs: fgetty.sig login.sig login2.sig checkpassword.sig .SUFFIXES: .sig %.sig: % gpg --detach-sign $< VERSION=fgetty-$(shell head -1 CHANGES|sed 's/://') CURNAME=$(notdir $(shell pwd)) tar: clean rename cd ..; tar cvvf $(VERSION).tar.bz2 $(VERSION) --use=bzip2 --exclude CVS rename: if test $(CURNAME) != $(VERSION); then cd .. && mv $(CURNAME) $(VERSION); fi fgetty-0.6.orig/README0000644000077300007730000000422110014113174014373 0ustar papepape00000000000000 This is actually a mingetty without the printfs. Why? Because then you can link it against dietlibc (http://www.fefe.de/dietlibc/). Actually, diet libc now supports printf, but not using it makes binaries smaller nonetheless. The difference is remarkable: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 5487 0.0 0.1 1180 444 tty5 S 00:40 0:00 /sbin/mingetty tty5 root 6035 0.0 0.0 16 16 tty5 S 00:45 0:00 /sbin/fgetty tty5 I saw that on some really absurdly broken crap Linux distributions (apparently the ones using PAM ;-}), login stay in memory as long as a user is logged in, wasting precious memory. So I decided to write a replacement login as well. My login uses the checkpassword (see http://cr.yp.to/checkpwd.html) password checking interface. For the casual end-user, this means that you will need to get and install checkpassword. For others, this means unprecedented flexibility for the system administrator, because the authentication for login can be done separately from login, and without sacrificing system resources. The default checkpassword program from http://cr.yp.to/checkpwd.html) checks against /etc/passwd and /etc/shadow, but the interface is general enough to make it possible to plug in different authentication, even RADIUS or LDAP or whatever you had in mind. You just have to write the trivial checkpassword utility for your authentication method. I plan to write a few small checkpassword variants to allow for shadowed MD5 passwords from a CBD database, for example. This design has the following drawbacks: 1. since checkpassword exits on error, there is no "bad username/password pair" error message. 2. For the same reason, there is no 1 second delay on bad passwords. We can't wrap checkpassword, because once the wrapper exits, init respawns fgetty. The only good solution would be to make a checkpassword that prints the error message and exits only after a one second delay. login and login2 do _not_ mess with the tty or apply /etc/environment. These are prime cases of unnecessary features in my eyes. Do that in your shell startup files or whatever. fgetty-0.6.orig/checkpassword.c0000644000077300007730000000426310014113175016526 0ustar papepape00000000000000#include #include #include #include extern char** environ; unsigned int fmt_ulong(char *dest,unsigned long i) { register unsigned long len,tmp,len2; /* first count the number of bytes needed */ for (len=1, tmp=i; tmp>9; ++len) tmp/=10; if (dest) for (tmp=i, dest+=len, len2=len+1; --len2; tmp/=10) *--dest = (tmp%10)+'0'; return len; } int main(int argc,char* argv[]) { char buf[513]; char* last; int len; char *login,*passwd,*ptr; struct passwd *pw; struct spwd *spw; if (!argv[1]) return 2; for (len=0; len<512; ) { int tmp; tmp=read(3,buf+len,512-len); if (tmp==-1) return 111; if (tmp==0) break; len+=tmp; } close(3); buf[len]=0; last=buf+len; login=buf; if ((pw=getpwnam(login))) { passwd=pw->pw_passwd; if ((spw=getspnam(login))) passwd=spw->sp_pwdp; if (*passwd && !strcmp(crypt(ptr=login+strlen(login)+1,passwd),passwd)) { char **env,**ep; char buf[100]; for (len=0; environ[len]; ++len) ; env=alloca((len+4)*sizeof(char*)); ep=env; for (len=0; environ[len]; ++len) { if (!strncmp(environ[len],"USER=",5)) continue; if (!strncmp(environ[len],"HOME=",5)) continue; if (!strncmp(environ[len],"SHELL=",6)) continue; if (!strncmp(environ[len],"UID=",4)) continue; *ep=environ[len]; ++ep; } *ep=alloca(strlen(pw->pw_shell)+7); strcat(strcpy(*ep,"SHELL="),pw->pw_shell); ++ep; *ep=alloca(strlen(login)+6); strcat(strcpy(*ep,"USER="),login); ++ep; *ep=alloca(strlen(pw->pw_dir)+7); strcat(strcpy(*ep,"HOME="),pw->pw_dir); ++ep; strcpy(buf,"UID="); buf[4+fmt_ulong(buf+4,pw->pw_uid)]=0; *ep=buf; ++ep; *ep=0; ptr+=strlen(ptr)+1; /* skip password */ if (initgroups(pw->pw_name,pw->pw_gid)==-1) return 1; /* if (setgroups(1,&pw->pw_gid)==-1) return 1; */ if (setgid(pw->pw_gid)==-1) return 1; if (ptr) { ptr+=strlen(ptr)+1; /* skip timestamp */ if (ptr>=last) ptr=0; } if (!ptr || strcmp(ptr,"nosetuid")) if (setuid(pw->pw_uid)==-1) return -1; if (chdir(pw->pw_dir)==-1) return 111; execve(argv[1],argv+1,env); return 111; } } return 1; } fgetty-0.6.orig/fgetty.80000644000077300007730000000446010014113175015114 0ustar papepape00000000000000.\" Tino Reichardt (2002-01-19) .TH FGETTY 8 "2002-01-19" "fgetty" "System Administrator's Manual" .SH "NAME" fgetty \- a small getty for linux .SH "SYNOPSIS" \fBfgetty\fR \fItty\fR [\fI--noclear\fR] [\fI--long-hostname\fR] .SH "DESCRIPTION" The command \fBfgetty\fP is normally invoked by \fIinit(8)\fP, opens a tty port, prompts for a login name and invokes the /bin/login command. .SH "OPTIONS" \fB--noclear\fR makes fgetty not clear the screen before displaying the login prompt. \fB--long-hostname\fR makes fgetty display the full hostname in the login prompt. .SH "FILES" .TS tab (@); l l. /etc/issue@ printed before the login prompt /etc/inittab@ \fIinit\fP(8) configuration file /var/run/utmp@ the system status file .TE .SH ISSUE ESCAPES The issue-file (\fI/etc/issue\fP or the file may contain certain escape codes to display the system name, date and time etc. All escape codes consist of a backslash (\\) immediately followed by one of the letters explained below. .TP d the current date. (eg: 2002-01-19) .TP s the system name, the name of the operating system. (eg: Linux) .TP l the name of the current tty line. (eg: tty3) .TP m the architecture identifier of the machine (eg: i586) .TP n the nodename of the machine, also known as the hostname. (eg: sirius) .TP o the domainname of the machine. (eg: (none)) .TP r the release number of the OS. (eg: 2.4.3-i) .TP t the current time. (eg: 14:51:51) .TP u the number of current users logged in. (eg: 4) .TP U the string "1 user" or " users", where is the number of current users logged in. (eg: 4 users) .TP v Insert the version of the OS. (eg: #2 Fre Jan 18 23:05:45 CET 2002) .SH "ENVIRONMENT VARIABLES" .TS tab (@); l l. HOST@ is set to your hostname TERM@ is set to linux TTY@ is set to the current tty line .TE .SH "RETURN VALUES" .TS tab (@); l l. \fB1\fP @could not chown/chmod tty device \fB3\fP @could not open tty device \fB4\fP @not a typewriter \fB5\fP @vhangup failed \fB6\fP @could not open tty (can't happen) \fB7\fP @dup failed \fB8\fP @could not exec login \fB9\fP @read returned an unexpected error \fB10\fP @unprintable character in login name \fB11\fP @login name too long (>40) \fB13\fP @user name started with a dash \fB23\fP @received SIGQUIT .TE .SH "AUTHOR" Felix von Leitner .PP Homepage: http://www.fefe.de/fgetty/ fgetty-0.6.orig/fgetty.c0000644000077300007730000001532510014113173015167 0ustar papepape00000000000000/* This is mostly mingetty without printf */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include "fmt.h" static struct utsname uts; static char hn[MAXHOSTNAMELEN + 6]="HOST="; static int hn_len=5; static time_t cur_time; static char *tty; static int noclear=0; void error(char *message,int exitcode) { write(2,message,strlen(message)); exit(exitcode); } static void echo_off() { struct termios foo; if (!tcgetattr(0,&foo)) { foo.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL); tcsetattr(0, TCSANOW, &foo); } } int doutmp() { off_t curpos; struct utmp ut; pid_t mypid=getpid(); int fd=open(_PATH_UTMP,O_RDWR); if (fd) { for (;;) { int len; curpos=lseek(fd,0,SEEK_CUR); len=read(fd,&ut,sizeof(ut)); if (len!=sizeof(ut)) break; if (ut.ut_pid==mypid || !strcmp(ut.ut_line,tty+5)) { /* write(1,"found my utmp record\n",21); */ break; } } if (ut.ut_pid!=mypid) { memset(&ut,0,sizeof(ut)); ut.ut_pid=mypid; memcpy(ut.ut_id,tty+3,sizeof(ut.ut_id)); } memcpy(ut.ut_user,"LOGIN",6); memcpy(ut.ut_line,tty+5,sizeof(ut.ut_line)); ut.ut_tv.tv_sec=cur_time; ut.ut_type=LOGIN_PROCESS; lseek(fd,curpos,SEEK_SET); write(fd,&ut,sizeof(ut)); close(fd); } if ((fd=open(_PATH_WTMP,O_APPEND|O_WRONLY))>=0) { write(fd,&ut,sizeof(ut)); close(fd); } } void sigquit_handler(int signum) { error("SIGQUIT received\n",23); } void open_tty() { struct sigaction sa; int fd; if (chown(tty,0,0) || chmod(tty,0600)) error("could not chown/chmod tty device\n",1); sa.sa_handler=SIG_IGN; sa.sa_flags=0; sigemptyset(&sa.sa_mask); sigaction(SIGHUP,&sa,NULL); sa.sa_handler=sigquit_handler; sigaction(SIGQUIT,&sa,NULL); if ((fd=open(tty, O_RDWR, 0))<0 || ioctl (fd, TIOCSCTTY, (void *)1)==-1) error("could not open tty device\n",3); if (!isatty(fd)) error("\"not a typewriter\" ;-)\n",4); if (vhangup()) /* linux specific */ error("vhangup failed\n",5); close(2); close(1); close(0); close(fd); if (open(tty,O_RDWR,0) != 0) error("could not open tty\n",6); if (dup(0) != 1 || dup(0) != 2) error("could not dup stdout and stderr\n",7); if (!noclear) write(0,"\033c",2); /* linux specific */ sa.sa_handler=SIG_DFL; sa.sa_flags=0; sigemptyset(&sa.sa_mask); sigaction(SIGHUP,&sa,NULL); } void output_special_char(char c) { switch (c) { case 's': write(1,uts.sysname,strlen(uts.sysname)); break; case 'n': write(1,uts.nodename,strlen(uts.nodename)); break; case 'r': write(1,uts.release,strlen(uts.release)); break; case 'v': write(1,uts.version,strlen(uts.version)); break; case 'm': write(1,uts.machine,strlen(uts.machine)); break; case 'o': write(1,uts.domainname,strlen(uts.domainname)); break; case 't': case 'd': { time_t now; struct tm *tm; char buf[30]; char *tmp; time (&now); tm = localtime (&now); if (c == 'd') { tmp=buf+fmt_ulong(buf,tm->tm_year+1900); *tmp++='-'; tm->tm_mon++; *tmp++=tm->tm_mon/10+'0'; *tmp++=tm->tm_mon%10+'0'; *tmp++='-'; *tmp++=tm->tm_mday/10+'0'; *tmp++=tm->tm_mday%10+'0'; *tmp++=0; write(1,buf,strlen(buf)); #if 0 /* ISO 8601 */ printf ("%d-%02d-%02d", tm->tm_year, tm->tm_mon+1, tm->tm_mday); #endif } else { buf[0]=tm->tm_hour/10+'0'; buf[1]=tm->tm_hour%10+'0'; buf[2]=':'; buf[3]=tm->tm_min/10+'0'; buf[4]=tm->tm_min%10+'0'; buf[5]=':'; buf[6]=tm->tm_sec/10+'0'; buf[7]=tm->tm_sec%10+'0'; write(1,buf,8); } #if 0 tmp=buf; printf ("%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec); #endif break; } case 'l': write(1,tty+5,strlen(tty)-5); break; case 'u': case 'U': { int users=0; struct utmp ut; int fd=open(_PATH_UTMP,O_RDWR); char buf[20]; if (fd) { for (;;) { int len; len=read(fd,&ut,sizeof(ut)); if (len!=sizeof(ut)) break; if (ut.ut_type == USER_PROCESS) users++; } close(fd); } write(1,buf,fmt_ulong(buf,users)); if (c=='U') { if (users==1) write(1," user",5); else write(1," users",6); } } break; default: write(1,&c,1); } } void do_prompt() { int fd=open("/etc/issue",O_RDONLY); char *buf; off_t length; write(1,"\n",1); if (fd) { char *c,*last; length=lseek(fd,0,SEEK_END); lseek(fd,0,SEEK_SET); buf=alloca(length+1); read(fd,buf,length); close(fd); last=buf+length; for (c=buf; c='A' && c<='Z') || (c>='a' && c<='z') || (c>='0' && c<='9') || (c=='_' || c=='.' || c==',' || c=='-')); } char *get_logname() { static char logname[40]; char *c; ioctl(0, TCFLSH, 0); /* flush pending input */ for (*logname=0; *logname==0; ) { do_prompt(); for (c=logname;;) { if (read(0,c,1)<1) { if (errno==EINTR || errno==EIO || errno==ENOENT) exit(0); error("received strange error\n",9); } if (*c == '\n' || *c == '\r') { *c=0; break; } else if (!isprint(*c)) error("unprintable character in login name\n",10); else if (c-logname >= sizeof(logname)-1) error("login name too long\n",11); else c++; } } #if 0 write(1,"\n\ngot name ",11); write(1,logname,strlen(logname)); write(1,"\n\n",2); #endif return logname; } extern char ** environ; char ttybuf[20]="/dev/"; char ttybuf2[25]="TTY="; int main(int argc,char *argv[]) { char *loginargv[]={"/bin/login", "--", 0, 0}; char *logname; int i; char hostname_end='.'; tty=argv[1]; if (tty[0]=='/') strncpy(ttybuf,tty,15); else strncpy(ttybuf+5,tty,10); tty=ttybuf; strcpy(ttybuf2+4,ttybuf); uname(&uts); if (gethostname(hn+5, MAXHOSTNAMELEN)!=0) hn[5]=0; hn[5+MAXHOSTNAMELEN]=0; putenv("TERM=linux"); putenv(ttybuf2); putenv(hn); time(&cur_time); for (i=2; i 9) { ++len; q /= 10; } if (s) { s += len; do { *--s = '0' + (u % 10); u /= 10; } while(u); /* handles u == 0 */ } return len; } fgetty-0.6.orig/login.c0000644000077300007730000000663610014113174015003 0ustar papepape00000000000000/* diet login without all the bloat but with checkpassword for pluggable * authentication support. */ /* algorithm: 1. argv[1] is the user name (optional: argv[2-argc] are environment variables) 2. print "user's password: " to stdout 3. set terminal to "don't echo" 4. read password 5. set terminal to "echo" 6. fork and run checkpassword login2 7. wait() for checkpassword 8. if checkpassword returns 1, the password was wrong. sleep(1) and ++counter 9. if counter reaches 5, sleep(5) and exit login2 is expected to: 1. kill ppid (i.e. this process) if it is run. 2. print motd unless (-f .hushlogin) 3. check for mail (maybe) 4. set TERM according to /etc/ttytypes 5. edit utmp and wtmp (uh-oh, how should we do this? We are not root any more!) 6. exec $SHELL */ #define CHECKPASSWORD "/bin/checkpassword.login" #define FALLBACKCHECKPASSWORD "/bin/checkpassword" #define LOGIN2 "/bin/login2" #include #include #include #include #include #include #include #include void die(const char *message) { write(2,message,strlen(message)); write(2,"\n",1); exit(1); } struct termios oldtermios; static void echo_off() { struct termios foo; if (tcgetattr(0,&oldtermios)) die("tcgetattr failed"); foo=oldtermios; foo.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL); tcsetattr(0, TCSANOW, &foo); } static void echo_on() { oldtermios.c_lflag |= ECHO | ECHOE | ECHOK; tcsetattr(0, TCSANOW, &oldtermios); } main(int argc,char *argv[]) { int filedes[2]; char *username=argv[1]; char *buf; char __username[100]; char password[100]; int pwlen; char *Argv[]={"checkpassword",LOGIN2,0}; pid_t child; int utmpfd,wtmpfd; { int i=1; while (username && username[0]=='-') username=argv[++i]; } if (!username) { char *host=getenv("HOST"); if (host) { int len=strlen(host); host[len]=' '; write(0,host,len+1); host[len]=0; } write(0,"login: ",7); pwlen=read(0,__username,9); if (pwlen<0) die("read failed"); __username[pwlen-1]=0; /* skip newline */ username=__username; } { buf=alloca(strlen(username)+20); strcpy(buf,username); strcat(buf,"'s password: "); write(1,buf,strlen(buf)); } echo_off(); pwlen=read(0,password,99); if (pwlen<0) die("read failed"); password[pwlen-1]=0; echo_on(); write(1,"\n",1); if (pipe(filedes)) die("pipe failed"); if (filedes[0]!=3) die("pipe did not return fd 3"); switch (child=fork()) { case -1: die("login: could not fork"); case 0: /* child */ close(3); { char buf[512]; int len; len=strlen(username)+1; strcpy(buf,username); strlcpy(buf+len,password,512-len); len+=strlen(password)+1; /* buf[len++]='Y'; */ len+=__ltostr(buf+len,512-len,time(0),10,0); buf[len]=0; if (len<400) { strcpy(buf+len+1,"nosetuid"); len+=9; } write(4,buf,len+1); close(4); } break; default: close(4); utmpfd=open(_PATH_UTMP,O_RDWR); wtmpfd=open(_PATH_WTMP,O_APPEND|O_WRONLY); if (utmpfd!=4 || wtmpfd!=5) { close(utmpfd); close(wtmpfd); write(2,"utmpfd!=4 || wtmpfd!=5\n",24); } execve(CHECKPASSWORD,Argv,environ); if (errno==ENOENT) execve(FALLBACKCHECKPASSWORD,Argv,environ); die("login: could not exec checkpassword"); } } fgetty-0.6.orig/login2.c0000644000077300007730000000504210014113174015053 0ustar papepape00000000000000/* diet login without all the bloat but with checkpassword for pluggable * authentication support. */ /* algorithm: 1. print motd unless (-f .hushlogin) 2. check for mail (maybe) 3. set TERM according to /etc/ttytypes 4. edit utmp and wtmp (passed as fd 4 and fd 5) 5. exec $SHELL */ #include #include #include #include #include #include #include void die(const char *message) { write(2,message,strlen(message)); write(2,"\n",1); exit(1); } extern char **environ; int doutmp(const char *login) { off_t curpos; struct utmp ut; pid_t mypid=getpid(); int fd=4; for (;;) { int len; curpos=lseek(fd,0,SEEK_CUR); len=read(fd,&ut,sizeof(ut)); if (len!=sizeof(ut)) break; if (ut.ut_pid==mypid) { /* write(1,"found my utmp record\n",21); */ break; } } if (ut.ut_pid!=mypid) { memset(&ut,0,sizeof(ut)); ut.ut_pid=mypid; memcpy(ut.ut_id,getenv("TTY")+4+3,sizeof(ut.ut_id)); } strncpy(ut.ut_user,login,sizeof(ut.ut_user)); ut.ut_tv.tv_sec=time(0); ut.ut_type=USER_PROCESS; lseek(fd,curpos,SEEK_SET); write(fd,&ut,sizeof(ut)); close(4); write(5,&ut,sizeof(ut)); close(5); } main(int argc,char *argv[]) { int fd; char *shell=getenv("SHELL"); char *Argv[]={"-sh",0}; char *login=getenv("USER"); if (getuid()==0) { /* checkpassword honored "nosetuid" */ char *tmp=getenv("UID"); char *tty=getenv("TTY"); if (tmp) { uid_t u=strtoul(tmp,&tmp,10); struct group *g=getgrnam("console"); gid_t gid=getgid(); if (*tmp==0) chown(tty,u,gid); initgroups(login,g?g->gr_gid:gid); /* if it fails, too bad. checkpassword should already have made * sure no additional groups are there */ setuid(u); if (u && getuid()!=u) return 2; } else return 2; } close(11); if ((fd=open(".hushlogin",O_RDONLY))>=0) close(fd); else { if ((fd=open("/etc/motd",O_RDONLY))>=0) { char buf[1024]; int len; while ((len=read(fd,buf,1024))>0) write(0,buf,len); close(fd); } } /* login passes open utmp and wtmp on fd #4 and #5 */ doutmp(login); { char *buf=alloca(strlen(login)+20); strcpy(buf,"LOGNAME="); strcat(buf,login); putenv(buf); if (shell) { char *tmp=strrchr(shell,'/'); char *argv0=alloca(strlen(shell)+2); if (tmp) ++tmp; else tmp=shell; strcpy(argv0+1,tmp); *argv0='-'; Argv[0]=argv0; execve(shell,Argv,environ); } execve("/bin/sh",Argv,environ); } }