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* src/login.c: Added comments.

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* src/login.c: Close the user and group files before dropping root
	privileges.
This commit is contained in:
nekral-guest 2009-04-20 12:27:27 +00:00
parent 3508f7dccc
commit 61c1d100dc
2 changed files with 26 additions and 8 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2009-04-20 Nicolas François <nicolas.francois@centraliens.net>
* src/login.c: Added comments.
* src/login.c: Close the user and group files before dropping root
privileges.
2009-04-20 Nicolas François <nicolas.francois@centraliens.net>
* src/login.c: We do not need to keep the old umask. Discard the

28
src/login.c
View File

@ -2,7 +2,7 @@
* Copyright (c) 1989 - 1994, Julianne Frances Haugh
* Copyright (c) 1996 - 2001, Marek Michałkiewicz
* Copyright (c) 2001 - 2006, Tomasz Kłoczko
* Copyright (c) 2007 - 2008, Nicolas François
* Copyright (c) 2007 - 2009, Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -838,6 +838,10 @@ int main (int argc, char **argv)
exit (1);
}
/* This set up the process credential (group) and initialize the
* supplementary group access list.
* This has to be done before pam_setcred
*/
if (setup_groups (pwd) != 0) {
exit (1);
}
@ -1156,10 +1160,24 @@ int main (int argc, char **argv)
}
}
/* We call set_groups() above because this clobbers pam_groups.so */
/*
* Close all the files so that unauthorized access won't occur.
*/
endpwent (); /* stop access to password file */
endgrent (); /* stop access to group file */
endspent (); /* stop access to shadow passwd file */
#ifdef SHADOWGRP
endsgent (); /* stop access to shadow group file */
#endif
/* Drop root privileges */
#ifndef USE_PAM
if (setup_uid_gid (&pwent, is_console))
#else
/* The group privileges were already dropped.
* See setup_groups() above.
*/
if (change_uid (&pwent))
#endif
{
@ -1247,12 +1265,6 @@ int main (int argc, char **argv)
(void) signal (SIGHUP, SIG_DFL); /* added this. --marekm */
(void) signal (SIGINT, SIG_DFL); /* default interrupt signal */
endpwent (); /* stop access to password file */
endgrent (); /* stop access to group file */
endspent (); /* stop access to shadow passwd file */
#ifdef SHADOWGRP
endsgent (); /* stop access to shadow group file */
#endif
if (0 == pwent.pw_uid) {
SYSLOG ((LOG_NOTICE, "ROOT LOGIN %s", fromhost));
} else if (getdef_bool ("LOG_OK_LOGINS")) {