From 1edf6684b4713b0848f425d474fc1a43b073942d Mon Sep 17 00:00:00 2001 From: Perberos Date: Fri, 4 Nov 2011 22:37:08 -0300 Subject: quitando archivos generados por astyle --- src/setuid.c.orig | 247 ------------------------------------------------------ 1 file changed, 247 deletions(-) delete mode 100644 src/setuid.c.orig (limited to 'src/setuid.c.orig') diff --git a/src/setuid.c.orig b/src/setuid.c.orig deleted file mode 100644 index 2c55c2e..0000000 --- a/src/setuid.c.orig +++ /dev/null @@ -1,247 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- - * - * setuid.c --- management of runtime privileges. - * - * xscreensaver, Copyright (c) 1993-1998 Jamie Zawinski - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation. No representations are made about the suitability of this - * software for any purpose. It is provided "as is" without express or - * implied warranty. - */ - -#include "config.h" - -#ifndef EPERM -#include -#endif - -#include -#include -#include -#include -#include /* for getpwnam() and struct passwd */ -#include /* for getgrgid() and struct group */ -#include - -#include "setuid.h" - -static char * -uid_gid_string (uid_t uid, - gid_t gid) -{ - static char *buf; - struct passwd *p = NULL; - struct group *g = NULL; - - p = getpwuid (uid); - g = getgrgid (gid); - - buf = g_strdup_printf ("%s/%s (%ld/%ld)", - (p && p->pw_name ? p->pw_name : "???"), - (g && g->gr_name ? g->gr_name : "???"), - (long) uid, (long) gid); - - return buf; -} - -static gboolean -set_ids_by_number (uid_t uid, - gid_t gid, - char **message_ret) -{ - int uid_errno = 0; - int gid_errno = 0; - int sgs_errno = 0; - struct passwd *p = getpwuid (uid); - struct group *g = getgrgid (gid); - - if (message_ret) - *message_ret = NULL; - - /* Rumor has it that some implementations of of setuid() do nothing - when called with -1; therefore, if the "nobody" user has a uid of - -1, then that would be Really Bad. Rumor further has it that such - systems really ought to be using -2 for "nobody", since that works. - So, if we get a uid (or gid, for good measure) of -1, switch to -2 - instead. Note that this must be done after we've looked up the - user/group names with getpwuid(-1) and/or getgrgid(-1). - */ - if (gid == (gid_t) -1) gid = (gid_t) -2; - if (uid == (uid_t) -1) uid = (uid_t) -2; - - errno = 0; - if (setgroups (1, &gid) < 0) - sgs_errno = errno ? errno : -1; - - errno = 0; - if (setgid (gid) != 0) - gid_errno = errno ? errno : -1; - - errno = 0; - if (setuid (uid) != 0) - uid_errno = errno ? errno : -1; - - if (uid_errno == 0 && gid_errno == 0 && sgs_errno == 0) - { - static char *reason; - reason = g_strdup_printf ("changed uid/gid to %s/%s (%ld/%ld).", - (p && p->pw_name ? p->pw_name : "???"), - (g && g->gr_name ? g->gr_name : "???"), - (long) uid, (long) gid); - if (message_ret) - *message_ret = g_strdup (reason); - - g_free (reason); - - return TRUE; - } - else - { - char *reason = NULL; - - if (sgs_errno) - { - reason = g_strdup_printf ("couldn't setgroups to %s (%ld)", - (g && g->gr_name ? g->gr_name : "???"), - (long) gid); - if (sgs_errno == -1) - fprintf (stderr, "%s: unknown error\n", reason); - else - { - errno = sgs_errno; - perror (reason); - } - g_free (reason); - reason = NULL; - } - - if (gid_errno) - { - reason = g_strdup_printf ("couldn't set gid to %s (%ld)", - (g && g->gr_name ? g->gr_name : "???"), - (long) gid); - if (gid_errno == -1) - fprintf (stderr, "%s: unknown error\n", reason); - else - { - errno = gid_errno; - perror (reason); - } - g_free (reason); - reason = NULL; - } - - if (uid_errno) - { - reason = g_strdup_printf ("couldn't set uid to %s (%ld)", - (p && p->pw_name ? p->pw_name : "???"), - (long) uid); - if (uid_errno == -1) - fprintf (stderr, "%s: unknown error\n", reason); - else - { - errno = uid_errno; - perror (reason); - } - g_free (reason); - reason = NULL; - } - return FALSE; - } - return FALSE; -} - - -/* If we've been run as setuid or setgid to someone else (most likely root) - turn off the extra permissions so that random user-specified programs - don't get special privileges. (On some systems it is necessary to install - this program as setuid root in order to read the passwd file to implement - lock-mode.) - - *** WARNING: DO NOT DISABLE ANY OF THE FOLLOWING CODE! - If you do so, you will open a security hole. See the sections - of the xscreensaver manual titled "LOCKING AND ROOT LOGINS", - and "USING XDM". -*/ - -/* Returns TRUE if OK to lock, FALSE otherwise */ -gboolean -hack_uid (char **nolock_reason, - char **orig_uid, - char **uid_message) -{ - char *reason; - gboolean ret; - - ret = TRUE; - reason = NULL; - - if (nolock_reason != NULL) - { - *nolock_reason = NULL; - } - if (orig_uid != NULL) - { - *orig_uid = NULL; - } - if (uid_message != NULL) - { - *uid_message = NULL; - } - - /* Discard privileges, and set the effective user/group ids to the - real user/group ids. That is, give up our "chmod +s" rights. - */ - { - uid_t euid = geteuid (); - gid_t egid = getegid (); - uid_t uid = getuid (); - gid_t gid = getgid (); - - if (orig_uid != NULL) - { - *orig_uid = uid_gid_string (euid, egid); - } - - if (uid != euid || gid != egid) - { - if (! set_ids_by_number (uid, gid, uid_message)) - { - reason = g_strdup ("unable to discard privileges."); - - ret = FALSE; - goto out; - } - } - } - - - /* Locking can't work when running as root, because we have no way of - knowing what the user id of the logged in user is (so we don't know - whose password to prompt for.) - - *** WARNING: DO NOT DISABLE THIS CODE! - If you do so, you will open a security hole. See the sections - of the xscreensaver manual titled "LOCKING AND ROOT LOGINS", - and "USING XDM". - */ - if (getuid () == (uid_t) 0) - { - reason = g_strdup ("running as root"); - ret = FALSE; - goto out; - } - -out: - if (nolock_reason != NULL) - { - *nolock_reason = g_strdup (reason); - } - g_free (reason); - - return ret; -} -- cgit v1.2.1