Adding upstream version 1:4.5.upstream/1%4.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 491 insertions, 0 deletions

diff --git a/src/groupdel.c b/src/groupdel.c
new file mode 100644
index 0000000..11e522b
--- /dev/null
+++ b/src/groupdel.c
@@ -0,0 +1,491 @@
+/*
+ * Copyright (c) 1991 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2000 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2011, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <pwd.h>
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+#include "pam_defs.h"
+#endif				/* USE_PAM */
+#endif				/* ACCT_TOOLS_SETUID */
+#include <stdio.h>
+#include <sys/types.h>
+#include <getopt.h>
+#include "defines.h"
+#include "groupio.h"
+#include "nscd.h"
+#include "prototypes.h"
+#ifdef	SHADOWGRP
+#include "sgroupio.h"
+#endif
+/*
+ * Global variables
+ */
+const char *Prog;
+
+static char *group_name;
+static gid_t group_id = -1;
+static bool check_group_busy = true;
+
+#ifdef	SHADOWGRP
+static bool is_shadow_grp;
+#endif
+
+/*
+ * exit status values
+ */
+/*@-exitarg@*/
+#define E_SUCCESS	0	/* success */
+#define E_USAGE		2	/* invalid command syntax */
+#define E_NOTFOUND	6	/* specified group doesn't exist */
+#define E_GROUP_BUSY	8	/* can't remove user's primary group */
+#define E_GRP_UPDATE	10	/* can't update group file */
+
+/* local function prototypes */
+static /*@noreturn@*/void usage (int status);
+static void grp_update (void);
+static void close_files (void);
+static void open_files (void);
+static void group_busy (gid_t gid);
+static void process_flags (int argc, char **argv);
+
+/*
+ * usage - display usage message and exit
+ */
+static /*@noreturn@*/void usage (int status)
+{
+	FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+	(void) fprintf (usageout,
+	                _("Usage: %s [options] GROUP\n"
+	                  "\n"
+	                  "Options:\n"),
+	                Prog);
+	(void) fputs (_("  -h, --help                    display this help message and exit\n"), usageout);
+	(void) fputs (_("  -R, --root CHROOT_DIR         directory to chroot into\n"), usageout);
+	(void) fputs (_("  -f, --force                   delete group even if it is the primary group of a user\n"), usageout);
+	(void) fputs ("\n", usageout);
+	exit (status);
+}
+
+/*
+ * grp_update - update group file entries
+ *
+ *	grp_update() writes the new records to the group files.
+ */
+static void grp_update (void)
+{
+	/*
+	 * To add the group, we need to update /etc/group.
+	 * Make sure failures will be reported.
+	 */
+	add_cleanup (cleanup_report_del_group_group, group_name);
+#ifdef	SHADOWGRP
+	if (is_shadow_grp) {
+		/* We also need to update /etc/gshadow */
+		add_cleanup (cleanup_report_del_group_gshadow, group_name);
+	}
+#endif
+
+	/*
+	 * Delete the group entry.
+	 */
+	if (gr_remove (group_name) == 0) {
+		fprintf (stderr,
+		         _("%s: cannot remove entry '%s' from %s\n"),
+		         Prog, group_name, gr_dbname ());
+		exit (E_GRP_UPDATE);
+	}
+
+#ifdef	SHADOWGRP
+	/*
+	 * Delete the shadow group entries as well.
+	 */
+	if (is_shadow_grp && (sgr_locate (group_name) != NULL)) {
+		if (sgr_remove (group_name) == 0) {
+			fprintf (stderr,
+			         _("%s: cannot remove entry '%s' from %s\n"),
+			         Prog, group_name, sgr_dbname ());
+			exit (E_GRP_UPDATE);
+		}
+	}
+#endif				/* SHADOWGRP */
+}
+
+/*
+ * close_files - close all of the files that were opened
+ *
+ *	close_files() closes all of the files that were opened for this
+ *	new group.  This causes any modified entries to be written out.
+ */
+static void close_files (void)
+{
+	/* First, write the changes in the regular group database */
+	if (gr_close () == 0) {
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, gr_dbname ());
+		exit (E_GRP_UPDATE);
+	}
+
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_DEL_GROUP, Prog,
+	              "removing group from /etc/group",
+	              group_name, (unsigned int) group_id,
+	              SHADOW_AUDIT_SUCCESS);
+#endif
+	SYSLOG ((LOG_INFO,
+	         "group '%s' removed from %s",
+	         group_name, gr_dbname ()));
+	del_cleanup (cleanup_report_del_group_group);
+
+	cleanup_unlock_group (NULL);
+	del_cleanup (cleanup_unlock_group);
+
+
+	/* Then, write the changes in the shadow database */
+#ifdef	SHADOWGRP
+	if (is_shadow_grp) {
+		if (sgr_close () == 0) {
+			fprintf (stderr,
+			         _("%s: failure while writing changes to %s\n"),
+			         Prog, sgr_dbname ());
+			exit (E_GRP_UPDATE);
+		}
+
+#ifdef WITH_AUDIT
+		audit_logger (AUDIT_DEL_GROUP, Prog,
+		              "removing group from /etc/gshadow",
+		              group_name, (unsigned int) group_id,
+		              SHADOW_AUDIT_SUCCESS);
+#endif
+		SYSLOG ((LOG_INFO,
+		         "group '%s' removed from %s",
+		         group_name, sgr_dbname ()));
+		del_cleanup (cleanup_report_del_group_gshadow);
+
+		cleanup_unlock_gshadow (NULL);
+		del_cleanup (cleanup_unlock_gshadow);
+	}
+#endif				/* SHADOWGRP */
+
+	/* Report success at the system level */
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_DEL_GROUP, Prog,
+	              "",
+	              group_name, (unsigned int) group_id,
+	              SHADOW_AUDIT_SUCCESS);
+#endif
+	SYSLOG ((LOG_INFO, "group '%s' removed\n", group_name));
+	del_cleanup (cleanup_report_del_group);
+}
+
+/*
+ * open_files - lock and open the group files
+ *
+ *	open_files() opens the two group files.
+ */
+static void open_files (void)
+{
+	/* First, lock the databases */
+	if (gr_lock () == 0) {
+		fprintf (stderr,
+		         _("%s: cannot lock %s; try again later.\n"),
+		         Prog, gr_dbname ());
+		exit (E_GRP_UPDATE);
+	}
+	add_cleanup (cleanup_unlock_group, NULL);
+#ifdef	SHADOWGRP
+	if (is_shadow_grp) {
+		if (sgr_lock () == 0) {
+			fprintf (stderr,
+			         _("%s: cannot lock %s; try again later.\n"),
+			         Prog, sgr_dbname ());
+			exit (E_GRP_UPDATE);
+		}
+		add_cleanup (cleanup_unlock_gshadow, NULL);
+	}
+#endif
+
+	/*
+	 * Now, if the group is not removed, it's our fault.
+	 * Make sure failures will be reported.
+	 */
+	add_cleanup (cleanup_report_del_group, group_name);
+
+	/* An now open the databases */
+	if (gr_open (O_CREAT | O_RDWR) == 0) {
+		fprintf (stderr,
+		         _("%s: cannot open %s\n"),
+		         Prog, gr_dbname ());
+		SYSLOG ((LOG_WARN, "cannot open %s", gr_dbname ()));
+		exit (E_GRP_UPDATE);
+	}
+#ifdef	SHADOWGRP
+	if (is_shadow_grp) {
+		if (sgr_open (O_CREAT | O_RDWR) == 0) {
+			fprintf (stderr,
+			         _("%s: cannot open %s\n"),
+			         Prog, sgr_dbname ());
+			SYSLOG ((LOG_WARN, "cannot open %s", sgr_dbname ()));
+			exit (E_GRP_UPDATE);
+		}
+	}
+#endif				/* SHADOWGRP */
+}
+
+/*
+ * group_busy - check if this is any user's primary group
+ *
+ *	group_busy verifies that this group is not the primary group
+ *	for any user.  You must remove all users before you remove
+ *	the group.
+ */
+static void group_busy (gid_t gid)
+{
+	struct passwd *pwd;
+
+	/*
+	 * Nice slow linear search.
+	 */
+
+	setpwent ();
+
+	while ( ((pwd = getpwent ()) != NULL) && (pwd->pw_gid != gid) );
+
+	endpwent ();
+
+	/*
+	 * If pwd isn't NULL, it stopped because the gid's matched.
+	 */
+
+	if (pwd == (struct passwd *) 0) {
+		return;
+	}
+
+	/*
+	 * Can't remove the group.
+	 */
+	fprintf (stderr,
+	         _("%s: cannot remove the primary group of user '%s'\n"),
+	         Prog, pwd->pw_name);
+	exit (E_GROUP_BUSY);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ *	It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int c;
+	static struct option long_options[] = {
+		{"help", no_argument,       NULL, 'h'},
+		{"root", required_argument, NULL, 'R'},
+		{NULL, 0, NULL, '\0'}
+	};
+
+	while ((c = getopt_long (argc, argv, "hfR:",
+	                         long_options, NULL)) != -1) {
+		switch (c) {
+		case 'h':
+			usage (E_SUCCESS);
+			/*@notreached@*/break;
+		case 'R': /* no-op, handled in process_root_flag () */
+			break;
+		case 'f':
+			check_group_busy = false;
+			break;
+		default:
+			usage (E_USAGE);
+		}
+	}
+
+	if (optind != argc - 1) {
+		usage (E_USAGE);
+	}
+	group_name = argv[optind];
+}
+
+/*
+ * main - groupdel command
+ *
+ *	The syntax of the groupdel command is
+ *	
+ *	groupdel group
+ *
+ *	The named group will be deleted.
+ */
+
+int main (int argc, char **argv)
+{
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+	pam_handle_t *pamh = NULL;
+	int retval;
+#endif				/* USE_PAM */
+#endif				/* ACCT_TOOLS_SETUID */
+
+	/*
+	 * Get my name so that I can use it to report errors.
+	 */
+	Prog = Basename (argv[0]);
+
+	(void) setlocale (LC_ALL, "");
+	(void) bindtextdomain (PACKAGE, LOCALEDIR);
+	(void) textdomain (PACKAGE);
+
+	process_root_flag ("-R", argc, argv);
+
+	OPENLOG ("groupdel");
+#ifdef WITH_AUDIT
+	audit_help_open ();
+#endif
+
+	if (atexit (do_cleanups) != 0) {
+		fprintf (stderr,
+		         _("%s: Cannot setup cleanup service.\n"),
+		         Prog);
+		exit (1);
+	}
+
+	process_flags (argc, argv);
+
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+	{
+		struct passwd *pampw;
+		pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+		if (pampw == NULL) {
+			fprintf (stderr,
+			         _("%s: Cannot determine your user name.\n"),
+			         Prog);
+			exit (1);
+		}
+
+		retval = pam_start ("groupdel", pampw->pw_name, &conv, &pamh);
+	}
+
+	if (PAM_SUCCESS == retval) {
+		retval = pam_authenticate (pamh, 0);
+	}
+
+	if (PAM_SUCCESS == retval) {
+		retval = pam_acct_mgmt (pamh, 0);
+	}
+
+	if (PAM_SUCCESS != retval) {
+		fprintf (stderr, _("%s: PAM: %s\n"),
+		         Prog, pam_strerror (pamh, retval));
+		SYSLOG((LOG_ERR, "%s", pam_strerror (pamh, retval)));
+		if (NULL != pamh) {
+			(void) pam_end (pamh, retval);
+		}
+		exit (1);
+	}
+	(void) pam_end (pamh, retval);
+#endif				/* USE_PAM */
+#endif				/* ACCT_TOOLS_SETUID */
+
+#ifdef SHADOWGRP
+	is_shadow_grp = sgr_file_present ();
+#endif
+
+	{
+		struct group *grp;
+		/*
+		 * Start with a quick check to see if the group exists.
+		 */
+		grp = getgrnam (group_name); /* local, no need for xgetgrnam */
+		if (NULL == grp) {
+			fprintf (stderr,
+			         _("%s: group '%s' does not exist\n"),
+			         Prog, group_name);
+			exit (E_NOTFOUND);
+		}
+
+		group_id = grp->gr_gid;
+	}
+
+#ifdef	USE_NIS
+	/*
+	 * Make sure this isn't a NIS group
+	 */
+	if (__isgrNIS ()) {
+		char *nis_domain;
+		char *nis_master;
+
+		fprintf (stderr,
+		         _("%s: group '%s' is a NIS group\n"),
+		         Prog, group_name);
+
+		if (!yp_get_default_domain (&nis_domain) &&
+		    !yp_master (nis_domain, "group.byname", &nis_master)) {
+			fprintf (stderr,
+			         _("%s: %s is the NIS master\n"),
+			         Prog, nis_master);
+		}
+		exit (E_NOTFOUND);
+	}
+#endif
+
+	/*
+	 * Make sure this isn't the primary group of anyone.
+	 */
+	if (check_group_busy) {
+		group_busy (group_id);
+	}
+
+	/*
+	 * Do the hard stuff - open the files, delete the group entries,
+	 * then close and update the files.
+	 */
+	open_files ();
+
+	grp_update ();
+
+	close_files ();
+
+	nscd_flush_cache ("group");
+
+	return E_SUCCESS;
+}
+