/* * Copyright 1991 - 1994, Julianne Frances Haugh * 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. Neither the name of Julianne F. Haugh nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH 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 JULIE HAUGH 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 #include "rcsid.h" RCSID (PKG_VER "$Id: groupdel.c,v 1.17 2003/06/19 18:11:01 kloczek Exp $") #include #include #include #include #include #include #ifdef USE_PAM #include #include #include #endif /* USE_PAM */ #include "nscd.h" #include "prototypes.h" #include "defines.h" static char *group_name; static char *Prog; static int errors; #ifdef NDBM extern int gr_dbm_mode; extern int sg_dbm_mode; #endif #include "groupio.h" #ifdef SHADOWGRP #include "sgroupio.h" static int is_shadow_grp; #endif /* * exit status values */ #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 void usage (void); static void grp_update (void); static void close_files (void); static void open_files (void); static void group_busy (gid_t); /* * usage - display usage message and exit */ static void usage (void) { fprintf (stderr, _("Usage: groupdel group\n")); exit (E_USAGE); } /* * grp_update - update group file entries * * grp_update() writes the new records to the group files. */ static void grp_update (void) { #ifdef NDBM struct group *ogrp; #endif if (!gr_remove (group_name)) { fprintf (stderr, _("%s: error removing group entry\n"), Prog); errors++; } #ifdef NDBM /* * Update the DBM group file */ if (gr_dbm_present ()) { if ((ogrp = getgrnam (group_name)) && !gr_dbm_remove (ogrp)) { fprintf (stderr, _("%s: error removing group dbm entry\n"), Prog); errors++; } } endgrent (); #endif /* NDBM */ #ifdef SHADOWGRP /* * Delete the shadow group entries as well. */ if (is_shadow_grp && !sgr_remove (group_name)) { fprintf (stderr, _("%s: error removing shadow group entry\n"), Prog); errors++; } #ifdef NDBM /* * Update the DBM shadow group file */ if (is_shadow_grp && sg_dbm_present ()) { if (!sg_dbm_remove (group_name)) { fprintf (stderr, _ ("%s: error removing shadow group dbm entry\n"), Prog); errors++; } } endsgent (); #endif /* NDBM */ #endif /* SHADOWGRP */ SYSLOG ((LOG_INFO, "remove group `%s'\n", group_name)); return; } /* * 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) { if (!gr_close ()) { fprintf (stderr, _("%s: cannot rewrite group file\n"), Prog); errors++; } gr_unlock (); #ifdef SHADOWGRP if (is_shadow_grp && !sgr_close ()) { fprintf (stderr, _("%s: cannot rewrite shadow group file\n"), Prog); errors++; } if (is_shadow_grp) sgr_unlock (); #endif /* SHADOWGRP */ } /* * open_files - lock and open the group files * * open_files() opens the two group files. */ static void open_files (void) { if (!gr_lock ()) { fprintf (stderr, _("%s: unable to lock group file\n"), Prog); exit (E_GRP_UPDATE); } if (!gr_open (O_RDWR)) { fprintf (stderr, _("%s: unable to open group file\n"), Prog); exit (E_GRP_UPDATE); } #ifdef SHADOWGRP if (is_shadow_grp && !sgr_lock ()) { fprintf (stderr, _("%s: unable to lock shadow group file\n"), Prog); exit (E_GRP_UPDATE); } if (is_shadow_grp && !sgr_open (O_RDWR)) { fprintf (stderr, _("%s: unable to open shadow group file\n"), Prog); 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 ()) && pwd->pw_gid != gid); endpwent (); /* * If pwd isn't NULL, it stopped becaues the gid's matched. */ if (pwd == (struct passwd *) 0) return; /* * Can't remove the group. */ fprintf (stderr, _("%s: cannot remove user's primary group.\n"), Prog); exit (E_GROUP_BUSY); } #ifdef USE_PAM static struct pam_conv conv = { misc_conv, NULL }; #endif /* USE_PAM */ /* * main - groupdel command * * The syntax of the groupdel command is * * groupdel group * * The named group will be deleted. */ int main (int argc, char **argv) { struct group *grp; #ifdef USE_PAM pam_handle_t *pamh = NULL; struct passwd *pampw; int retval; #endif /* * Get my name so that I can use it to report errors. */ Prog = Basename (argv[0]); setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); #ifdef USE_PAM retval = PAM_SUCCESS; pampw = getpwuid (getuid ()); if (pampw == NULL) { retval = PAM_USER_UNKNOWN; } if (retval == PAM_SUCCESS) { retval = pam_start ("shadow", pampw->pw_name, &conv, &pamh); } if (retval == PAM_SUCCESS) { retval = pam_authenticate (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval == PAM_SUCCESS) { retval = pam_acct_mgmt (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval != PAM_SUCCESS) { fprintf (stderr, _("%s: PAM authentication failed\n"), Prog); exit (1); } #endif /* USE_PAM */ if (argc != 2) usage (); group_name = argv[1]; OPENLOG (Prog); #ifdef SHADOWGRP is_shadow_grp = sgr_file_present (); #endif /* * The open routines for the DBM files don't use read-write * as the mode, so we have to clue them in. */ #ifdef NDBM gr_dbm_mode = O_RDWR; #ifdef SHADOWGRP sg_dbm_mode = O_RDWR; #endif /* SHADOWGRP */ #endif /* NDBM */ /* * Start with a quick check to see if the group exists. */ if (!(grp = getgrnam (group_name))) { fprintf (stderr, _("%s: group %s does not exist\n"), Prog, group_name); exit (E_NOTFOUND); } #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 /* * Now check to insure that this isn't the primary group of * anyone. */ group_busy (grp->gr_gid); /* * Do the hard stuff - open the files, delete the group entries, * then close and update the files. */ open_files (); grp_update (); nscd_flush_cache ("group"); close_files (); #ifdef USE_PAM if (retval == PAM_SUCCESS) { retval = pam_chauthtok (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval != PAM_SUCCESS) { fprintf (stderr, _("%s: PAM chauthtok failed\n"), Prog); exit (1); } if (retval == PAM_SUCCESS) pam_end (pamh, PAM_SUCCESS); #endif /* USE_PAM */ exit (errors == 0 ? E_SUCCESS : E_GRP_UPDATE); /* NOT REACHED */ }