[svn-upgrade] Integrating new upstream version, shadow (19990709)
This commit is contained in:
nekral-guest
549
src/groupmod.c
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549
src/groupmod.c
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@@ -0,0 +1,549 @@
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/*
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* Copyright 1991 - 1994, Julianne Frances Haugh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "rcsid.h"
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RCSID(PKG_VER "$Id: groupmod.c,v 1.12 1999/07/09 18:02:43 marekm Exp $")
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#include <sys/types.h>
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#include <stdio.h>
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#include <grp.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include "prototypes.h"
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#include "chkname.h"
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#include "defines.h"
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#include "groupio.h"
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#ifdef SHADOWGRP
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#include "sgroupio.h"
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static int is_shadow_grp;
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#endif
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/*
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* exit status values
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*/
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#define E_SUCCESS 0 /* success */
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#define E_USAGE 2 /* invalid command syntax */
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#define E_BAD_ARG 3 /* invalid argument to option */
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#define E_GID_IN_USE 4 /* gid already in use (and no -o) */
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#define E_NOTFOUND 6 /* specified group doesn't exist */
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#define E_NAME_IN_USE 9 /* group name already in use */
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#define E_GRP_UPDATE 10 /* can't update group file */
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static char *group_name;
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static char *group_newname;
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static gid_t group_id;
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static gid_t group_newid;
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static char *Prog;
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static int
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oflg = 0, /* permit non-unique group ID to be specified with -g */
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gflg = 0, /* new ID value for the group */
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nflg = 0; /* a new name has been specified for the group */
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#ifdef NDBM
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extern int gr_dbm_mode;
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extern int sg_dbm_mode;
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#endif
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extern int optind;
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extern char *optarg;
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/* local function prototypes */
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static void usage P_((void));
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static void new_grent P_((struct group *));
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#ifdef SHADOWGRP
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static void new_sgent P_((struct sgrp *));
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#endif
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static void grp_update P_((void));
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static void check_new_gid P_((void));
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static void check_new_name P_((void));
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static void process_flags P_((int, char **));
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static void close_files P_((void));
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static void open_files P_((void));
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int main P_((int, char **));
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/*
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* usage - display usage message and exit
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*/
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static void
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usage(void)
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{
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fprintf(stderr, _("usage: groupmod [-g gid [-o]] [-n name] group\n"));
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exit(E_USAGE);
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}
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/*
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* new_grent - updates the values in a group file entry
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*
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* new_grent() takes all of the values that have been entered and
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* fills in a (struct group) with them.
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*/
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static void
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new_grent(struct group *grent)
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{
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if (nflg)
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grent->gr_name = xstrdup (group_newname);
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if (gflg)
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grent->gr_gid = group_newid;
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}
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#ifdef SHADOWGRP
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/*
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* new_sgent - updates the values in a shadow group file entry
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*
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* new_sgent() takes all of the values that have been entered and
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* fills in a (struct sgrp) with them.
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*/
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static void
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new_sgent(struct sgrp *sgent)
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{
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if (nflg)
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sgent->sg_name = xstrdup (group_newname);
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}
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#endif /* SHADOWGRP */
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/*
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* grp_update - update group file entries
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*
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* grp_update() writes the new records to the group files.
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*/
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static void
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grp_update(void)
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{
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struct group grp;
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const struct group *ogrp;
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#ifdef SHADOWGRP
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struct sgrp sgrp;
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const struct sgrp *osgrp = NULL;
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#endif /* SHADOWGRP */
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/*
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* Get the current settings for this group.
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*/
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ogrp = gr_locate(group_name);
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if (!ogrp) {
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fprintf(stderr,
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_("%s: %s not found in /etc/group\n"),
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Prog, group_name);
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exit(E_GRP_UPDATE);
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}
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grp = *ogrp;
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new_grent (&grp);
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#ifdef SHADOWGRP
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if (is_shadow_grp && (osgrp = sgr_locate(group_name))) {
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sgrp = *osgrp;
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new_sgent (&sgrp);
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}
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#endif /* SHADOWGRP */
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/*
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* Write out the new group file entry.
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*/
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if (!gr_update(&grp)) {
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fprintf(stderr, _("%s: error adding new group entry\n"), Prog);
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exit(E_GRP_UPDATE);
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}
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if (nflg && !gr_remove(group_name)) {
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fprintf(stderr, _("%s: error removing group entry\n"), Prog);
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exit(E_GRP_UPDATE);
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}
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#ifdef NDBM
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/*
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* Update the DBM group file with the new entry as well.
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*/
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if (gr_dbm_present()) {
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if (!gr_dbm_update(&grp)) {
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fprintf(stderr,
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_("%s: cannot add new dbm group entry\n"),
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Prog);
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exit(E_GRP_UPDATE);
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}
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if (nflg && (ogrp = getgrnam(group_name)) &&
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!gr_dbm_remove(ogrp)) {
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fprintf(stderr,
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_("%s: error removing group dbm entry\n"),
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Prog);
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exit(E_GRP_UPDATE);
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}
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endgrent ();
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}
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#endif /* NDBM */
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#ifdef SHADOWGRP
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/*
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* Make sure there was a shadow entry to begin with. Skip
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* down to "out" if there wasn't. Can't just return because
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* there might be some syslogging to do.
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*/
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if (! osgrp)
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goto out;
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/*
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* Write out the new shadow group entries as well.
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*/
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if (!sgr_update(&sgrp)) {
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fprintf(stderr, _("%s: error adding new group entry\n"), Prog);
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exit(E_GRP_UPDATE);
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}
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if (nflg && !sgr_remove(group_name)) {
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fprintf(stderr, _("%s: error removing group entry\n"), Prog);
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exit(E_GRP_UPDATE);
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}
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#ifdef NDBM
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/*
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* Update the DBM shadow group file with the new entry as well.
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*/
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if (sg_dbm_present()) {
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if (!sg_dbm_update(&sgrp)) {
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fprintf(stderr,
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_("%s: cannot add new dbm shadow group entry\n"),
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Prog);
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exit(E_GRP_UPDATE);
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}
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if (nflg && ! sg_dbm_remove (group_name)) {
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fprintf (stderr,
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_("%s: error removing shadow group dbm entry\n"),
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Prog);
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exit(E_GRP_UPDATE);
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}
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endsgent ();
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}
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#endif /* NDBM */
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out:
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#endif /* SHADOWGRP */
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if (nflg)
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SYSLOG((LOG_INFO, "change group `%s' to `%s'\n",
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group_name, group_newname));
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if (gflg)
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SYSLOG((LOG_INFO, "change gid for `%s' to %d\n",
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nflg ? group_newname:group_name, group_newid));
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}
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/*
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* check_new_gid - check the new GID value for uniqueness
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*
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* check_new_gid() insures that the new GID value is unique.
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*/
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static void
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check_new_gid(void)
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{
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/*
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* First, the easy stuff. If the ID can be duplicated, or if
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* the ID didn't really change, just return. If the ID didn't
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* change, turn off those flags. No sense doing needless work.
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*/
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if (group_id == group_newid) {
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gflg = 0;
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return;
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}
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if (oflg || ! getgrgid (group_newid))
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return;
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/*
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* Tell the user what they did wrong.
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*/
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fprintf(stderr,
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_("%s: %ld is not a unique gid\n"),
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Prog, (long) group_newid);
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exit(E_GID_IN_USE);
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}
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/*
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* check_new_name - check the new name for uniqueness
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*
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* check_new_name() insures that the new name does not exist
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* already. You can't have the same name twice, period.
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*/
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static void
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check_new_name(void)
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{
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/*
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* Make sure they are actually changing the name.
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*/
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if (strcmp(group_name, group_newname) == 0) {
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nflg = 0;
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return;
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}
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if (check_group_name(group_newname)) {
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/*
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* If the entry is found, too bad.
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*/
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if (getgrnam(group_newname)) {
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fprintf(stderr, _("%s: %s is not a unique name\n"),
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Prog, group_newname);
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exit(E_NAME_IN_USE);
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}
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return;
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}
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/*
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* All invalid group names land here.
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*/
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fprintf(stderr, _("%s: %s is a not a valid group name\n"),
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Prog, group_newname);
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exit(E_BAD_ARG);
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}
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/*
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* process_flags - perform command line argument setting
|
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*
|
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* process_flags() interprets the command line arguments and sets
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* the values that the user will be created with accordingly. The
|
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* values are checked for sanity.
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*/
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static void
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process_flags(int argc, char **argv)
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{
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char *end;
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int arg;
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||||
|
||||
while ((arg = getopt (argc, argv, "og:n:")) != EOF) {
|
||||
switch (arg) {
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||||
case 'g':
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||||
gflg++;
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||||
group_newid = strtol(optarg, &end, 10);
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if (*end != '\0') {
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fprintf(stderr,
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||||
_("%s: invalid group %s\n"),
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Prog, optarg);
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||||
exit(E_BAD_ARG);
|
||||
}
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break;
|
||||
case 'n':
|
||||
nflg++;
|
||||
group_newname = optarg;
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||||
break;
|
||||
case 'o':
|
||||
oflg++;
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||||
break;
|
||||
default:
|
||||
usage ();
|
||||
}
|
||||
}
|
||||
if (oflg && !gflg)
|
||||
usage();
|
||||
|
||||
if (optind != argc - 1)
|
||||
usage();
|
||||
|
||||
group_name = argv[argc - 1];
|
||||
}
|
||||
|
||||
/*
|
||||
* 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);
|
||||
exit(E_GRP_UPDATE);
|
||||
}
|
||||
gr_unlock();
|
||||
#ifdef SHADOWGRP
|
||||
if (is_shadow_grp && !sgr_close()) {
|
||||
fprintf(stderr, _("%s: cannot rewrite shadow group file\n"),
|
||||
Prog);
|
||||
exit(E_GRP_UPDATE);
|
||||
}
|
||||
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 */
|
||||
}
|
||||
|
||||
/*
|
||||
* main - groupmod command
|
||||
*
|
||||
* The syntax of the groupmod command is
|
||||
*
|
||||
* groupmod [ -g gid [ -o ]] [ -n name ] group
|
||||
*
|
||||
* The flags are
|
||||
* -g - specify a new group ID value
|
||||
* -o - permit the group ID value to be non-unique
|
||||
* -n - specify a new group name
|
||||
*/
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
struct group *grp;
|
||||
|
||||
/*
|
||||
* Get my name so that I can use it to report errors.
|
||||
*/
|
||||
|
||||
Prog = Basename(argv[0]);
|
||||
|
||||
setlocale(LC_ALL, "");
|
||||
bindtextdomain(PACKAGE, LOCALEDIR);
|
||||
textdomain(PACKAGE);
|
||||
|
||||
openlog(Prog, LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_AUTH);
|
||||
|
||||
#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 */
|
||||
process_flags (argc, argv);
|
||||
|
||||
/*
|
||||
* 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);
|
||||
} else
|
||||
group_id = grp->gr_gid;
|
||||
|
||||
#ifdef USE_NIS
|
||||
|
||||
/*
|
||||
* Now make sure it isn't an 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
|
||||
|
||||
if (gflg)
|
||||
check_new_gid ();
|
||||
|
||||
if (nflg)
|
||||
check_new_name ();
|
||||
|
||||
/*
|
||||
* Do the hard stuff - open the files, create the group entries,
|
||||
* then close and update the files.
|
||||
*/
|
||||
|
||||
open_files ();
|
||||
|
||||
grp_update ();
|
||||
|
||||
close_files ();
|
||||
exit(E_SUCCESS);
|
||||
/*NOTREACHED*/
|
||||
}
|
||||
Reference in New Issue
Block a user