[svn-upgrade] Integrating new upstream version, shadow (19990709)
This commit is contained in:
nekral-guest
538
src/groupadd.c
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538
src/groupadd.c
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@ -0,0 +1,538 @@
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/*
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* Copyright 1991 - 1993, 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: groupadd.c,v 1.14 1999/06/07 16:40:45 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 "defines.h"
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#include "prototypes.h"
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#include "chkname.h"
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#include "getdef.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 not unique (when -o not used) */
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#define E_NAME_IN_USE 9 /* group name nut unique */
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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 gid_t group_id;
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static char *empty_list = NULL;
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static char *Prog;
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static int oflg = 0; /* permit non-unique group ID to be specified with -g */
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static int gflg = 0; /* ID value for the new group */
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static int fflg = 0; /* if group already exists, do nothing and exit(0) */
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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 find_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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static void fail_exit P_((int));
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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: groupadd [-g gid [-o]] group\n"));
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exit(E_USAGE);
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}
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/*
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* new_grent - initialize 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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memzero(grent, sizeof *grent);
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grent->gr_name = group_name;
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grent->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
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grent->gr_gid = group_id;
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grent->gr_mem = &empty_list;
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}
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#ifdef SHADOWGRP
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/*
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* new_sgent - initialize 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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memzero(sgent, sizeof *sgent);
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sgent->sg_name = group_name;
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sgent->sg_passwd = "!"; /* XXX warning: const */
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sgent->sg_adm = &empty_list;
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sgent->sg_mem = &empty_list;
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}
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#endif /* SHADOWGRP */
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/*
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* grp_update - add new 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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#ifdef SHADOWGRP
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struct sgrp sgrp;
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#endif /* SHADOWGRP */
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/*
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* Create the initial entries for this new group.
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*/
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new_grent (&grp);
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#ifdef SHADOWGRP
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new_sgent (&sgrp);
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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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fail_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() && ! gr_dbm_update (&grp)) {
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fprintf(stderr, _("%s: cannot add new dbm group entry\n"), Prog);
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fail_exit(E_GRP_UPDATE);
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}
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endgrent ();
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#endif /* NDBM */
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#ifdef SHADOWGRP
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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 (is_shadow_grp && ! sgr_update (&sgrp)) {
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fprintf(stderr, _("%s: error adding new group entry\n"), Prog);
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fail_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 (is_shadow_grp && sg_dbm_present() && ! sg_dbm_update (&sgrp)) {
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fprintf(stderr, _("%s: cannot add new dbm group entry\n"), Prog);
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fail_exit(E_GRP_UPDATE);
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}
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endsgent ();
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#endif /* NDBM */
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#endif /* SHADOWGRP */
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SYSLOG((LOG_INFO, "new group: name=%s, gid=%d\n",
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group_name, group_id));
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}
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/*
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* find_new_gid - find the next available GID
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*
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* find_new_gid() locates the next highest unused GID in the group
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* file, or checks the given group ID against the existing ones for
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* uniqueness.
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*/
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static void
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find_new_gid(void)
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{
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const struct group *grp;
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gid_t gid_min, gid_max;
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gid_min = getdef_num("GID_MIN", 100);
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gid_max = getdef_num("GID_MAX", 60000);
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/*
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* Start with some GID value if the user didn't provide us with
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* one already.
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*/
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if (! gflg)
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group_id = gid_min;
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/*
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* Search the entire group file, either looking for this
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* GID (if the user specified one with -g) or looking for the
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* largest unused value.
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*/
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#ifdef NO_GETGRENT
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gr_rewind();
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while ((grp = gr_next())) {
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#else
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setgrent();
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while ((grp = getgrent())) {
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#endif
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if (strcmp(group_name, grp->gr_name) == 0) {
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if (fflg) {
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fail_exit(E_SUCCESS);
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}
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fprintf(stderr, _("%s: name %s is not unique\n"),
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Prog, group_name);
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fail_exit(E_NAME_IN_USE);
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}
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if (gflg && group_id == grp->gr_gid) {
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if (fflg) {
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/* turn off -g and search again */
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gflg = 0;
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#ifdef NO_GETGRENT
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gr_rewind();
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#else
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setgrent();
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#endif
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continue;
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}
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fprintf(stderr, _("%s: gid %ld is not unique\n"),
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Prog, (long) group_id);
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fail_exit(E_GID_IN_USE);
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}
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if (! gflg && grp->gr_gid >= group_id) {
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if (grp->gr_gid > gid_max)
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continue;
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group_id = grp->gr_gid + 1;
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}
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}
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if (!gflg && group_id == gid_max + 1) {
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for (group_id = gid_min; group_id < gid_max; group_id++) {
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#ifdef NO_GETGRENT
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gr_rewind();
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while ((grp = gr_next()) && grp->gr_gid != group_id)
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;
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if (!grp)
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break;
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#else
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if (!getgrgid(group_id))
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break;
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#endif
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}
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if (group_id == gid_max) {
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fprintf(stderr, _("%s: can't get unique gid\n"),
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Prog);
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fail_exit(E_GID_IN_USE);
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}
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}
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}
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/*
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* check_new_name - check the new name for validity
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*
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* check_new_name() insures that the new name doesn't contain
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* any illegal characters.
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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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if (check_group_name(group_name))
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return;
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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_name);
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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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* 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 *cp;
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int arg;
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while ((arg = getopt(argc, argv, "og:O:f")) != EOF) {
|
||||
switch (arg) {
|
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case 'g':
|
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gflg++;
|
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if (! isdigit (optarg[0]))
|
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usage ();
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group_id = strtol(optarg, &cp, 10);
|
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if (*cp != '\0') {
|
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fprintf(stderr, _("%s: invalid group %s\n"),
|
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Prog, optarg);
|
||||
fail_exit(E_BAD_ARG);
|
||||
}
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break;
|
||||
case 'o':
|
||||
oflg++;
|
||||
break;
|
||||
case 'O':
|
||||
/*
|
||||
* override login.defs defaults (-O name=value)
|
||||
* example: -O GID_MIN=100 -O GID_MAX=499
|
||||
* note: -O GID_MIN=10,GID_MAX=499 doesn't work yet
|
||||
*/
|
||||
cp = strchr(optarg, '=');
|
||||
if (!cp) {
|
||||
fprintf(stderr,
|
||||
_("%s: -O requires NAME=VALUE\n"),
|
||||
Prog);
|
||||
exit(E_BAD_ARG);
|
||||
}
|
||||
/* terminate name, point to value */
|
||||
*cp++ = '\0';
|
||||
if (putdef_str(optarg, cp) < 0)
|
||||
exit(E_BAD_ARG);
|
||||
break;
|
||||
case 'f':
|
||||
/*
|
||||
* "force" - do nothing, just exit(0), if the
|
||||
* specified group already exists. With -g, if
|
||||
* specified gid already exists, choose another
|
||||
* (unique) gid (turn off -g). Based on the
|
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* RedHat's patch from shadow-utils-970616-9.
|
||||
*/
|
||||
fflg++;
|
||||
break;
|
||||
default:
|
||||
usage();
|
||||
}
|
||||
}
|
||||
|
||||
if (oflg && !gflg)
|
||||
usage();
|
||||
|
||||
if (optind != argc - 1)
|
||||
usage();
|
||||
|
||||
group_name = argv[argc - 1];
|
||||
check_new_name();
|
||||
}
|
||||
|
||||
/*
|
||||
* 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);
|
||||
fail_exit(E_GRP_UPDATE);
|
||||
}
|
||||
gr_unlock();
|
||||
#ifdef SHADOWGRP
|
||||
if (is_shadow_grp && !sgr_close()) {
|
||||
fprintf(stderr, _("%s: cannot rewrite shadow group file\n"),
|
||||
Prog);
|
||||
fail_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);
|
||||
fail_exit(E_GRP_UPDATE);
|
||||
}
|
||||
#ifdef SHADOWGRP
|
||||
if (is_shadow_grp && ! sgr_lock ()) {
|
||||
fprintf(stderr, _("%s: unable to lock shadow group file\n"),
|
||||
Prog);
|
||||
fail_exit(E_GRP_UPDATE);
|
||||
}
|
||||
if (is_shadow_grp && ! sgr_open (O_RDWR)) {
|
||||
fprintf(stderr, _("%s: unable to open shadow group file\n"),
|
||||
Prog);
|
||||
fail_exit(E_GRP_UPDATE);
|
||||
}
|
||||
#endif /* SHADOWGRP */
|
||||
}
|
||||
|
||||
/*
|
||||
* fail_exit - exit with an error code after unlocking files
|
||||
*/
|
||||
|
||||
static void
|
||||
fail_exit(int code)
|
||||
{
|
||||
(void) gr_unlock ();
|
||||
#ifdef SHADOWGRP
|
||||
if (is_shadow_grp)
|
||||
sgr_unlock ();
|
||||
#endif
|
||||
exit (code);
|
||||
}
|
||||
|
||||
/*
|
||||
* main - groupadd command
|
||||
*/
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
|
||||
/*
|
||||
* 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 (getgrnam(group_name)) {
|
||||
if (fflg) {
|
||||
exit(E_SUCCESS);
|
||||
}
|
||||
fprintf(stderr, _("%s: group %s exists\n"), Prog, group_name);
|
||||
exit(E_NAME_IN_USE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Do the hard stuff - open the files, create the group entries,
|
||||
* then close and update the files.
|
||||
*/
|
||||
|
||||
open_files();
|
||||
|
||||
if (!gflg || !oflg)
|
||||
find_new_gid();
|
||||
|
||||
grp_update();
|
||||
|
||||
close_files();
|
||||
exit(E_SUCCESS);
|
||||
/*NOTREACHED*/
|
||||
}
|
||||
Reference in New Issue
Block a user