331 lines
8.6 KiB
C
331 lines
8.6 KiB
C
/*
|
|
* Copyright (c) 2000 , International Business Machines
|
|
* George Kraft IV, gk4@us.ibm.com, 03/23/2000
|
|
* Copyright (c) 2000 - 2006, Tomasz Kłoczko
|
|
* Copyright (c) 2007 - 2008, 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>
|
|
|
|
#include <fcntl.h>
|
|
#include <getopt.h>
|
|
#include <grp.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#ifdef USE_PAM
|
|
#include "pam_defs.h"
|
|
#endif /* USE_PAM */
|
|
#include <pwd.h>
|
|
#include "defines.h"
|
|
#include "prototypes.h"
|
|
#include "groupio.h"
|
|
|
|
/* Exit Status Values */
|
|
|
|
#define EXIT_SUCCESS 0 /* success */
|
|
#define EXIT_USAGE 1 /* invalid command syntax */
|
|
#define EXIT_GROUP_FILE 2 /* group file access problems */
|
|
#define EXIT_NOT_ROOT 3 /* not superuser */
|
|
#define EXIT_NOT_EROOT 4 /* not effective superuser */
|
|
#define EXIT_NOT_PRIMARY 5 /* not primary owner of group */
|
|
#define EXIT_NOT_MEMBER 6 /* member of group does not exist */
|
|
#define EXIT_MEMBER_EXISTS 7 /* member of group already exists */
|
|
#define EXIT_INVALID_USER 8 /* specified user does not exist */
|
|
#define EXIT_INVALID_GROUP 9 /* specified group does not exist */
|
|
|
|
/*
|
|
* Global variables
|
|
*/
|
|
static char *adduser = NULL;
|
|
static char *deluser = NULL;
|
|
static char *thisgroup = NULL;
|
|
static bool purge = false;
|
|
static bool list = false;
|
|
static int exclusive = 0;
|
|
static char *Prog;
|
|
static bool gr_locked = false;
|
|
|
|
static char *whoami (void);
|
|
static void display_members (char **members);
|
|
static void usage (void);
|
|
static void process_flags (int argc, char **argv);
|
|
static void check_perms (void);
|
|
static void fail_exit (int code);
|
|
#define isroot() (getuid () == 0)
|
|
|
|
static char *whoami (void)
|
|
{
|
|
/* local, no need for xgetgrgid */
|
|
struct group *grp = getgrgid (getgid ());
|
|
/* local, no need for xgetpwuid */
|
|
struct passwd *usr = getpwuid (getuid ());
|
|
|
|
if ( (NULL != usr)
|
|
&& (NULL != grp)
|
|
&& (0 == strcmp (usr->pw_name, grp->gr_name))) {
|
|
return xstrdup (usr->pw_name);
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void display_members (char **members)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; NULL != members[i]; i++) {
|
|
printf ("%s ", members[i]);
|
|
|
|
if (NULL == members[i + 1]) {
|
|
printf ("\n");
|
|
} else {
|
|
printf (" ");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void usage (void)
|
|
{
|
|
(void) fputs (_("Usage: groupmems -a username | -d username | -p | -l [-g groupname]\n"), stderr);
|
|
fail_exit (EXIT_USAGE);
|
|
}
|
|
|
|
/*
|
|
* process_flags - perform command line argument setting
|
|
*/
|
|
static void process_flags (int argc, char **argv)
|
|
{
|
|
int arg;
|
|
int option_index = 0;
|
|
static struct option long_options[] = {
|
|
{"add", required_argument, NULL, 'a'},
|
|
{"delete", required_argument, NULL, 'd'},
|
|
{"group", required_argument, NULL, 'g'},
|
|
{"list", no_argument, NULL, 'l'},
|
|
{"purge", no_argument, NULL, 'p'},
|
|
{NULL, 0, NULL, '\0'}
|
|
};
|
|
|
|
while ((arg = getopt_long (argc, argv, "a:d:g:lp", long_options,
|
|
&option_index)) != EOF) {
|
|
switch (arg) {
|
|
case 'a':
|
|
adduser = xstrdup (optarg);
|
|
++exclusive;
|
|
break;
|
|
case 'd':
|
|
deluser = xstrdup (optarg);
|
|
++exclusive;
|
|
break;
|
|
case 'g':
|
|
thisgroup = xstrdup (optarg);
|
|
break;
|
|
case 'l':
|
|
list = true;
|
|
++exclusive;
|
|
break;
|
|
case 'p':
|
|
purge = true;
|
|
++exclusive;
|
|
break;
|
|
default:
|
|
usage ();
|
|
}
|
|
}
|
|
|
|
if ((exclusive > 1) || (optind < argc)) {
|
|
usage ();
|
|
}
|
|
|
|
/* local, no need for xgetpwnam */
|
|
if ( (NULL != adduser)
|
|
&& (getpwnam (adduser) == NULL)) {
|
|
fprintf (stderr, _("%s: user '%s' does not exist\n"),
|
|
Prog, adduser);
|
|
fail_exit (EXIT_INVALID_USER);
|
|
}
|
|
|
|
}
|
|
|
|
static void check_perms (void)
|
|
{
|
|
#ifdef USE_PAM
|
|
pam_handle_t *pamh = NULL;
|
|
int retval = PAM_SUCCESS;
|
|
struct passwd *pampw;
|
|
|
|
pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
|
|
if (NULL == pampw) {
|
|
retval = PAM_USER_UNKNOWN;
|
|
} else {
|
|
retval = pam_start ("groupmems", pampw->pw_name,
|
|
&conv, &pamh);
|
|
}
|
|
|
|
if (PAM_SUCCESS == retval) {
|
|
retval = pam_authenticate (pamh, 0);
|
|
}
|
|
|
|
if (PAM_SUCCESS == retval) {
|
|
retval = pam_acct_mgmt (pamh, 0);
|
|
}
|
|
|
|
(void) pam_end (pamh, retval);
|
|
if (PAM_SUCCESS != retval) {
|
|
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
|
|
fail_exit (1);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void fail_exit (int code)
|
|
{
|
|
if (gr_locked) {
|
|
if (gr_unlock () == 0) {
|
|
fprintf (stderr,
|
|
_("%s: failed to unlock %s\n"),
|
|
Prog, gr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
|
|
/* continue */
|
|
}
|
|
}
|
|
exit (code);
|
|
}
|
|
|
|
int main (int argc, char **argv)
|
|
{
|
|
char *name;
|
|
struct group *grp;
|
|
|
|
/*
|
|
* Get my name so that I can use it to report errors.
|
|
*/
|
|
Prog = Basename (argv[0]);
|
|
|
|
OPENLOG ("groupmems");
|
|
|
|
(void) setlocale (LC_ALL, "");
|
|
(void) bindtextdomain (PACKAGE, LOCALEDIR);
|
|
(void) textdomain (PACKAGE);
|
|
|
|
process_flags (argc, argv);
|
|
|
|
if (NULL == thisgroup) {
|
|
name = whoami ();
|
|
if (!list && (NULL == name)) {
|
|
fprintf (stderr, _("%s: your groupname does not match your username\n"), Prog);
|
|
fail_exit (EXIT_NOT_PRIMARY);
|
|
}
|
|
} else {
|
|
name = thisgroup;
|
|
if (!list && !isroot ()) {
|
|
fprintf (stderr, _("%s: only root can use the -g/--group option\n"), Prog);
|
|
fail_exit (EXIT_NOT_ROOT);
|
|
}
|
|
}
|
|
|
|
if (!list) {
|
|
check_perms ();
|
|
|
|
if (gr_lock () == 0) {
|
|
fprintf (stderr,
|
|
_("%s: cannot lock %s; try again later.\n"),
|
|
Prog, gr_dbname ());
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
gr_locked = true;
|
|
}
|
|
|
|
if (gr_open (list ? O_RDONLY : O_RDWR) == 0) {
|
|
fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
|
|
grp = (struct group *) gr_locate (name);
|
|
|
|
if (NULL == grp) {
|
|
fprintf (stderr, _("%s: group '%s' does not exist in %s\n"),
|
|
Prog, name, gr_dbname ());
|
|
fail_exit (EXIT_INVALID_GROUP);
|
|
}
|
|
|
|
if (list) {
|
|
display_members (grp->gr_mem);
|
|
} else if (NULL != adduser) {
|
|
if (is_on_list (grp->gr_mem, adduser)) {
|
|
fprintf (stderr,
|
|
_("%s: user '%s' is already a member of '%s'\n"),
|
|
Prog, adduser, grp->gr_name);
|
|
fail_exit (EXIT_MEMBER_EXISTS);
|
|
}
|
|
grp->gr_mem = add_list (grp->gr_mem, adduser);
|
|
if (gr_update (grp) == 0) {
|
|
fprintf (stderr,
|
|
_("%s: failed to prepare the new %s entry '%s'\n"),
|
|
Prog, gr_dbname (), grp->gr_name);
|
|
fail_exit (13);
|
|
}
|
|
} else if (NULL != deluser) {
|
|
if (!is_on_list (grp->gr_mem, deluser)) {
|
|
fprintf (stderr,
|
|
_("%s: user '%s' is not a member of '%s'\n"),
|
|
Prog, deluser, grp->gr_name);
|
|
fail_exit (EXIT_NOT_MEMBER);
|
|
}
|
|
grp->gr_mem = del_list (grp->gr_mem, deluser);
|
|
if (gr_update (grp) == 0) {
|
|
fprintf (stderr,
|
|
_("%s: failed to prepare the new %s entry '%s'\n"),
|
|
Prog, gr_dbname (), grp->gr_name);
|
|
fail_exit (13);
|
|
}
|
|
} else if (purge) {
|
|
grp->gr_mem[0] = NULL;
|
|
if (gr_update (grp) == 0) {
|
|
fprintf (stderr,
|
|
_("%s: failed to prepare the new %s entry '%s'\n"),
|
|
Prog, gr_dbname (), grp->gr_name);
|
|
fail_exit (13);
|
|
}
|
|
}
|
|
|
|
if (gr_close () == 0) {
|
|
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, gr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failure while writing %s", gr_dbname ()));
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
if (gr_unlock () == 0) {
|
|
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
|
|
/* continue */
|
|
}
|
|
|
|
exit (EXIT_SUCCESS);
|
|
}
|
|
|