4e75bb57bb
src/userdel.c, src/chpasswd.c, src/grpck.c, src/gpasswd.c, src/groupdel.c, src/chgpasswd.c, src/vipw.c, src/useradd.c, src/su.c, src/groupmod.c, src/passwd.c, src/pwck.c, src/groupadd.c, src/chage.c, src/login.c, src/faillog.c, src/sulogin.c, src/chsh.c, src/pwconv.c: Added splint annotations. * src/userdel.c, src/pwconv.c, src/lastlog.c, src/grpck.c, src/vipw.c, src/groupmod.c, src/passwd.c, src/pwck.c, src/login.c, src/sulogin.c, src/usermod.c: Use return instead of exit at the end of main(). * src/gpasswd.c, src/passwd.c, src/faillog.c: Use the exitcodes.h exit codes. * src/chpasswd.c: Added missing ||. * src/nologin.c: Do not include exitcodes.h. * src/nologin.c: Added brackets. * src/nologin.c: Avoid assignments in comparisons.
638 lines
16 KiB
C
638 lines
16 KiB
C
/*
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* Copyright (c) 2000 , International Business Machines
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* George Kraft IV, gk4@us.ibm.com, 03/23/2000
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* Copyright (c) 2000 - 2006, Tomasz Kłoczko
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* Copyright (c) 2007 - 2008, Nicolas François
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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. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <grp.h>
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef USE_PAM
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#include "pam_defs.h"
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#endif /* USE_PAM */
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#include <pwd.h>
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#include "defines.h"
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#include "prototypes.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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#endif
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/* Exit Status Values */
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/*@-exitarg@*/
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#define EXIT_SUCCESS 0 /* success */
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#define EXIT_USAGE 1 /* invalid command syntax */
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#define EXIT_GROUP_FILE 2 /* group file access problems */
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#define EXIT_NOT_ROOT 3 /* not superuser */
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#define EXIT_NOT_EROOT 4 /* not effective superuser */
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#define EXIT_NOT_PRIMARY 5 /* not primary owner of group */
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#define EXIT_NOT_MEMBER 6 /* member of group does not exist */
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#define EXIT_MEMBER_EXISTS 7 /* member of group already exists */
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#define EXIT_INVALID_USER 8 /* specified user does not exist */
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#define EXIT_INVALID_GROUP 9 /* specified group does not exist */
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/*
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* Global variables
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*/
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char *Prog;
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static char *adduser = NULL;
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static char *deluser = NULL;
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static char *thisgroup = NULL;
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static bool purge = false;
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static bool list = false;
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static int exclusive = 0;
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static bool gr_locked = false;
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#ifdef SHADOWGRP
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/* Indicate if shadow groups are enabled on the system
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* (/etc/gshadow present) */
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static bool is_shadowgrp;
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static bool sgr_locked = false;
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#endif
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/* local function prototypes */
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static char *whoami (void);
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static void add_user (const char *user,
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const struct group *grp);
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static void remove_user (const char *user,
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const struct group *grp);
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static void purge_members (const struct group *grp);
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static void display_members (const char *const *members);
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static void usage (void);
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static void process_flags (int argc, char **argv);
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static void check_perms (void);
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static void fail_exit (int code);
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#define isroot() (getuid () == 0)
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static char *whoami (void)
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{
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/* local, no need for xgetgrgid */
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struct group *grp = getgrgid (getgid ());
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/* local, no need for xgetpwuid */
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struct passwd *usr = getpwuid (getuid ());
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if ( (NULL != usr)
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&& (NULL != grp)
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&& (0 == strcmp (usr->pw_name, grp->gr_name))) {
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return xstrdup (usr->pw_name);
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} else {
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return NULL;
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}
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}
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/*
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* add_user - Add an user to the specified group
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*/
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static void add_user (const char *user,
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const struct group *grp)
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{
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struct group *newgrp;
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/* Make sure the user is not already part of the group */
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if (is_on_list (grp->gr_mem, user)) {
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fprintf (stderr,
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_("%s: user '%s' is already a member of '%s'\n"),
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Prog, user, grp->gr_name);
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fail_exit (EXIT_MEMBER_EXISTS);
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}
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newgrp = __gr_dup(grp);
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if (NULL == newgrp) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, gr_dbname ());
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fail_exit (13);
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}
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/* Add the user to the /etc/group group */
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newgrp->gr_mem = add_list (newgrp->gr_mem, user);
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#ifdef SHADOWGRP
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if (is_shadowgrp) {
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const struct sgrp *sg = sgr_locate (newgrp->gr_name);
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struct sgrp *newsg;
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if (NULL == sg) {
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/* Create a shadow group based on this group */
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static struct sgrp sgrent;
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sgrent.sg_name = xstrdup (newgrp->gr_name);
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sgrent.sg_mem = dup_list (newgrp->gr_mem);
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sgrent.sg_adm = (char **) xmalloc (sizeof (char *));
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#ifdef FIRST_MEMBER_IS_ADMIN
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if (sgrent.sg_mem[0]) {
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sgrent.sg_adm[0] = xstrdup (sgrent.sg_mem[0]);
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sgrent.sg_adm[1] = NULL;
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} else
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#endif
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{
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sgrent.sg_adm[0] = NULL;
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}
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/* Move any password to gshadow */
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sgrent.sg_passwd = newgrp->gr_passwd;
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newgrp->gr_passwd = SHADOW_PASSWD_STRING;
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newsg = &sgrent;
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} else {
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newsg = __sgr_dup (sg);
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if (NULL == newsg) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, sgr_dbname ());
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fail_exit (13);
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}
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/* Add the user to the members */
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newsg->sg_mem = add_list (newsg->sg_mem, user);
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/* Do not touch the administrators */
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}
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if (sgr_update (newsg) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, sgr_dbname (), newsg->sg_name);
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fail_exit (13);
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}
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}
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#endif
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if (gr_update (newgrp) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, gr_dbname (), newgrp->gr_name);
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fail_exit (13);
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}
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}
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/*
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* remove_user - Remove an user from a given group
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*/
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static void remove_user (const char *user,
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const struct group *grp)
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{
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struct group *newgrp;
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/* Check if the user is a member of the specified group */
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if (!is_on_list (grp->gr_mem, user)) {
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fprintf (stderr,
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_("%s: user '%s' is not a member of '%s'\n"),
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Prog, user, grp->gr_name);
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fail_exit (EXIT_NOT_MEMBER);
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}
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newgrp = __gr_dup (grp);
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if (NULL == newgrp) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, gr_dbname ());
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fail_exit (13);
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}
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/* Remove the user from the /etc/group group */
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newgrp->gr_mem = del_list (newgrp->gr_mem, user);
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#ifdef SHADOWGRP
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if (is_shadowgrp) {
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const struct sgrp *sg = sgr_locate (newgrp->gr_name);
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struct sgrp *newsg;
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if (NULL == sg) {
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/* Create a shadow group based on this group */
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static struct sgrp sgrent;
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sgrent.sg_name = xstrdup (newgrp->gr_name);
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sgrent.sg_mem = dup_list (newgrp->gr_mem);
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sgrent.sg_adm = (char **) xmalloc (sizeof (char *));
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#ifdef FIRST_MEMBER_IS_ADMIN
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if (sgrent.sg_mem[0]) {
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sgrent.sg_adm[0] = xstrdup (sgrent.sg_mem[0]);
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sgrent.sg_adm[1] = NULL;
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} else
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#endif
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{
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sgrent.sg_adm[0] = NULL;
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}
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/* Move any password to gshadow */
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sgrent.sg_passwd = newgrp->gr_passwd;
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newgrp->gr_passwd = SHADOW_PASSWD_STRING;
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newsg = &sgrent;
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} else {
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newsg = __sgr_dup (sg);
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if (NULL == newsg) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, sgr_dbname ());
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fail_exit (13);
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}
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/* Remove the user from the members */
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newsg->sg_mem = del_list (newsg->sg_mem, user);
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/* Remove the user from the administrators */
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newsg->sg_adm = del_list (newsg->sg_adm, user);
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}
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if (sgr_update (newsg) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, sgr_dbname (), newsg->sg_name);
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fail_exit (13);
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}
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}
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#endif
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if (gr_update (newgrp) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, gr_dbname (), newgrp->gr_name);
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fail_exit (13);
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}
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}
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/*
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* purge_members - Rmeove every members of the specified group
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*/
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static void purge_members (const struct group *grp)
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{
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struct group *newgrp = __gr_dup (grp);
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if (NULL == newgrp) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, gr_dbname ());
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fail_exit (13);
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}
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/* Remove all the members of the /etc/group group */
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newgrp->gr_mem[0] = NULL;
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#ifdef SHADOWGRP
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if (is_shadowgrp) {
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const struct sgrp *sg = sgr_locate (newgrp->gr_name);
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struct sgrp *newsg;
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if (NULL == sg) {
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/* Create a shadow group based on this group */
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static struct sgrp sgrent;
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sgrent.sg_name = xstrdup (newgrp->gr_name);
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sgrent.sg_mem = (char **) xmalloc (sizeof (char *));
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sgrent.sg_mem[0] = NULL;
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sgrent.sg_adm = (char **) xmalloc (sizeof (char *));
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sgrent.sg_adm[0] = NULL;
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/* Move any password to gshadow */
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sgrent.sg_passwd = newgrp->gr_passwd;
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newgrp->gr_passwd = xstrdup(SHADOW_PASSWD_STRING);
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newsg = &sgrent;
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} else {
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newsg = __sgr_dup (sg);
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if (NULL == newsg) {
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fprintf (stderr,
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_("%s: Out of memory. Cannot update %s.\n"),
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Prog, sgr_dbname ());
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fail_exit (13);
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}
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/* Remove all the members of the /etc/gshadow
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* group */
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newsg->sg_mem[0] = NULL;
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/* Remove all the administrators of the
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* /etc/gshadow group */
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newsg->sg_adm[0] = NULL;
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}
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if (sgr_update (newsg) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, sgr_dbname (), newsg->sg_name);
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fail_exit (13);
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}
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}
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#endif
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if (gr_update (newgrp) == 0) {
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fprintf (stderr,
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_("%s: failed to prepare the new %s entry '%s'\n"),
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Prog, gr_dbname (), newgrp->gr_name);
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fail_exit (13);
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}
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}
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static void display_members (const char *const *members)
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{
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int i;
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for (i = 0; NULL != members[i]; i++) {
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printf ("%s ", members[i]);
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if (NULL == members[i + 1]) {
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printf ("\n");
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} else {
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printf (" ");
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}
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}
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}
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static void usage (void)
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{
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(void) fputs (_("Usage: groupmems [options] [action]\n"
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"\n"
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"Options:\n"
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" -g, --group groupname change groupname instead of the user's group\n"
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" (root only)\n"
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"\n"
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"Actions:\n"
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" -a, --add username add username to the members of the group\n"
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" -d, --delete username remove username from the members of the group\n"
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" -p, --purge purge all members from the group\n"
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" -l, --list list the members of the group\n"
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"\n"), stderr);
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fail_exit (EXIT_USAGE);
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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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static void process_flags (int argc, char **argv)
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{
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int arg;
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int option_index = 0;
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static struct option long_options[] = {
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{"add", required_argument, NULL, 'a'},
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{"delete", required_argument, NULL, 'd'},
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{"group", required_argument, NULL, 'g'},
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{"list", no_argument, NULL, 'l'},
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{"purge", no_argument, NULL, 'p'},
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{NULL, 0, NULL, '\0'}
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};
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while ((arg = getopt_long (argc, argv, "a:d:g:lp", long_options,
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&option_index)) != EOF) {
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switch (arg) {
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case 'a':
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adduser = xstrdup (optarg);
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++exclusive;
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break;
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case 'd':
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deluser = xstrdup (optarg);
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++exclusive;
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break;
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case 'g':
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thisgroup = xstrdup (optarg);
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break;
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case 'l':
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list = true;
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++exclusive;
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break;
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case 'p':
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purge = true;
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++exclusive;
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break;
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default:
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usage ();
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}
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}
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if ((exclusive > 1) || (optind < argc)) {
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usage ();
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}
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/* local, no need for xgetpwnam */
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if ( (NULL != adduser)
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&& (getpwnam (adduser) == NULL)) {
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fprintf (stderr, _("%s: user '%s' does not exist\n"),
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Prog, adduser);
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fail_exit (EXIT_INVALID_USER);
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}
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}
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static void check_perms (void)
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{
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if (!list) {
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#ifdef USE_PAM
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pam_handle_t *pamh = NULL;
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int retval;
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struct passwd *pampw;
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pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
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if (NULL == pampw) {
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fprintf (stderr,
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_("%s: Cannot determine your user name.\n"),
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Prog);
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fail_exit (1);
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}
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retval = pam_start ("groupmems", pampw->pw_name, &conv, &pamh);
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if (PAM_SUCCESS == retval) {
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retval = pam_authenticate (pamh, 0);
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}
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if (PAM_SUCCESS == retval) {
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retval = pam_acct_mgmt (pamh, 0);
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}
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if (NULL != pamh) {
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(void) pam_end (pamh, retval);
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}
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if (PAM_SUCCESS != retval) {
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fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
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fail_exit (1);
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}
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#endif
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}
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}
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static void fail_exit (int code)
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{
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if (gr_locked) {
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if (gr_unlock () == 0) {
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fprintf (stderr,
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_("%s: failed to unlock %s\n"),
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Prog, gr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
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/* continue */
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}
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}
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#ifdef SHADOWGRP
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if (sgr_locked) {
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if (sgr_unlock () == 0) {
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fprintf (stderr,
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_("%s: failed to unlock %s\n"),
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Prog, sgr_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
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/* continue */
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}
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}
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#endif
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exit (code);
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}
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static void open_files (void)
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{
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if (!list) {
|
|
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;
|
|
|
|
#ifdef SHADOWGRP
|
|
if (is_shadowgrp) {
|
|
if (sgr_lock () == 0) {
|
|
fprintf (stderr,
|
|
_("%s: cannot lock %s; try again later.\n"),
|
|
Prog, sgr_dbname ());
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
sgr_locked = true;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (gr_open (list ? O_RDONLY : O_RDWR) == 0) {
|
|
fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
|
|
#ifdef SHADOWGRP
|
|
if (is_shadowgrp) {
|
|
if (sgr_open (list ? O_RDONLY : O_RDWR) == 0) {
|
|
fprintf (stderr, _("%s: cannot open %s\n"), Prog, sgr_dbname ());
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void close_files (void)
|
|
{
|
|
if ((gr_close () == 0) && !list) {
|
|
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, gr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ()));
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
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 */
|
|
}
|
|
gr_locked = false;
|
|
}
|
|
|
|
#ifdef SHADOWGRP
|
|
if (is_shadowgrp) {
|
|
if ((sgr_close () == 0) && !list) {
|
|
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, sgr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ()));
|
|
fail_exit (EXIT_GROUP_FILE);
|
|
}
|
|
if (sgr_locked) {
|
|
if (sgr_unlock () == 0) {
|
|
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
|
|
SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
|
|
/* continue */
|
|
}
|
|
sgr_locked = false;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int main (int argc, char **argv)
|
|
{
|
|
char *name;
|
|
const 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);
|
|
|
|
#ifdef SHADOWGRP
|
|
is_shadowgrp = sgr_file_present ();
|
|
#endif
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
check_perms ();
|
|
|
|
open_files ();
|
|
|
|
grp = 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 ((const char *const *)grp->gr_mem);
|
|
} else if (NULL != adduser) {
|
|
add_user (adduser, grp);
|
|
} else if (NULL != deluser) {
|
|
remove_user (deluser, grp);
|
|
} else if (purge) {
|
|
purge_members (grp);
|
|
}
|
|
|
|
close_files ();
|
|
|
|
exit (EXIT_SUCCESS);
|
|
}
|
|
|