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shadow/src/userdel.c
nekral-guest 4a4549c49b * src/userdel.c, libmisc/user_busy.c, libmisc/Makefile.am, 
lib/prototypes.h: Move user_busy() to libmisc/user_busy.c.
	* NEWS, libmisc/user_busy.c: On Linux, do not check if an user is
	logged in with utmp, but check if the user is running some
	processes. If not on Linux, continue to search for an utmp record,
	but make sure the process recorded in the utmp entry is still
	running.
2009-05-18 18:32:17 +00:00

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/*
* Copyright (c) 1991 - 1994, Julianne Frances Haugh
* Copyright (c) 1996 - 2000, Marek Michałkiewicz
* 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>
#ident "$Id$"
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/stat.h>
#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
#include "pam_defs.h"
#endif /* USE_PAM */
#endif /* ACCT_TOOLS_SETUID */
#include "defines.h"
#include "getdef.h"
#include "groupio.h"
#include "nscd.h"
#include "prototypes.h"
#include "pwauth.h"
#include "pwio.h"
#include "shadowio.h"
#ifdef SHADOWGRP
#include "sgroupio.h"
#endif
/*@-exitarg@*/
#include "exitcodes.h"
/*
* exit status values
*/
#define E_PW_UPDATE 1 /* can't update password file */
#define E_NOTFOUND 6 /* specified user doesn't exist */
#define E_USER_BUSY 8 /* user currently logged in */
#define E_GRP_UPDATE 10 /* can't update group file */
#define E_HOMEDIR 12 /* can't remove home directory */
/*
* Global variables
*/
char *Prog;
static char *user_name;
static uid_t user_id;
static char *user_home;
static bool fflg = false;
static bool rflg = false;
static bool is_shadow_pwd;
#ifdef SHADOWGRP
static bool is_shadow_grp;
static bool sgr_locked = false;
#endif
static bool pw_locked = false;
static bool gr_locked = false;
static bool spw_locked = false;
/* local function prototypes */
static void usage (void);
static void update_groups (void);
static void close_files (void);
static void fail_exit (int);
static void open_files (void);
static void update_user (void);
static void user_cancel (const char *);
#ifdef EXTRA_CHECK_HOME_DIR
static bool path_prefix (const char *, const char *);
#endif
static int is_owner (uid_t, const char *);
static void remove_mailbox (void);
/*
* usage - display usage message and exit
*/
static void usage (void)
{
fputs (_("Usage: userdel [options] LOGIN\n"
"\n"
"Options:\n"
" -f, --force force removal of files,\n"
" even if not owned by user\n"
" -h, --help display this help message and exit\n"
" -r, --remove remove home directory and mail spool\n"
"\n"), stderr);
exit (E_USAGE);
}
/*
* update_groups - delete user from secondary group set
*
* update_groups() takes the user name that was given and searches
* the group files for membership in any group.
*
* we also check to see if they have any groups they own (the same
* name is their user name) and delete them too (only if USERGROUPS_ENAB
* is enabled).
*/
static void update_groups (void)
{
const struct group *grp;
struct group *ngrp;
struct passwd *pwd;
#ifdef SHADOWGRP
bool deleted_user_group = false;
const struct sgrp *sgrp;
struct sgrp *nsgrp;
#endif /* SHADOWGRP */
/*
* Scan through the entire group file looking for the groups that
* the user is a member of.
*/
for (gr_rewind (), grp = gr_next (); NULL != grp; grp = gr_next ()) {
/*
* See if the user specified this group as one of their
* concurrent groups.
*/
if (!is_on_list (grp->gr_mem, user_name)) {
continue;
}
/*
* Delete the username from the list of group members and
* update the group entry to reflect the change.
*/
ngrp = __gr_dup (grp);
if (NULL == ngrp) {
fprintf (stderr,
_("%s: Out of memory. Cannot update %s.\n"),
Prog, gr_dbname ());
exit (13); /* XXX */
}
ngrp->gr_mem = del_list (ngrp->gr_mem, user_name);
if (gr_update (ngrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, gr_dbname (), ngrp->gr_name);
exit (E_GRP_UPDATE);
}
/*
* Update the DBM group file with the new entry as well.
*/
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user from group",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO, "delete '%s' from group '%s'\n",
user_name, ngrp->gr_name));
}
/*
* we've removed their name from all the groups above, so
* now if they have a group with the same name as their
* user name, with no members, we delete it.
*/
grp = xgetgrnam (user_name);
if ( (NULL != grp)
&& getdef_bool ("USERGROUPS_ENAB")
&& (NULL == grp->gr_mem[0])) {
pwd = NULL;
if (!fflg) {
/*
* Scan the passwd file to check if this group is still
* used as a primary group.
*/
setpwent ();
while ((pwd = getpwent ()) != NULL) {
if (strcmp (pwd->pw_name, user_name) == 0) {
continue;
}
if (pwd->pw_gid == grp->gr_gid) {
fprintf (stderr,
_("%s: group %s is the primary group of another user and is not removed.\n"),
Prog, grp->gr_name);
break;
}
}
endpwent ();
}
if (NULL == pwd) {
/*
* We can remove this group, it is not the primary
* group of any remaining user.
*/
if (gr_remove (grp->gr_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, grp->gr_name, gr_dbname ());
fail_exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
deleted_user_group = true;
#endif
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_GROUP, Prog,
"deleting group",
grp->gr_name, AUDIT_NO_ID,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO,
"removed group '%s' owned by '%s'\n",
grp->gr_name, user_name));
}
}
#ifdef SHADOWGRP
if (!is_shadow_grp) {
return;
}
/*
* Scan through the entire shadow group file looking for the groups
* that the user is a member of. Both the administrative list and
* the ordinary membership list is checked.
*/
for (sgr_rewind (), sgrp = sgr_next ();
NULL != sgrp;
sgrp = sgr_next ()) {
bool was_member, was_admin;
/*
* See if the user specified this group as one of their
* concurrent groups.
*/
was_member = is_on_list (sgrp->sg_mem, user_name);
was_admin = is_on_list (sgrp->sg_adm, user_name);
if (!was_member && !was_admin) {
continue;
}
nsgrp = __sgr_dup (sgrp);
if (NULL == nsgrp) {
fprintf (stderr,
_("%s: Out of memory. Cannot update %s.\n"),
Prog, sgr_dbname ());
exit (13); /* XXX */
}
if (was_member) {
nsgrp->sg_mem = del_list (nsgrp->sg_mem, user_name);
}
if (was_admin) {
nsgrp->sg_adm = del_list (nsgrp->sg_adm, user_name);
}
if (sgr_update (nsgrp) == 0) {
fprintf (stderr,
_("%s: failed to prepare the new %s entry '%s'\n"),
Prog, sgr_dbname (), nsgrp->sg_name);
exit (E_GRP_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user from shadow group",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO, "delete '%s' from shadow group '%s'\n",
user_name, nsgrp->sg_name));
}
if ( deleted_user_group
&& (sgr_locate (user_name) != NULL)) {
if (sgr_remove (user_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, sgr_dbname ());
fail_exit (E_GRP_UPDATE);
}
}
#endif /* SHADOWGRP */
}
/*
* close_files - close all of the files that were opened
*
* close_files() closes all of the files that were opened for this
* new user. This causes any modified entries to be written out.
*/
static void close_files (void)
{
if (pw_close () == 0) {
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, pw_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
fail_exit (E_PW_UPDATE);
}
if (pw_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
/* continue */
}
pw_locked = false;
if (is_shadow_pwd) {
if (spw_close () == 0) {
fprintf (stderr,
_("%s: failure while writing changes to %s\n"), Prog, spw_dbname ());
SYSLOG ((LOG_ERR, "failure while writing changes to %s", spw_dbname ()));
fail_exit (E_PW_UPDATE);
}
if (spw_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
/* continue */
}
spw_locked = false;
}
if (gr_close () == 0) {
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 (E_GRP_UPDATE);
}
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_shadow_grp) {
if (sgr_close () == 0) {
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 (E_GRP_UPDATE);
}
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
}
/*
* fail_exit - exit with a failure code after unlocking the files
*/
static void fail_exit (int code)
{
if (pw_locked) {
if (pw_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
/* continue */
}
}
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 */
}
}
if (spw_locked) {
if (spw_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
/* continue */
}
}
#ifdef SHADOWGRP
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 */
}
}
#endif
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
exit (code);
}
/*
* open_files - lock and open the password files
*
* open_files() opens the two password files.
*/
static void open_files (void)
{
if (pw_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, pw_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking password file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_PW_UPDATE);
}
pw_locked = true;
if (pw_open (O_RDWR) == 0) {
fprintf (stderr,
_("%s: cannot open %s\n"), Prog, pw_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening password file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_PW_UPDATE);
}
if (is_shadow_pwd) {
if (spw_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, spw_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking shadow password file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_PW_UPDATE);
}
spw_locked = true;
if (spw_open (O_RDWR) == 0) {
fprintf (stderr,
_("%s: cannot open %s\n"),
Prog, spw_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening shadow password file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_PW_UPDATE);
}
}
if (gr_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, gr_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_GRP_UPDATE);
}
gr_locked = true;
if (gr_open (O_RDWR) == 0) {
fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_GRP_UPDATE);
}
#ifdef SHADOWGRP
if (is_shadow_grp) {
if (sgr_lock () == 0) {
fprintf (stderr,
_("%s: cannot lock %s; try again later.\n"),
Prog, sgr_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"locking shadow group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_GRP_UPDATE);
}
sgr_locked= true;
if (sgr_open (O_RDWR) == 0) {
fprintf (stderr, _("%s: cannot open %s\n"),
Prog, sgr_dbname ());
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"opening shadow group file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_GRP_UPDATE);
}
}
#endif
}
/*
* update_user - delete the user entries
*
* update_user() deletes the password file entries for this user
* and will update the group entries as required.
*/
static void update_user (void)
{
if (pw_remove (user_name) == 0) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, pw_dbname ());
fail_exit (E_PW_UPDATE);
}
if ( is_shadow_pwd
&& (spw_locate (user_name) != NULL)
&& (spw_remove (user_name) == 0)) {
fprintf (stderr,
_("%s: cannot remove entry '%s' from %s\n"),
Prog, user_name, spw_dbname ());
fail_exit (E_PW_UPDATE);
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user entries",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO, "delete user '%s'\n", user_name));
}
/*
* user_cancel - cancel cron and at jobs
*
* user_cancel calls a script for additional cleanups like removal of
* cron, at, or print jobs.
*/
static void user_cancel (const char *user)
{
char *cmd;
pid_t pid, wpid;
int status;
cmd = getdef_str ("USERDEL_CMD");
if (NULL == cmd) {
return;
}
pid = fork ();
if (pid == 0) {
execl (cmd, cmd, user, (char *) 0);
perror (cmd);
exit (errno == ENOENT ? E_CMD_NOTFOUND : E_CMD_NOEXEC);
} else if ((pid_t)-1 == pid) {
perror ("fork");
return;
}
do {
wpid = wait (&status);
} while ((wpid != pid) && ((pid_t)-1 != wpid));
}
#ifdef EXTRA_CHECK_HOME_DIR
static bool path_prefix (const char *s1, const char *s2)
{
return ( (strncmp (s2, s1, strlen (s1)) == 0)
&& ( ('\0' == s2[strlen (s1)])
|| ('/' == s2[strlen (s1)])));
}
#endif
static int is_owner (uid_t uid, const char *path)
{
struct stat st;
if (stat (path, &st) != 0) {
return -1;
}
return (st.st_uid == uid);
}
static void remove_mailbox (void)
{
const char *maildir;
char mailfile[1024];
int i;
maildir = getdef_str ("MAIL_DIR");
#ifdef MAIL_SPOOL_DIR
if ((NULL == maildir) && (getdef_str ("MAIL_FILE") == NULL)) {
maildir = MAIL_SPOOL_DIR;
}
#endif
if (NULL == maildir) {
return;
}
snprintf (mailfile, sizeof mailfile, "%s/%s", maildir, user_name);
if (fflg) {
if (unlink (mailfile) != 0) {
fprintf (stderr, _("%s: warning: can't remove %s: %s"), Prog, mailfile, strerror (errno));
SYSLOG ((LOG_ERR, "Cannot remove %s: %s", mailfile, strerror (errno)));
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting mail file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
#ifdef WITH_AUDIT
else
{
audit_logger (AUDIT_DEL_USER, Prog,
"deleting mail file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
}
#endif
return;
}
i = is_owner (user_id, mailfile);
if (i == 0) {
fprintf (stderr,
_("%s: %s not owned by %s, not removing\n"),
Prog, mailfile, user_name);
SYSLOG ((LOG_ERR, "%s not owned by %s, not removed", mailfile, strerror (errno)));
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting mail file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
return;
} else if (i == -1) {
return; /* mailbox doesn't exist */
}
if (unlink (mailfile) != 0) {
fprintf (stderr, _("%s: warning: can't remove %s: %s"), Prog, mailfile, strerror (errno));
SYSLOG ((LOG_ERR, "Cannot remove %s: %s", mailfile, strerror (errno)));
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting mail file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
#ifdef WITH_AUDIT
else
{
audit_logger (AUDIT_DEL_USER, Prog,
"deleting mail file",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
}
#endif
}
/*
* main - userdel command
*/
int main (int argc, char **argv)
{
int errors = 0; /* Error in the removal of the home directory */
#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
pam_handle_t *pamh = NULL;
int retval;
#endif /* USE_PAM */
#endif /* ACCT_TOOLS_SETUID */
#ifdef WITH_AUDIT
audit_help_open ();
#endif
/*
* Get my name so that I can use it to report errors.
*/
Prog = Basename (argv[0]);
(void) setlocale (LC_ALL, "");
(void) bindtextdomain (PACKAGE, LOCALEDIR);
(void) textdomain (PACKAGE);
{
/*
* Parse the command line options.
*/
int c;
static struct option long_options[] = {
{"force", no_argument, NULL, 'f'},
{"help", no_argument, NULL, 'h'},
{"remove", no_argument, NULL, 'r'},
{NULL, 0, NULL, '\0'}
};
while ((c = getopt_long (argc, argv, "fhr",
long_options, NULL)) != -1) {
switch (c) {
case 'f': /* force remove even if not owned by user */
fflg = true;
break;
case 'r': /* remove home dir and mailbox */
rflg = true;
break;
default:
usage ();
}
}
}
if ((optind + 1) != argc) {
usage ();
}
OPENLOG ("userdel");
#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
{
struct passwd *pampw;
pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
if (pampw == NULL) {
fprintf (stderr,
_("%s: Cannot determine your user name.\n"),
Prog);
exit (E_PW_UPDATE);
}
retval = pam_start ("userdel", pampw->pw_name, &conv, &pamh);
}
if (PAM_SUCCESS == retval) {
retval = pam_authenticate (pamh, 0);
}
if (PAM_SUCCESS == retval) {
retval = pam_acct_mgmt (pamh, 0);
}
if (NULL != pamh) {
(void) pam_end (pamh, retval);
}
if (PAM_SUCCESS != retval) {
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
exit (E_PW_UPDATE);
}
#endif /* USE_PAM */
#endif /* ACCT_TOOLS_SETUID */
is_shadow_pwd = spw_file_present ();
#ifdef SHADOWGRP
is_shadow_grp = sgr_file_present ();
#endif
/*
* Start with a quick check to see if the user exists.
*/
user_name = argv[argc - 1];
{
struct passwd *pwd;
pwd = getpwnam (user_name); /* local, no need for xgetpwnam */
if (NULL == pwd) {
fprintf (stderr, _("%s: user '%s' does not exist\n"),
Prog, user_name);
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user not found",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
exit (E_NOTFOUND);
}
user_id = pwd->pw_uid;
user_home = xstrdup (pwd->pw_dir);
}
#ifdef USE_NIS
/*
* Now make sure it isn't an NIS user.
*/
if (__ispwNIS ()) {
char *nis_domain;
char *nis_master;
fprintf (stderr,
_("%s: user %s is a NIS user\n"), Prog, user_name);
if ( !yp_get_default_domain (&nis_domain)
&& !yp_master (nis_domain, "passwd.byname", &nis_master)) {
fprintf (stderr,
_("%s: %s is the NIS master\n"),
Prog, nis_master);
}
exit (E_NOTFOUND);
}
#endif
/*
* Check to make certain the user isn't logged in.
* Note: This is a best effort basis. The user may log in between,
* a cron job may be started on her behalf, etc.
*/
if (user_busy (user_name, user_id) != 0) {
fprintf (stderr,
_("%s: user %s is currently logged in\n"),
Prog, user_name);
if (!fflg) {
#ifdef WITH_AUDIT
audit_logger (AUDIT_DEL_USER, Prog,
"deleting user logged in",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
exit (E_USER_BUSY);
}
}
/*
* Do the hard stuff - open the files, create the user entries,
* create the home directory, then close and update the files.
*/
open_files ();
update_user ();
update_groups ();
if (rflg) {
remove_mailbox ();
}
if (rflg && !fflg && (is_owner (user_id, user_home) == 0)) {
fprintf (stderr,
_("%s: %s not owned by %s, not removing\n"),
Prog, user_home, user_name);
rflg = 0;
errors++;
/* continue */
}
#ifdef EXTRA_CHECK_HOME_DIR
/* This may be slow, the above should be good enough. */
if (rflg && !fflg) {
struct passwd *pwd;
/*
* For safety, refuse to remove the home directory if it
* would result in removing some other user's home
* directory. Still not perfect so be careful, but should
* prevent accidents if someone has /home or / as home
* directory... --marekm
*/
setpwent ();
while ((pwd = getpwent ())) {
if (strcmp (pwd->pw_name, user_name) == 0) {
continue;
}
if (path_prefix (user_home, pwd->pw_dir)) {
fprintf (stderr,
_
("%s: not removing directory %s (would remove home of user %s)\n"),
Prog, user_home, pwd->pw_name);
rflg = false;
errors++;
/* continue */
break;
}
}
endpwent ();
}
#endif
if (rflg) {
if (remove_tree (user_home) != 0) {
fprintf (stderr,
_("%s: error removing directory %s\n"),
Prog, user_home);
errors++;
/* continue */
}
#ifdef WITH_AUDIT
else
{
audit_logger (AUDIT_DEL_USER, Prog,
"deleting home directory",
user_name, (unsigned int) user_id,
SHADOW_AUDIT_SUCCESS);
}
#endif
}
#ifdef WITH_AUDIT
if (0 != errors) {
audit_logger (AUDIT_DEL_USER, Prog,
"deleting home directory",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
}
#endif
#ifdef WITH_SELINUX
if (is_selinux_enabled () > 0) {
const char *args[5];
args[0] = "/usr/sbin/semanage";
args[1] = "login";
args[2] = "-d";
args[3] = user_name;
args[4] = NULL;
safe_system (args[0], args, NULL, 1);
}
#endif
/*
* Cancel any crontabs or at jobs. Have to do this before we remove
* the entry from /etc/passwd.
*/
user_cancel (user_name);
close_files ();
nscd_flush_cache ("passwd");
nscd_flush_cache ("group");
return ((0 != errors) ? E_HOMEDIR : E_SUCCESS);
}
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