997 lines
25 KiB
C
997 lines
25 KiB
C
/*
|
|
* 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_busy (const char *, uid_t);
|
|
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_busy - see if user is logged in.
|
|
*
|
|
* XXX - should probably check if there are any processes owned
|
|
* by this user. Also, I think this check should be in usermod
|
|
* as well (at least when changing username or UID). --marekm
|
|
*/
|
|
static void user_busy (const char *name, uid_t uid)
|
|
{
|
|
|
|
/*
|
|
* We see if the user is logged in by looking for the user name
|
|
* in the utmp file.
|
|
*/
|
|
#ifdef USE_UTMPX
|
|
struct utmpx *utent;
|
|
|
|
setutxent ();
|
|
while ((utent = getutxent ()) != NULL)
|
|
#else /* !USE_UTMPX */
|
|
struct utmp *utent;
|
|
|
|
setutent ();
|
|
while ((utent = getutent ()) != NULL)
|
|
#endif /* !USE_UTMPX */
|
|
{
|
|
if (utent->ut_type != USER_PROCESS)
|
|
continue;
|
|
|
|
if (strncmp (utent->ut_user, name, sizeof utent->ut_user) != 0) {
|
|
continue;
|
|
}
|
|
fprintf (stderr,
|
|
_("%s: user %s is currently logged in\n"), Prog, name);
|
|
if (!fflg) {
|
|
#ifdef WITH_AUDIT
|
|
audit_logger (AUDIT_DEL_USER, Prog,
|
|
"deleting user logged in",
|
|
name, AUDIT_NO_ID,
|
|
SHADOW_AUDIT_FAILURE);
|
|
#endif
|
|
exit (E_USER_BUSY);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
user_busy (user_name, user_id);
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|