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useradd.c
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useradd.c
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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 - 2012, 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 <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <grp.h>
#include <lastlog.h>
#include <pwd.h>
#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
#include "pam_defs.h"
#endif /* USE_PAM */
#endif /* ACCT_TOOLS_SETUID */
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "chkname.h"
#include "defines.h"
#include "faillog.h"
#include "getdef.h"
#include "groupio.h"
#include "nscd.h"
#include "sssd.h"
#include "prototypes.h"
#include "pwauth.h"
#include "pwio.h"
#ifdef SHADOWGRP
#include "sgroupio.h"
#endif
#include "shadowio.h"
#ifdef ENABLE_SUBIDS
#include "subordinateio.h"
#endif /* ENABLE_SUBIDS */
#ifdef WITH_TCB
#include "tcbfuncs.h"
#endif
#ifndef SKEL_DIR
#define SKEL_DIR "/etc/skel"
#endif
#ifndef USER_DEFAULTS_FILE
#define USER_DEFAULTS_FILE "/etc/default/useradd"
#define NEW_USER_FILE "/etc/default/nuaddXXXXXX"
#endif
/*
* Needed for MkLinux DR1/2/2.1 - J.
*/
#ifndef LASTLOG_FILE
#define LASTLOG_FILE "/var/log/lastlog"
#endif
/*
* Global variables
*/
const char *Prog;
/*
* These defaults are used if there is no defaults file.
*/
static gid_t def_group = 100;
static const char *def_gname = "other";
static const char *def_home = "/home";
static const char *def_shell = "";
static const char *def_template = SKEL_DIR;
static const char *def_create_mail_spool = "no";
static long def_inactive = -1;
static const char *def_expire = "";
#define VALID(s) (strcspn (s, ":\n") == strlen (s))
static const char *user_name = "";
static const char *user_pass = "!";
static uid_t user_id;
static gid_t user_gid;
static const char *user_comment = "";
static const char *user_home = "";
static const char *user_shell = "";
static const char *create_mail_spool = "";
static const char *prefix = "";
static const char *prefix_user_home = NULL;
#ifdef WITH_SELINUX
static /*@notnull@*/const char *user_selinux = "";
#endif /* WITH_SELINUX */
static long user_expire = -1;
static bool is_shadow_pwd;
#ifdef SHADOWGRP
static bool is_shadow_grp;
static bool sgr_locked = false;
#endif
#ifdef ENABLE_SUBIDS
static bool is_sub_uid = false;
static bool is_sub_gid = false;
static bool sub_uid_locked = false;
static bool sub_gid_locked = false;
static uid_t sub_uid_start; /* New subordinate uid range */
static unsigned long sub_uid_count;
static gid_t sub_gid_start; /* New subordinate gid range */
static unsigned long sub_gid_count;
#endif /* ENABLE_SUBIDS */
static bool pw_locked = false;
static bool gr_locked = false;
static bool spw_locked = false;
static char **user_groups; /* NULL-terminated list */
static long sys_ngroups;
static bool do_grp_update = false; /* group files need to be updated */
extern int allow_bad_names;
static bool
bflg = false, /* new default root of home directory */
cflg = false, /* comment (GECOS) field for new account */
dflg = false, /* home directory for new account */
Dflg = false, /* set/show new user default values */
eflg = false, /* days since 1970-01-01 when account is locked */
fflg = false, /* days until account with expired password is locked */
gflg = false, /* primary group ID for new account */
Gflg = false, /* secondary group set for new account */
kflg = false, /* specify a directory to fill new user directory */
lflg = false, /* do not add user to lastlog/faillog databases */
mflg = false, /* create user's home directory if it doesn't exist */
Mflg = false, /* do not create user's home directory even if CREATE_HOME is set */
Nflg = false, /* do not create a group having the same name as the user, but add the user to def_group (or the group specified with -g) */
oflg = false, /* permit non-unique user ID to be specified with -u */
rflg = false, /* create a system account */
sflg = false, /* shell program for new account */
subvolflg = false, /* create subvolume home on BTRFS */
uflg = false, /* specify user ID for new account */
Uflg = false; /* create a group having the same name as the user */
#ifdef WITH_SELINUX
#define Zflg ('\0' != *user_selinux)
#endif /* WITH_SELINUX */
static bool home_added = false;
/*
* exit status values
*/
/*@-exitarg@*/
#define E_SUCCESS 0 /* success */
#define E_PW_UPDATE 1 /* can't update password file */
#define E_USAGE 2 /* invalid command syntax */
#define E_BAD_ARG 3 /* invalid argument to option */
#define E_UID_IN_USE 4 /* UID already in use (and no -o) */
#define E_NOTFOUND 6 /* specified group doesn't exist */
#define E_NAME_IN_USE 9 /* username already in use */
#define E_GRP_UPDATE 10 /* can't update group file */
#define E_HOMEDIR 12 /* can't create home directory */
#define E_SE_UPDATE 14 /* can't update SELinux user mapping */
#ifdef ENABLE_SUBIDS
#define E_SUB_UID_UPDATE 16 /* can't update the subordinate uid file */
#define E_SUB_GID_UPDATE 18 /* can't update the subordinate gid file */
#endif /* ENABLE_SUBIDS */
#define DGROUP "GROUP="
#define DHOME "HOME="
#define DSHELL "SHELL="
#define DINACT "INACTIVE="
#define DEXPIRE "EXPIRE="
#define DSKEL "SKEL="
#define DCREATE_MAIL_SPOOL "CREATE_MAIL_SPOOL="
/* local function prototypes */
static void fail_exit (int);
static void get_defaults (void);
static void show_defaults (void);
static int set_defaults (void);
static int get_groups (char *);
static void usage (int status);
static void new_pwent (struct passwd *);
static long scale_age (long);
static void new_spent (struct spwd *);
static void grp_update (void);
static void process_flags (int argc, char **argv);
static void close_files (void);
static void open_files (void);
static void open_shadow (void);
static void faillog_reset (uid_t);
static void lastlog_reset (uid_t);
static void tallylog_reset (const char *);
static void usr_update (void);
static void create_home (void);
static void create_mail (void);
/*
* fail_exit - undo as much as possible
*/
static void fail_exit (int code)
{
if (home_added) {
if (rmdir (prefix_user_home) != 0) {
fprintf (stderr,
_("%s: %s was created, but could not be removed\n"),
Prog, prefix_user_home);
SYSLOG ((LOG_ERR, "failed to remove %s", prefix_user_home));
}
}
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 ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking shadow file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
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 ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking passwd file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* 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 ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking group file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* 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 ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking gshadow file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
#endif
#ifdef ENABLE_SUBIDS
if (sub_uid_locked) {
if (sub_uid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_uid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_uid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subordinate user file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
if (sub_gid_locked) {
if (sub_gid_unlock () == 0) {
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_gid_dbname ());
SYSLOG ((LOG_ERR, "failed to unlock %s", sub_gid_dbname ()));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"unlocking subordinate group file",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
/* continue */
}
}
#endif /* ENABLE_SUBIDS */
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"adding user",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
SYSLOG ((LOG_INFO, "failed adding user '%s', data deleted", user_name));
exit (code);
}
#define MATCH(x,y) (strncmp((x),(y),strlen(y)) == 0)
/*
* get_defaults - read the defaults file
*
* get_defaults() reads the defaults file for this command. It sets the
* various values from the file, or uses built-in default values if the
* file does not exist.
*/
static void get_defaults (void)
{
FILE *fp;
char *default_file = USER_DEFAULTS_FILE;
char buf[1024];
char *cp;
if(prefix[0]) {
size_t len;
int wlen;
len = strlen(prefix) + strlen(USER_DEFAULTS_FILE) + 2;
default_file = malloc(len);
if (default_file == NULL)
return;
wlen = snprintf(default_file, len, "%s/%s", prefix, USER_DEFAULTS_FILE);
assert (wlen == (int) len -1);
}
/*
* Open the defaults file for reading.
*/
fp = fopen (default_file, "r");
if (NULL == fp) {
goto getdef_err;
}
/*
* Read the file a line at a time. Only the lines that have relevant
* values are used, everything else can be ignored.
*/
while (fgets (buf, (int) sizeof buf, fp) == buf) {
cp = strrchr (buf, '\n');
if (NULL != cp) {
*cp = '\0';
}
cp = strchr (buf, '=');
if (NULL == cp) {
continue;
}
cp++;
/*
* Primary GROUP identifier
*/
if (MATCH (buf, DGROUP)) {
const struct group *grp = prefix_getgr_nam_gid (cp);
if (NULL == grp) {
fprintf (stderr,
_("%s: group '%s' does not exist\n"),
Prog, cp);
fprintf (stderr,
_("%s: the %s configuration in %s will be ignored\n"),
Prog, DGROUP, default_file);
} else {
def_group = grp->gr_gid;
def_gname = xstrdup (grp->gr_name);
}
}
/*
* Default HOME filesystem
*/
else if (MATCH (buf, DHOME)) {
def_home = xstrdup (cp);
}
/*
* Default Login Shell command
*/
else if (MATCH (buf, DSHELL)) {
def_shell = xstrdup (cp);
}
/*
* Default Password Inactive value
*/
else if (MATCH (buf, DINACT)) {
if ( (getlong (cp, &def_inactive) == 0)
|| (def_inactive < -1)) {
fprintf (stderr,
_("%s: invalid numeric argument '%s'\n"),
Prog, cp);
fprintf (stderr,
_("%s: the %s configuration in %s will be ignored\n"),
Prog, DINACT, default_file);
def_inactive = -1;
}
}
/*
* Default account expiration date
*/
else if (MATCH (buf, DEXPIRE)) {
def_expire = xstrdup (cp);
}
/*
* Default Skeleton information
*/
else if (MATCH (buf, DSKEL)) {
if ('\0' == *cp) {
cp = SKEL_DIR; /* XXX warning: const */
}
if(prefix[0]) {
size_t len;
int wlen;
char* _def_template; /* avoid const warning */
len = strlen(prefix) + strlen(cp) + 2;
_def_template = xmalloc(len);
wlen = snprintf(_def_template, len, "%s/%s", prefix, cp);
assert (wlen == (int) len -1);
def_template = _def_template;
}
else {
def_template = xstrdup (cp);
}
}
/*
* Create by default user mail spool or not ?
*/
else if (MATCH (buf, DCREATE_MAIL_SPOOL)) {
if (*cp == '\0') {
cp = "no"; /* XXX warning: const */
}
def_create_mail_spool = xstrdup (cp);
}
}
(void) fclose (fp);
getdef_err:
if(prefix[0]) {
free(default_file);
}
}
/*
* show_defaults - show the contents of the defaults file
*
* show_defaults() displays the values that are used from the default
* file and the built-in values.
*/
static void show_defaults (void)
{
printf ("GROUP=%u\n", (unsigned int) def_group);
printf ("HOME=%s\n", def_home);
printf ("INACTIVE=%ld\n", def_inactive);
printf ("EXPIRE=%s\n", def_expire);
printf ("SHELL=%s\n", def_shell);
printf ("SKEL=%s\n", def_template);
printf ("CREATE_MAIL_SPOOL=%s\n", def_create_mail_spool);
}
/*
* set_defaults - write new defaults file
*
* set_defaults() re-writes the defaults file using the values that
* are currently set. Duplicated lines are pruned, missing lines are
* added, and unrecognized lines are copied as is.
*/
static int set_defaults (void)
{
FILE *ifp;
FILE *ofp;
char buf[1024];
char *new_file = NULL;
char *default_file = USER_DEFAULTS_FILE;
char *cp;
int ofd;
int wlen;
bool out_group = false;
bool out_home = false;
bool out_inactive = false;
bool out_expire = false;
bool out_shell = false;
bool out_skel = false;
bool out_create_mail_spool = false;
size_t len;
int ret = -1;
len = strlen(prefix) + strlen(NEW_USER_FILE) + 2;
new_file = malloc(len);
if (new_file == NULL) {
fprintf (stderr,
_("%s: cannot create new defaults file: %s\n"),
Prog, strerror(errno));
return -1;
}
wlen = snprintf(new_file, len, "%s%s%s", prefix, prefix[0]?"/":"", NEW_USER_FILE);
assert (wlen <= (int) len -1);
if(prefix[0]) {
len = strlen(prefix) + strlen(USER_DEFAULTS_FILE) + 2;
default_file = malloc(len);
if (default_file == NULL) {
fprintf (stderr,
_("%s: cannot create new defaults file: %s\n"),
Prog, strerror(errno));
goto setdef_err;
}
wlen = snprintf(default_file, len, "%s/%s", prefix, USER_DEFAULTS_FILE);
assert (wlen == (int) len -1);
}
/*
* Create a temporary file to copy the new output to.
*/
ofd = mkstemp (new_file);
if (-1 == ofd) {
fprintf (stderr,
_("%s: cannot create new defaults file\n"),
Prog);
goto setdef_err;
}
ofp = fdopen (ofd, "w");
if (NULL == ofp) {
fprintf (stderr,
_("%s: cannot open new defaults file\n"),
Prog);
goto setdef_err;
}
/*
* Open the existing defaults file and copy the lines to the
* temporary file, using any new values. Each line is checked
* to insure that it is not output more than once.
*/
ifp = fopen (default_file, "r");
if (NULL == ifp) {
fprintf (ofp, "# useradd defaults file\n");
goto skip;
}
while (fgets (buf, (int) sizeof buf, ifp) == buf) {
cp = strrchr (buf, '\n');
if (NULL != cp) {
*cp = '\0';
} else {
/* A line which does not end with \n is only valid
* at the end of the file.
*/
if (feof (ifp) == 0) {
fprintf (stderr,
_("%s: line too long in %s: %s..."),
Prog, default_file, buf);
(void) fclose (ifp);
goto setdef_err;
}
}
if (!out_group && MATCH (buf, DGROUP)) {
fprintf (ofp, DGROUP "%u\n", (unsigned int) def_group);
out_group = true;
} else if (!out_home && MATCH (buf, DHOME)) {
fprintf (ofp, DHOME "%s\n", def_home);
out_home = true;
} else if (!out_inactive && MATCH (buf, DINACT)) {
fprintf (ofp, DINACT "%ld\n", def_inactive);
out_inactive = true;
} else if (!out_expire && MATCH (buf, DEXPIRE)) {
fprintf (ofp, DEXPIRE "%s\n", def_expire);
out_expire = true;
} else if (!out_shell && MATCH (buf, DSHELL)) {
fprintf (ofp, DSHELL "%s\n", def_shell);
out_shell = true;
} else if (!out_skel && MATCH (buf, DSKEL)) {
fprintf (ofp, DSKEL "%s\n", def_template);
out_skel = true;
} else if (!out_create_mail_spool
&& MATCH (buf, DCREATE_MAIL_SPOOL)) {
fprintf (ofp,
DCREATE_MAIL_SPOOL "%s\n",
def_create_mail_spool);
out_create_mail_spool = true;
} else
fprintf (ofp, "%s\n", buf);
}
(void) fclose (ifp);
skip:
/*
* Check each line to insure that every line was output. This
* causes new values to be added to a file which did not previously
* have an entry for that value.
*/
if (!out_group)
fprintf (ofp, DGROUP "%u\n", (unsigned int) def_group);
if (!out_home)
fprintf (ofp, DHOME "%s\n", def_home);
if (!out_inactive)
fprintf (ofp, DINACT "%ld\n", def_inactive);
if (!out_expire)
fprintf (ofp, DEXPIRE "%s\n", def_expire);
if (!out_shell)
fprintf (ofp, DSHELL "%s\n", def_shell);
if (!out_skel)
fprintf (ofp, DSKEL "%s\n", def_template);
if (!out_create_mail_spool)
fprintf (ofp, DCREATE_MAIL_SPOOL "%s\n", def_create_mail_spool);
/*
* Flush and close the file. Check for errors to make certain
* the new file is intact.
*/
(void) fflush (ofp);
if ( (ferror (ofp) != 0)
|| (fsync (fileno (ofp)) != 0)
|| (fclose (ofp) != 0)) {
unlink (new_file);
goto setdef_err;
}
/*
* Rename the current default file to its backup name.
*/
wlen = snprintf (buf, sizeof buf, "%s-", default_file);
assert (wlen < (int) sizeof buf);
unlink (buf);
if ((link (default_file, buf) != 0) && (ENOENT != errno)) {
int err = errno;
fprintf (stderr,
_("%s: Cannot create backup file (%s): %s\n"),
Prog, buf, strerror (err));
unlink (new_file);
goto setdef_err;
}
/*
* Rename the new default file to its correct name.
*/
if (rename (new_file, default_file) != 0) {
int err = errno;
fprintf (stderr,
_("%s: rename: %s: %s\n"),
Prog, new_file, strerror (err));
goto setdef_err;
}
#ifdef WITH_AUDIT
audit_logger (AUDIT_USYS_CONFIG, Prog,
"changing useradd defaults",
NULL, AUDIT_NO_ID,
SHADOW_AUDIT_SUCCESS);
#endif
SYSLOG ((LOG_INFO,
"useradd defaults: GROUP=%u, HOME=%s, SHELL=%s, INACTIVE=%ld, "
"EXPIRE=%s, SKEL=%s, CREATE_MAIL_SPOOL=%s",
(unsigned int) def_group, def_home, def_shell,
def_inactive, def_expire, def_template,
def_create_mail_spool));
ret = 0;
setdef_err:
free(new_file);
if(prefix[0]) {
free(default_file);
}
return ret;
}
/*
* get_groups - convert a list of group names to an array of group IDs
*
* get_groups() takes a comma-separated list of group names and
* converts it to a NULL-terminated array. Any unknown group
* names are reported as errors.
*/
static int get_groups (char *list)
{
char *cp;
const struct group *grp;
int errors = 0;
int ngroups = 0;
if ('\0' == *list) {
return 0;
}
/*
* So long as there is some data to be converted, strip off
* each name and look it up. A mix of numerical and string
* values for group identifiers is permitted.
*/
do {
/*
* Strip off a single name from the list
*/
cp = strchr (list, ',');
if (NULL != cp) {
*cp++ = '\0';
}
/*
* Names starting with digits are treated as numerical
* GID values, otherwise the string is looked up as is.
*/
grp = prefix_getgr_nam_gid (list);
/*
* There must be a match, either by GID value or by
* string name.
* FIXME: It should exist according to gr_locate,
* otherwise, we can't change its members
*/
if (NULL == grp) {
fprintf (stderr,
_("%s: group '%s' does not exist\n"),
Prog, list);
errors++;
}
list = cp;
/*
* If the group doesn't exist, don't dump core...
* Instead, try the next one. --marekm
*/
if (NULL == grp) {
continue;
}
#ifdef USE_NIS
/*
* Don't add this group if they are an NIS group. Tell
* the user to go to the server for this group.
*/
if (__isgrNIS ()) {
fprintf (stderr,
_("%s: group '%s' is a NIS group.\n"),
Prog, grp->gr_name);
continue;
}
#endif
if (ngroups == sys_ngroups) {
fprintf (stderr,
_("%s: too many groups specified (max %d).\n"),
Prog, ngroups);
break;
}
/*
* Add the group name to the user's list of groups.
*/
user_groups[ngroups++] = xstrdup (grp->gr_name);
} while (NULL != list);
user_groups[ngroups] = (char *) 0;
/*
* Any errors in finding group names are fatal
*/
if (0 != errors) {
return -1;
}
return 0;
}
/*
* usage - display usage message and exit
*/
static void usage (int status)
{
FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
(void) fprintf (usageout,
_("Usage: %s [options] LOGIN\n"
" %s -D\n"
" %s -D [options]\n"
"\n"
"Options:\n"),
Prog, Prog, Prog);
(void) fputs (_(" --badnames do not check for bad names\n"), usageout);
(void) fputs (_(" -b, --base-dir BASE_DIR base directory for the home directory of the\n"
" new account\n"), usageout);
#ifdef WITH_BTRFS
(void) fputs (_(" --btrfs-subvolume-home use BTRFS subvolume for home directory\n"), usageout);
#endif
(void) fputs (_(" -c, --comment COMMENT GECOS field of the new account\n"), usageout);
(void) fputs (_(" -d, --home-dir HOME_DIR home directory of the new account\n"), usageout);
(void) fputs (_(" -D, --defaults print or change default useradd configuration\n"), usageout);
(void) fputs (_(" -e, --expiredate EXPIRE_DATE expiration date of the new account\n"), usageout);
(void) fputs (_(" -f, --inactive INACTIVE password inactivity period of the new account\n"), usageout);
(void) fputs (_(" -g, --gid GROUP name or ID of the primary group of the new\n"
" account\n"), usageout);
(void) fputs (_(" -G, --groups GROUPS list of supplementary groups of the new\n"
" account\n"), usageout);
(void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
(void) fputs (_(" -k, --skel SKEL_DIR use this alternative skeleton directory\n"), usageout);
(void) fputs (_(" -K, --key KEY=VALUE override /etc/login.defs defaults\n"), usageout);
(void) fputs (_(" -l, --no-log-init do not add the user to the lastlog and\n"
" faillog databases\n"), usageout);
(void) fputs (_(" -m, --create-home create the user's home directory\n"), usageout);
(void) fputs (_(" -M, --no-create-home do not create the user's home directory\n"), usageout);
(void) fputs (_(" -N, --no-user-group do not create a group with the same name as\n"
" the user\n"), usageout);
(void) fputs (_(" -o, --non-unique allow to create users with duplicate\n"
" (non-unique) UID\n"), usageout);
(void) fputs (_(" -p, --password PASSWORD encrypted password of the new account\n"), usageout);
(void) fputs (_(" -r, --system create a system account\n"), usageout);
(void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout);
(void) fputs (_(" -P, --prefix PREFIX_DIR prefix directory where are located the /etc/* files\n"), usageout);
(void) fputs (_(" -s, --shell SHELL login shell of the new account\n"), usageout);
(void) fputs (_(" -u, --uid UID user ID of the new account\n"), usageout);
(void) fputs (_(" -U, --user-group create a group with the same name as the user\n"), usageout);
#ifdef WITH_SELINUX
(void) fputs (_(" -Z, --selinux-user SEUSER use a specific SEUSER for the SELinux user mapping\n"), usageout);
#endif /* WITH_SELINUX */
(void) fputs ("\n", usageout);
exit (status);
}
/*
* new_pwent - initialize the values in a password file entry
*
* new_pwent() takes all of the values that have been entered and
* fills in a (struct passwd) with them.
*/
static void new_pwent (struct passwd *pwent)
{
memzero (pwent, sizeof *pwent);
pwent->pw_name = (char *) user_name;
if (is_shadow_pwd) {
pwent->pw_passwd = (char *) SHADOW_PASSWD_STRING;
} else {
pwent->pw_passwd = (char *) user_pass;
}
pwent->pw_uid = user_id;
pwent->pw_gid = user_gid;
pwent->pw_gecos = (char *) user_comment;
pwent->pw_dir = (char *) user_home;
pwent->pw_shell = (char *) user_shell;
}
static long scale_age (long x)
{
if (x <= 0) {
return x;
}
return x * (DAY / SCALE);
}
/*
* new_spent - initialize the values in a shadow password file entry
*
* new_spent() takes all of the values that have been entered and
* fills in a (struct spwd) with them.
*/
static void new_spent (struct spwd *spent)
{
memzero (spent, sizeof *spent);
spent->sp_namp = (char *) user_name;
spent->sp_pwdp = (char *) user_pass;
spent->sp_lstchg = (long) gettime () / SCALE;
if (0 == spent->sp_lstchg) {
/* Better disable aging than requiring a password change */
spent->sp_lstchg = -1;
}
if (!rflg) {
spent->sp_min = scale_age (getdef_num ("PASS_MIN_DAYS", -1));
spent->sp_max = scale_age (getdef_num ("PASS_MAX_DAYS", -1));
spent->sp_warn = scale_age (getdef_num ("PASS_WARN_AGE", -1));
spent->sp_inact = scale_age (def_inactive);
spent->sp_expire = scale_age (user_expire);
} else {
spent->sp_min = -1;
spent->sp_max = -1;
spent->sp_warn = -1;
spent->sp_inact = -1;
spent->sp_expire = -1;
}
spent->sp_flag = SHADOW_SP_FLAG_UNSET;
}
/*
* grp_update - add user to secondary group set
*
* grp_update() takes the secondary group set given in user_groups
* and adds the user to each group given by that set.
*
* The group files are opened and locked in open_files().
*
* close_files() should be called afterwards to commit the changes
* and unlocking the group files.
*/
static void grp_update (void)
{
const struct group *grp;
struct group *ngrp;
#ifdef SHADOWGRP
const struct sgrp *sgrp;
struct sgrp *nsgrp;
#endif
/*
* Scan through the entire group file looking for the groups that
* the user is a member of.
* FIXME: we currently do not check that all groups of user_groups
* were completed with the new user.
*/
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 (user_groups, grp->gr_name)) {
continue;
}
/*
* Make a copy - gr_update() will free() everything
* from the old entry, and we need it later.
*/
ngrp = __gr_dup (grp);
if (NULL == ngrp) {
fprintf (stderr,
_("%s: Out of memory. Cannot update %s.\n"),
Prog, gr_dbname ());
SYSLOG ((LOG_ERR, "failed to prepare the new %s entry '%s'", gr_dbname (), user_name));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"adding user to group",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);
#endif
fail_exit (E_GRP_UPDATE); /* XXX */
}
/*
* Add the username to the list of group members and
* update the group entry to reflect the change.
*/
ngrp->gr_mem = add_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);
SYSLOG ((LOG_ERR, "failed to prepare the new %s entry '%s'", gr_dbname (), user_name));
#ifdef WITH_AUDIT
audit_logger (AUDIT_ADD_USER, Prog,
"adding user to group",
user_name, AUDIT_NO_ID,
SHADOW_AUDIT_FAILURE);