summaryrefslogtreecommitdiffstats
path: root/src/useradd.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/useradd.c')
-rw-r--r--src/useradd.c2744
1 files changed, 2744 insertions, 0 deletions
diff --git a/src/useradd.c b/src/useradd.c
new file mode 100644
index 0000000..7ea0a9c
--- /dev/null
+++ b/src/useradd.c
@@ -0,0 +1,2744 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2012, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#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 <libgen.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"
+#include "run_part.h"
+#ifdef SHADOWGRP
+#include "sgroupio.h"
+#endif
+#include "shadowio.h"
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#endif /* WITH_SELINUX */
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif /* ENABLE_SUBIDS */
+#ifdef WITH_TCB
+#include "tcbfuncs.h"
+#endif
+#include "shadowlog.h"
+
+#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 = 1000;
+static const char *def_gname = "other";
+static const char *def_home = "/home";
+static const char *def_shell = "/bin/bash";
+static const char *def_template = SKEL_DIR;
+static const char *def_create_mail_spool = "yes";
+static const char *def_log_init = "yes";
+
+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 gid_t sub_gid_start; /* New subordinate gid range */
+#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 */
+#ifdef ENABLE_SUBIDS
+ Fflg = false, /* update /etc/subuid and /etc/subgid even if -r option is given */
+#endif
+ 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 or group name already in use */
+#define E_GRP_UPDATE 10 /* can't update group file */
+#define E_HOMEDIR 12 /* can't create home directory */
+#define E_MAILBOXFILE 13 /* can't create mailbox file */
+#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="
+#define DLOG_INIT "LOG_INIT="
+
+/* 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 struct group * get_local_group (char * grp_name);
+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 close_group_files (void);
+static void unlock_group_files (void);
+static void open_files (void);
+static void open_group_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 (unsigned long subuid_count, unsigned long subgid_count);
+static void create_home (void);
+static void create_mail (void);
+static void check_uid_range(int rflg, uid_t user_id);
+
+/*
+ * 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', exit code: %d", user_name, code));
+ 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);
+ }
+
+ /*
+ * By default do we add the user to the lastlog and faillog databases ?
+ */
+ else if (MATCH (buf, DLOG_INIT)) {
+ if (*cp == '\0') {
+ cp = def_log_init; /* XXX warning: const */
+ }
+ def_log_init = 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);
+ printf ("LOG_INIT=%s\n", def_log_init);
+}
+
+/*
+ * 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 *new_file_dup = 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;
+ bool out_log_init = 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);
+ }
+
+ new_file_dup = strdup(new_file);
+ if (new_file_dup == NULL) {
+ fprintf (stderr,
+ _("%s: cannot create directory for defaults file\n"),
+ Prog);
+ goto setdef_err;
+ }
+
+ ret = mkdir(dirname(new_file_dup), 0755);
+ if (-1 == ret && EEXIST != errno) {
+ fprintf (stderr,
+ _("%s: cannot create directory for defaults file\n"),
+ Prog);
+ free(new_file_dup);
+ goto setdef_err;
+ }
+ free(new_file_dup);
+
+ /*
+ * 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 if (!out_log_init
+ && MATCH (buf, DLOG_INIT)) {
+ fprintf (ofp,
+ DLOG_INIT "%s\n",
+ def_log_init);
+ out_log_init = 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);
+ if (!out_log_init)
+ fprintf (ofp, DLOG_INIT "%s\n", def_log_init);
+ /*
+ * 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, LOG_INIT=%s",
+ (unsigned int) def_group, def_home, def_shell,
+ def_inactive, def_expire, def_template,
+ def_create_mail_spool, def_log_init));
+ 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;
+ struct group *grp;
+ int errors = 0;
+ int ngroups = 0;
+
+ if ('\0' == *list) {
+ return 0;
+ }
+
+ /*
+ * Open the group files
+ */
+ open_group_files ();
+
+ /*
+ * 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 = get_local_group (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);
+ gr_free(grp);
+ continue;
+ }
+#endif
+
+ if (ngroups == sys_ngroups) {
+ fprintf (stderr,
+ _("%s: too many groups specified (max %d).\n"),
+ Prog, ngroups);
+ gr_free(grp);
+ break;
+ }
+
+ /*
+ * Add the group name to the user's list of groups.
+ */
+ user_groups[ngroups++] = xstrdup (grp->gr_name);
+ gr_free (grp);
+ } while (NULL != list);
+
+ close_group_files ();
+ unlock_group_files ();
+
+ user_groups[ngroups] = (char *) 0;
+
+ /*
+ * Any errors in finding group names are fatal
+ */
+ if (0 != errors) {
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * get_local_group - checks if a given group name exists locally
+ *
+ * get_local_group() checks if a given group name exists locally.
+ * If the name exists the group information is returned, otherwise NULL is
+ * returned.
+ */
+static struct group * get_local_group(char * grp_name)
+{
+ const struct group *grp;
+ struct group *result_grp = NULL;
+ long long int gid;
+ char *endptr;
+
+ gid = strtoll (grp_name, &endptr, 10);
+ if ( ('\0' != *grp_name)
+ && ('\0' == *endptr)
+ && (ERANGE != errno)
+ && (gid == (gid_t)gid)) {
+ grp = gr_locate_gid ((gid_t) gid);
+ }
+ else {
+ grp = gr_locate(grp_name);
+ }
+
+ if (grp != NULL) {
+ result_grp = __gr_dup (grp);
+ if (NULL == result_grp) {
+ fprintf (stderr,
+ _("%s: Out of memory. Cannot find group '%s'.\n"),
+ Prog, grp_name);
+ fail_exit (E_GRP_UPDATE);
+ }
+ }
+
+ return result_grp;
+}
+
+/*
+ * 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 (_(" --badname 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);
+#ifdef ENABLE_SUBIDS
+ (void) fputs (_(" -F, --add-subids-for-system add entries to sub[ud]id even when adding a system user\n"), usageout);
+#endif
+ (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);
+#endif
+ fail_exit (E_GRP_UPDATE);
+ }
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user to group",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ SYSLOG ((LOG_INFO,
+ "add '%s' to group '%s'",
+ user_name, ngrp->gr_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. The administrative list isn't
+ * modified.
+ */
+ for (sgr_rewind (), sgrp = sgr_next (); NULL != sgrp; sgrp = sgr_next ()) {
+
+ /*
+ * See if the user specified this group as one of their
+ * concurrent groups.
+ * FIXME: is it really needed?
+ * This would be important only if the group is in
+ * user_groups. All these groups should be checked
+ * for existence with gr_locate already.
+ */
+ if (gr_locate (sgrp->sg_name) == NULL) {
+ continue;
+ }
+
+ if (!is_on_list (user_groups, sgrp->sg_name)) {
+ continue;
+ }
+
+ /*
+ * Make a copy - sgr_update() will free() everything
+ * from the old entry, and we need it later.
+ */
+ nsgrp = __sgr_dup (sgrp);
+ if (NULL == nsgrp) {
+ fprintf (stderr,
+ _("%s: Out of memory. Cannot update %s.\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_ERR, "failed to prepare the new %s entry '%s'", sgr_dbname (), user_name));
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user to shadow 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.
+ */
+ nsgrp->sg_mem = add_list (nsgrp->sg_mem, 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);
+ SYSLOG ((LOG_ERR, "failed to prepare the new %s entry '%s'", sgr_dbname (), user_name));
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user to shadow group",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_GRP_UPDATE);
+ }
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user to shadow group",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ SYSLOG ((LOG_INFO,
+ "add '%s' to shadow group '%s'",
+ user_name, nsgrp->sg_name));
+ }
+#endif /* SHADOWGRP */
+}
+
+/*
+ * process_flags - perform command line argument setting
+ *
+ * process_flags() interprets the command line arguments and sets
+ * the values that the user will be created with accordingly. The
+ * values are checked for sanity.
+ */
+static void process_flags (int argc, char **argv)
+{
+ const struct group *grp;
+ bool anyflag = false;
+ char *cp;
+ struct stat st;
+
+ {
+ /*
+ * Parse the command line options.
+ */
+ int c;
+ static struct option long_options[] = {
+ {"base-dir", required_argument, NULL, 'b'},
+#ifdef WITH_BTRFS
+ {"btrfs-subvolume-home", no_argument, NULL, 200},
+#endif
+ {"badname", no_argument, NULL, 201},
+ {"comment", required_argument, NULL, 'c'},
+ {"home-dir", required_argument, NULL, 'd'},
+ {"defaults", no_argument, NULL, 'D'},
+ {"expiredate", required_argument, NULL, 'e'},
+ {"inactive", required_argument, NULL, 'f'},
+#ifdef ENABLE_SUBIDS
+ {"add-subids-for-system", no_argument,NULL, 'F'},
+#endif
+ {"gid", required_argument, NULL, 'g'},
+ {"groups", required_argument, NULL, 'G'},
+ {"help", no_argument, NULL, 'h'},
+ {"skel", required_argument, NULL, 'k'},
+ {"key", required_argument, NULL, 'K'},
+ {"no-log-init", no_argument, NULL, 'l'},
+ {"create-home", no_argument, NULL, 'm'},
+ {"no-create-home", no_argument, NULL, 'M'},
+ {"no-user-group", no_argument, NULL, 'N'},
+ {"non-unique", no_argument, NULL, 'o'},
+ {"password", required_argument, NULL, 'p'},
+ {"system", no_argument, NULL, 'r'},
+ {"root", required_argument, NULL, 'R'},
+ {"prefix", required_argument, NULL, 'P'},
+ {"shell", required_argument, NULL, 's'},
+ {"uid", required_argument, NULL, 'u'},
+ {"user-group", no_argument, NULL, 'U'},
+#ifdef WITH_SELINUX
+ {"selinux-user", required_argument, NULL, 'Z'},
+#endif /* WITH_SELINUX */
+ {NULL, 0, NULL, '\0'}
+ };
+ while ((c = getopt_long (argc, argv,
+ "b:c:d:De:f:g:G:hk:K:lmMNop:rR:P:s:u:U"
+#ifdef WITH_SELINUX
+ "Z:"
+#endif /* WITH_SELINUX */
+#ifdef ENABLE_SUBIDS
+ "F"
+#endif /* ENABLE_SUBIDS */
+ "",
+ long_options, NULL)) != -1) {
+ switch (c) {
+ case 'b':
+ if ( ( !VALID (optarg) )
+ || ( optarg[0] != '/' )) {
+ fprintf (stderr,
+ _("%s: invalid base directory '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ def_home = optarg;
+ bflg = true;
+ break;
+ case 200:
+ subvolflg = true;
+ break;
+ case 201:
+ allow_bad_names = true;
+ break;
+ case 'c':
+ if (!VALID (optarg)) {
+ fprintf (stderr,
+ _("%s: invalid comment '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ user_comment = optarg;
+ cflg = true;
+ break;
+ case 'd':
+ if ( ( !VALID (optarg) )
+ || ( optarg[0] != '/' )) {
+ fprintf (stderr,
+ _("%s: invalid home directory '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ user_home = optarg;
+ dflg = true;
+ break;
+ case 'D':
+ if (anyflag) {
+ usage (E_USAGE);
+ }
+ Dflg = true;
+ break;
+ case 'e':
+ if ('\0' != *optarg) {
+ user_expire = strtoday (optarg);
+ if (user_expire < -1) {
+ fprintf (stderr,
+ _("%s: invalid date '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ } else {
+ user_expire = -1;
+ }
+
+ /*
+ * -e "" is allowed without /etc/shadow
+ * (it's a no-op in such case)
+ */
+ if ((-1 != user_expire) && !is_shadow_pwd) {
+ fprintf (stderr,
+ _("%s: shadow passwords required for -e\n"),
+ Prog);
+ exit (E_USAGE);
+ }
+ if (Dflg) {
+ def_expire = optarg;
+ }
+ eflg = true;
+ break;
+ case 'f':
+ if ( (getlong (optarg, &def_inactive) == 0)
+ || (def_inactive < -1)) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ /*
+ * -f -1 is allowed
+ * it's a no-op without /etc/shadow
+ */
+ if ((-1 != def_inactive) && !is_shadow_pwd) {
+ fprintf (stderr,
+ _("%s: shadow passwords required for -f\n"),
+ Prog);
+ exit (E_USAGE);
+ }
+ fflg = true;
+ break;
+#ifdef ENABLE_SUBIDS
+ case 'F':
+ Fflg = true;
+ break;
+#endif
+ case 'g':
+ grp = prefix_getgr_nam_gid (optarg);
+ if (NULL == grp) {
+ fprintf (stderr,
+ _("%s: group '%s' does not exist\n"),
+ Prog, optarg);
+ exit (E_NOTFOUND);
+ }
+ if (Dflg) {
+ def_group = grp->gr_gid;
+ def_gname = optarg;
+ } else {
+ user_gid = grp->gr_gid;
+ }
+ gflg = true;
+ break;
+ case 'G':
+ if (get_groups (optarg) != 0) {
+ exit (E_NOTFOUND);
+ }
+ if (NULL != user_groups[0]) {
+ do_grp_update = true;
+ }
+ Gflg = true;
+ break;
+ case 'h':
+ usage (E_SUCCESS);
+ break;
+ case 'k':
+ def_template = optarg;
+ kflg = true;
+ break;
+ case 'K':
+ /*
+ * override login.defs defaults (-K name=value)
+ * example: -K UID_MIN=100 -K UID_MAX=499
+ * note: -K UID_MIN=10,UID_MAX=499 doesn't work yet
+ */
+ cp = strchr (optarg, '=');
+ if (NULL == cp) {
+ fprintf (stderr,
+ _("%s: -K requires KEY=VALUE\n"),
+ Prog);
+ exit (E_BAD_ARG);
+ }
+ /* terminate name, point to value */
+ *cp = '\0';
+ cp++;
+ if (putdef_str (optarg, cp) < 0) {
+ exit (E_BAD_ARG);
+ }
+ break;
+ case 'l':
+ lflg = true;
+ break;
+ case 'm':
+ mflg = true;
+ break;
+ case 'M':
+ Mflg = true;
+ break;
+ case 'N':
+ Nflg = true;
+ break;
+ case 'o':
+ oflg = true;
+ break;
+ case 'p': /* set encrypted password */
+ if (!VALID (optarg)) {
+ fprintf (stderr,
+ _("%s: invalid field '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ user_pass = optarg;
+ break;
+ case 'r':
+ rflg = true;
+ break;
+ case 'R': /* no-op, handled in process_root_flag () */
+ break;
+ case 'P': /* no-op, handled in process_prefix_flag () */
+ break;
+ case 's':
+ if ( ( !VALID (optarg) )
+ || ( ('\0' != optarg[0])
+ && ('/' != optarg[0])
+ && ('*' != optarg[0]) )) {
+ fprintf (stderr,
+ _("%s: invalid shell '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ if ( '\0' != optarg[0]
+ && '*' != optarg[0]
+ && strcmp(optarg, "/sbin/nologin") != 0
+ && ( stat(optarg, &st) != 0
+ || S_ISDIR(st.st_mode)
+ || access(optarg, X_OK) != 0)) {
+ fprintf (stderr,
+ _("%s: Warning: missing or non-executable shell '%s'\n"),
+ Prog, optarg);
+ }
+ user_shell = optarg;
+ def_shell = optarg;
+ sflg = true;
+ break;
+ case 'u':
+ if ( (get_uid (optarg, &user_id) == 0)
+ || (user_id == (gid_t)-1)) {
+ fprintf (stderr,
+ _("%s: invalid user ID '%s'\n"),
+ Prog, optarg);
+ exit (E_BAD_ARG);
+ }
+ uflg = true;
+ break;
+ case 'U':
+ Uflg = true;
+ break;
+#ifdef WITH_SELINUX
+ case 'Z':
+ if (prefix[0]) {
+ fprintf (stderr,
+ _("%s: -Z cannot be used with --prefix\n"),
+ Prog);
+ exit (E_BAD_ARG);
+ }
+ if (is_selinux_enabled () > 0) {
+ user_selinux = optarg;
+ } else {
+ fprintf (stderr,
+ _("%s: -Z requires SELinux enabled kernel\n"),
+ Prog);
+
+ exit (E_BAD_ARG);
+ }
+ break;
+#endif /* WITH_SELINUX */
+ default:
+ usage (E_USAGE);
+ }
+ anyflag = true;
+ }
+ }
+
+ if (!gflg && !Nflg && !Uflg) {
+ /* Get the settings from login.defs */
+ Uflg = getdef_bool ("USERGROUPS_ENAB");
+ }
+
+ /*
+ * Certain options are only valid in combination with others.
+ * Check it here so that they can be specified in any order.
+ */
+ if (oflg && !uflg) {
+ fprintf (stderr,
+ _("%s: %s flag is only allowed with the %s flag\n"),
+ Prog, "-o", "-u");
+ usage (E_USAGE);
+ }
+ if (kflg && !mflg) {
+ fprintf (stderr,
+ _("%s: %s flag is only allowed with the %s flag\n"),
+ Prog, "-k", "-m");
+ usage (E_USAGE);
+ }
+ if (Uflg && gflg) {
+ fprintf (stderr,
+ _("%s: options %s and %s conflict\n"),
+ Prog, "-U", "-g");
+ usage (E_USAGE);
+ }
+ if (Uflg && Nflg) {
+ fprintf (stderr,
+ _("%s: options %s and %s conflict\n"),
+ Prog, "-U", "-N");
+ usage (E_USAGE);
+ }
+ if (mflg && Mflg) {
+ fprintf (stderr,
+ _("%s: options %s and %s conflict\n"),
+ Prog, "-m", "-M");
+ usage (E_USAGE);
+ }
+
+ /*
+ * Either -D or username is required. Defaults can be set with -D
+ * for the -b, -e, -f, -g, -s options only.
+ */
+ if (Dflg) {
+ if (optind != argc) {
+ usage (E_USAGE);
+ }
+
+ if (uflg || Gflg || dflg || cflg || mflg) {
+ usage (E_USAGE);
+ }
+ } else {
+ if (optind != argc - 1) {
+ usage (E_USAGE);
+ }
+
+ user_name = argv[optind];
+ if (!is_valid_user_name (user_name)) {
+ fprintf (stderr,
+ _("%s: invalid user name '%s': use --badname to ignore\n"),
+ Prog, user_name);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ exit (E_BAD_ARG);
+ }
+ if (!dflg) {
+ char *uh;
+ size_t len = strlen (def_home) + strlen (user_name) + 2;
+ int wlen;
+
+ uh = xmalloc (len);
+ wlen = snprintf (uh, len, "%s/%s", def_home, user_name);
+ assert (wlen == (int) len -1);
+
+ user_home = uh;
+ }
+ if (prefix[0]) {
+ size_t len = strlen(prefix) + strlen(user_home) + 2;
+ int wlen;
+ char* _prefix_user_home; /* to avoid const warning */
+ _prefix_user_home = xmalloc(len);
+ wlen = snprintf(_prefix_user_home, len, "%s/%s", prefix, user_home);
+ assert (wlen == (int) len -1);
+ prefix_user_home = _prefix_user_home;
+ }
+ else {
+ prefix_user_home = user_home;
+ }
+ }
+
+ if (!eflg) {
+ user_expire = strtoday (def_expire);
+ }
+
+ if (!gflg) {
+ user_gid = def_group;
+ }
+
+ if (!sflg) {
+ user_shell = def_shell;
+ }
+
+ create_mail_spool = def_create_mail_spool;
+
+ if (!lflg) {
+ /* If we are missing the flag lflg aka -l, check the defaults
+ * file to see if we need to disable it as a default*/
+ if (strcmp (def_log_init, "no") == 0) {
+ lflg = true;
+ }
+ }
+
+ if (!rflg) {
+ /* for system accounts defaults are ignored and we
+ * do not create a home dir */
+ if (getdef_bool ("CREATE_HOME")) {
+ mflg = true;
+ }
+ }
+
+ if (Mflg) {
+ /* absolutely sure that we do not create home dirs */
+ mflg = false;
+ }
+}
+
+/*
+ * 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 (is_shadow_pwd && (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);
+ }
+
+ close_group_files ();
+
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid && (sub_uid_close () == 0)) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"), Prog, sub_uid_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_uid_dbname ()));
+ fail_exit (E_SUB_UID_UPDATE);
+ }
+ if (is_sub_gid && (sub_gid_close () == 0)) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"), Prog, sub_gid_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_gid_dbname ()));
+ fail_exit (E_SUB_GID_UPDATE);
+ }
+#endif /* ENABLE_SUBIDS */
+ if (is_shadow_pwd) {
+ 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 */
+ }
+ spw_locked = false;
+ }
+ 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 */
+ }
+ pw_locked = false;
+
+ unlock_group_files ();
+
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid) {
+ 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 */
+ }
+ sub_uid_locked = false;
+ }
+ if (is_sub_gid) {
+ 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 */
+ }
+ sub_gid_locked = false;
+ }
+#endif /* ENABLE_SUBIDS */
+}
+
+/*
+ * close_group_files - close all of the files that were opened
+ *
+ * close_group_files() closes all of the files that were opened related
+ * with groups. This causes any modified entries to be written out.
+ */
+static void close_group_files (void)
+{
+ if (do_grp_update) {
+ 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);
+ }
+#ifdef SHADOWGRP
+ if (is_shadow_grp && (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);
+ }
+#endif /* SHADOWGRP */
+ }
+}
+
+/*
+ * unlock_group_files - unlock all of the files that were locked
+ *
+ * unlock_group_files() unlocks all of the files that were locked related
+ * with groups. This causes any modified entries to be written out.
+ */
+static void unlock_group_files (void)
+{
+ 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 /* WITH_AUDIT */
+ /* continue */
+ }
+ gr_locked = false;
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ 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 /* WITH_AUDIT */
+ /* continue */
+ }
+ sgr_locked = false;
+ }
+#endif /* SHADOWGRP */
+}
+
+/*
+ * 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 ());
+ exit (E_PW_UPDATE);
+ }
+ pw_locked = true;
+ if (pw_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
+ fail_exit (E_PW_UPDATE);
+ }
+
+ /* shadow file will be opened by open_shadow(); */
+
+ open_group_files ();
+
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid) {
+ if (sub_uid_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (E_SUB_UID_UPDATE);
+ }
+ sub_uid_locked = true;
+ if (sub_uid_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (E_SUB_UID_UPDATE);
+ }
+ }
+ if (is_sub_gid) {
+ if (sub_gid_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sub_gid_dbname ());
+ fail_exit (E_SUB_GID_UPDATE);
+ }
+ sub_gid_locked = true;
+ if (sub_gid_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sub_gid_dbname ());
+ fail_exit (E_SUB_GID_UPDATE);
+ }
+ }
+#endif /* ENABLE_SUBIDS */
+}
+
+static void open_group_files (void)
+{
+ if (gr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, gr_dbname ());
+ fail_exit (E_GRP_UPDATE);
+ }
+ gr_locked = true;
+ if (gr_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
+ 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 ());
+ fail_exit (E_GRP_UPDATE);
+ }
+ sgr_locked = true;
+ if (sgr_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sgr_dbname ());
+ fail_exit (E_GRP_UPDATE);
+ }
+ }
+#endif /* SHADOWGRP */
+}
+
+static void open_shadow (void)
+{
+ if (!is_shadow_pwd) {
+ return;
+ }
+ if (spw_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, spw_dbname ());
+ fail_exit (E_PW_UPDATE);
+ }
+ spw_locked = true;
+ if (spw_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, spw_dbname ());
+ fail_exit (E_PW_UPDATE);
+ }
+}
+
+static char *empty_list = NULL;
+
+/*
+ * new_grent - initialize the values in a group file entry
+ *
+ * new_grent() takes all of the values that have been entered and fills
+ * in a (struct group) with them.
+ */
+
+static void new_grent (struct group *grent)
+{
+ memzero (grent, sizeof *grent);
+ grent->gr_name = (char *) user_name;
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ grent->gr_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+ } else
+#endif /* SHADOWGRP */
+ {
+ grent->gr_passwd = "!"; /* XXX warning: const */
+ }
+ grent->gr_gid = user_gid;
+ grent->gr_mem = &empty_list;
+}
+
+#ifdef SHADOWGRP
+/*
+ * new_sgent - initialize the values in a shadow group file entry
+ *
+ * new_sgent() takes all of the values that have been entered and fills
+ * in a (struct sgrp) with them.
+ */
+
+static void new_sgent (struct sgrp *sgent)
+{
+ memzero (sgent, sizeof *sgent);
+ sgent->sg_name = (char *) user_name;
+ sgent->sg_passwd = "!"; /* XXX warning: const */
+ sgent->sg_adm = &empty_list;
+ sgent->sg_mem = &empty_list;
+}
+#endif /* SHADOWGRP */
+
+
+/*
+ * grp_add - add new group file entries
+ *
+ * grp_add() writes the new records to the group files.
+ */
+
+static void grp_add (void)
+{
+ struct group grp;
+
+#ifdef SHADOWGRP
+ struct sgrp sgrp;
+#endif /* SHADOWGRP */
+
+ /*
+ * Create the initial entries for this new group.
+ */
+ new_grent (&grp);
+#ifdef SHADOWGRP
+ new_sgent (&sgrp);
+#endif /* SHADOWGRP */
+
+ /*
+ * Write out the new group file entry.
+ */
+ if (gr_update (&grp) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, gr_dbname (), grp.gr_name);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "adding group",
+ grp.gr_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_GRP_UPDATE);
+ }
+#ifdef SHADOWGRP
+ /*
+ * Write out the new shadow group entries as well.
+ */
+ if (is_shadow_grp && (sgr_update (&sgrp) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, sgr_dbname (), sgrp.sg_name);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "adding group",
+ grp.gr_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_GRP_UPDATE);
+ }
+#endif /* SHADOWGRP */
+ SYSLOG ((LOG_INFO, "new group: name=%s, GID=%u", user_name, user_gid));
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_GROUP, Prog,
+ "adding group",
+ grp.gr_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ do_grp_update = true;
+}
+
+static void faillog_reset (uid_t uid)
+{
+ struct faillog fl;
+ int fd;
+ off_t offset_uid = (off_t) (sizeof fl) * uid;
+ struct stat st;
+
+ if (stat (FAILLOG_FILE, &st) != 0 || st.st_size <= offset_uid) {
+ return;
+ }
+
+ memzero (&fl, sizeof (fl));
+
+ fd = open (FAILLOG_FILE, O_RDWR);
+ if (-1 == fd) {
+ fprintf (stderr,
+ _("%s: failed to open the faillog file for UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to open the faillog file for UID %lu", (unsigned long) uid));
+ return;
+ }
+ if ( (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+ || (write (fd, &fl, sizeof (fl)) != (ssize_t) sizeof (fl))
+ || (fsync (fd) != 0)) {
+ fprintf (stderr,
+ _("%s: failed to reset the faillog entry of UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to reset the faillog entry of UID %lu", (unsigned long) uid));
+ }
+ if (close (fd) != 0) {
+ fprintf (stderr,
+ _("%s: failed to close the faillog file for UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to close the faillog file for UID %lu", (unsigned long) uid));
+ }
+}
+
+static void lastlog_reset (uid_t uid)
+{
+ struct lastlog ll;
+ int fd;
+ off_t offset_uid = (off_t) (sizeof ll) * uid;
+ uid_t max_uid;
+ struct stat st;
+
+ if (stat (LASTLOG_FILE, &st) != 0 || st.st_size <= offset_uid) {
+ return;
+ }
+
+ max_uid = (uid_t) getdef_ulong ("LASTLOG_UID_MAX", 0xFFFFFFFFUL);
+ if (uid > max_uid) {
+ /* do not touch lastlog for large uids */
+ return;
+ }
+
+ memzero (&ll, sizeof (ll));
+
+ fd = open (LASTLOG_FILE, O_RDWR);
+ if (-1 == fd) {
+ fprintf (stderr,
+ _("%s: failed to open the lastlog file for UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to open the lastlog file for UID %lu", (unsigned long) uid));
+ return;
+ }
+ if ( (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+ || (write (fd, &ll, sizeof (ll)) != (ssize_t) sizeof (ll))
+ || (fsync (fd) != 0)) {
+ fprintf (stderr,
+ _("%s: failed to reset the lastlog entry of UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to reset the lastlog entry of UID %lu", (unsigned long) uid));
+ /* continue */
+ }
+ if (close (fd) != 0) {
+ fprintf (stderr,
+ _("%s: failed to close the lastlog file for UID %lu: %s\n"),
+ Prog, (unsigned long) uid, strerror (errno));
+ SYSLOG ((LOG_WARN, "failed to close the lastlog file for UID %lu", (unsigned long) uid));
+ /* continue */
+ }
+}
+
+static void tallylog_reset (const char *user_name)
+{
+ const char pam_tally2[] = "/sbin/pam_tally2";
+ const char *pname;
+ pid_t childpid;
+ int failed;
+ int status;
+
+ if (access(pam_tally2, X_OK) == -1)
+ return;
+
+ failed = 0;
+ switch (childpid = fork())
+ {
+ case -1: /* error */
+ failed = 1;
+ break;
+ case 0: /* child */
+ pname = strrchr(pam_tally2, '/');
+ if (pname == NULL)
+ pname = pam_tally2;
+ else
+ pname++; /* Skip the '/' */
+ execl(pam_tally2, pname, "--user", user_name, "--reset", "--quiet", NULL);
+ /* If we come here, something has gone terribly wrong */
+ perror(pam_tally2);
+ exit(42); /* don't continue, we now have 2 processes running! */
+ /* NOTREACHED */
+ break;
+ default: /* parent */
+ if (waitpid(childpid, &status, 0) == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ failed = 1;
+ break;
+ }
+
+ if (failed)
+ {
+ fprintf (stderr,
+ _("%s: failed to reset the tallylog entry of user \"%s\"\n"),
+ Prog, user_name);
+ SYSLOG ((LOG_WARN, "failed to reset the tallylog entry of user \"%s\"", user_name));
+ }
+
+ return;
+}
+
+/*
+ * usr_update - create the user entries
+ *
+ * usr_update() creates the password file entries for this user
+ * and will update the group entries if required.
+ */
+static void usr_update (unsigned long subuid_count, unsigned long subgid_count)
+{
+ struct passwd pwent;
+ struct spwd spent;
+ char *tty;
+
+ /*
+ * Fill in the password structure with any new fields, making
+ * copies of strings.
+ */
+ new_pwent (&pwent);
+ new_spent (&spent);
+
+ /*
+ * Create a syslog entry. We need to do this now in case anything
+ * happens so we know what we were trying to accomplish.
+ */
+ tty=ttyname (STDIN_FILENO);
+ SYSLOG ((LOG_INFO,
+ "new user: name=%s, UID=%u, GID=%u, home=%s, shell=%s, from=%s",
+ user_name, (unsigned int) user_id,
+ (unsigned int) user_gid, user_home, user_shell,
+ tty ? tty : "none" ));
+
+ /*
+ * Initialize faillog and lastlog entries for this UID in case
+ * it belongs to a previously deleted user. We do it only if
+ * no user with this UID exists yet (entries for shared UIDs
+ * are left unchanged). --marekm
+ */
+ /* local, no need for xgetpwuid */
+ if ((!lflg) && (prefix_getpwuid (user_id) == NULL)) {
+ faillog_reset (user_id);
+ lastlog_reset (user_id);
+ }
+
+ /*
+ * Put the new (struct passwd) in the table.
+ */
+ if (pw_update (&pwent) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, pw_dbname (), pwent.pw_name);
+ fail_exit (E_PW_UPDATE);
+ }
+
+ /*
+ * Put the new (struct spwd) in the table.
+ */
+ if (is_shadow_pwd && (spw_update (&spent) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"),
+ Prog, spw_dbname (), spent.sp_namp);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding shadow password",
+ user_name, (unsigned int) user_id,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_PW_UPDATE);
+ }
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid &&
+ (sub_uid_add(user_name, sub_uid_start, subuid_count) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (E_SUB_UID_UPDATE);
+ }
+ if (is_sub_gid &&
+ (sub_gid_add(user_name, sub_gid_start, subgid_count) == 0)) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (E_SUB_GID_UPDATE);
+ }
+#endif /* ENABLE_SUBIDS */
+
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user",
+ user_name, (unsigned int) user_id,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+ /*
+ * Do any group file updates for this user.
+ */
+ if (do_grp_update) {
+ grp_update ();
+ }
+}
+
+/*
+ * create_home - create the user's home directory
+ *
+ * create_home() creates the user's home directory if it does not
+ * already exist. It will be created mode 755 owned by the user
+ * with the user's default group.
+ */
+static void create_home (void)
+{
+ if (access (prefix_user_home, F_OK) != 0) {
+ char path[strlen (prefix_user_home) + 2];
+ char *bhome, *cp;
+
+ path[0] = '\0';
+ bhome = strdup (prefix_user_home);
+ if (!bhome) {
+ fprintf (stderr,
+ _("%s: error while duplicating string %s\n"),
+ Prog, user_home);
+ fail_exit (E_HOMEDIR);
+ }
+
+#ifdef WITH_SELINUX
+ if (set_selinux_file_context (prefix_user_home, S_IFDIR) != 0) {
+ fprintf (stderr,
+ _("%s: cannot set SELinux context for home directory %s\n"),
+ Prog, user_home);
+ fail_exit (E_HOMEDIR);
+ }
+#endif
+
+ /* Check for every part of the path, if the directory
+ exists. If not, create it with permissions 755 and
+ owner root:root.
+ */
+ cp = strtok (bhome, "/");
+ while (cp) {
+ /* Avoid turning a relative path into an absolute path.
+ */
+ if (bhome[0] == '/' || strlen (path) != 0) {
+ strcat (path, "/");
+ }
+ strcat (path, cp);
+ if (access (path, F_OK) != 0) {
+ /* Check if parent directory is BTRFS, fail if requesting
+ subvolume but no BTRFS. The paths cound be different by the
+ trailing slash
+ */
+#if WITH_BTRFS
+ if (subvolflg && (strlen(prefix_user_home) - (int)strlen(path)) <= 1) {
+ char *btrfs_check = strdup(path);
+
+ if (!btrfs_check) {
+ fprintf (stderr,
+ _("%s: error while duplicating string in BTRFS check %s\n"),
+ Prog, path);
+ fail_exit (E_HOMEDIR);
+ }
+ btrfs_check[strlen(path) - strlen(cp) - 1] = '\0';
+ if (is_btrfs(btrfs_check) <= 0) {
+ fprintf (stderr,
+ _("%s: home directory \"%s\" must be mounted on BTRFS\n"),
+ Prog, path);
+ fail_exit (E_HOMEDIR);
+ }
+ // make subvolume to mount for user instead of directory
+ if (btrfs_create_subvolume(path)) {
+ fprintf (stderr,
+ _("%s: failed to create BTRFS subvolume: %s\n"),
+ Prog, path);
+ fail_exit (E_HOMEDIR);
+ }
+ }
+ else
+#endif
+ if (mkdir (path, 0) != 0) {
+ fprintf (stderr,
+ _("%s: cannot create directory %s\n"),
+ Prog, path);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding home directory",
+ user_name, (unsigned int) user_id,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_HOMEDIR);
+ }
+ if (chown (path, 0, 0) < 0) {
+ fprintf (stderr,
+ _("%s: warning: chown on `%s' failed: %m\n"),
+ Prog, path);
+ }
+ if (chmod (path, 0755) < 0) {
+ fprintf (stderr,
+ _("%s: warning: chmod on `%s' failed: %m\n"),
+ Prog, path);
+ }
+ }
+ cp = strtok (NULL, "/");
+ }
+ free (bhome);
+
+ (void) chown (prefix_user_home, user_id, user_gid);
+ mode_t mode = getdef_num ("HOME_MODE",
+ 0777 & ~getdef_num ("UMASK", GETDEF_DEFAULT_UMASK));
+ if (chmod (prefix_user_home, mode)) {
+ fprintf (stderr, _("%s: warning: chown on '%s' failed: %m\n"),
+ Prog, path);
+ }
+ home_added = true;
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding home directory",
+ user_name, (unsigned int) user_id,
+ SHADOW_AUDIT_SUCCESS);
+#endif
+#ifdef WITH_SELINUX
+ /* Reset SELinux to create files with default contexts */
+ if (reset_selinux_file_context () != 0) {
+ fprintf (stderr,
+ _("%s: cannot reset SELinux file creation context\n"),
+ Prog);
+ fail_exit (E_HOMEDIR);
+ }
+#endif
+ }
+}
+
+/*
+ * create_mail - create the user's mail spool
+ *
+ * create_mail() creates the user's mail spool if it does not already
+ * exist. It will be created mode 660 owned by the user and group
+ * 'mail'
+ */
+static void create_mail (void)
+{
+ if (strcasecmp (create_mail_spool, "yes") == 0) {
+ const char *spool;
+ char *file;
+ int fd;
+ struct group *gr;
+ gid_t gid;
+ mode_t mode;
+
+ spool = getdef_str ("MAIL_DIR");
+#ifdef MAIL_SPOOL_DIR
+ if ((NULL == spool) && (getdef_str ("MAIL_FILE") == NULL)) {
+ spool = MAIL_SPOOL_DIR;
+ }
+#endif /* MAIL_SPOOL_DIR */
+ if (NULL == spool) {
+ return;
+ }
+ file = alloca (strlen (prefix) + strlen (spool) + strlen (user_name) + 3);
+ if (prefix[0])
+ sprintf (file, "%s/%s/%s", prefix, spool, user_name);
+ else
+ sprintf (file, "%s/%s", spool, user_name);
+
+#ifdef WITH_SELINUX
+ if (set_selinux_file_context (file, S_IFREG) != 0) {
+ fprintf (stderr,
+ _("%s: cannot set SELinux context for mailbox file %s\n"),
+ Prog, file);
+ fail_exit (E_MAILBOXFILE);
+ }
+#endif
+
+ fd = open (file, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0);
+ if (fd < 0) {
+ perror (_("Creating mailbox file"));
+ return;
+ }
+
+ gr = prefix_getgrnam ("mail"); /* local, no need for xgetgrnam */
+ if (NULL == gr) {
+ fputs (_("Group 'mail' not found. Creating the user mailbox file with 0600 mode.\n"),
+ stderr);
+ gid = user_gid;
+ mode = 0600;
+ } else {
+ gid = gr->gr_gid;
+ mode = 0660;
+ }
+
+ if ( (fchown (fd, user_id, gid) != 0)
+ || (fchmod (fd, mode) != 0)) {
+ perror (_("Setting mailbox file permissions"));
+ }
+
+ fsync (fd);
+ close (fd);
+#ifdef WITH_SELINUX
+ /* Reset SELinux to create files with default contexts */
+ if (reset_selinux_file_context () != 0) {
+ fprintf (stderr,
+ _("%s: cannot reset SELinux file creation context\n"),
+ Prog);
+ fail_exit (E_MAILBOXFILE);
+ }
+#endif
+ }
+}
+
+static void check_uid_range(int rflg, uid_t user_id)
+{
+ uid_t uid_min ;
+ uid_t uid_max ;
+ if (rflg) {
+ uid_max = (uid_t)getdef_ulong("SYS_UID_MAX",getdef_ulong("UID_MIN",1000UL)-1);
+ if (user_id > uid_max) {
+ fprintf(stderr, _("%s warning: %s's uid %d is greater than SYS_UID_MAX %d\n"), Prog, user_name, user_id, uid_max);
+ }
+ }else{
+ uid_min = (uid_t)getdef_ulong("UID_MIN", 1000UL);
+ uid_max = (uid_t)getdef_ulong("UID_MAX", 6000UL);
+ if (uid_min <= uid_max) {
+ if (user_id < uid_min || user_id >uid_max)
+ fprintf(stderr, _("%s warning: %s's uid %d outside of the UID_MIN %d and UID_MAX %d range.\n"), Prog, user_name, user_id, uid_min, uid_max);
+ }
+ }
+
+}
+/*
+ * main - useradd command
+ */
+int main (int argc, char **argv)
+{
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+ pam_handle_t *pamh = NULL;
+ int retval;
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+
+#ifdef ENABLE_SUBIDS
+ uid_t uid_min;
+ uid_t uid_max;
+#endif
+ unsigned long subuid_count = 0;
+ unsigned long subgid_count = 0;
+
+ /*
+ * Get my name so that I can use it to report errors.
+ */
+ Prog = Basename (argv[0]);
+ log_set_progname(Prog);
+ log_set_logfd(stderr);
+
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ process_root_flag ("-R", argc, argv);
+
+ prefix = process_prefix_flag("-P", argc, argv);
+
+ OPENLOG ("useradd");
+#ifdef WITH_AUDIT
+ audit_help_open ();
+#endif
+
+ sys_ngroups = sysconf (_SC_NGROUPS_MAX);
+ user_groups = (char **) xmalloc ((1 + sys_ngroups) * sizeof (char *));
+ /*
+ * Initialize the list to be empty
+ */
+ user_groups[0] = (char *) 0;
+
+
+ is_shadow_pwd = spw_file_present ();
+#ifdef SHADOWGRP
+ is_shadow_grp = sgr_file_present ();
+#endif
+
+ get_defaults ();
+
+ process_flags (argc, argv);
+
+#ifdef ENABLE_SUBIDS
+ uid_min = (uid_t) getdef_ulong ("UID_MIN", 1000UL);
+ uid_max = (uid_t) getdef_ulong ("UID_MAX", 60000UL);
+ subuid_count = getdef_ulong ("SUB_UID_COUNT", 65536);
+ subgid_count = getdef_ulong ("SUB_GID_COUNT", 65536);
+ is_sub_uid = subuid_count > 0 && sub_uid_file_present () &&
+ (!rflg || Fflg) &&
+ (!user_id || (user_id <= uid_max && user_id >= uid_min));
+ is_sub_gid = subgid_count > 0 && sub_gid_file_present () &&
+ (!rflg || Fflg) &&
+ (!user_id || (user_id <= uid_max && user_id >= uid_min));
+#endif /* ENABLE_SUBIDS */
+
+ if (run_parts ("/etc/shadow-maint/useradd-pre.d", user_name,
+ "useradd")) {
+ exit(1);
+ }
+
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+ {
+ struct passwd *pampw;
+ pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+ if (pampw == NULL && getuid ()) {
+ fprintf (stderr,
+ _("%s: Cannot determine your user name.\n"),
+ Prog);
+ fail_exit (1);
+ }
+
+ retval = pam_start ("useradd", pampw?pampw->pw_name:"root", &conv, &pamh);
+ }
+
+ if (PAM_SUCCESS == retval) {
+ retval = pam_authenticate (pamh, 0);
+ }
+
+ if (PAM_SUCCESS == retval) {
+ retval = pam_acct_mgmt (pamh, 0);
+ }
+
+ if (PAM_SUCCESS != retval) {
+ fprintf (stderr, _("%s: PAM: %s\n"),
+ Prog, pam_strerror (pamh, retval));
+ SYSLOG((LOG_ERR, "%s", pam_strerror (pamh, retval)));
+ if (NULL != pamh) {
+ (void) pam_end (pamh, retval);
+ }
+ fail_exit (1);
+ }
+ (void) pam_end (pamh, retval);
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+
+ /*
+ * See if we are messing with the defaults file, or creating
+ * a new user.
+ */
+ if (Dflg) {
+ if (gflg || bflg || fflg || eflg || sflg) {
+ exit ((set_defaults () != 0) ? 1 : 0);
+ }
+
+ show_defaults ();
+ exit (E_SUCCESS);
+ }
+
+ /*
+ * Start with a quick check to see if the user exists.
+ */
+ if (prefix_getpwnam (user_name) != NULL) { /* local, no need for xgetpwnam */
+ fprintf (stderr, _("%s: user '%s' already exists\n"), Prog, user_name);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_NAME_IN_USE);
+ }
+
+ /*
+ * Don't blindly overwrite a group when a user is added...
+ * If you already have a group username, and want to add the user
+ * to that group, use useradd -g username username.
+ * --bero
+ */
+ if (Uflg) {
+ /* local, no need for xgetgrnam */
+ if (prefix_getgrnam (user_name) != NULL) {
+ fprintf (stderr,
+ _("%s: group %s exists - if you want to add this user to that group, use -g.\n"),
+ Prog, user_name);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding group",
+ user_name, AUDIT_NO_ID,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_NAME_IN_USE);
+ }
+ }
+
+ /*
+ * Do the hard stuff:
+ * - open the files,
+ * - create the user entries,
+ * - create the home directory,
+ * - create user mail spool,
+ * - flush nscd caches for passwd and group services,
+ * - then close and update the files.
+ */
+ open_files ();
+
+ if (!oflg) {
+ /* first, seek for a valid uid to use for this user.
+ * We do this because later we can use the uid we found as
+ * gid too ... --gafton */
+ if (!uflg) {
+ if (find_new_uid (rflg, &user_id, NULL) < 0) {
+ fprintf (stderr, _("%s: can't create user\n"), Prog);
+ fail_exit (E_UID_IN_USE);
+ }
+ } else {
+ if (prefix_getpwuid (user_id) != NULL) {
+ fprintf (stderr,
+ _("%s: UID %lu is not unique\n"),
+ Prog, (unsigned long) user_id);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding user",
+ user_name, (unsigned int) user_id,
+ SHADOW_AUDIT_FAILURE);
+#endif
+ fail_exit (E_UID_IN_USE);
+ }
+ }
+ }
+
+ if (uflg)
+ check_uid_range(rflg,user_id);
+#ifdef WITH_TCB
+ if (getdef_bool ("USE_TCB")) {
+ if (shadowtcb_create (user_name, user_id) == SHADOWTCB_FAILURE) {
+ fprintf (stderr,
+ _("%s: Failed to create tcb directory for %s\n"),
+ Prog, user_name);
+ fail_exit (E_UID_IN_USE);
+ }
+ }
+#endif
+ open_shadow ();
+
+ /* do we have to add a group for that user? This is why we need to
+ * open the group files in the open_files() function --gafton */
+ if (Uflg) {
+ if (find_new_gid (rflg, &user_gid, &user_id) < 0) {
+ fprintf (stderr,
+ _("%s: can't create group\n"),
+ Prog);
+ fail_exit (4);
+ }
+ grp_add ();
+ }
+
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid && subuid_count != 0) {
+ if (find_new_sub_uids(&sub_uid_start, &subuid_count) < 0) {
+ fprintf (stderr,
+ _("%s: can't create subordinate user IDs\n"),
+ Prog);
+ fail_exit(E_SUB_UID_UPDATE);
+ }
+ }
+ if (is_sub_gid && subgid_count != 0) {
+ if (find_new_sub_gids(&sub_gid_start, &subgid_count) < 0) {
+ fprintf (stderr,
+ _("%s: can't create subordinate group IDs\n"),
+ Prog);
+ fail_exit(E_SUB_GID_UPDATE);
+ }
+ }
+#endif /* ENABLE_SUBIDS */
+
+ usr_update (subuid_count, subgid_count);
+
+ close_files ();
+
+ nscd_flush_cache ("passwd");
+ nscd_flush_cache ("group");
+ sssd_flush_cache (SSSD_DB_PASSWD | SSSD_DB_GROUP);
+
+ /*
+ * tallylog_reset needs to be able to lookup
+ * a valid existing user name,
+ * so we cannot call it before close_files()
+ */
+ if (!lflg && getpwuid (user_id) != NULL) {
+ tallylog_reset (user_name);
+ }
+
+#ifdef WITH_SELINUX
+ if (Zflg) {
+ if (set_seuser (user_name, user_selinux) != 0) {
+ fprintf (stderr,
+ _("%s: warning: the user name %s to %s SELinux user mapping failed.\n"),
+ Prog, user_name, user_selinux);
+#ifdef WITH_AUDIT
+ audit_logger (AUDIT_ADD_USER, Prog,
+ "adding SELinux user mapping",
+ user_name, (unsigned int) user_id, 0);
+#endif /* WITH_AUDIT */
+ fail_exit (E_SE_UPDATE);
+ }
+ }
+#endif /* WITH_SELINUX */
+
+ if (mflg) {
+ create_home ();
+ if (home_added) {
+ copy_tree (def_template, prefix_user_home, false, true,
+ (uid_t)-1, user_id, (gid_t)-1, user_gid);
+ } else {
+ fprintf (stderr,
+ _("%s: warning: the home directory %s already exists.\n"
+ "%s: Not copying any file from skel directory into it.\n"),
+ Prog, user_home, Prog);
+ }
+
+ }
+
+ /* Do not create mail directory for system accounts */
+ if (!rflg) {
+ create_mail ();
+ }
+
+ if (run_parts ("/etc/shadow-maint/useradd-post.d", user_name,
+ "useradd")) {
+ exit(1);
+ }
+
+ return E_SUCCESS;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-03 10:54:35 +0000