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usermod.c

/*
 * Copyright 1991 - 1994, Julianne Frances Haugh
 * 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. Neither the name of Julianne F. Haugh nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH 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 JULIE HAUGH 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>

#undef USE_PAM

#include "rcsid.h"
RCSID (PKG_VER "$Id: usermod.c 6 2005-03-20 15:34:28Z bubulle $")
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <fcntl.h>
#include <time.h>
#ifdef USE_PAM
#include <security/pam_appl.h>
#include <security/pam_misc.h>
#include <pwd.h>
#endif                        /* USE_PAM */
#include "prototypes.h"
#include "defines.h"
#include "chkname.h"
#include "faillog.h"
#if HAVE_LASTLOG_H
#include <lastlog.h>
#else
#include "lastlog_.h"
#endif
#include "pwauth.h"
#include "getdef.h"
/*
 * exit status values
 * for E_GRP_UPDATE and E_NOSPACE (not used yet), other update requests
 * will be implemented (as documented in the Solaris 2.x man page).
 */
#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_BAD_PWFILE 5 *//* passwd file contains errors */
#define E_NOTFOUND      6     /* specified user/group doesn't exist */
#define E_USER_BUSY     8     /* user to modify is logged in */
#define E_NAME_IN_USE   9     /* username already in use */
#define E_GRP_UPDATE    10    /* can't update group file */
/* #define E_NOSPACE    11 *//* insufficient space to move home dir */
#define E_HOMEDIR 12    /* unable to complete home dir move */
#define     VALID(s)    (strcspn (s, ":\n") == strlen (s))
static char *user_name;
static char *user_newname;
static char *user_pass;
static uid_t user_id;
static uid_t user_newid;
static gid_t user_gid;
static gid_t user_newgid;
static char *user_comment;
static char *user_home;
static char *user_newhome;
static char *user_shell;

#ifdef      SHADOWPWD
static long user_expire;
static long user_inactive;
#endif
static long sys_ngroups;
static char **user_groups;    /* NULL-terminated list */

static char *Prog;

#ifdef AUTH_METHODS
static char *auth_arg;
static char user_auth[BUFSIZ];
static int Aflg = 0;          /* specify user defined authentication method */
#else
#define Aflg 0
#endif

static int
 uflg = 0,              /* specify new user ID */
 oflg = 0,              /* permit non-unique user ID to be specified with -u */
 gflg = 0,              /* new primary group ID */
 Gflg = 0,              /* new secondary group set */
 dflg = 0,              /* new home directory */
 sflg = 0,              /* new shell program */
 cflg = 0,              /* new comment (GECOS) field */
 mflg = 0,              /* create user's home directory if it doesn't exist */
#ifdef SHADOWPWD
 fflg = 0,              /* days until account with expired password is locked */
 eflg = 0,              /* days since 1970-01-01 when account becomes expired */
#endif
 Lflg = 0,              /* lock the password */
 Uflg = 0,              /* unlock the password */
 pflg = 0,              /* new encrypted password */
 lflg = 0;              /* new user name */

#ifdef      NDBM
extern int pw_dbm_mode;

#ifdef      SHADOWPWD
extern int sp_dbm_mode;
#endif
extern int gr_dbm_mode;

#ifdef      SHADOWGRP
extern int sg_dbm_mode;
#endif
#endif

#ifdef SHADOWPWD
static int is_shadow_pwd;
#endif
#ifdef SHADOWGRP
static int is_shadow_grp;
#endif

#include "groupio.h"

#ifdef      SHADOWGRP
#include "sgroupio.h"
#endif

#include "pwio.h"

#ifdef      SHADOWPWD
#include "shadowio.h"
#endif

/* local function prototypes */
static int get_groups (char *);
static void usage (void);
static void new_pwent (struct passwd *);

#ifdef SHADOWPWD
static void new_spent (struct spwd *);
#endif
static void fail_exit (int);
static int update_group (void);

#ifdef SHADOWGRP
static int update_gshadow (void);
#endif
static int grp_update (void);

#ifdef AUTH_METHODS
static char *get_password (const char *);
static void split_auths (char *, char **);
static void update_auths (const char *, const char *, char *);
static void add_auths (const char *, const char *, char *);
static void delete_auths (const char *, const char *, char *);
static void convert_auth (char *, const char *, const char *);
static int valid_auth (const char *);
#endif
static long get_number (const char *);
static uid_t get_id (const char *);
static void process_flags (int, char **);
static void close_files (void);
static void open_files (void);
static void usr_update (void);
static void move_home (void);
static void update_files (void);

#ifndef NO_MOVE_MAILBOX
static void move_mailbox (void);
#endif

/*
 * Had to move this over from useradd.c since we have groups named
 * "56k-family"... ergh.
 * --Pac.
 */
static struct group *getgr_nam_gid (const char *name)
{
      gid_t gid;
      char *ep;

      gid = strtoul (name, &ep, 10);
      if (*name != '\0' && *ep == '\0')   /* valid numeric gid */
            return getgrgid (gid);

      return getgrnam (name);
}


/*
 * 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;

      /*
       * Initialize the list to be empty
       */

      user_groups[0] = (char *) 0;

      if (!*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
             */
            if ((cp = strchr (list, ',')))
                  *cp++ = '\0';

            /*
             * Names starting with digits are treated as numerical GID
             * values, otherwise the string is looked up as is.
             */
            grp = getgr_nam_gid (list);

            /*
             * There must be a match, either by GID value or by
             * string name.
             */
            if (!grp) {
                  fprintf (stderr, _("%s: unknown group %s\n"),
                         Prog, list);
                  errors++;
            }
            list = cp;

            /*
             * If the group doesn't exist, don't dump core. Instead,
             * try the next one.  --marekm
             */
            if (!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 (list);

      user_groups[ngroups] = (char *) 0;

      /*
       * Any errors in finding group names are fatal
       */

      if (errors)
            return -1;

      return 0;
}

/*
 * usage - display usage message and exit
 */

static void usage (void)
{
      fprintf (stderr,
             _
             ("usage: %s\t[-u uid [-o]] [-g group] [-G group,...] \n"),
             Prog);
      fprintf (stderr,
             _
             ("\t\t[-d home [-m]] [-s shell] [-c comment] [-l new_name]\n"));
      fprintf (stderr, "\t\t");
#ifdef SHADOWPWD
      fprintf (stderr, _("[-f inactive] [-e expire ] "));
#endif
#ifdef AUTH_METHODS
      fprintf (stderr, _("[-A {DEFAULT|program},... ] "));
#endif
      fprintf (stderr, _("[-p passwd] [-L|-U] name\n"));
      exit (E_USAGE);
}

/*
 * update encrypted password string (for both shadow and non-shadow
 * passwords)
 */

static char *new_pw_passwd (char *pw_pass, const char *pw_name)
{
      if (Lflg && pw_pass[0] != '!') {
            char *buf = xmalloc (strlen (pw_pass) + 2);

            SYSLOG ((LOG_INFO, "lock user `%s' password", pw_name));
            strcpy (buf, "!");
            strcat (buf, pw_pass);
            pw_pass = buf;
      } else if (Uflg && pw_pass[0] == '!') {
            char *s;

            SYSLOG ((LOG_INFO, "unlock user `%s' password", pw_name));
            s = pw_pass;
            while (*s) {
                  *s = *(s + 1);
                  s++;
            }
      } else if (pflg) {
            SYSLOG ((LOG_INFO, "change user `%s' password", pw_name));
            pw_pass = xstrdup (user_pass);
      }
      return pw_pass;
}

/*
 * 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)
{
      if (lflg) {
            SYSLOG ((LOG_INFO, "change user name `%s' to `%s'",
                   pwent->pw_name, user_newname));
            pwent->pw_name = xstrdup (user_newname);
      }
#ifdef SHADOWPWD
      if (!is_shadow_pwd)
#endif
            pwent->pw_passwd =
                new_pw_passwd (pwent->pw_passwd, pwent->pw_name);

      if (uflg) {
            SYSLOG ((LOG_INFO,
                   "change user `%s' UID from `%d' to `%d'",
                   pwent->pw_name, pwent->pw_uid, user_newid));
            pwent->pw_uid = user_newid;
      }
      if (gflg) {
            SYSLOG ((LOG_INFO,
                   "change user `%s' GID from `%d' to `%d'",
                   pwent->pw_name, pwent->pw_gid, user_newgid));
            pwent->pw_gid = user_newgid;
      }
      if (cflg)
            pwent->pw_gecos = user_comment;

      if (dflg) {
            SYSLOG ((LOG_INFO,
                   "change user `%s' home from `%s' to `%s'",
                   pwent->pw_name, pwent->pw_dir, user_newhome));
            pwent->pw_dir = user_newhome;
      }
      if (sflg) {
            SYSLOG ((LOG_INFO,
                   "change user `%s' shell from `%s' to `%s'",
                   pwent->pw_name, pwent->pw_shell, user_shell));
            pwent->pw_shell = user_shell;
      }
}

#ifdef      SHADOWPWD
/*
 * 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)
{
      if (lflg)
            spent->sp_namp = xstrdup (user_newname);

      if (fflg) {
            SYSLOG ((LOG_INFO,
                   "change user `%s' inactive from `%ld' to `%ld'",
                   spent->sp_namp, spent->sp_inact, user_inactive));
            spent->sp_inact = user_inactive;
      }
      if (eflg) {
            /* XXX - dates might be better than numbers of days.  --marekm */
            SYSLOG ((LOG_INFO,
                   "change user `%s' expiration from `%ld' to `%ld'",
                   spent->sp_namp, spent->sp_expire, user_expire));
            spent->sp_expire = user_expire;
      }
      spent->sp_pwdp = new_pw_passwd (spent->sp_pwdp, spent->sp_namp);
}
#endif                        /* SHADOWPWD */

/*
 * fail_exit - exit with an error code after unlocking files
 */

static void fail_exit (int code)
{
      (void) gr_unlock ();
#ifdef      SHADOWGRP
      if (is_shadow_grp)
            sgr_unlock ();
#endif
#ifdef      SHADOWPWD
      if (is_shadow_pwd)
            spw_unlock ();
#endif
      (void) pw_unlock ();
      exit (code);
}


static int update_group (void)
{
      int is_member;
      int was_member;
      int changed;
      const struct group *grp;
      struct group *ngrp;

      /*
       * Lock and open the group file. This will load all of the group
       * entries.
       */
      if (!gr_lock ()) {
            fprintf (stderr, _("%s: error locking group file\n"),
                   Prog);
            SYSLOG ((LOG_ERR, "error locking group file"));
            return -1;
      }
      if (!gr_open (O_RDWR)) {
            fprintf (stderr, _("%s: error opening group file\n"),
                   Prog);
            SYSLOG ((LOG_ERR, "error opening group file"));
            gr_unlock ();
            return -1;
      }

      changed = 0;

      /*
       * Scan through the entire group file looking for the groups that
       * the user is a member of.
       */
      while ((grp = gr_next ())) {

            /*
             * See if the user specified this group as one of their
             * concurrent groups.
             */
            was_member = is_on_list (grp->gr_mem, user_name);
            is_member = Gflg && is_on_list (user_groups, grp->gr_name);

            if (!was_member && !is_member)
                  continue;

            ngrp = __gr_dup (grp);
            if (!ngrp) {
                  fprintf (stderr,
                         _("%s: out of memory in update_group\n"),
                         Prog);
                  gr_unlock ();
                  return -1;
            }

            if (was_member && (!Gflg || is_member)) {
                  if (lflg) {
                        ngrp->gr_mem = del_list (ngrp->gr_mem,
                                           user_name);
                        ngrp->gr_mem = add_list (ngrp->gr_mem,
                                           user_newname);
                        changed = 1;
                        SYSLOG ((LOG_INFO,
                               "change `%s' to `%s' in group `%s'",
                               user_name, user_newname,
                               ngrp->gr_name));
                  }
            } else if (was_member && Gflg && !is_member) {
                  ngrp->gr_mem = del_list (ngrp->gr_mem, user_name);
                  changed = 1;
                  SYSLOG ((LOG_INFO, "delete `%s' from group `%s'",
                         user_name, ngrp->gr_name));
            } else if (!was_member && Gflg && is_member) {
                  ngrp->gr_mem = add_list (ngrp->gr_mem,
                                     lflg ? user_newname :
                                     user_name);
                  changed = 1;
                  SYSLOG ((LOG_INFO, "add `%s' to group `%s'",
                         lflg ? user_newname : user_name,
                         ngrp->gr_name));
            }
            if (!changed)
                  continue;

            changed = 0;
            if (!gr_update (ngrp)) {
                  fprintf (stderr,
                         _("%s: error adding new group entry\n"),
                         Prog);
                  SYSLOG ((LOG_ERR, "error adding group entry"));
                  gr_unlock ();
                  return -1;
            }
#ifdef      NDBM
            /*
             * Update the DBM group file with the new entry as well.
             */
            if (!gr_dbm_update (ngrp)) {
                  fprintf (stderr,
                         _("%s: cannot add new dbm group entry\n"),
                         Prog);
                  SYSLOG ((LOG_ERR, "error adding dbm group entry"));
                  gr_unlock ();
                  return -1;
            }
#endif                        /* NDBM */
      }
#ifdef NDBM
      endgrent ();
#endif                        /* NDBM */
      if (!gr_close ()) {
            fprintf (stderr, _("%s: cannot rewrite group file\n"),
                   Prog);
            gr_unlock ();
            return -1;
      }
      gr_unlock ();
      return 0;
}

#ifdef SHADOWGRP
static int update_gshadow (void)
{
      int is_member;
      int was_member;
      int was_admin;
      int changed;
      const struct sgrp *sgrp;
      struct sgrp *nsgrp;

      if (!sgr_lock ()) {
            fprintf (stderr,
                   _("%s: error locking shadow group file\n"), Prog);
            SYSLOG ((LOG_ERR, "error locking shadow group file"));
            return -1;
      }
      if (!sgr_open (O_RDWR)) {
            fprintf (stderr,
                   _("%s: error opening shadow group file\n"), Prog);
            SYSLOG ((LOG_ERR, "error opening shadow group file"));
            sgr_unlock ();
            return -1;
      }

      changed = 0;

      /*
       * Scan through the entire shadow group file looking for the groups
       * that the user is a member of.
       */
      while ((sgrp = sgr_next ())) {

            /*
             * See if the user was a member of this group
             */
            was_member = is_on_list (sgrp->sg_mem, user_name);

            /*
             * See if the user was an administrator of this group
             */
            was_admin = is_on_list (sgrp->sg_adm, user_name);

            /*
             * See if the user specified this group as one of their
             * concurrent groups.
             */
            is_member = Gflg
                && is_on_list (user_groups, sgrp->sg_name);

            if (!was_member && !was_admin && !is_member)
                  continue;

            nsgrp = __sgr_dup (sgrp);
            if (!nsgrp) {
                  fprintf (stderr,
                         _
                         ("%s: out of memory in update_gshadow\n"),
                         Prog);
                  sgr_unlock ();
                  return -1;
            }

            if (was_admin && lflg) {
                  nsgrp->sg_adm =
                      del_list (nsgrp->sg_adm, user_name);
                  nsgrp->sg_adm =
                      add_list (nsgrp->sg_adm, user_newname);
                  changed = 1;
                  SYSLOG ((LOG_INFO,
                         "change admin `%s' to `%s' in shadow group `%s'",
                         user_name, user_newname, nsgrp->sg_name));
            }
            if (was_member && (!Gflg || is_member)) {
                  if (lflg) {
                        nsgrp->sg_mem = del_list (nsgrp->sg_mem,
                                            user_name);
                        nsgrp->sg_mem = add_list (nsgrp->sg_mem,
                                            user_newname);
                        changed = 1;
                        SYSLOG ((LOG_INFO,
                               "change `%s' to `%s' in shadow group `%s'",
                               user_name, user_newname,
                               nsgrp->sg_name));
                  }
            } else if (was_member && Gflg && !is_member) {
                  nsgrp->sg_mem =
                      del_list (nsgrp->sg_mem, user_name);
                  changed = 1;
                  SYSLOG ((LOG_INFO,
                         "delete `%s' from shadow group `%s'",
                         user_name, nsgrp->sg_name));
            } else if (!was_member && Gflg && is_member) {
                  nsgrp->sg_mem = add_list (nsgrp->sg_mem,
                                      lflg ? user_newname :
                                      user_name);
                  changed = 1;
                  SYSLOG ((LOG_INFO, "add `%s' to shadow group `%s'",
                         lflg ? user_newname : user_name,
                         nsgrp->sg_name));
            }
            if (!changed)
                  continue;

            changed = 0;

            /* 
             * Update the group entry to reflect the changes.
             */
            if (!sgr_update (nsgrp)) {
                  fprintf (stderr,
                         _("%s: error adding new group entry\n"),
                         Prog);
                  SYSLOG ((LOG_ERR,
                         "error adding shadow group entry"));
                  sgr_unlock ();
                  return -1;
            }
#ifdef      NDBM
            /*
             * Update the DBM group file with the new entry as well.
             */
            if (!sg_dbm_update (nsgrp)) {
                  fprintf (stderr,
                         _("%s: cannot add new dbm group entry\n"),
                         Prog);
                  SYSLOG ((LOG_ERR,
                         "error adding dbm shadow group entry"));
                  sgr_unlock ();
                  return -1;
            }
#endif                        /* NDBM */
      }
#ifdef NDBM
      endsgent ();
#endif                        /* NDBM */
      if (!sgr_close ()) {
            fprintf (stderr,
                   _("%s: cannot rewrite shadow group file\n"),
                   Prog);
            sgr_unlock ();
            return -1;
      }
      sgr_unlock ();
      return 0;
}
#endif                        /* SHADOWGRP */

/*
 * 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.
 */

static int grp_update (void)
{
      int ret;

      ret = update_group ();
#ifdef SHADOWGRP
      if (!ret && is_shadow_grp)
            ret = update_gshadow ();
#endif
      return ret;
}

#ifdef AUTH_METHODS
/*
 * get_password - locate encrypted password in authentication list
 */

static char *get_password (const char *list)
{
      char *cp, *end;
      static char buf[257];

      strcpy (buf, list);
      for (cp = buf; cp; cp = end) {
            if ((end = strchr (cp, ';')))
                  *end++ = 0;

            if (cp[0] == '@')
                  continue;

            return cp;
      }
      return (char *) 0;
}

/*
 * split_auths - break up comma list into (char *) array
 */

static void split_auths (char *list, char **array)
{
      char *cp, *end;
      int i = 0;

      for (cp = list; cp; cp = end) {
            if ((end = strchr (cp, ';')))
                  *end++ = '\0';

            array[i++] = cp;
      }
      array[i] = 0;
}

/*
 * update_auths - find list of methods to update
 */

static void update_auths (const char *old, const char *new, char *update)
{
      char oldbuf[257], newbuf[257];
      char *oldv[32], *newv[32], *updatev[32];
      int i, j, k;

      strcpy (oldbuf, old);
      split_auths (oldbuf, oldv);

      strcpy (newbuf, new);
      split_auths (newbuf, newv);

      for (i = j = k = 0; oldv[i]; i++) {
            for (j = 0; newv[j]; j++)
                  if (strcmp (oldv[i], newv[j]) != 0)
                        break;

            if (newv[j] != (char *) 0)
                  updatev[k++] = oldv[i];
      }
      updatev[k] = 0;

      update[0] = '\0';
      for (i = 0; updatev[i]; i++) {
            if (i)
                  strcat (update, ";");

            strcat (update, updatev[i]);
      }
}

/*
 * add_auths - find list of methods to add
 */

static void add_auths (const char *old, const char *new, char *add)
{
      char oldbuf[257], newbuf[257];
      char *oldv[32], *newv[32], *addv[32];
      int i, j, k;

      strcpy (oldbuf, old);
      split_auths (oldbuf, oldv);

      strcpy (newbuf, new);
      split_auths (newbuf, newv);

      for (i = j = k = 0; newv[i]; i++) {
            for (j = 0; oldv[j]; j++)
                  if (strcmp (oldv[i], newv[j]) == 0)
                        break;

            if (oldv[j] == (char *) 0)
                  addv[k++] = newv[i];
      }
      addv[k] = 0;

      add[0] = '\0';
      for (i = 0; addv[i]; i++) {
            if (i)
                  strcat (add, ";");

            strcat (add, addv[i]);
      }
}

/*
 * delete_auths - find list of methods to delete
 */

static void delete_auths (const char *old, const char *new, char *remove)
{
      char oldbuf[257], newbuf[257];
      char *oldv[32], *newv[32], *removev[32];
      int i, j, k;

      strcpy (oldbuf, old);
      split_auths (oldbuf, oldv);

      strcpy (newbuf, new);
      split_auths (newbuf, newv);

      for (i = j = k = 0; oldv[i]; i++) {
            for (j = 0; newv[j]; j++)
                  if (strcmp (oldv[i], newv[j]) == 0)
                        break;

            if (newv[j] == (char *) 0)
                  removev[k++] = oldv[i];
      }
      removev[k] = 0;

      remove[0] = '\0';
      for (i = 0; removev[i]; i++) {
            if (i)
                  strcat (remove, ";");

            strcat (remove, removev[i]);
      }
}

/*
 * convert_auth - convert the argument list to a authentication list
 */

static void
convert_auth (char *auths, const char *oldauths, const char *list)
{
      char *cp, *end;
      char *old;
      char buf[257];

      /*
       * Copy each method. DEFAULT is replaced by an encrypted string if
       * one can be found in the current authentication list.
       */

      strcpy (buf, list);
      auths[0] = '\0';
      for (cp = buf; cp; cp = end) {
            if (auths[0])
                  strcat (auths, ";");

            if ((end = strchr (cp, ',')))
                  *end++ = '\0';

            if (strcmp (cp, "DEFAULT") == 0) {
                  if ((old = get_password (oldauths)))
                        strcat (auths, old);
                  else
                        strcat (auths, "!");
            } else {
                  strcat (auths, "@");
                  strcat (auths, cp);
            }
      }
}

/*
 * valid_auth - check authentication list for validity
 */

static int valid_auth (const char *methods)
{
      char *cp, *end;
      char buf[257];
      int default_cnt = 0;

      /*
       * Cursory checks, length and illegal characters
       */

      if ((int) strlen (methods) > 256)
            return 0;

      if (!VALID (methods))
            return 0;

      /*
       * Pick each method apart and check it.
       */

      strcpy (buf, methods);
      for (cp = buf; cp; cp = end) {
            if ((end = strchr (cp, ',')))
                  *end++ = '\0';

            if (strcmp (cp, "DEFAULT") == 0) {
                  if (default_cnt++ > 0)
                        return 0;
            }
      }
      return 1;
}
#endif

static long get_number (const char *cp)
{
      long val;
      char *ep;

      val = strtol (cp, &ep, 10);
      if (*cp != '\0' && *ep == '\0')     /* valid number */
            return val;

      fprintf (stderr, _("%s: invalid numeric argument `%s'\n"), Prog,
             cp);
      exit (E_BAD_ARG);
}

static uid_t get_id (const char *cp)
{
      uid_t val;
      char *ep;

      val = strtoul (cp, &ep, 10);
      if (*cp != '\0' && *ep == '\0')     /* valid number */
            return val;

      fprintf (stderr, _("%s: invalid numeric argument `%s'\n"), Prog,
             cp);
      exit (E_BAD_ARG);
}

/*
 * 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;
      const struct passwd *pwd;

#ifdef SHADOWPWD
      const struct spwd *spwd = NULL;
#endif
      int anyflag = 0;
      int arg;

      if (argc == 1 || argv[argc - 1][0] == '-')
            usage ();

      if (!(pwd = getpwnam (argv[argc - 1]))) {
            fprintf (stderr, _("%s: user %s does not exist\n"),
                   Prog, argv[argc - 1]);
            exit (E_NOTFOUND);
      }
      user_name = argv[argc - 1];

#ifdef      USE_NIS

      /*
       * Now make sure it isn't an NIS user.
       */

      if (__ispwNIS ()) {
            char *nis_domain;
            char *nis_master;

            fprintf (stderr, _("%s: user %s is a NIS user\n"),
                   Prog, user_name);

            if (!yp_get_default_domain (&nis_domain) &&
                !yp_master (nis_domain, "passwd.byname",
                        &nis_master)) {
                  fprintf (stderr, _("%s: %s is the NIS master\n"),
                         Prog, nis_master);
            }
            exit (E_NOTFOUND);
      }
#endif
      user_id = pwd->pw_uid;
      user_gid = pwd->pw_gid;
      user_comment = xstrdup (pwd->pw_gecos);
      user_home = xstrdup (pwd->pw_dir);
      user_shell = xstrdup (pwd->pw_shell);

#ifdef      SHADOWPWD
      if (is_shadow_pwd && (spwd = getspnam (user_name))) {
            user_expire = spwd->sp_expire;
            user_inactive = spwd->sp_inact;
      }
#endif
#ifdef      SHADOWPWD
#define FLAGS "A:u:og:G:d:s:c:mf:e:l:p:LU"
#else
#define FLAGS "A:u:og:G:d:s:c:ml:p:LU"
#endif
      while ((arg = getopt (argc, argv, FLAGS)) != EOF) {
#undef FLAGS
            switch (arg) {
#ifdef AUTH_METHODS
            case 'A':
                  if (!valid_auth (optarg)) {
                        fprintf (stderr,
                               _("%s: invalid field `%s'\n"),
                               Prog, optarg);
                        exit (E_BAD_ARG);
                  }
                  auth_arg = optarg;
                  Aflg++;
                  break;
#endif
            case 'c':
                  if (!VALID (optarg)) {
                        fprintf (stderr,
                               _("%s: invalid field `%s'\n"),
                               Prog, optarg);
                        exit (E_BAD_ARG);
                  }
                  user_comment = optarg;
                  cflg++;
                  break;
            case 'd':
                  if (!VALID (optarg)) {
                        fprintf (stderr,
                               _("%s: invalid field `%s'\n"),
                               Prog, optarg);
                        exit (E_BAD_ARG);
                  }
                  dflg++;
                  user_newhome = optarg;
                  break;
#ifdef SHADOWPWD
            case 'e':
                  if (*optarg) {
                        user_expire = strtoday (optarg);
                        if (user_expire == -1) {
                              fprintf (stderr,
                                     _
                                     ("%s: invalid date `%s'\n"),
                                     Prog, optarg);
                              exit (E_BAD_ARG);
                        }
                        user_expire *= DAY / SCALE;
                  } else
                        user_expire = -1;
                  eflg++;
                  break;
            case 'f':
                  user_inactive = get_number (optarg);
                  fflg++;
                  break;
#endif
            case 'g':
                  grp = getgr_nam_gid (optarg);
                  if (!grp) {
                        fprintf (stderr,
                               _("%s: unknown group %s\n"),
                               Prog, optarg);
                        exit (E_NOTFOUND);
                  }
                  user_newgid = grp->gr_gid;
                  gflg++;
                  break;
            case 'G':
                  if (get_groups (optarg))
                        exit (E_NOTFOUND);
                  Gflg++;
                  break;
            case 'l':
                  if (!check_user_name (optarg)) {
                        fprintf (stderr,
                               _("%s: invalid field `%s'\n"),
                               Prog, optarg);
                        exit (E_BAD_ARG);
                  }

                  /*
                   * If the name does not really change, we mustn't
                   * set the flag as this will cause rather serious
                   * problems later!
                   */

                  if (strcmp (user_name, optarg))
                        lflg++;

                  user_newname = optarg;
                  break;
            case 'L':
                  if (Uflg || pflg)
                        usage ();

                  Lflg++;
                  break;
            case 'm':
                  if (!dflg)
                        usage ();

                  mflg++;
                  break;
            case 'o':
                  if (!uflg)
                        usage ();

                  oflg++;
                  break;
            case 'p':
                  if (Lflg || Uflg)
                        usage ();

                  user_pass = optarg;
                  pflg++;
                  break;
            case 's':
                  if (!VALID (optarg)) {
                        fprintf (stderr,
                               _("%s: invalid field `%s'\n"),
                               Prog, optarg);
                        exit (E_BAD_ARG);
                  }
                  user_shell = optarg;
                  sflg++;
                  break;
            case 'u':
                  user_newid = get_id (optarg);
                  uflg++;
                  break;
            case 'U':
                  if (Lflg && pflg)
                        usage ();

                  Uflg++;
                  break;
            default:
                  usage ();
            }
            anyflag++;
      }
      if (anyflag == 0) {
            fprintf (stderr, _("%s: no flags given\n"), Prog);
            exit (E_USAGE);
      }
#ifdef SHADOWPWD
      if (!is_shadow_pwd && (eflg || fflg)) {
            fprintf (stderr,
                   _
                   ("%s: shadow passwords required for -e and -f\n"),
                   Prog);
            exit (E_USAGE);
      }
#endif

      if (optind != argc - 1)
            usage ();

      if (dflg && strcmp (user_home, user_newhome) == 0)
            dflg = mflg = 0;

      if (uflg && user_id == user_newid)
            uflg = oflg = 0;

      if (lflg && getpwnam (user_newname)) {
            fprintf (stderr, _("%s: user %s exists\n"), Prog,
                   user_newname);
            exit (E_NAME_IN_USE);
      }

      if (uflg && !oflg && getpwuid (user_newid)) {
            fprintf (stderr, _("%s: uid %lu is not unique\n"),
                   Prog, (unsigned long) user_newid);
            exit (E_UID_IN_USE);
      }
}

/*
 * 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 ()) {
            fprintf (stderr, _("%s: cannot rewrite password file\n"),
                   Prog);
            fail_exit (E_PW_UPDATE);
      }
#ifdef      SHADOWPWD
      if (is_shadow_pwd && !spw_close ()) {
            fprintf (stderr,
                   _("%s: cannot rewrite shadow password file\n"),
                   Prog);
            fail_exit (E_PW_UPDATE);
      }
#endif
#ifdef      SHADOWPWD
      if (is_shadow_pwd)
            spw_unlock ();
#endif
      (void) pw_unlock ();

      /*
       * Close the DBM and/or flat files
       */

      endpwent ();
#ifdef      SHADOWPWD
      endspent ();
#endif
      endgrent ();
#ifdef      SHADOWGRP
      endsgent ();
#endif
}

/*
 * open_files - lock and open the password files
 *
 *    open_files() opens the two password files.
 */

static void open_files (void)
{
      if (!pw_lock ()) {
            fprintf (stderr, _("%s: unable to lock password file\n"),
                   Prog);
            exit (E_PW_UPDATE);
      }
      if (!pw_open (O_RDWR)) {
            fprintf (stderr, _("%s: unable to open password file\n"),
                   Prog);
            fail_exit (E_PW_UPDATE);
      }
#ifdef      SHADOWPWD
      if (is_shadow_pwd && !spw_lock ()) {
            fprintf (stderr,
                   _("%s: cannot lock shadow password file\n"),
                   Prog);
            fail_exit (E_PW_UPDATE);
      }
      if (is_shadow_pwd && !spw_open (O_RDWR)) {
            fprintf (stderr,
                   _("%s: cannot open shadow password file\n"),
                   Prog);
            fail_exit (E_PW_UPDATE);
      }
#endif
}

/*
 * 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 (void)
{
      struct passwd pwent;
      const struct passwd *pwd;

#ifdef      SHADOWPWD
      struct spwd spent;
      const struct spwd *spwd = NULL;
#endif
#ifdef AUTH_METHODS
      char old_auth[BUFSIZ];
      char auth_buf[BUFSIZ];
#endif

      /*
       * Locate the entry in /etc/passwd, which MUST exist.
       */

      pwd = pw_locate (user_name);
      if (!pwd) {
            fprintf (stderr, _("%s: %s not found in /etc/passwd\n"),
                   Prog, user_name);
            fail_exit (E_NOTFOUND);
      }
      pwent = *pwd;
      new_pwent (&pwent);

#ifdef      SHADOWPWD

      /* 
       * Locate the entry in /etc/shadow. It doesn't have to exist, and
       * won't be created if it doesn't.
       */

      if (is_shadow_pwd && (spwd = spw_locate (user_name))) {
            spent = *spwd;
            new_spent (&spent);
      }
#endif

#ifdef AUTH_METHODS

#ifdef      SHADOWPWD
      strcpy (old_auth, spwd ? spent.sp_pwdp : pwent.pw_passwd);
#else
      strcpy (old_auth, pwent.pw_passwd);
#endif

      if (Aflg)
            convert_auth (user_auth, old_auth, auth_arg);

      /*
       * XXX - this code needs some checking, changing the user name with
       * "usermod -l new old" clears the password for this user :-(. For
       * now, just don't define AUTH_METHODS and all will be well. Most
       * programs don't support "administrator defined authentication
       * methods" and PAM (when done) will be better anyway :-).  --marekm
       */
      if (lflg || (Aflg && strcmp (old_auth, user_auth) != 0)) {
            delete_auths (old_auth, user_auth, auth_buf);
            if (auth_buf[0] && pw_auth (auth_buf, user_name,
                                  PW_DELETE, (char *) 0)) {
                  fprintf (stderr,
                         _
                         ("%s: error deleting authentication method\n"),
                         Prog);
                  SYSLOG ((LOG_ERR, "error deleting auth for `%s'",
                         user_name));
                  fail_exit (E_PW_UPDATE);
            }
            add_auths (old_auth, user_auth, auth_buf);
            if (auth_buf[0] == '@' && pw_auth (auth_buf,
                                       lflg ? user_newname :
                                       user_name, PW_ADD,
                                       (char *) 0)) {
                  fprintf (stderr,
                         _
                         ("%s: error adding authentication method\n"),
                         Prog);
                  SYSLOG ((LOG_ERR, "error adding auth for `%s'",
                         lflg ? user_newname : user_name));
                  fail_exit (E_PW_UPDATE);
            }
            update_auths (old_auth, user_auth, auth_buf);
            if (lflg && auth_buf[0] == '@' && pw_auth (auth_buf,
                                             user_newname,
                                             PW_CHANGE,
                                             user_name)) {
                  fprintf (stderr,
                         _
                         ("%s: error changing authentication method\n"),
                         Prog);
                  SYSLOG ((LOG_ERR, "error changing auth for `%s'",
                         lflg ? user_newname : user_name));
                  fail_exit (E_PW_UPDATE);
            }
#ifdef      SHADOWPWD
            if (spwd)
                  spent.sp_pwdp = user_auth;
            else
#endif
                  pwent.pw_passwd = user_auth;
      }
#endif                        /* AUTH_METHODS */
      if (lflg || uflg || gflg || cflg || dflg || sflg || Aflg || pflg
          || Lflg || Uflg) {
            if (!pw_update (&pwent)) {
                  fprintf (stderr,
                         _("%s: error changing password entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
            if (lflg && !pw_remove (user_name)) {
                  fprintf (stderr,
                         _("%s: error removing password entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
#ifdef NDBM
            if (pw_dbm_present ()) {
                  if (!pw_dbm_update (&pwent)) {
                        fprintf (stderr,
                               _
                               ("%s: error adding password dbm entry\n"),
                               Prog);
                        fail_exit (E_PW_UPDATE);
                  }
                  if (lflg && (pwd = getpwnam (user_name)) &&
                      !pw_dbm_remove (pwd)) {
                        fprintf (stderr,
                               _
                               ("%s: error removing passwd dbm entry\n"),
                               Prog);
                        fail_exit (E_PW_UPDATE);
                  }
            }
#endif
      }
#ifdef      SHADOWPWD
      if (spwd && (lflg || eflg || fflg || Aflg || pflg || Lflg || Uflg)) {
            if (!spw_update (&spent)) {
                  fprintf (stderr,
                         _
                         ("%s: error adding new shadow password entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
            if (lflg && !spw_remove (user_name)) {
                  fprintf (stderr,
                         _
                         ("%s: error removing shadow password entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
      }
#ifdef      NDBM
      if (spwd && sp_dbm_present ()) {
            if (!sp_dbm_update (&spent)) {
                  fprintf (stderr,
                         _
                         ("%s: error updating shadow passwd dbm entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
            if (lflg && !sp_dbm_remove (user_name)) {
                  fprintf (stderr,
                         _
                         ("%s: error removing shadow passwd dbm entry\n"),
                         Prog);
                  fail_exit (E_PW_UPDATE);
            }
      }
#endif                        /* NDBM */
#endif                        /* SHADOWPWD */
}

/*
 * move_home - move the user's home directory
 *
 *    move_home() moves the user's home directory to a new location. The
 *    files will be copied if the directory cannot simply be renamed.
 */

static void move_home (void)
{
      struct stat sb;

      if (mflg && stat (user_home, &sb) == 0) {
            /*
             * Don't try to move it if it is not a directory
             * (but /dev/null for example).  --marekm
             */
            if (!S_ISDIR (sb.st_mode))
                  return;

            if (access (user_newhome, F_OK) == 0) {
                  fprintf (stderr, _("%s: directory %s exists\n"),
                         Prog, user_newhome);
                  fail_exit (E_HOMEDIR);
            } else if (rename (user_home, user_newhome)) {
                  if (errno == EXDEV) {
                        if (mkdir
                            (user_newhome, sb.st_mode & 0777)) {
                              fprintf (stderr,
                                     _
                                     ("%s: can't create %s\n"),
                                     Prog, user_newhome);
                        }
                        if (chown (user_newhome,
                                 sb.st_uid, sb.st_gid)) {
                              fprintf (stderr,
                                     _("%s: can't chown %s\n"),
                                     Prog, user_newhome);
                              rmdir (user_newhome);
                              fail_exit (E_HOMEDIR);
                        }
                        if (copy_tree (user_home, user_newhome,
                                     uflg ? user_newid : -1,
                                     gflg ? user_newgid : -1) ==
                            0) {
                          if (remove_tree (user_home) != 0 ||
                            rmdir (user_home) != 0)
                            fprintf (stderr,
                                   _("%s: warning: failed to completely remove old home directory %s"),
                                   Prog, user_home);
                          return;
                        }

                        (void) remove_tree (user_newhome);
                        (void) rmdir (user_newhome);
                  }
                  fprintf (stderr,
                         _
                         ("%s: cannot rename directory %s to %s\n"),
                         Prog, user_home, user_newhome);
                  fail_exit (E_HOMEDIR);
            }
      }
      if (uflg || gflg)
            chown (dflg ? user_newhome : user_home,
                   uflg ? user_newid : user_id,
                   gflg ? user_newgid : user_gid);
}

/*
 * update_files - update the lastlog and faillog files
 */

static void update_files (void)
{
      struct lastlog ll;
      struct faillog fl;
      int fd;

      /*
       * Relocate the "lastlog" entries for the user. The old entry is
       * left alone in case the UID was shared. It doesn't hurt anything
       * to just leave it be.
       */

      if ((fd = open (LASTLOG_FILE, O_RDWR)) != -1) {
            lseek (fd, (off_t) user_id * sizeof ll, SEEK_SET);
            if (read (fd, (char *) &ll, sizeof ll) == sizeof ll) {
                  lseek (fd, (off_t) user_newid * sizeof ll,
                         SEEK_SET);
                  write (fd, (char *) &ll, sizeof ll);
            }
            close (fd);
      }

      /*
       * Relocate the "faillog" entries in the same manner.
       */

      if ((fd = open (FAILLOG_FILE, O_RDWR)) != -1) {
            lseek (fd, (off_t) user_id * sizeof fl, SEEK_SET);
            if (read (fd, (char *) &fl, sizeof fl) == sizeof fl) {
                  lseek (fd, (off_t) user_newid * sizeof fl,
                         SEEK_SET);
                  write (fd, (char *) &fl, sizeof fl);
            }
            close (fd);
      }
}

#ifndef NO_MOVE_MAILBOX
/*
 * This is the new and improved code to carefully chown/rename the user's
 * mailbox. Maybe I am too paranoid but the mail spool dir sometimes
 * happens to be mode 1777 (this makes mail user agents work without
 * being setgid mail, but is NOT recommended; they all should be fixed
 * to use movemail).  --marekm
 */
static void move_mailbox (void)
{
      const char *maildir;
      char mailfile[1024], newmailfile[1024];
      int fd;
      struct stat st;

      maildir = getdef_str ("MAIL_DIR");
#ifdef MAIL_SPOOL_DIR
      if (!maildir && !getdef_str ("MAIL_FILE"))
            maildir = MAIL_SPOOL_DIR;
#endif
      if (!maildir)
            return;

      /*
       * O_NONBLOCK is to make sure open won't hang on mandatory locks.
       * We do fstat/fchown to make sure there are no races (someone
       * replacing /var/spool/mail/luser with a hard link to /etc/passwd
       * between stat and chown).  --marekm
       */

      snprintf (mailfile, sizeof mailfile, "%s/%s", maildir, user_name);
      fd = open (mailfile, O_RDONLY | O_NONBLOCK, 0);
      if (fd < 0) {
            /* no need for warnings if the mailbox doesn't exist */
            if (errno != ENOENT)
                  perror (mailfile);
            return;
      }
      if (fstat (fd, &st) < 0) {
            perror ("fstat");
            close (fd);
            return;
      }
      if (st.st_uid != user_id) {
            /* better leave it alone */
            fprintf (stderr, _("%s: warning: %s not owned by %s\n"),
                   Prog, mailfile, user_name);
            close (fd);
            return;
      }
      if (uflg && fchown (fd, user_newid, (gid_t) - 1) < 0)
            perror (_("failed to change mailbox owner"));

      close (fd);

      if (lflg) {
            snprintf (newmailfile, sizeof newmailfile, "%s/%s",
                    maildir, user_newname);
            if (link (mailfile, newmailfile) || unlink (mailfile))
                  perror (_("failed to rename mailbox"));
      }
}
#endif

#ifdef USE_PAM
static struct pam_conv conv = {
      misc_conv,
      NULL
};
#endif                        /* USE_PAM */

/*
 * main - usermod command
 */

int main (int argc, char **argv)
{
      int grp_err = 0;

#ifdef USE_PAM
      pam_handle_t *pamh = NULL;
      struct passwd *pampw;
      int retval;
#endif

      sys_ngroups = sysconf (_SC_NGROUPS_MAX);
      user_groups = malloc ((1 + sys_ngroups) * sizeof (char *));
      /*
       * Get my name so that I can use it to report errors.
       */
      Prog = Basename (argv[0]);

      setlocale (LC_ALL, "");
      bindtextdomain (PACKAGE, LOCALEDIR);
      textdomain (PACKAGE);

#ifdef USE_PAM
      retval = PAM_SUCCESS;

      pampw = getpwuid (getuid ());
      if (pampw == NULL) {
            retval = PAM_USER_UNKNOWN;
      }

      if (retval == PAM_SUCCESS) {
            retval =
                pam_start ("shadow", pampw->pw_name, &conv, &pamh);
      }

      if (retval == PAM_SUCCESS) {
            retval = pam_authenticate (pamh, 0);
            if (retval != PAM_SUCCESS) {
                  pam_end (pamh, retval);
            }
      }

      if (retval == PAM_SUCCESS) {
            retval = pam_acct_mgmt (pamh, 0);
            if (retval != PAM_SUCCESS) {
                  pam_end (pamh, retval);
            }
      }

      if (retval != PAM_SUCCESS) {
            fprintf (stderr, _("%s: PAM authentication failed\n"),
                   Prog);
            exit (1);
      }
#endif                        /* USE_PAM */

      OPENLOG (Prog);

#ifdef SHADOWPWD
      is_shadow_pwd = spw_file_present ();
#endif
#ifdef SHADOWGRP
      is_shadow_grp = sgr_file_present ();
#endif

      /*
       * The open routines for the NDBM files don't use read-write as the
       * mode, so we have to clue them in.
       */

#ifdef      NDBM
      pw_dbm_mode = O_RDWR;
#ifdef      SHADOWPWD
      sp_dbm_mode = O_RDWR;
#endif
      gr_dbm_mode = O_RDWR;
#ifdef      SHADOWGRP
      sg_dbm_mode = O_RDWR;
#endif
#endif                        /* NDBM */
      process_flags (argc, argv);

      /*
       * Do the hard stuff - open the files, change the user entries,
       * change the home directory, then close and update the files.
       */

      open_files ();

      usr_update ();

      close_files ();

      if (Gflg || lflg)
            grp_err = grp_update ();

      if (mflg)
            move_home ();

#ifndef NO_MOVE_MAILBOX
      if (lflg || uflg)
            move_mailbox ();
#endif

      if (uflg) {
            update_files ();

            /*
             * Change the UID on all of the files owned by `user_id' to
             * `user_newid' in the user's home directory.
             */

            chown_tree (dflg ? user_newhome : user_home,
                      user_id, user_newid,
                      user_gid, gflg ? user_newgid : user_gid);
      }

      if (grp_err)
            exit (E_GRP_UPDATE);

#ifdef USE_PAM
      if (retval == PAM_SUCCESS) {
            retval = pam_chauthtok (pamh, 0);
            if (retval != PAM_SUCCESS) {
                  pam_end (pamh, retval);
            }
      }

      if (retval != PAM_SUCCESS) {
            fprintf (stderr, _("%s: PAM chauthtok failed\n"), Prog);
            exit (1);
      }

      if (retval == PAM_SUCCESS)
            pam_end (pamh, PAM_SUCCESS);
#endif                        /* USE_PAM */

      exit (E_SUCCESS);
 /*NOTREACHED*/}

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