Adding upstream version 1:4.5.upstream/1%4.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1251 insertions, 0 deletions

diff --git a/src/newusers.c b/src/newusers.c
new file mode 100644
index 0000000..c38aec4
--- /dev/null
+++ b/src/newusers.c
@@ -0,0 +1,1251 @@
+/*
+ * Copyright (c) 1990 - 1993, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2000 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2011, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ *	newusers - create users from a batch file
+ *
+ *	newusers creates a collection of entries in /etc/passwd
+ *	and related files by reading a passwd-format file and
+ *	adding entries in the related directories.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <pwd.h>
+#include <grp.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+#include "pam_defs.h"
+#endif				/* USE_PAM */
+#endif				/* ACCT_TOOLS_SETUID */
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+#include "groupio.h"
+#include "nscd.h"
+#include "pwio.h"
+#include "sgroupio.h"
+#include "shadowio.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif				/* ENABLE_SUBIDS */
+#include "chkname.h"
+
+/*
+ * Global variables
+ */
+const char *Prog;
+
+static bool rflg = false;	/* create a system account */
+#ifndef USE_PAM
+static /*@null@*//*@observer@*/char *crypt_method = NULL;
+#define cflg (NULL != crypt_method)
+#ifdef USE_SHA_CRYPT
+static bool sflg = false;
+static long sha_rounds = 5000;
+#endif				/* USE_SHA_CRYPT */
+#endif				/* !USE_PAM */
+
+static bool is_shadow;
+#ifdef SHADOWGRP
+static bool is_shadow_grp;
+static bool sgr_locked = false;
+#endif
+static bool pw_locked = false;
+static bool gr_locked = false;
+static bool spw_locked = false;
+#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;
+#endif				/* ENABLE_SUBIDS */
+
+/* local function prototypes */
+static void usage (int status);
+static void fail_exit (int);
+static int add_group (const char *, const char *, gid_t *, gid_t);
+static int get_user_id (const char *, uid_t *);
+static int add_user (const char *, uid_t, gid_t);
+#ifndef USE_PAM
+static int update_passwd (struct passwd *, const char *);
+#endif				/* !USE_PAM */
+static int add_passwd (struct passwd *, const char *);
+static void process_flags (int argc, char **argv);
+static void check_flags (void);
+static void check_perms (void);
+static void open_files (void);
+static void close_files (void);
+
+/*
+ * usage - display usage message and exit
+ */
+static void usage (int status)
+{
+	FILE *usageout = (EXIT_SUCCESS != status) ? stderr : stdout;
+	(void) fprintf (usageout,
+	                _("Usage: %s [options]\n"
+	                  "\n"
+	                  "Options:\n"),
+	                Prog);
+#ifndef USE_PAM
+	(void) fprintf (usageout,
+	                _("  -c, --crypt-method METHOD     the crypt method (one of %s)\n"),
+#ifndef USE_SHA_CRYPT
+	                "NONE DES MD5"
+#else				/* USE_SHA_CRYPT */
+	                "NONE DES MD5 SHA256 SHA512"
+#endif				/* USE_SHA_CRYPT */
+	               );
+#endif				/* !USE_PAM */
+	(void) fputs (_("  -h, --help                    display this help message and exit\n"), usageout);
+	(void) fputs (_("  -r, --system                  create system accounts\n"), usageout);
+	(void) fputs (_("  -R, --root CHROOT_DIR         directory to chroot into\n"), usageout);
+#ifndef USE_PAM
+#ifdef USE_SHA_CRYPT
+	(void) fputs (_("  -s, --sha-rounds              number of SHA rounds for the SHA*\n"
+	                "                                crypt algorithms\n"),
+	              usageout);
+#endif				/* USE_SHA_CRYPT */
+#endif				/* !USE_PAM */
+	(void) fputs ("\n", usageout);
+
+	exit (status);
+}
+
+/*
+ * fail_exit - undo as much as possible
+ */
+static void fail_exit (int code)
+{
+	if (spw_locked) {
+		if (spw_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
+			/* continue */
+		}
+	}
+	if (pw_locked) {
+		if (pw_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
+			/* continue */
+		}
+	}
+	if (gr_locked) {
+		if (gr_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
+			/* continue */
+		}
+	}
+#ifdef	SHADOWGRP
+	if (sgr_locked) {
+		if (sgr_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
+			/* continue */
+		}
+	}
+#endif
+#ifdef 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 ()));
+			/* 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 ()));
+			/* continue */
+		}
+	}
+#endif				/* ENABLE_SUBIDS */
+
+	exit (code);
+}
+
+/*
+ * add_group - create a new group or add a user to an existing group
+ */
+static int add_group (const char *name, const char *gid, gid_t *ngid, uid_t uid)
+{
+	const struct group *grp;
+	struct group grent;
+	char *members[1];
+#ifdef SHADOWGRP
+	const struct sgrp *sg;
+#endif
+
+	/*
+	 * Start by seeing if the named group already exists. This will be
+	 * very easy to deal with if it does.
+	 */
+	grp = getgrnam (gid);
+	if (NULL == grp) {
+		grp = gr_locate (gid);
+	}
+	if (NULL != grp) {
+		/* The user will use this ID for her primary group */
+		*ngid = grp->gr_gid;
+		/* Don't check gshadow */
+		return 0;
+	}
+
+	if (isdigit (gid[0])) {
+		/*
+		 * The GID is a number, which means either this is a brand
+		 * new group, or an existing group.
+		 */
+
+		if (get_gid (gid, &grent.gr_gid) == 0) {
+			fprintf (stderr,
+			         _("%s: invalid group ID '%s'\n"),
+			         Prog, gid);
+			return -1;
+		}
+
+		/* Look in both the system database (getgrgid) and in the
+		 * internal database (gr_locate_gid), which may contain
+		 * uncommitted changes */
+		if (   (getgrgid ((gid_t) grent.gr_gid) != NULL)
+		    || (gr_locate_gid ((gid_t) grent.gr_gid) != NULL)) {
+			/* The user will use this ID for her
+			 * primary group */
+			*ngid = (gid_t) grent.gr_gid;
+			return 0;
+		}
+
+		/* Do not create groups with GID == (gid_t)-1 */
+		if (grent.gr_gid == (gid_t)-1) {
+			fprintf (stderr,
+			         _("%s: invalid group ID '%s'\n"),
+			         Prog, gid);
+			return -1;
+		}
+	} else {
+		/* The gid parameter can be "" or a name which is not
+		 * already the name of an existing group.
+		 * In both cases, figure out what group ID can be used.
+		 */
+		if (find_new_gid(rflg, &grent.gr_gid, &uid) < 0) {
+			return -1;
+		}
+	}
+
+	/*
+	 * Now I have all of the fields required to create the new group.
+	 */
+	if (('\0' != gid[0]) && (!isdigit (gid[0]))) {
+		grent.gr_name = xstrdup (gid);
+	} else {
+		grent.gr_name = xstrdup (name);
+/* FIXME: check if the group exists */
+	}
+
+	/* Check if this is a valid group name */
+	if (!is_valid_group_name (grent.gr_name)) {
+		fprintf (stderr,
+		         _("%s: invalid group name '%s'\n"),
+		         Prog, grent.gr_name);
+		free (grent.gr_name);
+		return -1;
+	}
+
+	grent.gr_passwd = "*";	/* XXX warning: const */
+	members[0] = NULL;
+	grent.gr_mem = members;
+
+	*ngid = grent.gr_gid;
+
+#ifdef SHADOWGRP
+	if (is_shadow_grp) {
+		sg = sgr_locate (grent.gr_name);
+
+		if (NULL != sg) {
+			fprintf (stderr,
+			         _("%s: group '%s' is a shadow group, but does not exist in /etc/group\n"),
+			         Prog, grent.gr_name);
+			return -1;
+		}
+	}
+#endif
+
+#ifdef SHADOWGRP
+	if (is_shadow_grp) {
+		struct sgrp sgrent;
+		char *admins[1];
+		sgrent.sg_name = grent.gr_name;
+		sgrent.sg_passwd = "*";	/* XXX warning: const */
+		grent.gr_passwd  = "x";	/* XXX warning: const */
+		admins[0] = NULL;
+		sgrent.sg_adm = admins;
+		sgrent.sg_mem = members;
+
+		if (sgr_update (&sgrent) == 0) {
+			return -1;
+		}
+	}
+#endif
+
+	if (gr_update (&grent) == 0) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static int get_user_id (const char *uid, uid_t *nuid) {
+
+	/*
+	 * The first guess for the UID is either the numerical UID that the
+	 * caller provided, or the next available UID.
+	 */
+	if (isdigit (uid[0])) {
+		if ((get_uid (uid, nuid) == 0) || (*nuid == (uid_t)-1)) {
+			fprintf (stderr,
+			         _("%s: invalid user ID '%s'\n"),
+			         Prog, uid);
+			return -1;
+		}
+	} else {
+		if ('\0' != uid[0]) {
+			const struct passwd *pwd;
+			/* local, no need for xgetpwnam */
+			pwd = getpwnam (uid);
+			if (NULL == pwd) {
+				pwd = pw_locate (uid);
+			}
+
+			if (NULL != pwd) {
+				*nuid = pwd->pw_uid;
+			} else {
+				fprintf (stderr,
+				         _("%s: user '%s' does not exist\n"),
+				         Prog, uid);
+				return -1;
+			}
+		} else {
+			if (find_new_uid (rflg, nuid, NULL) < 0) {
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * add_user - create a new user ID
+ */
+static int add_user (const char *name, uid_t uid, gid_t gid)
+{
+	struct passwd pwent;
+
+	/* Check if this is a valid user name */
+	if (!is_valid_user_name (name)) {
+		fprintf (stderr,
+		         _("%s: invalid user name '%s'\n"),
+		         Prog, name);
+		return -1;
+	}
+
+	/*
+	 * I don't want to fill in the entire password structure members
+	 * JUST YET, since there is still more data to be added. So, I fill
+	 * in the parts that I have.
+	 */
+	pwent.pw_name = xstrdup (name);
+	pwent.pw_uid = uid;
+	pwent.pw_passwd = "x";	/* XXX warning: const */
+	pwent.pw_gid = gid;
+	pwent.pw_gecos = "";	/* XXX warning: const */
+	pwent.pw_dir = "";	/* XXX warning: const */
+	pwent.pw_shell = "";	/* XXX warning: const */
+
+	return (pw_update (&pwent) == 0) ? -1 : 0;
+}
+
+#ifndef USE_PAM
+/* 
+ * update_passwd - update the password in the passwd entry
+ *
+ * Return 0 if successful.
+ */
+static int update_passwd (struct passwd *pwd, const char *password)
+{
+	void *crypt_arg = NULL;
+	char *cp;
+	if (crypt_method != NULL) {
+#ifdef USE_SHA_CRYPT
+		if (sflg) {
+			crypt_arg = &sha_rounds;
+		}
+#endif
+	}
+
+	if ((crypt_method != NULL) && (0 == strcmp(crypt_method, "NONE"))) {
+		pwd->pw_passwd = (char *)password;
+	} else {
+		const char *salt = crypt_make_salt (crypt_method, crypt_arg);
+		cp = pw_encrypt (password, salt);
+		if (NULL == cp) {
+			fprintf (stderr,
+			         _("%s: failed to crypt password with salt '%s': %s\n"),
+			         Prog, salt, strerror (errno));
+			return 1;
+		}
+		pwd->pw_passwd = cp;
+	}
+
+	return 0;
+}
+#endif				/* !USE_PAM */
+
+/*
+ * add_passwd - add or update the encrypted password
+ */
+static int add_passwd (struct passwd *pwd, const char *password)
+{
+	const struct spwd *sp;
+	struct spwd spent;
+	char *cp;
+
+#ifndef USE_PAM
+	void *crypt_arg = NULL;
+	if (crypt_method != NULL) {
+#ifdef USE_SHA_CRYPT
+		if (sflg) {
+			crypt_arg = &sha_rounds;
+		}
+#endif				/* USE_SHA_CRYPT */
+	}
+
+	/*
+	 * In the case of regular password files, this is real easy - pwd
+	 * points to the entry in the password file. Shadow files are
+	 * harder since there are zillions of things to do ...
+	 */
+	if (!is_shadow) {
+		return update_passwd (pwd, password);
+	}
+#endif				/* USE_PAM */
+
+	/*
+	 * Do the first and easiest shadow file case. The user already
+	 * exists in the shadow password file.
+	 */
+	sp = spw_locate (pwd->pw_name);
+#ifndef USE_PAM
+	if (NULL != sp) {
+		spent = *sp;
+		if (   (NULL != crypt_method)
+		    && (0 == strcmp(crypt_method, "NONE"))) {
+			spent.sp_pwdp = (char *)password;
+		} else {
+			const char *salt = crypt_make_salt (crypt_method,
+			                                    crypt_arg);
+			cp = pw_encrypt (password, salt);
+			if (NULL == cp) {
+				fprintf (stderr,
+				         _("%s: failed to crypt password with salt '%s': %s\n"),
+				         Prog, salt, strerror (errno));
+				return 1;
+			}
+			spent.sp_pwdp = cp;
+		}
+		spent.sp_lstchg = (long) gettime () / SCALE;
+		if (0 == spent.sp_lstchg) {
+			/* Better disable aging than requiring a password
+			 * change */
+			spent.sp_lstchg = -1;
+		}
+		return (spw_update (&spent) == 0);
+	}
+
+	/*
+	 * Pick the next easiest case - the user has an encrypted password
+	 * which isn't equal to "x". The password was set to "x" earlier
+	 * when the entry was created, so this user would have to have had
+	 * the password set someplace else.
+	 */
+	if (strcmp (pwd->pw_passwd, "x") != 0) {
+		return update_passwd (pwd, password);
+	}
+#else				/* USE_PAM */
+	/*
+	 * If there is already a shadow entry, do not touch it.
+	 * If there is already a passwd entry with a password, do not
+	 * touch it.
+	 * The password will be updated later for all users using PAM.
+	 */
+	if (   (NULL != sp)
+	    || (strcmp (pwd->pw_passwd, "x") != 0)) {
+		return 0;
+	}
+#endif				/* USE_PAM */
+
+	/*
+	 * Now the really hard case - I need to create an entirely new
+	 * shadow password file entry.
+	 */
+	spent.sp_namp = pwd->pw_name;
+#ifndef USE_PAM
+	if ((crypt_method != NULL) && (0 == strcmp(crypt_method, "NONE"))) {
+		spent.sp_pwdp = (char *)password;
+	} else {
+		const char *salt = crypt_make_salt (crypt_method, crypt_arg);
+		cp = pw_encrypt (password, salt);
+		if (NULL == cp) {
+			fprintf (stderr,
+			         _("%s: failed to crypt password with salt '%s': %s\n"),
+			         Prog, salt, strerror (errno));
+			return 1;
+		}
+		spent.sp_pwdp = cp;
+	}
+#else
+	/*
+	 * Lock the password.
+	 * The password will be updated later for all users using PAM.
+	 */
+	spent.sp_pwdp = "!";
+#endif
+	spent.sp_lstchg = (long) gettime () / SCALE;
+	if (0 == spent.sp_lstchg) {
+		/* Better disable aging than requiring a password change */
+		spent.sp_lstchg = -1;
+	}
+	spent.sp_min    = getdef_num ("PASS_MIN_DAYS", 0);
+	/* 10000 is infinity this week */
+	spent.sp_max    = getdef_num ("PASS_MAX_DAYS", 10000);
+	spent.sp_warn   = getdef_num ("PASS_WARN_AGE", -1);
+	spent.sp_inact  = -1;
+	spent.sp_expire = -1;
+	spent.sp_flag   = SHADOW_SP_FLAG_UNSET;
+
+	return (spw_update (&spent) == 0);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ *	It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+	int c;
+	static struct option long_options[] = {
+#ifndef USE_PAM
+		{"crypt-method", required_argument, NULL, 'c'},
+#endif				/* !USE_PAM */
+		{"help",         no_argument,       NULL, 'h'},
+		{"system",       no_argument,       NULL, 'r'},
+		{"root",         required_argument, NULL, 'R'},
+#ifndef USE_PAM
+#ifdef USE_SHA_CRYPT
+		{"sha-rounds",   required_argument, NULL, 's'},
+#endif				/* USE_SHA_CRYPT */
+#endif				/* !USE_PAM */
+		{NULL, 0, NULL, '\0'}
+	};
+
+	while ((c = getopt_long (argc, argv,
+#ifndef USE_PAM
+#ifdef USE_SHA_CRYPT
+	                         "c:hrs:",
+#else				/* !USE_SHA_CRYPT */
+	                         "c:hr",
+#endif				/* !USE_SHA_CRYPT */
+#else				/* USE_PAM */
+	                         "hr",
+#endif
+	                         long_options, NULL)) != -1) {
+		switch (c) {
+#ifndef USE_PAM
+		case 'c':
+			crypt_method = optarg;
+			break;
+#endif				/* !USE_PAM */
+		case 'h':
+			usage (EXIT_SUCCESS);
+			break;
+		case 'r':
+			rflg = true;
+			break;
+		case 'R': /* no-op, handled in process_root_flag () */
+			break;
+#ifndef USE_PAM
+#ifdef USE_SHA_CRYPT
+		case 's':
+			sflg = true;
+			if (getlong(optarg, &sha_rounds) == 0) {
+				fprintf (stderr,
+				         _("%s: invalid numeric argument '%s'\n"),
+				         Prog, optarg);
+				usage (EXIT_FAILURE);
+			}
+			break;
+#endif				/* USE_SHA_CRYPT */
+#endif				/* !USE_PAM */
+		default:
+			usage (EXIT_FAILURE);
+			break;
+		}
+	}
+
+	if (   (optind != argc)
+	    && (optind + 1 != argc)) {
+		usage (EXIT_FAILURE);
+	}
+
+	if (argv[optind] != NULL) {
+		if (freopen (argv[optind], "r", stdin) == NULL) {
+			char buf[BUFSIZ];
+			snprintf (buf, sizeof buf, "%s: %s", Prog, argv[1]);
+			perror (buf);
+			fail_exit (EXIT_FAILURE);
+		}
+	}
+
+	/* validate options */
+	check_flags ();
+}
+
+/*
+ * check_flags - check flags and parameters consistency
+ *
+ *	It will not return if an error is encountered.
+ */
+static void check_flags (void)
+{
+#ifndef USE_PAM
+#ifdef USE_SHA_CRYPT
+	if (sflg && !cflg) {
+		fprintf (stderr,
+		         _("%s: %s flag is only allowed with the %s flag\n"),
+		         Prog, "-s", "-c");
+		usage (EXIT_FAILURE);
+	}
+#endif				/* USE_SHA_CRYPT */
+
+	if (cflg) {
+		if (   (0 != strcmp (crypt_method, "DES"))
+		    && (0 != strcmp (crypt_method, "MD5"))
+		    && (0 != strcmp (crypt_method, "NONE"))
+#ifdef USE_SHA_CRYPT
+		    && (0 != strcmp (crypt_method, "SHA256"))
+		    && (0 != strcmp (crypt_method, "SHA512"))
+#endif				/* USE_SHA_CRYPT */
+		    ) {
+			fprintf (stderr,
+			         _("%s: unsupported crypt method: %s\n"),
+			         Prog, crypt_method);
+			usage (EXIT_FAILURE);
+		}
+	}
+#endif				/* !USE_PAM */
+}
+
+/*
+ * check_perms - check if the caller is allowed to add a group
+ *
+ *	With PAM support, the setuid bit can be set on groupadd to allow
+ *	non-root users to groups.
+ *	Without PAM support, only users who can write in the group databases
+ *	can add groups.
+ *
+ *	It will not return if the user is not allowed.
+ */
+static void check_perms (void)
+{
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+	pam_handle_t *pamh = NULL;
+	int retval;
+	struct passwd *pampw;
+
+	pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+	if (NULL == pampw) {
+		fprintf (stderr,
+		         _("%s: Cannot determine your user name.\n"),
+		         Prog);
+		fail_exit (EXIT_FAILURE);
+	}
+
+	retval = pam_start ("newusers", pampw->pw_name, &conv, &pamh);
+
+	if (PAM_SUCCESS == retval) {
+		retval = pam_authenticate (pamh, 0);
+	}
+
+	if (PAM_SUCCESS == retval) {
+		retval = pam_acct_mgmt (pamh, 0);
+	}
+
+	if (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 (EXIT_FAILURE);
+	}
+	(void) pam_end (pamh, retval);
+#endif				/* USE_PAM */
+#endif				/* ACCT_TOOLS_SETUID */
+}
+
+/*
+ * open_files - lock and open the password, group and shadow databases
+ */
+static void open_files (void)
+{
+	/*
+	 * Lock the password files and open them for update. This will bring
+	 * all of the entries into memory where they may be searched for an
+	 * modified, or new entries added. The password file is the key - if
+	 * it gets locked, assume the others can be locked right away.
+	 */
+	if (pw_lock () == 0) {
+		fprintf (stderr,
+		         _("%s: cannot lock %s; try again later.\n"),
+		         Prog, pw_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+	pw_locked = true;
+	if (is_shadow) {
+		if (spw_lock () == 0) {
+			fprintf (stderr,
+			         _("%s: cannot lock %s; try again later.\n"),
+			         Prog, spw_dbname ());
+			fail_exit (EXIT_FAILURE);
+		}
+		spw_locked = true;
+	}
+	if (gr_lock () == 0) {
+		fprintf (stderr,
+		         _("%s: cannot lock %s; try again later.\n"),
+		         Prog, gr_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+	gr_locked = true;
+#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 (EXIT_FAILURE);
+		}
+		sgr_locked = true;
+	}
+#endif
+#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 (EXIT_FAILURE);
+		}
+		sub_uid_locked = true;
+	}
+	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 (EXIT_FAILURE);
+		}
+		sub_gid_locked = true;
+	}
+#endif				/* ENABLE_SUBIDS */
+
+	if (pw_open (O_CREAT | O_RDWR) == 0) {
+		fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+	if (is_shadow && (spw_open (O_CREAT | O_RDWR) == 0)) {
+		fprintf (stderr, _("%s: cannot open %s\n"), Prog, spw_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+	if (gr_open (O_CREAT | O_RDWR) == 0) {
+		fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+#ifdef SHADOWGRP
+	if (is_shadow_grp && (sgr_open (O_CREAT | O_RDWR) == 0)) {
+		fprintf (stderr, _("%s: cannot open %s\n"), Prog, sgr_dbname ());
+		fail_exit (EXIT_FAILURE);
+	}
+#endif
+#ifdef ENABLE_SUBIDS
+	if (is_sub_uid) {
+		if (sub_uid_open (O_CREAT | O_RDWR) == 0) {
+			fprintf (stderr,
+			         _("%s: cannot open %s\n"),
+			         Prog, sub_uid_dbname ());
+			fail_exit (EXIT_FAILURE);
+		}
+	}
+	if (is_sub_gid) {
+		if (sub_gid_open (O_CREAT | O_RDWR) == 0) {
+			fprintf (stderr,
+			         _("%s: cannot open %s\n"),
+			         Prog, sub_gid_dbname ());
+			fail_exit (EXIT_FAILURE);
+		}
+	}
+#endif				/* ENABLE_SUBIDS */
+}
+
+/*
+ * close_files - close and unlock the password, group and shadow databases
+ */
+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 (EXIT_FAILURE);
+	}
+	if (pw_unlock () == 0) {
+		fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
+		/* continue */
+	}
+	pw_locked = false;
+
+	if (is_shadow) {
+		if (spw_close () == 0) {
+			fprintf (stderr,
+			         _("%s: failure while writing changes to %s\n"),
+			         Prog, spw_dbname ());
+			SYSLOG ((LOG_ERR, "failure while writing changes to %s", spw_dbname ()));
+			fail_exit (EXIT_FAILURE);
+		}
+		if (spw_unlock () == 0) {
+			fprintf (stderr,
+			         _("%s: failed to unlock %s\n"),
+			         Prog, spw_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
+			/* continue */
+		}
+		spw_locked = false;
+	}
+
+	if (gr_close () == 0) {
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, gr_dbname ());
+		SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ()));
+		fail_exit (EXIT_FAILURE);
+	}
+#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 (EXIT_FAILURE);
+	}
+	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 (EXIT_FAILURE);
+	}
+#endif				/* ENABLE_SUBIDS */
+
+	if (gr_unlock () == 0) {
+		fprintf (stderr,
+		         _("%s: failed to unlock %s\n"),
+		         Prog, gr_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
+		/* continue */
+	}
+	gr_locked = false;
+
+#ifdef SHADOWGRP
+	if (is_shadow_grp) {
+		if (sgr_close () == 0) {
+			fprintf (stderr,
+			         _("%s: failure while writing changes to %s\n"),
+			         Prog, sgr_dbname ());
+			SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ()));
+			fail_exit (EXIT_FAILURE);
+		}
+		if (sgr_unlock () == 0) {
+			fprintf (stderr,
+			         _("%s: failed to unlock %s\n"),
+			         Prog, sgr_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
+			/* continue */
+		}
+		sgr_locked = false;
+	}
+#endif
+#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 ()));
+			/* 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 ()));
+			/* continue */
+		}
+		sub_gid_locked = false;
+	}
+#endif				/* ENABLE_SUBIDS */
+}
+
+int main (int argc, char **argv)
+{
+	char buf[BUFSIZ];
+	char *fields[8];
+	int nfields;
+	char *cp;
+	const struct passwd *pw;
+	struct passwd newpw;
+	int errors = 0;
+	int line = 0;
+	uid_t uid;
+	gid_t gid;
+#ifdef USE_PAM
+	int *lines = NULL;
+	char **usernames = NULL;
+	char **passwords = NULL;
+	unsigned int nusers = 0;
+#endif				/* USE_PAM */
+
+	Prog = Basename (argv[0]);
+
+	(void) setlocale (LC_ALL, "");
+	(void) bindtextdomain (PACKAGE, LOCALEDIR);
+	(void) textdomain (PACKAGE);
+
+	/* FIXME: will not work with an input file */
+	process_root_flag ("-R", argc, argv);
+
+	OPENLOG ("newusers");
+
+	process_flags (argc, argv);
+
+	check_perms ();
+
+	is_shadow = spw_file_present ();
+
+#ifdef SHADOWGRP
+	is_shadow_grp = sgr_file_present ();
+#endif
+#ifdef ENABLE_SUBIDS
+	is_sub_uid = sub_uid_file_present () && !rflg;
+	is_sub_gid = sub_gid_file_present () && !rflg;
+#endif				/* ENABLE_SUBIDS */
+
+	open_files ();
+
+	/*
+	 * Read each line. The line has the same format as a password file
+	 * entry, except that certain fields are not constrained to be
+	 * numerical values. If a group ID is entered which does not already
+	 * exist, an attempt is made to allocate the same group ID as the
+	 * numerical user ID. Should that fail, the next available group ID
+	 * over 100 is allocated. The pw_gid field will be updated with that
+	 * value.
+	 */
+	while (fgets (buf, (int) sizeof buf, stdin) != (char *) 0) {
+		line++;
+		cp = strrchr (buf, '\n');
+		if (NULL != cp) {
+			*cp = '\0';
+		} else {
+			if (feof (stdin) == 0) {
+				fprintf (stderr,
+				         _("%s: line %d: line too long\n"),
+				         Prog, line);
+				errors++;
+				continue;
+			}
+		}
+
+		/*
+		 * Break the string into fields and screw around with them.
+		 * There MUST be 7 colon separated fields, although the
+		 * values aren't that particular.
+		 */
+		for (cp = buf, nfields = 0; nfields < 7; nfields++) {
+			fields[nfields] = cp;
+			cp = strchr (cp, ':');
+			if (NULL != cp) {
+				*cp = '\0';
+				cp++;
+			} else {
+				break;
+			}
+		}
+		if (nfields != 6) {
+			fprintf (stderr, _("%s: line %d: invalid line\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+
+		/*
+		 * First check if we have to create or update an user
+		 */
+		pw = pw_locate (fields[0]);
+		/* local, no need for xgetpwnam */
+		if (   (NULL == pw)
+		    && (getpwnam (fields[0]) != NULL)) {
+			fprintf (stderr, _("%s: cannot update the entry of user %s (not in the passwd database)\n"), Prog, fields[0]);
+			errors++;
+			continue;
+		}
+
+		if (   (NULL == pw)
+		    && (get_user_id (fields[2], &uid) != 0)) {
+			fprintf (stderr,
+			         _("%s: line %d: can't create user\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+
+		/*
+		 * Processed is the group name. A new group will be
+		 * created if the group name is non-numeric and does not
+		 * already exist. If the group name is a number (which is not
+		 * an existing GID), a group with the same name as the user
+		 * will be created, with the given GID. The given or created
+		 * group will be the primary group of the user. If
+		 * there is no named group to be a member of, the UID will
+		 * be figured out and that value will be a candidate for a
+		 * new group, if that group ID exists, a whole new group ID
+		 * will be made up.
+		 */
+		if (   (NULL == pw)
+		    && (add_group (fields[0], fields[3], &gid, uid) != 0)) {
+			fprintf (stderr,
+			         _("%s: line %d: can't create group\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+
+		/*
+		 * Now we work on the user ID. It has to be specified either
+		 * as a numerical value, or left blank. If it is a numerical
+		 * value, that value will be used, otherwise the next
+		 * available user ID is computed and used. After this there
+		 * will at least be a (struct passwd) for the user.
+		 */
+		if (   (NULL == pw)
+		    && (add_user (fields[0], uid, gid) != 0)) {
+			fprintf (stderr,
+			         _("%s: line %d: can't create user\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+
+		/*
+		 * The password, gecos field, directory, and shell fields
+		 * all come next.
+		 */
+		pw = pw_locate (fields[0]);
+		if (NULL == pw) {
+			fprintf (stderr,
+			         _("%s: line %d: user '%s' does not exist in %s\n"),
+			         Prog, line, fields[0], pw_dbname ());
+			errors++;
+			continue;
+		}
+		newpw = *pw;
+
+#ifdef USE_PAM
+		/* keep the list of user/password for later update by PAM */
+		nusers++;
+		lines     = realloc (lines,     sizeof (lines[0])     * nusers);
+		usernames = realloc (usernames, sizeof (usernames[0]) * nusers);
+		passwords = realloc (passwords, sizeof (passwords[0]) * nusers);
+		lines[nusers-1]     = line;
+		usernames[nusers-1] = strdup (fields[0]);
+		passwords[nusers-1] = strdup (fields[1]);
+#endif				/* USE_PAM */
+		if (add_passwd (&newpw, fields[1]) != 0) {
+			fprintf (stderr,
+			         _("%s: line %d: can't update password\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+		if ('\0' != fields[4][0]) {
+			newpw.pw_gecos = fields[4];
+		}
+
+		if ('\0' != fields[5][0]) {
+			newpw.pw_dir = fields[5];
+		}
+
+		if ('\0' != fields[6][0]) {
+			newpw.pw_shell = fields[6];
+		}
+
+		if (   ('\0' != fields[5][0])
+		    && (access (newpw.pw_dir, F_OK) != 0)) {
+/* FIXME: should check for directory */
+			mode_t msk = 0777 & ~getdef_num ("UMASK",
+			                                 GETDEF_DEFAULT_UMASK);
+			if (mkdir (newpw.pw_dir, msk) != 0) {
+				fprintf (stderr,
+				         _("%s: line %d: mkdir %s failed: %s\n"),
+				         Prog, line, newpw.pw_dir,
+				         strerror (errno));
+			} else if (chown (newpw.pw_dir,
+			                  newpw.pw_uid,
+			                  newpw.pw_gid) != 0) {
+				fprintf (stderr,
+				         _("%s: line %d: chown %s failed: %s\n"),
+				         Prog, line, newpw.pw_dir,
+				         strerror (errno));
+			}
+		}
+
+		/*
+		 * Update the password entry with the new changes made.
+		 */
+		if (pw_update (&newpw) == 0) {
+			fprintf (stderr,
+			         _("%s: line %d: can't update entry\n"),
+			         Prog, line);
+			errors++;
+			continue;
+		}
+
+#ifdef ENABLE_SUBIDS
+		/*
+		 * Add subordinate uids if the user does not have them.
+		 */
+		if (is_sub_uid && !sub_uid_assigned(fields[0])) {
+			uid_t sub_uid_start = 0;
+			unsigned long sub_uid_count = 0;
+			if (find_new_sub_uids(fields[0], &sub_uid_start, &sub_uid_count) == 0) {
+				if (sub_uid_add(fields[0], sub_uid_start, sub_uid_count) == 0) {
+					fprintf (stderr,
+						_("%s: failed to prepare new %s entry\n"),
+						Prog, sub_uid_dbname ());
+				}
+			} else {
+				fprintf (stderr,
+					_("%s: can't find subordinate user range\n"),
+					Prog);
+				errors++;
+			}
+		}
+
+		/*
+		 * Add subordinate gids if the user does not have them.
+		 */
+		if (is_sub_gid && !sub_gid_assigned(fields[0])) {
+			gid_t sub_gid_start = 0;
+			unsigned long sub_gid_count = 0;
+			if (find_new_sub_gids(fields[0], &sub_gid_start, &sub_gid_count) == 0) {
+				if (sub_gid_add(fields[0], sub_gid_start, sub_gid_count) == 0) {
+					fprintf (stderr,
+						_("%s: failed to prepare new %s entry\n"),
+						Prog, sub_uid_dbname ());
+				}
+			} else {
+				fprintf (stderr,
+					_("%s: can't find subordinate group range\n"),
+					Prog);
+				errors++;
+			}
+		}
+#endif				/* ENABLE_SUBIDS */
+	}
+
+	/*
+	 * Any detected errors will cause the entire set of changes to be
+	 * aborted. Unlocking the password file will cause all of the
+	 * changes to be ignored. Otherwise the file is closed, causing the
+	 * changes to be written out all at once, and then unlocked
+	 * afterwards.
+	 */
+	if (0 != errors) {
+		fprintf (stderr,
+		         _("%s: error detected, changes ignored\n"), Prog);
+		fail_exit (EXIT_FAILURE);
+	}
+
+	close_files ();
+
+	nscd_flush_cache ("passwd");
+	nscd_flush_cache ("group");
+
+#ifdef USE_PAM
+	unsigned int i;
+	/* Now update the passwords using PAM */
+	for (i = 0; i < nusers; i++) {
+		if (do_pam_passwd_non_interractive ("newusers", usernames[i], passwords[i]) != 0) {
+			fprintf (stderr,
+			         _("%s: (line %d, user %s) password not changed\n"),
+			         Prog, lines[i], usernames[i]);
+			errors++;
+		}
+	}
+#endif				/* USE_PAM */
+
+	return ((0 == errors) ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+