[thirdparty/util-linux.git] / login-utils / chsh.c

/*
 *   chsh.c -- change your login shell
 *   (c) 1994 by salvatore valente <svalente@athena.mit.edu>
 *   (c) 2012 by Cody Maloney <cmaloney@theoreticalchaos.com>
 *
 *   this program is free software.  you can redistribute it and
 *   modify it under the terms of the gnu general public license.
 *   there is no warranty.
 *
 *   $Author: aebr $
 *   $Revision: 1.19 $
 *   $Date: 1998/06/11 22:30:14 $
 *
 * Updated Thu Oct 12 09:33:15 1995 by faith@cs.unc.edu with security
 *   patches from Zefram <A.Main@dcs.warwick.ac.uk>
 *
 * Updated Mon Jul  1 18:46:22 1996 by janl@math.uio.no with security
 *   suggestion from Zefram.  Disallowing users with shells not in /etc/shells
 *   from changing their shell.
 *
 *   1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
 *   - added Native Language Support
 */

#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>

#include "c.h"
#include "env.h"
#include "closestream.h"
#include "islocal.h"
#include "nls.h"
#include "pathnames.h"
#include "setpwnam.h"
#include "strutils.h"
#include "xalloc.h"

#include "ch-common.h"

#ifdef HAVE_LIBSELINUX
# include <selinux/selinux.h>
# include "selinux_utils.h"
#endif


#ifdef HAVE_LIBUSER
# include <libuser/user.h>
# include "libuser.h"
#elif CHFN_CHSH_PASSWORD
# include "auth.h"
#endif

#ifdef HAVE_LIBREADLINE
# define _FUNCTION_DEF
# include <readline/readline.h>
#endif

struct sinfo {
	char *username;
	char *shell;
};


static void __attribute__((__noreturn__)) usage (FILE *fp)
{
	fputs(USAGE_HEADER, fp);
	fprintf(fp, _(" %s [options] [<username>]\n"), program_invocation_short_name);

	fputs(USAGE_SEPARATOR, fp);
	fputs(_("Change your login shell.\n"), fp);

	fputs(USAGE_OPTIONS, fp);
	fputs(_(" -s, --shell <shell>  specify login shell\n"), fp);
	fputs(_(" -l, --list-shells    print list of shells and exit\n"), fp);
	fputs(USAGE_SEPARATOR, fp);
	fputs(_(" -u, --help     display this help and exit\n"), fp);
	fputs(_(" -v, --version  output version information and exit\n"), fp);
	fprintf(fp, USAGE_MAN_TAIL("chsh(1)"));
	exit(fp == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}

/*
 *  get_shell_list () -- if the given shell appears in /etc/shells,
 *	return true.  if not, return false.
 *	if the given shell is NULL, /etc/shells is outputted to stdout.
 */
static int get_shell_list(const char *shell_name)
{
	FILE *fp;
	int found = 0;
	char *buf = NULL;
	size_t sz = 0;
	ssize_t len;

	fp = fopen(_PATH_SHELLS, "r");
	if (!fp) {
		if (!shell_name)
			warnx(_("No known shells."));
		return 0;
	}
	while ((len = getline(&buf, &sz, fp)) != -1) {
		/* ignore comments and blank lines */
		if (*buf == '#' || len < 2)
			continue;
		/* strip the ending newline */
		if (buf[len - 1] == '\n')
			buf[len - 1] = 0;
		/* check or output the shell */
		if (shell_name) {
			if (!strcmp(shell_name, buf)) {
				found = 1;
				break;
			}
		} else
			printf("%s\n", buf);
	}
	fclose(fp);
	free(buf);
	return found;
}

/*
 *  parse_argv () --
 *	parse the command line arguments, and fill in "pinfo" with any
 *	information from the command line.
 */
static void parse_argv(int argc, char **argv, struct sinfo *pinfo)
{
	static const struct option long_options[] = {
		{"shell",       required_argument, NULL, 's'},
		{"list-shells", no_argument,       NULL, 'l'},
		{"help",        no_argument,       NULL, 'h'},
		{"version",     no_argument,       NULL, 'v'},
		{NULL, 0, NULL, 0},
	};
	int c;

	while ((c = getopt_long(argc, argv, "s:lhuv", long_options, NULL)) != -1) {
		switch (c) {
		case 'v':
			printf(UTIL_LINUX_VERSION);
			exit(EXIT_SUCCESS);
		case 'u': /* deprecated */
		case 'h':
			usage(stdout);
		case 'l':
			get_shell_list(NULL);
			exit(EXIT_SUCCESS);
		case 's':
			if (!optarg)
				usage(stderr);
			pinfo->shell = optarg;
			break;
		default:
			errtryhelp(EXIT_FAILURE);
		}
	}
	/* done parsing arguments.  check for a username. */
	if (optind < argc) {
		if (optind + 1 < argc)
			usage(stderr);
		pinfo->username = argv[optind];
	}
}

/*
 *  ask_new_shell () --
 *	ask the user for a shell and return it.
 */
static char *ask_new_shell(char *question, char *oldshell)
{
	int len;
	char *ans = NULL;
#ifndef HAVE_LIBREADLINE
	size_t dummy = 0;
#endif

	if (!oldshell)
		oldshell = "";
	printf("%s [%s]: ", question, oldshell);
#ifdef HAVE_LIBREADLINE
	if ((ans = readline(NULL)) == NULL)
#else
	if (getline(&ans, &dummy, stdin) < 0)
#endif
		return NULL;
	/* remove the newline at the end of ans. */
	ltrim_whitespace((unsigned char *) ans);
	len = rtrim_whitespace((unsigned char *) ans);
	if (len == 0)
		return NULL;
	return ans;
}

/*
 *  check_shell () -- if the shell is completely invalid, print
 *	an error and exit.
 */
static void check_shell(const char *shell)
{
	if (*shell != '/')
		errx(EXIT_FAILURE, _("shell must be a full path name"));
	if (access(shell, F_OK) < 0)
		errx(EXIT_FAILURE, _("\"%s\" does not exist"), shell);
	if (access(shell, X_OK) < 0)
		errx(EXIT_FAILURE, _("\"%s\" is not executable"), shell);
	if (illegal_passwd_chars(shell))
		errx(EXIT_FAILURE, _("%s: has illegal characters"), shell);
	if (!get_shell_list(shell)) {
#ifdef ONLY_LISTED_SHELLS
		if (!getuid())
			warnx(_("Warning: \"%s\" is not listed in %s."), shell,
			      _PATH_SHELLS);
		else
			errx(EXIT_FAILURE,
			     _("\"%s\" is not listed in %s.\n"
			       "Use %s -l to see list."), shell, _PATH_SHELLS,
			     program_invocation_short_name);
#else
		warnx(_("\"%s\" is not listed in %s.\n"
			"Use %s -l to see list."), shell, _PATH_SHELLS,
		       program_invocation_short_name);
#endif
	}
}

int main(int argc, char **argv)
{
	char *oldshell;
	int nullshell = 0;
	const uid_t uid = getuid();
	struct sinfo info = { NULL };
	struct passwd *pw;

	sanitize_env();
	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	atexit(close_stdout);

	parse_argv(argc, argv, &info);
	if (!info.username) {
		pw = getpwuid(uid);
		if (!pw)
			errx(EXIT_FAILURE, _("you (user %d) don't exist."),
			     uid);
	} else {
		pw = getpwnam(info.username);
		if (!pw)
			errx(EXIT_FAILURE, _("user \"%s\" does not exist."),
			     info.username);
	}

#ifndef HAVE_LIBUSER
	if (!(is_local(pw->pw_name)))
		errx(EXIT_FAILURE, _("can only change local entries"));
#endif

#ifdef HAVE_LIBSELINUX
	if (is_selinux_enabled() > 0) {
		if (uid == 0) {
			access_vector_t av = get_access_vector("passwd", "chsh");

			if (selinux_check_passwd_access(av) != 0) {
				security_context_t user_context;
				if (getprevcon(&user_context) < 0)
					user_context =
					    (security_context_t) NULL;

				errx(EXIT_FAILURE,
				     _("%s is not authorized to change the shell of %s"),
				     user_context ? : _("Unknown user context"),
				     pw->pw_name);
			}
		}
		if (setupDefaultContext(_PATH_PASSWD) != 0)
			errx(EXIT_FAILURE,
			     _("can't set default context for %s"), _PATH_PASSWD);
	}
#endif

	oldshell = pw->pw_shell;
	if (oldshell == NULL || *oldshell == '\0') {
		oldshell = _PATH_BSHELL;	/* default */
		nullshell = 1;
	}

	/* reality check */
#ifdef HAVE_LIBUSER
	/* If we're setuid and not really root, disallow the password change. */
	if (geteuid() != getuid() && uid != pw->pw_uid) {
#else
	if (uid != 0 && uid != pw->pw_uid) {
#endif
		errno = EACCES;
		err(EXIT_FAILURE,
		    _("running UID doesn't match UID of user we're "
		      "altering, shell change denied"));
	}
	if (uid != 0 && !get_shell_list(oldshell)) {
		errno = EACCES;
		err(EXIT_FAILURE, _("your shell is not in %s, "
				    "shell change denied"), _PATH_SHELLS);
	}

	printf(_("Changing shell for %s.\n"), pw->pw_name);

#if !defined(HAVE_LIBUSER) && defined(CHFN_CHSH_PASSWORD)
	if (!auth_pam("chsh", uid, pw->pw_name)) {
		return EXIT_FAILURE;
	}
#endif
	if (!info.shell) {
		info.shell = ask_new_shell(_("New shell"), oldshell);
		if (!info.shell)
			return EXIT_SUCCESS;
	}

	check_shell(info.shell);

	if (!nullshell && strcmp(oldshell, info.shell) == 0)
		errx(EXIT_SUCCESS, _("Shell not changed."));

#ifdef HAVE_LIBUSER
	if (set_value_libuser("chsh", pw->pw_name, uid,
	    LU_LOGINSHELL, info.shell) < 0)
		errx(EXIT_FAILURE, _("Shell *NOT* changed.  Try again later."));
#else
	pw->pw_shell = info.shell;
	if (setpwnam(pw, ".chsh") < 0)
		err(EXIT_FAILURE, _("setpwnam failed\n"
			"Shell *NOT* changed.  Try again later."));
#endif

	printf(_("Shell changed.\n"));
	return EXIT_SUCCESS;
}
Commit	Line	Data
6dbe3af9 KZ	1	/*
	2	* chsh.c -- change your login shell
	3	* (c) 1994 by salvatore valente <svalente@athena.mit.edu>
6adb1ef2	4	* (c) 2012 by Cody Maloney <cmaloney@theoreticalchaos.com>
6dbe3af9 KZ	5	*
	6	* this program is free software. you can redistribute it and
	7	* modify it under the terms of the gnu general public license.
	8	* there is no warranty.
	9	*
fd6b7a7f	10	* $Author: aebr $
2b6fc908 KZ	11	* $Revision: 1.19 $
2b6fc908 KZ	12	* $Date: 1998/06/11 22:30:14 $
726f69e2 KZ	13	*
726f69e2 KZ	14	* Updated Thu Oct 12 09:33:15 1995 by faith@cs.unc.edu with security
fd6b7a7f KZ	15	* patches from Zefram <A.Main@dcs.warwick.ac.uk>
	16	*
	17	* Updated Mon Jul 1 18:46:22 1996 by janl@math.uio.no with security
	18	* suggestion from Zefram. Disallowing users with shells not in /etc/shells
	19	* from changing their shell.
	20	*
b50945d4	21	* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
7eda085c	22	* - added Native Language Support
6dbe3af9	23	*/
0a065b7a	24
6dbe3af9	25	#include <ctype.h>
0a065b7a	26	#include <errno.h>
6dbe3af9	27	#include <getopt.h>
0a065b7a	28	#include <pwd.h>
0a065b7a SK	29	#include <stdio.h>
	30	#include <stdlib.h>
	31	#include <string.h>
	32	#include <sys/types.h>
	33	#include <unistd.h>
d39d4bf6 KZ	34
d39d4bf6 KZ	35	#include "c.h"
0a065b7a	36	#include "env.h"
439cdf1e	37	#include "closestream.h"
66ee8158	38	#include "islocal.h"
7eda085c	39	#include "nls.h"
7ab59baf	40	#include "pathnames.h"
0a065b7a	41	#include "setpwnam.h"
e323df25	42	#include "strutils.h"
d39d4bf6	43	#include "xalloc.h"
fd6b7a7f	44
144ae70e SK	45	#include "ch-common.h"
144ae70e SK	46
48d7b13a	47	#ifdef HAVE_LIBSELINUX
0a065b7a	48	# include <selinux/selinux.h>
0a065b7a	49	# include "selinux_utils.h"
d03dd608 KZ	50	#endif
d03dd608 KZ	51
6adb1ef2 CM	52
	53	#ifdef HAVE_LIBUSER
	54	# include <libuser/user.h>
	55	# include "libuser.h"
d86918b6	56	#elif CHFN_CHSH_PASSWORD
6adb1ef2 CM	57	# include "auth.h"
	58	#endif
	59
e41ae450 SK	60	#ifdef HAVE_LIBREADLINE
	61	# define _FUNCTION_DEF
	62	# include <readline/readline.h>
	63	#endif
	64
6dbe3af9	65	struct sinfo {
0a065b7a SK	66	char *username;
0a065b7a SK	67	char *shell;
6dbe3af9 KZ	68	};
6dbe3af9 KZ	69
66ee8158	70
abafd686	71	static void __attribute__((__noreturn__)) usage (FILE *fp)
d39d4bf6	72	{
0a065b7a	73	fputs(USAGE_HEADER, fp);
09af3db4	74	fprintf(fp, _(" %s [options] [<username>]\n"), program_invocation_short_name);
451dbcfa BS	75
	76	fputs(USAGE_SEPARATOR, fp);
	77	fputs(_("Change your login shell.\n"), fp);
	78
0a065b7a SK	79	fputs(USAGE_OPTIONS, fp);
	80	fputs(_(" -s, --shell <shell> specify login shell\n"), fp);
	81	fputs(_(" -l, --list-shells print list of shells and exit\n"), fp);
	82	fputs(USAGE_SEPARATOR, fp);
	83	fputs(_(" -u, --help display this help and exit\n"), fp);
	84	fputs(_(" -v, --version output version information and exit\n"), fp);
	85	fprintf(fp, USAGE_MAN_TAIL("chsh(1)"));
	86	exit(fp == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
d39d4bf6	87	}
6dbe3af9	88
5eef6129 SK	89	/*
	90	* get_shell_list () -- if the given shell appears in /etc/shells,
	91	* return true. if not, return false.
	92	* if the given shell is NULL, /etc/shells is outputted to stdout.
	93	*/
561c4858	94	static int get_shell_list(const char *shell_name)
0a065b7a	95	{
5eef6129	96	FILE *fp;
9a5cbe52	97	int found = 0;
1cb122d5	98	char *buf = NULL;
84705c8b KZ	99	size_t sz = 0;
84705c8b KZ	100	ssize_t len;
0a065b7a	101
5eef6129 SK	102	fp = fopen(_PATH_SHELLS, "r");
	103	if (!fp) {
	104	if (!shell_name)
	105	warnx(_("No known shells."));
9a5cbe52	106	return 0;
0a065b7a	107	}
84705c8b KZ	108	while ((len = getline(&buf, &sz, fp)) != -1) {
	109	/* ignore comments and blank lines */
	110	if (*buf == '#' \|\| len < 2)
1cb122d5	111	continue;
5eef6129 SK	112	/* strip the ending newline */
	113	if (buf[len - 1] == '\n')
	114	buf[len - 1] = 0;
5eef6129 SK	115	/* check or output the shell */
	116	if (shell_name) {
	117	if (!strcmp(shell_name, buf)) {
9a5cbe52	118	found = 1;
5eef6129	119	break;
0a065b7a	120	}
5eef6129 SK	121	} else
5eef6129 SK	122	printf("%s\n", buf);
0a065b7a	123	}
5eef6129	124	fclose(fp);
1cb122d5	125	free(buf);
5eef6129	126	return found;
6dbe3af9 KZ	127	}
	128
	129	/*
	130	* parse_argv () --
	131	* parse the command line arguments, and fill in "pinfo" with any
	132	* information from the command line.
	133	*/
0a065b7a SK	134	static void parse_argv(int argc, char *argv, struct sinfo pinfo)
0a065b7a SK	135	{
4a98629b	136	static const struct option long_options[] = {
87918040 SK	137	{"shell", required_argument, NULL, 's'},
	138	{"list-shells", no_argument, NULL, 'l'},
	139	{"help", no_argument, NULL, 'h'},
	140	{"version", no_argument, NULL, 'v'},
	141	{NULL, 0, NULL, 0},
0a065b7a	142	};
68b24d53	143	int c;
0a065b7a	144
631a1954	145	while ((c = getopt_long(argc, argv, "s:lhuv", long_options, NULL)) != -1) {
0a065b7a	146	switch (c) {
0a065b7a SK	147	case 'v':
	148	printf(UTIL_LINUX_VERSION);
	149	exit(EXIT_SUCCESS);
631a1954 AH	150	case 'u': /* deprecated */
631a1954 AH	151	case 'h':
0a065b7a SK	152	usage(stdout);
	153	case 'l':
	154	get_shell_list(NULL);
	155	exit(EXIT_SUCCESS);
	156	case 's':
	157	if (!optarg)
	158	usage(stderr);
	159	pinfo->shell = optarg;
	160	break;
	161	default:
677ec86c	162	errtryhelp(EXIT_FAILURE);
0a065b7a SK	163	}
	164	}
	165	/* done parsing arguments. check for a username. */
	166	if (optind < argc) {
	167	if (optind + 1 < argc)
	168	usage(stderr);
	169	pinfo->username = argv[optind];
6dbe3af9	170	}
6dbe3af9 KZ	171	}
6dbe3af9 KZ	172
6dbe3af9	173	/*
e323df25 SK	174	* ask_new_shell () --
e323df25 SK	175	* ask the user for a shell and return it.
6dbe3af9	176	*/
e323df25	177	static char ask_new_shell(char question, char *oldshell)
0a065b7a SK	178	{
0a065b7a SK	179	int len;
e323df25	180	char *ans = NULL;
e41ae450	181	#ifndef HAVE_LIBREADLINE
e323df25	182	size_t dummy = 0;
e41ae450	183	#endif
0a065b7a	184
e323df25 SK	185	if (!oldshell)
	186	oldshell = "";
	187	printf("%s [%s]: ", question, oldshell);
e41ae450 SK	188	#ifdef HAVE_LIBREADLINE
	189	if ((ans = readline(NULL)) == NULL)
	190	#else
	191	if (getline(&ans, &dummy, stdin) < 0)
	192	#endif
0a065b7a	193	return NULL;
e323df25 SK	194	/* remove the newline at the end of ans. */
	195	ltrim_whitespace((unsigned char *) ans);
	196	len = rtrim_whitespace((unsigned char *) ans);
	197	if (len == 0)
	198	return NULL;
	199	return ans;
6dbe3af9 KZ	200	}
	201
	202	/*
	203	* check_shell () -- if the shell is completely invalid, print
1df0219f	204	* an error and exit.
6dbe3af9	205	*/
1df0219f	206	static void check_shell(const char *shell)
0a065b7a	207	{
1df0219f SK	208	if (*shell != '/')
	209	errx(EXIT_FAILURE, _("shell must be a full path name"));
	210	if (access(shell, F_OK) < 0)
	211	errx(EXIT_FAILURE, _("\"%s\" does not exist"), shell);
	212	if (access(shell, X_OK) < 0)
	213	errx(EXIT_FAILURE, _("\"%s\" is not executable"), shell);
	214	if (illegal_passwd_chars(shell))
	215	errx(EXIT_FAILURE, _("%s: has illegal characters"), shell);
0a065b7a	216	if (!get_shell_list(shell)) {
1df0219f	217	#ifdef ONLY_LISTED_SHELLS
0a065b7a	218	if (!getuid())
1df0219f SK	219	warnx(_("Warning: \"%s\" is not listed in %s."), shell,
1df0219f SK	220	_PATH_SHELLS);
0a065b7a SK	221	else
0a065b7a SK	222	errx(EXIT_FAILURE,
c900336d SK	223	_("\"%s\" is not listed in %s.\n"
c900336d SK	224	"Use %s -l to see list."), shell, _PATH_SHELLS,
0a065b7a	225	program_invocation_short_name);
726f69e2	226	#else
c900336d SK	227	warnx(_("\"%s\" is not listed in %s.\n"
c900336d SK	228	"Use %s -l to see list."), shell, _PATH_SHELLS,
1df0219f	229	program_invocation_short_name);
726f69e2	230	#endif
1df0219f	231	}
6dbe3af9 KZ	232	}
6dbe3af9 KZ	233
5eef6129	234	int main(int argc, char **argv)
0a065b7a	235	{
561c4858	236	char *oldshell;
f6497923	237	int nullshell = 0;
561c4858	238	const uid_t uid = getuid();
87918040	239	struct sinfo info = { NULL };
5eef6129	240	struct passwd *pw;
0a065b7a	241
5eef6129 SK	242	sanitize_env();
	243	setlocale(LC_ALL, "");
	244	bindtextdomain(PACKAGE, LOCALEDIR);
	245	textdomain(PACKAGE);
	246	atexit(close_stdout);
	247
5eef6129	248	parse_argv(argc, argv, &info);
5eef6129 SK	249	if (!info.username) {
	250	pw = getpwuid(uid);
	251	if (!pw)
	252	errx(EXIT_FAILURE, _("you (user %d) don't exist."),
	253	uid);
	254	} else {
	255	pw = getpwnam(info.username);
	256	if (!pw)
	257	errx(EXIT_FAILURE, _("user \"%s\" does not exist."),
	258	info.username);
0a065b7a	259	}
5eef6129 SK	260
	261	#ifndef HAVE_LIBUSER
	262	if (!(is_local(pw->pw_name)))
	263	errx(EXIT_FAILURE, _("can only change local entries"));
	264	#endif
	265
	266	#ifdef HAVE_LIBSELINUX
	267	if (is_selinux_enabled() > 0) {
	268	if (uid == 0) {
dd5ef107 KZ	269	access_vector_t av = get_access_vector("passwd", "chsh");
	270
	271	if (selinux_check_passwd_access(av) != 0) {
5eef6129 SK	272	security_context_t user_context;
	273	if (getprevcon(&user_context) < 0)
	274	user_context =
	275	(security_context_t) NULL;
	276
	277	errx(EXIT_FAILURE,
	278	_("%s is not authorized to change the shell of %s"),
	279	user_context ? : _("Unknown user context"),
	280	pw->pw_name);
0a065b7a	281	}
5eef6129 SK	282	}
	283	if (setupDefaultContext(_PATH_PASSWD) != 0)
	284	errx(EXIT_FAILURE,
	285	_("can't set default context for %s"), _PATH_PASSWD);
6dbe3af9	286	}
5eef6129 SK	287	#endif
	288
	289	oldshell = pw->pw_shell;
f6497923	290	if (oldshell == NULL \|\| *oldshell == '\0') {
5eef6129	291	oldshell = _PATH_BSHELL; /* default */
f6497923 SK	292	nullshell = 1;
f6497923 SK	293	}
5eef6129 SK	294
	295	/* reality check */
	296	#ifdef HAVE_LIBUSER
	297	/* If we're setuid and not really root, disallow the password change. */
	298	if (geteuid() != getuid() && uid != pw->pw_uid) {
	299	#else
	300	if (uid != 0 && uid != pw->pw_uid) {
	301	#endif
	302	errno = EACCES;
	303	err(EXIT_FAILURE,
	304	_("running UID doesn't match UID of user we're "
	305	"altering, shell change denied"));
	306	}
	307	if (uid != 0 && !get_shell_list(oldshell)) {
	308	errno = EACCES;
	309	err(EXIT_FAILURE, _("your shell is not in %s, "
	310	"shell change denied"), _PATH_SHELLS);
	311	}
	312
5eef6129 SK	313	printf(_("Changing shell for %s.\n"), pw->pw_name);
	314
	315	#if !defined(HAVE_LIBUSER) && defined(CHFN_CHSH_PASSWORD)
561c4858	316	if (!auth_pam("chsh", uid, pw->pw_name)) {
5eef6129 SK	317	return EXIT_FAILURE;
	318	}
	319	#endif
561c4858	320	if (!info.shell) {
e323df25	321	info.shell = ask_new_shell(_("New shell"), oldshell);
561c4858	322	if (!info.shell)
5eef6129 SK	323	return EXIT_SUCCESS;
	324	}
	325
1df0219f	326	check_shell(info.shell);
5eef6129	327
f6497923	328	if (!nullshell && strcmp(oldshell, info.shell) == 0)
5eef6129 SK	329	errx(EXIT_SUCCESS, _("Shell not changed."));
	330
	331	#ifdef HAVE_LIBUSER
	332	if (set_value_libuser("chsh", pw->pw_name, uid,
561c4858	333	LU_LOGINSHELL, info.shell) < 0)
5eef6129 SK	334	errx(EXIT_FAILURE, _("Shell NOT changed. Try again later."));
5eef6129 SK	335	#else
561c4858	336	pw->pw_shell = info.shell;
bde91c85	337	if (setpwnam(pw, ".chsh") < 0)
5eef6129 SK	338	err(EXIT_FAILURE, _("setpwnam failed\n"
	339	"Shell NOT changed. Try again later."));
	340	#endif
	341
	342	printf(_("Shell changed.\n"));
	343	return EXIT_SUCCESS;
6dbe3af9	344	}