/*
- * Copyright 1989 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1989 - 1994, 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
* 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.
+ * 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 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.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
+#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
#include "pam_defs.h"
#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
#include <pwd.h>
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
#include <selinux/av_permissions.h>
#endif
-#include "exitcodes.h"
#include "prototypes.h"
#include "defines.h"
#include "pwio.h"
#include "shadowio.h"
+#ifdef WITH_TCB
+#include "tcbfuncs.h"
+#endif
+/*@-exitarg@*/
+#include "exitcodes.h"
+
/*
* Global variables
*/
-static char *Prog;
-
-static int
- dflg = 0, /* set last password change date */
- Eflg = 0, /* set account expiration date */
- Iflg = 0, /* set password inactive after expiration */
- lflg = 0, /* show account aging information */
- mflg = 0, /* set minimum number of days before password change */
- Mflg = 0, /* set maximim number of days before password change */
- Wflg = 0; /* set expiration warning days */
-
-static int locks;
+const char *Prog;
+
+static bool
+ dflg = false, /* set last password change date */
+ Eflg = false, /* set account expiration date */
+ Iflg = false, /* set password inactive after expiration */
+ lflg = false, /* show account aging information */
+ mflg = false, /* set minimum number of days before password change */
+ Mflg = false, /* set maximum number of days before password change */
+ Wflg = false; /* set expiration warning days */
+static bool amroot = false;
+
+static bool pw_locked = false; /* Indicate if the password file is locked */
+static bool spw_locked = false; /* Indicate if the shadow file is locked */
+/* The name and UID of the user being worked on */
+static char user_name[BUFSIZ] = "";
+static uid_t user_uid = -1;
static long mindays;
static long maxdays;
-static long lastday;
+static long lstchgdate;
static long warndays;
static long inactdays;
-static long expdays;
-
-#define EPOCH "1969-12-31"
+static long expdate;
/* local function prototypes */
-static void usage (void);
-static void date_to_str (char *, size_t, time_t);
+static void usage (int status);
+static void date_to_str (char *buf, size_t maxsize, time_t date);
static int new_fields (void);
-static void print_date (time_t);
+static void print_date (time_t date);
static void list_fields (void);
+static void process_flags (int argc, char **argv);
+static void check_flags (int argc, int opt_index);
+static void check_perms (void);
+static void open_files (bool readonly);
+static void close_files (void);
+static void fail_exit (int code);
/*
- * isnum - determine whether or not a string is a number
+ * fail_exit - do some cleanup and exit with the given error code
*/
-int isnum (const char *s)
+static void fail_exit (int code)
{
- while (*s) {
- if (!isdigit (*s))
- return 0;
- s++;
+ 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 */
+ }
}
- return 1;
+ 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 */
+ }
+ }
+ closelog ();
+
+#ifdef WITH_AUDIT
+ if (E_SUCCESS != code) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change age",
+ user_name, (unsigned int) user_uid, 0);
+ }
+#endif
+
+ exit (code);
}
/*
* usage - print command line syntax and exit
*/
-static void usage (void)
+static void usage (int status)
{
- fprintf (stderr, _("Usage: chage [options] [LOGIN]\n"
- "\n"
- "Options:\n"
- " -d, --lastday LAST_DAY set last password change to LAST_DAY\n"
- " -E, --expiredate EXPIRE_DATE set account expiration date to EXPIRE_DATE\n"
- " -h, --help display this help message and exit\n"
- " -I, --inactive INACTIVE set password inactive after expiration\n"
- " to INACTIVE\n"
- " -l, --list show account aging information\n"
- " -m, --mindays MIN_DAYS set minimum number of days before password\n"
- " change to MIN_DAYS\n"
- " -M, --maxdays MAX_DAYS set maximim number of days before password\n"
- " change to MAX_DAYS\n"
- " -W, --warndays WARN_DAYS set expiration warning days to WARN_DAYS\n"
- "\n"));
- exit (E_USAGE);
+ fputs (_("Usage: chage [options] LOGIN\n"
+ "\n"
+ "Options:\n"
+ " -d, --lastday LAST_DAY set date of last password change to LAST_DAY\n"
+ " -E, --expiredate EXPIRE_DATE set account expiration date to EXPIRE_DATE\n"
+ " -h, --help display this help message and exit\n"
+ " -I, --inactive INACTIVE set password inactive after expiration\n"
+ " to INACTIVE\n"
+ " -l, --list show account aging information\n"
+ " -m, --mindays MIN_DAYS set minimum number of days before password\n"
+ " change to MIN_DAYS\n"
+ " -M, --maxdays MAX_DAYS set maximim number of days before password\n"
+ " change to MAX_DAYS\n"
+ " -W, --warndays WARN_DAYS set expiration warning days to WARN_DAYS\n"
+ "\n"), (E_SUCCESS != status) ? stderr : stdout);
+ exit (status);
}
static void date_to_str (char *buf, size_t maxsize, time_t date)
tp = gmtime (&date);
#ifdef HAVE_STRFTIME
- strftime (buf, maxsize, "%Y-%m-%d", tp);
+ (void) strftime (buf, maxsize, "%Y-%m-%d", tp);
#else
- snprintf (buf, maxsize, "%04d-%02d-%02d",
- tp->tm_year + 1900, tp->tm_mon + 1, tp->tm_mday);
+ (void) snprintf (buf, maxsize, "%04d-%02d-%02d",
+ tp->tm_year + 1900, tp->tm_mon + 1, tp->tm_mday);
#endif /* HAVE_STRFTIME */
}
static int new_fields (void)
{
char buf[200];
- char *cp;
- printf (_("Enter the new value, or press ENTER for the default\n"));
- printf ("\n");
+ (void) puts (_("Enter the new value, or press ENTER for the default"));
+ (void) puts ("");
snprintf (buf, sizeof buf, "%ld", mindays);
change_field (buf, sizeof buf, _("Minimum Password Age"));
- if (((mindays = strtol (buf, &cp, 10)) == 0 && *cp)
- || mindays < -1)
+ if ( (getlong (buf, &mindays) == 0)
+ || (mindays < -1)) {
return 0;
+ }
snprintf (buf, sizeof buf, "%ld", maxdays);
change_field (buf, sizeof buf, _("Maximum Password Age"));
- if (((maxdays = strtol (buf, &cp, 10)) == 0 && *cp)
- || maxdays < -1)
+ if ( (getlong (buf, &maxdays) == 0)
+ || (maxdays < -1)) {
return 0;
+ }
- date_to_str (buf, sizeof buf, lastday * SCALE);
+ if (-1 == lstchgdate) {
+ strcpy (buf, "-1");
+ } else {
+ date_to_str (buf, sizeof buf, lstchgdate * SCALE);
+ }
change_field (buf, sizeof buf, _("Last Password Change (YYYY-MM-DD)"));
- if (strcmp (buf, EPOCH) == 0)
- lastday = -1;
- else if ((lastday = strtoday (buf)) == -1)
- return 0;
+ if (strcmp (buf, "-1") == 0) {
+ lstchgdate = -1;
+ } else {
+ lstchgdate = strtoday (buf);
+ if (lstchgdate <= -1) {
+ return 0;
+ }
+ }
snprintf (buf, sizeof buf, "%ld", warndays);
change_field (buf, sizeof buf, _("Password Expiration Warning"));
- if (((warndays = strtol (buf, &cp, 10)) == 0 && *cp)
- || warndays < -1)
+ if ( (getlong (buf, &warndays) == 0)
+ || (warndays < -1)) {
return 0;
+ }
snprintf (buf, sizeof buf, "%ld", inactdays);
change_field (buf, sizeof buf, _("Password Inactive"));
- if (((inactdays = strtol (buf, &cp, 10)) == 0 && *cp)
- || inactdays < -1)
+ if ( (getlong (buf, &inactdays) == 0)
+ || (inactdays < -1)) {
return 0;
+ }
- date_to_str (buf, sizeof buf, expdays * SCALE);
+ if (-1 == expdate) {
+ strcpy (buf, "-1");
+ } else {
+ date_to_str (buf, sizeof buf, expdate * SCALE);
+ }
change_field (buf, sizeof buf,
- _("Account Expiration Date (YYYY-MM-DD)"));
+ _("Account Expiration Date (YYYY-MM-DD)"));
- if (strcmp (buf, EPOCH) == 0)
- expdays = -1;
- else if ((expdays = strtoday (buf)) == -1)
- return 0;
+ if (strcmp (buf, "-1") == 0) {
+ expdate = -1;
+ } else {
+ expdate = strtoday (buf);
+ if (expdate <= -1) {
+ return 0;
+ }
+ }
return 1;
}
char buf[80];
tp = gmtime (&date);
- strftime (buf, sizeof buf, "%b %d, %Y", tp);
- puts (buf);
+ if (NULL == tp) {
+ (void) printf ("time_t: %lu\n", date);
+ } else {
+ (void) strftime (buf, sizeof buf, "%b %d, %Y", tp);
+ (void) puts (buf);
+ }
#else
struct tm *tp;
- char *cp;
+ char *cp = NULL;
tp = gmtime (&date);
- cp = asctime (tp);
- printf ("%6.6s, %4.4s\n", cp + 4, cp + 20);
+ if (NULL != tp) {
+ cp = asctime (tp);
+ }
+ if (NULL != cp) {
+ (void) printf ("%6.6s, %4.4s\n", cp + 4, cp + 20);
+ } else {
+ (void) printf ("time_t: %lu\n", date);
+ }
#endif
}
* The "last change" date is either "never" or the date the password
* was last modified. The date is the number of days since 1/1/1970.
*/
- printf (_("Last password change\t\t\t\t\t: "));
- if (lastday < 0) {
- printf (_("never\n"));
- } else if (lastday == 0) {
- printf (_("password must be changed\n"));
+ (void) fputs (_("Last password change\t\t\t\t\t: "), stdout);
+ if (lstchgdate < 0) {
+ (void) puts (_("never"));
+ } else if (lstchgdate == 0) {
+ (void) puts (_("password must be changed"));
} else {
- changed = lastday * SCALE;
- print_date (changed);
+ changed = lstchgdate * SCALE;
+ print_date ((time_t) changed);
}
/*
* The password expiration date is determined from the last change
* date plus the number of days the password is valid for.
*/
- printf (_("Password expires\t\t\t\t\t: "));
- if (lastday <= 0 || maxdays >= 10000 * (DAY / SCALE)
- || maxdays < 0) {
- printf (_("never\n"));
+ (void) fputs (_("Password expires\t\t\t\t\t: "), stdout);
+ if (lstchgdate == 0) {
+ (void) puts (_("password must be changed"));
+ } else if ( (lstchgdate < 0)
+ || (maxdays >= (10000 * (DAY / SCALE)))
+ || (maxdays < 0)) {
+ (void) puts (_("never"));
} else {
expires = changed + maxdays * SCALE;
- print_date (expires);
+ print_date ((time_t) expires);
}
/*
* number of inactive days is added. The resulting date is when the
* active will be disabled.
*/
- printf (_("Password inactive\t\t\t\t\t: "));
- if (lastday <= 0 || inactdays < 0 ||
- maxdays >= 10000 * (DAY / SCALE) || maxdays < 0) {
- printf (_("never\n"));
+ (void) fputs (_("Password inactive\t\t\t\t\t: "), stdout);
+ if (lstchgdate == 0) {
+ (void) puts (_("password must be changed"));
+ } else if ( (lstchgdate < 0)
+ || (inactdays < 0)
+ || (maxdays >= (10000 * (DAY / SCALE)))
+ || (maxdays < 0)) {
+ (void) puts (_("never"));
} else {
expires = changed + (maxdays + inactdays) * SCALE;
- print_date (expires);
+ print_date ((time_t) expires);
}
/*
* The account will expire on the given date regardless of the
* password expiring or not.
*/
- printf (_("Account expires\t\t\t\t\t\t: "));
- if (expdays < 0) {
- printf (_("never\n"));
+ (void) fputs (_("Account expires\t\t\t\t\t\t: "), stdout);
+ if (expdate < 0) {
+ (void) puts (_("never"));
} else {
- expires = expdays * SCALE;
- print_date (expires);
+ expires = expdate * SCALE;
+ print_date ((time_t) expires);
}
/*
* password expires that the account becomes unusable.
*/
printf (_("Minimum number of days between password change\t\t: %ld\n"),
- mindays);
+ mindays);
printf (_("Maximum number of days between password change\t\t: %ld\n"),
- maxdays);
+ maxdays);
printf (_("Number of days of warning before password expires\t: %ld\n"),
- warndays);
+ warndays);
}
/*
- * chage - change a user's password aging information
- *
- * This command controls the password aging information.
- *
- * The valid options are
+ * process_flags - parse the command line options
*
- * -d set last password change date (*)
- * -E set account expiration date (*)
- * -I set password inactive after expiration (*)
- * -l show account aging information
- * -M set maximim number of days before password change (*)
- * -m set minimum number of days before password change (*)
- * -W set expiration warning days (*)
- *
- * (*) requires root permission to execute.
- *
- * All of the time fields are entered in the internal format which is
- * either seconds or days.
+ * It will not return if an error is encountered.
*/
-
-int main (int argc, char **argv)
+static void process_flags (int argc, char **argv)
{
- const struct spwd *sp;
- struct spwd spwd;
- uid_t ruid;
- gid_t rgid;
- int amroot;
- const struct passwd *pw;
- struct passwd pwent;
- char name[BUFSIZ];
-
-#ifdef USE_PAM
- pam_handle_t *pamh = NULL;
- int retval;
-#endif
-
-#ifdef WITH_AUDIT
- audit_help_open ();
-#endif
- sanitize_env ();
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- ruid = getuid ();
- rgid = getgid ();
- amroot = (ruid == 0);
-#ifdef WITH_SELINUX
- if (amroot && is_selinux_enabled () > 0)
- amroot = (selinux_check_passwd_access (PASSWD__ROOTOK) == 0);
-#endif
-
/*
- * Get the program name so that error messages can use it.
+ * Parse the command line options.
*/
- Prog = Basename (argv[0]);
-
- {
- /*
- * Parse the command line options.
- */
- int option_index = 0;
- int c;
- static struct option long_options[] = {
- {"lastday", required_argument, NULL, 'd'},
- {"expiredate", required_argument, NULL, 'E'},
- {"help", no_argument, NULL, 'h'},
- {"inactive", required_argument, NULL, 'I'},
- {"list", no_argument, NULL, 'l'},
- {"mindays", required_argument, NULL, 'm'},
- {"maxdays", required_argument, NULL, 'M'},
- {"warndays", required_argument, NULL, 'W'},
- {NULL, 0, NULL, '\0'}
- };
-
- while ((c =
- getopt_long (argc, argv, "d:E:hI:lm:M:W:", long_options,
- &option_index)) != -1) {
- switch (c) {
- case 'd':
- dflg++;
- if (!isnum (optarg))
- lastday = strtoday (optarg);
- else
- lastday = strtol (optarg, 0, 10);
- break;
- case 'E':
- Eflg++;
- if (!isnum (optarg))
- expdays = strtoday (optarg);
- else
- expdays = strtol (optarg, 0, 10);
- break;
- case 'h':
- usage ();
- break;
- case 'I':
- Iflg++;
- inactdays = strtol (optarg, 0, 10);
- break;
- case 'l':
- lflg++;
- break;
- case 'm':
- mflg++;
- mindays = strtol (optarg, 0, 10);
- break;
- case 'M':
- Mflg++;
- maxdays = strtol (optarg, 0, 10);
- break;
- case 'W':
- Wflg++;
- warndays = strtol (optarg, 0, 10);
- break;
- default:
- usage ();
+ int option_index = 0;
+ int c;
+ static struct option long_options[] = {
+ {"lastday", required_argument, NULL, 'd'},
+ {"expiredate", required_argument, NULL, 'E'},
+ {"help", no_argument, NULL, 'h'},
+ {"inactive", required_argument, NULL, 'I'},
+ {"list", no_argument, NULL, 'l'},
+ {"mindays", required_argument, NULL, 'm'},
+ {"maxdays", required_argument, NULL, 'M'},
+ {"warndays", required_argument, NULL, 'W'},
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((c =
+ getopt_long (argc, argv, "d:E:hI:lm:M:W:", long_options,
+ &option_index)) != -1) {
+ switch (c) {
+ case 'd':
+ dflg = true;
+ lstchgdate = strtoday (optarg);
+ if (lstchgdate < -1) {
+ fprintf (stderr,
+ _("%s: invalid date '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
+ }
+ break;
+ case 'E':
+ Eflg = true;
+ expdate = strtoday (optarg);
+ if (expdate < -1) {
+ fprintf (stderr,
+ _("%s: invalid date '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
+ }
+ break;
+ case 'h':
+ usage (E_SUCCESS);
+ break;
+ case 'I':
+ Iflg = true;
+ if ( (getlong (optarg, &inactdays) == 0)
+ || (inactdays < -1)) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
+ }
+ break;
+ case 'l':
+ lflg = true;
+ break;
+ case 'm':
+ mflg = true;
+ if ( (getlong (optarg, &mindays) == 0)
+ || (mindays < -1)) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
+ }
+ break;
+ case 'M':
+ Mflg = true;
+ if ( (getlong (optarg, &maxdays) == 0)
+ || (maxdays < -1)) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
}
+ break;
+ case 'W':
+ Wflg = true;
+ if ( (getlong (optarg, &warndays) == 0)
+ || (warndays < -1)) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ usage (E_USAGE);
+ }
+ break;
+ default:
+ usage (E_USAGE);
}
}
+ check_flags (argc, optind);
+}
+
+/*
+ * check_flags - check flags and parameters consistency
+ *
+ * It will not return if an error is encountered.
+ */
+static void check_flags (int argc, int opt_index)
+{
/*
* Make certain the flags do not conflict and that there is a user
* name on the command line.
*/
- if (argc != optind + 1)
- usage ();
+ if (argc != opt_index + 1) {
+ usage (E_USAGE);
+ }
if (lflg && (mflg || Mflg || dflg || Wflg || Iflg || Eflg)) {
fprintf (stderr,
- _("%s: do not include \"l\" with other flags\n"),
- Prog);
- usage ();
+ _("%s: do not include \"l\" with other flags\n"),
+ Prog);
+ usage (E_USAGE);
}
+}
+
+/*
+ * check_perms - check if the caller is allowed to add a group
+ *
+ * Non-root users are only allowed to display their aging information.
+ * (we will later make sure that the user is only listing her aging
+ * information)
+ *
+ * With PAM support, the setuid bit can be set on chage 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;
+ struct passwd *pampw;
+ int retval;
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
/*
* An unprivileged user can ask for their own aging information, but
if (!amroot && !lflg) {
fprintf (stderr, _("%s: Permission denied.\n"), Prog);
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", NULL,
- getuid (), 0);
-#endif
- exit (E_NOPERM);
+ fail_exit (E_NOPERM);
}
- OPENLOG ("chage");
-
+#ifdef ACCT_TOOLS_SETUID
#ifdef USE_PAM
- retval = PAM_SUCCESS;
-
- {
- struct passwd *pampw;
- pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
- if (pampw == NULL) {
- retval = PAM_USER_UNKNOWN;
- }
-
- if (retval == PAM_SUCCESS) {
- retval = pam_start ("chage", pampw->pw_name,
- &conv, &pamh);
- }
+ pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+ if (NULL == pampw) {
+ fprintf (stderr,
+ _("%s: Cannot determine your user name.\n"),
+ Prog);
+ exit (E_NOPERM);
}
- if (retval == PAM_SUCCESS) {
+ retval = pam_start ("chage", pampw->pw_name, &conv, &pamh);
+
+ if (PAM_SUCCESS == retval) {
retval = pam_authenticate (pamh, 0);
- if (retval != PAM_SUCCESS) {
- pam_end (pamh, retval);
- }
}
- if (retval == PAM_SUCCESS) {
+ if (PAM_SUCCESS == retval) {
retval = pam_acct_mgmt (pamh, 0);
- if (retval != PAM_SUCCESS) {
- pam_end (pamh, retval);
- }
}
- if (retval != PAM_SUCCESS) {
+ if (NULL != pamh) {
+ (void) pam_end (pamh, retval);
+ }
+ if (PAM_SUCCESS != retval) {
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
- exit (E_NOPERM);
+ fail_exit (E_NOPERM);
}
#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+}
- /*
- * We use locks for read-write accesses only (locks implies amroot,
- * but amroot doesn't imply locks).
- */
- locks = !lflg;
-
+/*
+ * open_files - open the shadow database
+ *
+ * In read-only mode, the databases are not locked and are opened
+ * only for reading.
+ */
+static void open_files (bool readonly)
+{
/*
* Lock and open the password file. This loads all of the password
* file entries into memory. Then we get a pointer to the password
* file entry for the requested user.
*/
- if (!pw_open (O_RDONLY)) {
- fprintf (stderr, _("%s: can't open password file\n"), Prog);
- SYSLOG ((LOG_ERR, "failed opening %s", PASSWD_FILE));
- closelog ();
- exit (E_NOPERM);
- }
- if (!(pw = pw_locate (argv[optind]))) {
- fprintf (stderr, _("%s: unknown user %s\n"), Prog,
- argv[optind]);
- closelog ();
- exit (E_NOPERM);
+ if (!readonly) {
+ if (pw_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, pw_dbname ());
+ fail_exit (E_NOPERM);
+ }
+ pw_locked = true;
}
-
- pwent = *pw;
- STRFCPY (name, pwent.pw_name);
-
- if (!spw_file_present ()) {
- fprintf (stderr,
- _("%s: the shadow password file is not present\n"),
- Prog);
- SYSLOG ((LOG_ERR, "can't find the shadow password file"));
- closelog ();
- exit (E_SHADOW_NOTFOUND);
+ if (pw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", pw_dbname ()));
+ fail_exit (E_NOPERM);
}
/*
* does not have to exist in this case; a new entry will be created
* for this user if one does not exist already.
*/
- if (locks && !spw_lock ()) {
- fprintf (stderr,
- _("%s: can't lock shadow password file\n"), Prog);
- SYSLOG ((LOG_ERR, "failed locking %s", SHADOW_FILE));
- closelog ();
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
- getuid (), 0);
-#endif
- exit (E_NOPERM);
+ if (!readonly) {
+ if (spw_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, spw_dbname ());
+ fail_exit (E_NOPERM);
+ }
+ spw_locked = true;
}
- if (!spw_open (locks ? O_RDWR : O_RDONLY)) {
+ if (spw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
fprintf (stderr,
- _("%s: can't open shadow password file\n"), Prog);
- spw_unlock ();
- SYSLOG ((LOG_ERR, "failed opening %s", SHADOW_FILE));
- closelog ();
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
- getuid (), 0);
-#endif
- exit (E_NOPERM);
+ _("%s: cannot open %s\n"), Prog, spw_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", spw_dbname ()));
+ fail_exit (E_NOPERM);
}
+}
- if (lflg && (setregid (rgid, rgid) || setreuid (ruid, ruid))) {
- fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
- Prog, strerror (errno));
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age", name,
- getuid (), 0);
-#endif
- exit (E_NOPERM);
- }
-
- sp = spw_locate (argv[optind]);
-
+/*
+ * close_files - close and unlock the password/shadow databases
+ */
+static void close_files (void)
+{
/*
- * Set the fields that aren't being set from the command line from
- * the password file.
+ * Now close the shadow password file, which will cause all of the
+ * entries to be re-written.
*/
- if (sp) {
- spwd = *sp;
-
- if (!Mflg)
- maxdays = spwd.sp_max;
- if (!mflg)
- mindays = spwd.sp_min;
- if (!dflg)
- lastday = spwd.sp_lstchg;
- if (!Wflg)
- warndays = spwd.sp_warn;
- if (!Iflg)
- inactdays = spwd.sp_inact;
- if (!Eflg)
- expdays = spwd.sp_expire;
-#ifdef WITH_AUDIT
- if (Mflg)
-
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change max age", pw->pw_name, pw->pw_uid,
- 1);
- if (mflg)
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change min age", pw->pw_name, pw->pw_uid,
- 1);
- if (dflg) {
- char new_lastchg[200];
- char old_lastchg[200];
-
- date_to_str (new_lastchg, sizeof new_lastchg,
- lastday * DAY);
- date_to_str (old_lastchg, sizeof old_lastchg,
- spwd.sp_lstchg * DAY);
-
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change last change date", pw->pw_name,
- pw->pw_uid, 1);
- }
- if (Wflg)
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change passwd warning", pw->pw_name,
- pw->pw_uid, 1);
- if (Iflg)
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change inactive days", pw->pw_name,
- pw->pw_uid, 1);
- if (Eflg) {
- char new_exp[200];
- char old_exp[200];
-
- date_to_str (new_exp, sizeof new_exp, expdays * DAY);
- date_to_str (old_exp, sizeof old_exp,
- spwd.sp_expire * DAY);
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change passwd expiration", pw->pw_name,
- pw->pw_uid, 1);
- }
-#endif
+ 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 (E_NOPERM);
}
/*
- * Print out the expiration fields if the user has requested the
- * list option.
+ * Close the password file. If any entries were modified, the file
+ * will be re-written.
*/
-
- if (lflg) {
- if (!amroot && (ruid != pwent.pw_uid)) {
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, pw->pw_uid, 0);
-#endif
- fprintf (stderr, _("%s: Permission denied.\n"), Prog);
- closelog ();
- exit (E_NOPERM);
- }
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "display aging info",
- pw->pw_name, pw->pw_uid, 1);
-#endif
- list_fields ();
- spw_unlock ();
- closelog ();
- exit (E_SUCCESS);
+ if (pw_close () == 0) {
+ fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, pw_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
+ fail_exit (E_NOPERM);
}
-
- /*
- * If none of the fields were changed from the command line, let the
- * user interactively change them.
- */
- if (!mflg && !Mflg && !dflg && !Wflg && !Iflg && !Eflg) {
- printf (_("Changing the aging information for %s\n"), name);
- if (!new_fields ()) {
- fprintf (stderr, _("%s: error changing fields\n"),
- Prog);
- spw_unlock ();
- closelog ();
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, getuid (), 0);
-#endif
- exit (E_NOPERM);
- }
-#ifdef WITH_AUDIT
- else
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
- "change all aging information",
- pw->pw_name, getuid (), 1);
-#endif
+ 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 (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;
+}
+
+/*
+ * update_age - update the aging information in the database
+ *
+ * It will not return in case of error
+ */
+static void update_age (const struct spwd *sp, const struct passwd *pw)
+{
+ struct spwd spwent;
+
/*
* There was no shadow entry. The new entry will have the encrypted
* password transferred from the normal password file along with the
* aging information.
*/
- if (sp == 0) {
- sp = &spwd;
- memzero (&spwd, sizeof spwd);
+ if (NULL == sp) {
+ struct passwd pwent = *pw;
- spwd.sp_namp = xstrdup (pwent.pw_name);
- spwd.sp_pwdp = xstrdup (pwent.pw_passwd);
- spwd.sp_flag = -1;
+ memzero (&spwent, sizeof spwent);
+ spwent.sp_namp = xstrdup (pw->pw_name);
+ spwent.sp_pwdp = xstrdup (pw->pw_passwd);
+ spwent.sp_flag = SHADOW_SP_FLAG_UNSET;
pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
- if (!pw_update (&pwent)) {
+ if (pw_update (&pwent) == 0) {
fprintf (stderr,
- _("%s: can't update password file\n"), Prog);
- spw_unlock ();
- SYSLOG ((LOG_ERR, "failed updating %s", PASSWD_FILE));
- closelog ();
-#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, getuid (), 0);
-#endif
- exit (E_NOPERM);
+ _("%s: failed to prepare the new %s entry '%s'\n"), Prog, pw_dbname (), pwent.pw_name);
+ fail_exit (E_NOPERM);
}
+ } else {
+ spwent.sp_namp = xstrdup (sp->sp_namp);
+ spwent.sp_pwdp = xstrdup (sp->sp_pwdp);
+ spwent.sp_flag = sp->sp_flag;
}
/*
* modified entry back to the shadow file. Closing the shadow and
* password files will commit any changes that have been made.
*/
- spwd.sp_max = maxdays;
- spwd.sp_min = mindays;
- spwd.sp_lstchg = lastday;
- spwd.sp_warn = warndays;
- spwd.sp_inact = inactdays;
- spwd.sp_expire = expdays;
-
- if (!spw_update (&spwd)) {
+ spwent.sp_max = maxdays;
+ spwent.sp_min = mindays;
+ spwent.sp_lstchg = lstchgdate;
+ spwent.sp_warn = warndays;
+ spwent.sp_inact = inactdays;
+ spwent.sp_expire = expdate;
+
+ if (spw_update (&spwent) == 0) {
fprintf (stderr,
- _("%s: can't update shadow password file\n"), Prog);
- spw_unlock ();
- SYSLOG ((LOG_ERR, "failed updating %s", SHADOW_FILE));
- closelog ();
+ _("%s: failed to prepare the new %s entry '%s'\n"), Prog, spw_dbname (), spwent.sp_namp);
+ fail_exit (E_NOPERM);
+ }
+
+}
+
+/*
+ * get_defaults - get the value of the fields not set from the command line
+ */
+static void get_defaults (const struct spwd *sp)
+{
+ /*
+ * Set the fields that aren't being set from the command line from
+ * the password file.
+ */
+ if (NULL != sp) {
+ if (!Mflg) {
+ maxdays = sp->sp_max;
+ }
+ if (!mflg) {
+ mindays = sp->sp_min;
+ }
+ if (!dflg) {
+ lstchgdate = sp->sp_lstchg;
+ }
+ if (!Wflg) {
+ warndays = sp->sp_warn;
+ }
+ if (!Iflg) {
+ inactdays = sp->sp_inact;
+ }
+ if (!Eflg) {
+ expdate = sp->sp_expire;
+ }
+ } else {
+ /*
+ * Use default values that will not change the behavior of the
+ * account.
+ */
+ if (!Mflg) {
+ maxdays = -1;
+ }
+ if (!mflg) {
+ mindays = -1;
+ }
+ if (!dflg) {
+ lstchgdate = -1;
+ }
+ if (!Wflg) {
+ warndays = -1;
+ }
+ if (!Iflg) {
+ inactdays = -1;
+ }
+ if (!Eflg) {
+ expdate = -1;
+ }
+ }
+}
+
+/*
+ * chage - change a user's password aging information
+ *
+ * This command controls the password aging information.
+ *
+ * The valid options are
+ *
+ * -d set last password change date (*)
+ * -E set account expiration date (*)
+ * -I set password inactive after expiration (*)
+ * -l show account aging information
+ * -M set maximim number of days before password change (*)
+ * -m set minimum number of days before password change (*)
+ * -W set expiration warning days (*)
+ *
+ * (*) requires root permission to execute.
+ *
+ * All of the time fields are entered in the internal format which is
+ * either seconds or days.
+ */
+
+int main (int argc, char **argv)
+{
+ const struct spwd *sp;
+ uid_t ruid;
+ gid_t rgid;
+ const struct passwd *pw;
+
#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, getuid (), 0);
+ audit_help_open ();
#endif
- exit (E_NOPERM);
+ sanitize_env ();
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ ruid = getuid ();
+ rgid = getgid ();
+ amroot = (ruid == 0);
+#ifdef WITH_SELINUX
+ if (amroot && (is_selinux_enabled () > 0)) {
+ amroot = (selinux_check_passwd_access (PASSWD__ROOTOK) == 0);
}
+#endif
/*
- * Now close the shadow password file, which will cause all of the
- * entries to be re-written.
+ * Get the program name so that error messages can use it.
*/
- if (!spw_close ()) {
+ Prog = Basename (argv[0]);
+
+ process_flags (argc, argv);
+
+ OPENLOG ("chage");
+
+ check_perms ();
+
+ if (!spw_file_present ()) {
fprintf (stderr,
- _("%s: can't rewrite shadow password file\n"), Prog);
- spw_unlock ();
- SYSLOG ((LOG_ERR, "failed rewriting %s", SHADOW_FILE));
+ _("%s: the shadow password file is not present\n"),
+ Prog);
+ SYSLOG ((LOG_WARN, "can't find the shadow password file"));
closelog ();
+ exit (E_SHADOW_NOTFOUND);
+ }
+
+ open_files (lflg);
+ /* Drop privileges */
+ if (lflg && ( (setregid (rgid, rgid) != 0)
+ || (setreuid (ruid, ruid) != 0))) {
+ fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
+ Prog, strerror (errno));
+ fail_exit (E_NOPERM);
+ }
+
+ pw = pw_locate (argv[optind]);
+ if (NULL == pw) {
+ fprintf (stderr, _("%s: user '%s' does not exist in %s\n"),
+ Prog, argv[optind], pw_dbname ());
+ closelog ();
+ fail_exit (E_NOPERM);
+ }
+
+ STRFCPY (user_name, pw->pw_name);
+#ifdef WITH_TCB
+ if (shadowtcb_set_user (pw->pw_name) == SHADOWTCB_FAILURE) {
+ fail_exit (E_NOPERM);
+ }
+#endif
+ user_uid = pw->pw_uid;
+
+ sp = spw_locate (argv[optind]);
+ get_defaults (sp);
+
+ /*
+ * Print out the expiration fields if the user has requested the
+ * list option.
+ */
+ if (lflg) {
+ if (!amroot && (ruid != user_uid)) {
+ fprintf (stderr, _("%s: Permission denied.\n"), Prog);
+ fail_exit (E_NOPERM);
+ }
#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, getuid (), 0);
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "display aging info",
+ user_name, (unsigned int) user_uid, 1);
#endif
- exit (E_NOPERM);
+ list_fields ();
+ fail_exit (E_SUCCESS);
}
/*
- * Close the password file. If any entries were modified, the file
- * will be re-written.
+ * If none of the fields were changed from the command line, let the
+ * user interactively change them.
*/
- if (!pw_close ()) {
- fprintf (stderr, _("%s: can't rewrite password file\n"), Prog);
- spw_unlock ();
- SYSLOG ((LOG_ERR, "failed rewriting %s", PASSWD_FILE));
- closelog ();
+ if (!mflg && !Mflg && !dflg && !Wflg && !Iflg && !Eflg) {
+ printf (_("Changing the aging information for %s\n"),
+ user_name);
+ if (new_fields () == 0) {
+ fprintf (stderr, _("%s: error changing fields\n"),
+ Prog);
+ fail_exit (E_NOPERM);
+ }
#ifdef WITH_AUDIT
- audit_logger (AUDIT_USER_CHAUTHTOK, Prog, "change age",
- pw->pw_name, getuid (), 0);
+ else {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change all aging information",
+ user_name, (unsigned int) user_uid, 1);
+ }
+#endif
+ } else {
+#ifdef WITH_AUDIT
+ if (Mflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change max age",
+ user_name, (unsigned int) user_uid, 1);
+ }
+ if (mflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change min age",
+ user_name, (unsigned int) user_uid, 1);
+ }
+ if (dflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change last change date",
+ user_name, (unsigned int) user_uid, 1);
+ }
+ if (Wflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change passwd warning",
+ user_name, (unsigned int) user_uid, 1);
+ }
+ if (Iflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change inactive days",
+ user_name, (unsigned int) user_uid, 1);
+ }
+ if (Eflg) {
+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
+ "change passwd expiration",
+ user_name, (unsigned int) user_uid, 1);
+ }
#endif
- exit (E_NOPERM);
}
- spw_unlock ();
- SYSLOG ((LOG_INFO, "changed password expiry for %s", name));
-#ifdef USE_PAM
- if (retval == PAM_SUCCESS)
- pam_end (pamh, PAM_SUCCESS);
-#endif /* USE_PAM */
+ update_age (sp, pw);
+
+ close_files ();
+
+ SYSLOG ((LOG_INFO, "changed password expiry for %s", user_name));
closelog ();
exit (E_SUCCESS);
}
+
projects / shadow / blobdiff