summaryrefslogtreecommitdiffstats
path: root/src/chage.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/chage.c')
-rw-r--r--src/chage.c948
1 files changed, 948 insertions, 0 deletions
diff --git a/src/chage.c b/src/chage.c
new file mode 100644
index 0000000..617e90f
--- /dev/null
+++ b/src/chage.c
@@ -0,0 +1,948 @@
+/*
+ * 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
+ * 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.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdio.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 "prototypes.h"
+#include "defines.h"
+#include "pwio.h"
+#include "shadowio.h"
+#ifdef WITH_TCB
+#include "tcbfuncs.h"
+#endif
+/*@-exitarg@*/
+#include "exitcodes.h"
+
+/*
+ * Global variables
+ */
+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 lstchgdate;
+static long warndays;
+static long inactdays;
+static long expdate;
+
+/* local function prototypes */
+static /*@noreturn@*/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 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 /*@noreturn@*/void fail_exit (int code);
+
+/*
+ * fail_exit - do some cleanup and exit with the given error code
+ */
+static /*@noreturn@*/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 */
+ }
+ }
+ 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 /*@noreturn@*/void usage (int status)
+{
+ FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+ (void) fprintf (usageout,
+ _("Usage: %s [options] LOGIN\n"
+ "\n"
+ "Options:\n"),
+ Prog);
+ (void) fputs (_(" -d, --lastday LAST_DAY set date of last password change to LAST_DAY\n"), usageout);
+ (void) fputs (_(" -E, --expiredate EXPIRE_DATE set account expiration date to EXPIRE_DATE\n"), usageout);
+ (void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
+ (void) fputs (_(" -I, --inactive INACTIVE set password inactive after expiration\n"
+ " to INACTIVE\n"), usageout);
+ (void) fputs (_(" -l, --list show account aging information\n"), usageout);
+ (void) fputs (_(" -m, --mindays MIN_DAYS set minimum number of days before password\n"
+ " change to MIN_DAYS\n"), usageout);
+ (void) fputs (_(" -M, --maxdays MAX_DAYS set maximim number of days before password\n"
+ " change to MAX_DAYS\n"), usageout);
+ (void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout);
+ (void) fputs (_(" -W, --warndays WARN_DAYS set expiration warning days to WARN_DAYS\n"), usageout);
+ (void) fputs ("\n", usageout);
+ exit (status);
+}
+
+static void date_to_str (char *buf, size_t maxsize, time_t date)
+{
+ struct tm *tp;
+
+ tp = gmtime (&date);
+#ifdef HAVE_STRFTIME
+ (void) strftime (buf, maxsize, "%Y-%m-%d", tp);
+#else
+ (void) snprintf (buf, maxsize, "%04d-%02d-%02d",
+ tp->tm_year + 1900, tp->tm_mon + 1, tp->tm_mday);
+#endif /* HAVE_STRFTIME */
+}
+
+/*
+ * new_fields - change the user's password aging information interactively.
+ *
+ * prompt the user for all of the password age values. set the fields
+ * from the user's response, or leave alone if nothing was entered. The
+ * value (-1) is used to indicate the field should be removed if possible.
+ * any other negative value is an error. very large positive values will
+ * be handled elsewhere.
+ */
+static int new_fields (void)
+{
+ char buf[200];
+
+ (void) puts (_("Enter the new value, or press ENTER for the default"));
+ (void) puts ("");
+
+ (void) snprintf (buf, sizeof buf, "%ld", mindays);
+ change_field (buf, sizeof buf, _("Minimum Password Age"));
+ if ( (getlong (buf, &mindays) == 0)
+ || (mindays < -1)) {
+ return 0;
+ }
+
+ (void) snprintf (buf, sizeof buf, "%ld", maxdays);
+ change_field (buf, sizeof buf, _("Maximum Password Age"));
+ if ( (getlong (buf, &maxdays) == 0)
+ || (maxdays < -1)) {
+ return 0;
+ }
+
+ if (-1 == lstchgdate) {
+ strcpy (buf, "-1");
+ } else {
+ date_to_str (buf, sizeof buf, (time_t) lstchgdate * SCALE);
+ }
+
+ change_field (buf, sizeof buf, _("Last Password Change (YYYY-MM-DD)"));
+
+ if (strcmp (buf, "-1") == 0) {
+ lstchgdate = -1;
+ } else {
+ lstchgdate = strtoday (buf);
+ if (lstchgdate <= -1) {
+ return 0;
+ }
+ }
+
+ (void) snprintf (buf, sizeof buf, "%ld", warndays);
+ change_field (buf, sizeof buf, _("Password Expiration Warning"));
+ if ( (getlong (buf, &warndays) == 0)
+ || (warndays < -1)) {
+ return 0;
+ }
+
+ (void) snprintf (buf, sizeof buf, "%ld", inactdays);
+ change_field (buf, sizeof buf, _("Password Inactive"));
+ if ( (getlong (buf, &inactdays) == 0)
+ || (inactdays < -1)) {
+ return 0;
+ }
+
+ if (-1 == expdate) {
+ strcpy (buf, "-1");
+ } else {
+ date_to_str (buf, sizeof buf, (time_t) expdate * SCALE);
+ }
+
+ change_field (buf, sizeof buf,
+ _("Account Expiration Date (YYYY-MM-DD)"));
+
+ if (strcmp (buf, "-1") == 0) {
+ expdate = -1;
+ } else {
+ expdate = strtoday (buf);
+ if (expdate <= -1) {
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static void print_date (time_t date)
+{
+#ifdef HAVE_STRFTIME
+ struct tm *tp;
+ char buf[80];
+
+ tp = gmtime (&date);
+ if (NULL == tp) {
+ (void) printf ("time_t: %lu\n", (unsigned long)date);
+ } else {
+ (void) strftime (buf, sizeof buf, "%b %d, %Y", tp);
+ (void) puts (buf);
+ }
+#else
+ struct tm *tp;
+ char *cp = NULL;
+
+ tp = gmtime (&date);
+ 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
+}
+
+/*
+ * list_fields - display the current values of the expiration fields
+ *
+ * display the password age information from the password fields. Date
+ * values will be displayed as a calendar date, or the word "never" if
+ * the date is 1/1/70, which is day number 0.
+ */
+static void list_fields (void)
+{
+ long changed = 0;
+ long expires;
+
+ /*
+ * 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.
+ */
+ (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 = 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.
+ */
+ (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 ((time_t) expires);
+ }
+
+ /*
+ * The account becomes inactive if the password is expired for more
+ * than "inactdays". The expiration date is calculated and the
+ * number of inactive days is added. The resulting date is when the
+ * active will be disabled.
+ */
+ (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 ((time_t) expires);
+ }
+
+ /*
+ * The account will expire on the given date regardless of the
+ * password expiring or not.
+ */
+ (void) fputs (_("Account expires\t\t\t\t\t\t: "), stdout);
+ if (expdate < 0) {
+ (void) puts (_("never"));
+ } else {
+ expires = expdate * SCALE;
+ print_date ((time_t) expires);
+ }
+
+ /*
+ * Start with the easy numbers - the number of days before the
+ * password can be changed, the number of days after which the
+ * password must be chaged, the number of days before the password
+ * expires that the user is told, and the number of days after the
+ * password expires that the account becomes unusable.
+ */
+ printf (_("Minimum number of days between password change\t\t: %ld\n"),
+ mindays);
+ printf (_("Maximum number of days between password change\t\t: %ld\n"),
+ maxdays);
+ printf (_("Number of days of warning before password expires\t: %ld\n"),
+ warndays);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ * It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+ /*
+ * Parse the command line options.
+ */
+ 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'},
+ {"root", required_argument, NULL, 'R'},
+ {"warndays", required_argument, NULL, 'W'},
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((c = getopt_long (argc, argv, "d:E:hI:lm:M:R:W:",
+ long_options, NULL)) != -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);
+ /*@notreached@*/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 'R': /* no-op, handled in process_root_flag () */
+ 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 != 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 (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
+ * only root can change it, or list another user's aging
+ * information.
+ */
+
+ if (!amroot && !lflg) {
+ fprintf (stderr, _("%s: Permission denied.\n"), Prog);
+ fail_exit (E_NOPERM);
+ }
+
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+ pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+ if (NULL == pampw) {
+ fprintf (stderr,
+ _("%s: Cannot determine your user name.\n"),
+ Prog);
+ exit (E_NOPERM);
+ }
+
+ retval = pam_start ("chage", 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 (E_NOPERM);
+ }
+ (void) pam_end (pamh, retval);
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+}
+
+/*
+ * 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 (!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;
+ }
+ if (pw_open (readonly ? O_RDONLY: O_CREAT | 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);
+ }
+
+ /*
+ * For shadow password files we have to lock the file and read in
+ * the entries as was done for the password file. The user entries
+ * does not have to exist in this case; a new entry will be created
+ * for this user if one does not exist already.
+ */
+ 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 (readonly ? O_RDONLY: O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"), Prog, spw_dbname ());
+ SYSLOG ((LOG_WARN, "cannot open %s", spw_dbname ()));
+ fail_exit (E_NOPERM);
+ }
+}
+
+/*
+ * close_files - close and unlock the password/shadow databases
+ */
+static void close_files (void)
+{
+ /*
+ * Now close the shadow password file, which will cause all of the
+ * entries to be re-written.
+ */
+ 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);
+ }
+
+ /*
+ * Close the password file. If any entries were modified, the file
+ * will be re-written.
+ */
+ 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 (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 (/*@null@*/const struct spwd *sp,
+ /*@notnull@*/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 (NULL == sp) {
+ struct passwd pwent = *pw;
+
+ memzero (&spwent, sizeof spwent);
+ spwent.sp_namp = xstrdup (pwent.pw_name);
+ spwent.sp_pwdp = xstrdup (pwent.pw_passwd);
+ spwent.sp_flag = SHADOW_SP_FLAG_UNSET;
+
+ pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
+ if (pw_update (&pwent) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare the new %s entry '%s'\n"), Prog, pw_dbname (), pwent.pw_name);
+ fail_exit (E_NOPERM);
+ }
+ } else {
+ spwent.sp_namp = xstrdup (sp->sp_namp);
+ spwent.sp_pwdp = xstrdup (sp->sp_pwdp);
+ spwent.sp_flag = sp->sp_flag;
+ }
+
+ /*
+ * Copy the fields back to the shadow file entry and write the
+ * modified entry back to the shadow file. Closing the shadow and
+ * password files will commit any changes that have been made.
+ */
+ 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: 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 (/*@null@*/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;
+
+ /*
+ * Get the program name so that error messages can use it.
+ */
+ Prog = Basename (argv[0]);
+
+ sanitize_env ();
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ process_root_flag ("-R", argc, argv);
+
+#ifdef WITH_AUDIT
+ audit_help_open ();
+#endif
+ OPENLOG ("chage");
+
+ 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
+
+ process_flags (argc, argv);
+
+ check_perms ();
+
+ if (!spw_file_present ()) {
+ fprintf (stderr,
+ _("%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,
+ "display aging info",
+ user_name, (unsigned int) user_uid, 1);
+#endif
+ list_fields ();
+ fail_exit (E_SUCCESS);
+ }
+
+ /*
+ * 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"),
+ user_name);
+ if (new_fields () == 0) {
+ fprintf (stderr, _("%s: error changing fields\n"),
+ Prog);
+ fail_exit (E_NOPERM);
+ }
+#ifdef WITH_AUDIT
+ 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
+ }
+
+ update_age (sp, pw);
+
+ close_files ();
+
+ SYSLOG ((LOG_INFO, "changed password expiry for %s", user_name));
+
+ closelog ();
+ exit (E_SUCCESS);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 11:57:33 +0000