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-rw-r--r--misc-utils/lastlog2.c309
1 files changed, 309 insertions, 0 deletions
diff --git a/misc-utils/lastlog2.c b/misc-utils/lastlog2.c
new file mode 100644
index 0000000..4029f5e
--- /dev/null
+++ b/misc-utils/lastlog2.c
@@ -0,0 +1,309 @@
+/* SPDX-License-Identifier: BSD-2-Clause
+
+ Copyright (c) 2023, Thorsten Kukuk <kukuk@suse.com>
+
+ 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.
+
+ 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 HOLDER 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 <pwd.h>
+#include <time.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <limits.h>
+
+#include "nls.h"
+#include "c.h"
+#include "strutils.h"
+#include "lastlog2.h"
+
+static char *lastlog2_path = LL2_DEFAULT_DATABASE;
+
+static int bflg;
+static time_t b_days;
+static int tflg;
+static time_t t_days;
+static int sflg;
+
+static int print_entry(const char *user, int64_t ll_time,
+ const char *tty, const char *rhost,
+ const char *pam_service, const char *error)
+{
+ static int once = 0;
+ char *datep;
+ struct tm *tm, tm_buf;
+ char datetime[80];
+ /* IPv6 address is at maximum 39 characters.
+ But for LL-addresses (fe80+only) the interface should be set,
+ so LL-address + % + IFNAMSIZ. */
+ const int maxIPv6Addrlen = 42;
+
+ /* Print only if older than b days */
+ if (bflg && ((time (NULL) - ll_time) < b_days))
+ return 0;
+
+ /* Print only if newer than t days */
+ if (tflg && ((time (NULL) - ll_time) > t_days))
+ return 0;
+ /* this is necessary if you compile this on architectures with
+ a 32bit time_t type. */
+ time_t t_time = ll_time;
+ tm = localtime_r(&t_time, &tm_buf);
+ if (tm == NULL)
+ datep = "(unknown)";
+ else {
+ strftime(datetime, sizeof(datetime), "%a %b %e %H:%M:%S %z %Y", tm);
+ datep = datetime;
+ }
+
+ if (ll_time == 0)
+ datep = "**Never logged in**";
+
+ if (!once) {
+ printf("Username Port From%*s Latest%*s%s\n",
+ maxIPv6Addrlen - 4, " ",
+ sflg ? (int) strlen(datep) -5 : 0,
+ " ", sflg ? "Service" : "");
+ once = 1;
+ }
+ printf("%-16s %-8.8s %*s %s%*s%s\n", user, tty ? tty : "",
+ -maxIPv6Addrlen, rhost ? rhost : "", datep,
+ sflg ? 31 - (int) strlen(datep) : 0,
+ (sflg && pam_service) ? " " : "",
+ sflg ? (pam_service ? pam_service : "") : "");
+
+ if (error)
+ printf("\nError: %s\n", error);
+
+ return 0;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *output = stdout;
+
+ fputs(USAGE_HEADER, output);
+ fprintf(output, _(" %s [options]\n"), program_invocation_short_name);
+
+ fputs(USAGE_OPTIONS, output);
+ fputs(_(" -b, --before DAYS Print only records older than DAYS\n"), output);
+ fputs(_(" -C, --clear Clear record of a user (requires -u)\n"), output);
+ fputs(_(" -d, --database FILE Use FILE as lastlog2 database\n"), output);
+ fputs(_(" -i, --import FILE Import data from old lastlog file\n"), output);
+ fputs(_(" -r, --rename NEWNAME Rename existing user to NEWNAME (requires -u)\n"), output);
+ fputs(_(" -s, --service Display PAM service\n"), output);
+ fputs(_(" -S, --set ySet lastlog record to current time (requires -u)\n"), output);
+ fputs(_(" -t, --time DAYS Print only lastlog records more recent than DAYS\n"), output);
+ fputs(_(" -u, --user LOGIN Print lastlog record of the specified LOGIN\n"), output);
+
+ fputs(USAGE_SEPARATOR, output);
+ fprintf(output, USAGE_HELP_OPTIONS(25));
+ fprintf(output, USAGE_MAN_TAIL("lastlog2(8)"));
+
+ exit(EXIT_SUCCESS);
+}
+
+/* Check if an user exists on the system */
+#define has_user(_x) (getpwnam(_x) != NULL)
+
+int main(int argc, char **argv)
+{
+ static const struct option longopts[] = {
+ {"before", required_argument, NULL, 'b'},
+ {"clear", no_argument, NULL, 'C'},
+ {"database", required_argument, NULL, 'd'},
+ {"help", no_argument, NULL, 'h'},
+ {"import", required_argument, NULL, 'i'},
+ {"rename", required_argument, NULL, 'r'},
+ {"service", no_argument, NULL, 's'},
+ {"set", no_argument, NULL, 'S'},
+ {"time", required_argument, NULL, 't'},
+ {"user", required_argument, NULL, 'u'},
+ {"version", no_argument, NULL, 'v'},
+ {NULL, 0, NULL, '\0'}
+ };
+ char *error = NULL;
+ int Cflg = 0;
+ int iflg = 0;
+ int rflg = 0;
+ int Sflg = 0;
+ int uflg = 0;
+ const char *user = NULL;
+ const char *newname = NULL;
+ const char *lastlog_file = NULL;
+ struct ll2_context *db_context = NULL;
+
+ int c;
+
+ while ((c = getopt_long(argc, argv, "b:Cd:hi:r:sSt:u:v", longopts, NULL)) != -1) {
+ switch (c) {
+ case 'b': /* before DAYS; Print only records older than DAYS */
+ {
+ unsigned long days;
+ errno = 0;
+ days = strtoul_or_err(optarg, _("Cannot parse days"));
+ b_days = (time_t) days * (24L * 3600L) /* seconds/DAY */;
+ bflg = 1;
+ }
+ break;
+ case 'C': /* clear; Clear record of a user (requires -u) */
+ Cflg = 1;
+ break;
+ case 'd': /* database <FILE>; Use FILE as lastlog2 database */
+ lastlog2_path = optarg;
+ break;
+ case 'h': /* help; Display this help message and exit */
+ usage();
+ break;
+ case 'i': /* import <FILE>; Import data from old lastlog file */
+ lastlog_file = optarg;
+ iflg = 1;
+ break;
+ case 'r': /* rename <NEWNAME>; Rename existing user to NEWNAME (requires -u) */
+ rflg = 1;
+ newname = optarg;
+ break;
+ case 's': /* service; Display PAM service */
+ sflg = 1;
+ break;
+ case 'S': /* set; Set lastlog record to current time (requires -u) */
+ /* Set lastlog record of a user to the current time. */
+ Sflg = 1;
+ break;
+ case 't': /* time <DAYS>; Print only lastlog records more recent than DAYS */
+ {
+ unsigned long days;
+ errno = 0;
+ days = strtoul_or_err(optarg, _("Cannot parse days"));
+ t_days = (time_t) days * (24L * 3600L) /* seconds/DAY */;
+ tflg = 1;
+ }
+ break;
+ case 'u': /* user <LOGIN>; Print lastlog record of the specified LOGIN */
+ uflg = 1;
+ user = optarg;
+ break;
+ case 'v': /* version; Print version number and exit */
+ print_version(EXIT_SUCCESS);
+ break;
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if ((Cflg + Sflg + iflg) > 1)
+ errx(EXIT_FAILURE, _("Option -C, -i and -S cannot be used together"));
+
+ db_context = ll2_new_context(lastlog2_path);
+ if (!db_context)
+ errx(EXIT_FAILURE, _("Couldn't initialize lastlog2 environment"));
+
+ if (iflg) {
+ /* Importing entries */
+ if (ll2_import_lastlog(db_context, lastlog_file, &error) != 0) {
+ warnx(_("Couldn't import entries from '%s'"), lastlog_file);
+ goto err;
+ }
+ goto done;
+ }
+
+ if (Cflg || Sflg || rflg) {
+ /* udpating, inserting and removing entries */
+ if (!uflg || strlen(user) == 0) {
+ warnx(_("Options -C, -r and -S require option -u to specify the user"));
+ goto err;
+ }
+
+ if ((Cflg || Sflg) && !has_user(user)) {
+ warnx(_("User '%s' does not exist."), user);
+ goto err;
+ }
+
+ if (Cflg) {
+ if (ll2_remove_entry(db_context, user, &error) != 0) {
+ warnx(_("Couldn't remove entry for '%s'"), user);
+ goto err;
+ }
+ }
+
+ if (Sflg) {
+ time_t ll_time = 0;
+
+ if (time(&ll_time) == -1) {
+ warn(_("Could not determine current time"));
+ goto err;
+ }
+
+ if (ll2_update_login_time(db_context, user, ll_time, &error) != 0) {
+ warnx(_("Couldn't update login time for '%s'"), user);
+ goto err;
+ }
+ }
+
+ if (rflg) {
+ if (ll2_rename_user(db_context, user, newname, &error) != 0) {
+ warnx(_("Couldn't rename entry '%s' to '%s'"), user, newname);
+ goto err;
+ }
+ }
+
+ goto done;
+ }
+
+ if (user) {
+ /* print user specific information */
+ int64_t ll_time = 0;
+ char *tty = NULL;
+ char *rhost = NULL;
+ char *service = NULL;
+
+ if (!has_user(user)) {
+ warnx(_("User '%s' does not exist."), user);
+ goto err;
+ }
+
+ /* We ignore errors, if the user is not in the database he did never login */
+ ll2_read_entry(db_context, user, &ll_time, &tty, &rhost,
+ &service, NULL);
+
+ print_entry(user, ll_time, tty, rhost, service, NULL);
+ goto done;
+ }
+
+ /* print all information */
+ if (ll2_read_all(db_context, print_entry, &error) != 0) {
+ warnx(_("Couldn't read entries for all users"));
+ goto err;
+ }
+
+done:
+ ll2_unref_context(db_context);
+ exit(EXIT_SUCCESS);
+err:
+ ll2_unref_context(db_context);
+ if (error)
+ errx(EXIT_FAILURE, "%s", error);
+ exit(EXIT_FAILURE);
+}
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