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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 19:33:32 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 19:33:32 +0000 |
commit | 8bb05ac73a5b448b339ce0bc8d396c82c459b47f (patch) | |
tree | 1fdda006866bca20d41cb206767ea5241e36852f /misc-utils/lastlog2.c | |
parent | Adding debian version 2.39.3-11. (diff) | |
download | util-linux-8bb05ac73a5b448b339ce0bc8d396c82c459b47f.tar.xz util-linux-8bb05ac73a5b448b339ce0bc8d396c82c459b47f.zip |
Merging upstream version 2.40.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | misc-utils/lastlog2.c | 309 |
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); +} |