1 /* vi: set sw=4 ts=4: */
3 * last implementation for busybox
5 * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
14 # define SHUTDOWN_TIME 254
17 /* Grr... utmp char[] members do not have to be nul-terminated.
18 * Do what we can while still keeping this reasonably small.
19 * Note: We are assuming the ut_id[] size is fixed at 4. */
21 #if defined UT_LINESIZE \
22 && ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
23 #error struct utmp member char[] size(s) have changed!
24 #elif defined __UT_LINESIZE \
25 && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 64) || (__UT_HOSTSIZE != 256))
26 #error struct utmp member char[] size(s) have changed!
29 int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
30 int last_main(int argc, char **argv ATTRIBUTE_UNUSED)
33 int n, file = STDIN_FILENO;
39 file = xopen(bb_path_wtmp_file, O_RDONLY);
41 printf("%-10s %-14s %-18s %-12.12s %s\n", "USER", "TTY", "HOST", "LOGIN", "TIME");
42 while ((n = full_read(file, &ut, sizeof(ut))) > 0) {
43 if (n != sizeof(ut)) {
44 bb_perror_msg_and_die("short read");
47 if (ut.ut_line[0] == '~') {
48 if (strncmp(ut.ut_user, "shutdown", 8) == 0)
49 ut.ut_type = SHUTDOWN_TIME;
50 else if (strncmp(ut.ut_user, "reboot", 6) == 0)
51 ut.ut_type = BOOT_TIME;
52 else if (strncmp(ut.ut_user, "runlevel", 8) == 0)
55 if (ut.ut_name[0] == '\0' || strcmp(ut.ut_name, "LOGIN") == 0) {
56 /* Don't bother. This means we can't find how long
57 * someone was logged in for. Oh well. */
60 if (ut.ut_type != DEAD_PROCESS
61 && ut.ut_name[0] && ut.ut_line[0]
63 ut.ut_type = USER_PROCESS;
65 if (strcmp(ut.ut_name, "date") == 0) {
66 if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME;
67 if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME;
71 if (ut.ut_type != USER_PROCESS) {
79 strcpy(ut.ut_line, "system boot");
83 t_tmp = (time_t)ut.ut_tv.tv_sec;
84 printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host,
88 fflush_stdout_and_exit(EXIT_SUCCESS);