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 v2 or later, see the file LICENSE in this tarball.
10 #include <sys/types.h>
22 # define SHUTDOWN_TIME 254
25 /* Grr... utmp char[] members do not have to be nul-terminated.
26 * Do what we can while still keeping this reasonably small.
27 * Note: We are assuming the ut_id[] size is fixed at 4. */
29 #if (UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256)
30 #error struct utmp member char[] size(s) have changed!
33 int last_main(int argc, char **argv)
36 int n, file = STDIN_FILENO;
42 file = bb_xopen(_PATH_WTMP, O_RDONLY);
44 printf("%-10s %-14s %-18s %-12.12s %s\n", "USER", "TTY", "HOST", "LOGIN", "TIME");
45 while ((n = safe_read(file, (void*)&ut, sizeof(struct utmp))) != 0) {
47 if (n != sizeof(struct utmp)) {
48 bb_perror_msg_and_die("short read");
51 if (strncmp(ut.ut_line, "~", 1) == 0) {
52 if (strncmp(ut.ut_user, "shutdown", 8) == 0)
53 ut.ut_type = SHUTDOWN_TIME;
54 else if (strncmp(ut.ut_user, "reboot", 6) == 0)
55 ut.ut_type = BOOT_TIME;
56 else if (strncmp(ut.ut_user, "runlevel", 7) == 0)
59 if (!ut.ut_name[0] || strcmp(ut.ut_name, "LOGIN") == 0 ||
62 /* Don't bother. This means we can't find how long
63 * someone was logged in for. Oh well. */
66 if (ut.ut_type != DEAD_PROCESS &&
67 ut.ut_name[0] && ut.ut_line[0])
69 ut.ut_type = USER_PROCESS;
71 if (strcmp(ut.ut_name, "date") == 0) {
72 if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME;
73 if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME;
77 if (ut.ut_type!=USER_PROCESS) {
85 strcpy(ut.ut_line, "system boot");
89 t_tmp = (time_t)ut.ut_tv.tv_sec;
90 printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host,
94 bb_fflush_stdout_and_exit(EXIT_SUCCESS);