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.
11 #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 defined UT_LINESIZE \
30 && ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
31 #error struct utmp member char[] size(s) have changed!
32 #elif defined __UT_LINESIZE \
33 && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 64) || (__UT_HOSTSIZE != 256))
34 #error struct utmp member char[] size(s) have changed!
37 int last_main(int argc, char **argv)
40 int n, file = STDIN_FILENO;
46 file = bb_xopen(bb_path_wtmp_file, O_RDONLY);
48 printf("%-10s %-14s %-18s %-12.12s %s\n", "USER", "TTY", "HOST", "LOGIN", "TIME");
49 while ((n = safe_read(file, (void*)&ut, sizeof(struct utmp))) != 0) {
51 if (n != sizeof(struct utmp)) {
52 bb_perror_msg_and_die("short read");
55 if (strncmp(ut.ut_line, "~", 1) == 0) {
56 if (strncmp(ut.ut_user, "shutdown", 8) == 0)
57 ut.ut_type = SHUTDOWN_TIME;
58 else if (strncmp(ut.ut_user, "reboot", 6) == 0)
59 ut.ut_type = BOOT_TIME;
60 else if (strncmp(ut.ut_user, "runlevel", 7) == 0)
63 if (!ut.ut_name[0] || strcmp(ut.ut_name, "LOGIN") == 0 ||
66 /* Don't bother. This means we can't find how long
67 * someone was logged in for. Oh well. */
70 if (ut.ut_type != DEAD_PROCESS &&
71 ut.ut_name[0] && ut.ut_line[0])
73 ut.ut_type = USER_PROCESS;
75 if (strcmp(ut.ut_name, "date") == 0) {
76 if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME;
77 if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME;
81 if (ut.ut_type!=USER_PROCESS) {
89 strcpy(ut.ut_line, "system boot");
93 t_tmp = (time_t)ut.ut_tv.tv_sec;
94 printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host,
98 bb_fflush_stdout_and_exit(EXIT_SUCCESS);