Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * last implementation for busybox |
| 4 | * |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 5 | * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org> |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 6 | * |
Rob Landley | e9a7a62 | 2006-09-22 02:52:41 +0000 | [diff] [blame] | 7 | * Licensed under the GPL version 2, see the file LICENSE in this tarball. |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 10 | #include "libbb.h" |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 11 | #include <utmp.h> |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 12 | |
| 13 | #ifndef SHUTDOWN_TIME |
| 14 | # define SHUTDOWN_TIME 254 |
| 15 | #endif |
| 16 | |
| 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. */ |
| 20 | |
Bernhard Reutner-Fischer | 781e42d | 2006-05-26 14:41:40 +0000 | [diff] [blame] | 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)) |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 26 | #error struct utmp member char[] size(s) have changed! |
| 27 | #endif |
| 28 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 29 | int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 30 | int last_main(int argc, char **argv ATTRIBUTE_UNUSED) |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 31 | { |
| 32 | struct utmp ut; |
| 33 | int n, file = STDIN_FILENO; |
"Vladimir N. Oleynik" | dd14ca0 | 2006-01-31 09:35:45 +0000 | [diff] [blame] | 34 | time_t t_tmp; |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 35 | |
| 36 | if (argc > 1) { |
| 37 | bb_show_usage(); |
| 38 | } |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 39 | file = xopen(bb_path_wtmp_file, O_RDONLY); |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 40 | |
| 41 | printf("%-10s %-14s %-18s %-12.12s %s\n", "USER", "TTY", "HOST", "LOGIN", "TIME"); |
| 42 | while ((n = safe_read(file, (void*)&ut, sizeof(struct utmp))) != 0) { |
| 43 | |
| 44 | if (n != sizeof(struct utmp)) { |
| 45 | bb_perror_msg_and_die("short read"); |
| 46 | } |
| 47 | |
Denis Vlasenko | bf66fbc | 2006-12-21 13:23:14 +0000 | [diff] [blame] | 48 | if (ut.ut_line[0] == '~') { |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 49 | if (strncmp(ut.ut_user, "shutdown", 8) == 0) |
| 50 | ut.ut_type = SHUTDOWN_TIME; |
| 51 | else if (strncmp(ut.ut_user, "reboot", 6) == 0) |
| 52 | ut.ut_type = BOOT_TIME; |
| 53 | else if (strncmp(ut.ut_user, "runlevel", 7) == 0) |
| 54 | ut.ut_type = RUN_LVL; |
| 55 | } else { |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 56 | if (!ut.ut_name[0] || strcmp(ut.ut_name, "LOGIN") == 0 || |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 57 | ut.ut_name[0] == 0) |
| 58 | { |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 59 | /* Don't bother. This means we can't find how long |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 60 | * someone was logged in for. Oh well. */ |
| 61 | continue; |
| 62 | } |
| 63 | if (ut.ut_type != DEAD_PROCESS && |
| 64 | ut.ut_name[0] && ut.ut_line[0]) |
| 65 | { |
| 66 | ut.ut_type = USER_PROCESS; |
| 67 | } |
| 68 | if (strcmp(ut.ut_name, "date") == 0) { |
| 69 | if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME; |
| 70 | if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | if (ut.ut_type!=USER_PROCESS) { |
| 75 | switch (ut.ut_type) { |
| 76 | case OLD_TIME: |
| 77 | case NEW_TIME: |
| 78 | case RUN_LVL: |
| 79 | case SHUTDOWN_TIME: |
| 80 | continue; |
| 81 | case BOOT_TIME: |
| 82 | strcpy(ut.ut_line, "system boot"); |
| 83 | break; |
| 84 | } |
| 85 | } |
"Vladimir N. Oleynik" | dd14ca0 | 2006-01-31 09:35:45 +0000 | [diff] [blame] | 86 | t_tmp = (time_t)ut.ut_tv.tv_sec; |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 87 | printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host, |
"Vladimir N. Oleynik" | dd14ca0 | 2006-01-31 09:35:45 +0000 | [diff] [blame] | 88 | ctime(&t_tmp) + 4); |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 89 | } |
| 90 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 91 | fflush_stdout_and_exit(EXIT_SUCCESS); |
Eric Andersen | 2e9c257 | 2003-08-08 22:26:06 +0000 | [diff] [blame] | 92 | } |