Contents of /trunk/mkinitrd-magellan/busybox/miscutils/last.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 2429 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * last implementation for busybox |
4 | * |
5 | * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under the GPL version 2, see the file LICENSE in this tarball. |
8 | */ |
9 | |
10 | #include "busybox.h" |
11 | #include <utmp.h> |
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 | |
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! |
27 | #endif |
28 | |
29 | int last_main(int argc, char **argv) |
30 | { |
31 | struct utmp ut; |
32 | int n, file = STDIN_FILENO; |
33 | time_t t_tmp; |
34 | |
35 | if (argc > 1) { |
36 | bb_show_usage(); |
37 | } |
38 | file = xopen(bb_path_wtmp_file, O_RDONLY); |
39 | |
40 | printf("%-10s %-14s %-18s %-12.12s %s\n", "USER", "TTY", "HOST", "LOGIN", "TIME"); |
41 | while ((n = safe_read(file, (void*)&ut, sizeof(struct utmp))) != 0) { |
42 | |
43 | if (n != sizeof(struct utmp)) { |
44 | bb_perror_msg_and_die("short read"); |
45 | } |
46 | |
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", 7) == 0) |
53 | ut.ut_type = RUN_LVL; |
54 | } else { |
55 | if (!ut.ut_name[0] || strcmp(ut.ut_name, "LOGIN") == 0 || |
56 | ut.ut_name[0] == 0) |
57 | { |
58 | /* Don't bother. This means we can't find how long |
59 | * someone was logged in for. Oh well. */ |
60 | continue; |
61 | } |
62 | if (ut.ut_type != DEAD_PROCESS && |
63 | ut.ut_name[0] && ut.ut_line[0]) |
64 | { |
65 | ut.ut_type = USER_PROCESS; |
66 | } |
67 | if (strcmp(ut.ut_name, "date") == 0) { |
68 | if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME; |
69 | if (ut.ut_line[0] == '{') ut.ut_type = NEW_TIME; |
70 | } |
71 | } |
72 | |
73 | if (ut.ut_type!=USER_PROCESS) { |
74 | switch (ut.ut_type) { |
75 | case OLD_TIME: |
76 | case NEW_TIME: |
77 | case RUN_LVL: |
78 | case SHUTDOWN_TIME: |
79 | continue; |
80 | case BOOT_TIME: |
81 | strcpy(ut.ut_line, "system boot"); |
82 | break; |
83 | } |
84 | } |
85 | t_tmp = (time_t)ut.ut_tv.tv_sec; |
86 | printf("%-10s %-14s %-18s %-12.12s\n", ut.ut_user, ut.ut_line, ut.ut_host, |
87 | ctime(&t_tmp) + 4); |
88 | } |
89 | |
90 | fflush_stdout_and_exit(EXIT_SUCCESS); |
91 | } |