mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
2ec91aead5
function old new delta whoami_main 34 37 +3 logname_main 60 63 +3 hostid_main 35 38 +3 ttysize_main 136 135 -1 nmeter_main 673 672 -1 logger_main 387 386 -1 uuencode_main 330 328 -2 ifupdown_main 2125 2123 -2 mesg_main 158 155 -3 free_main 333 330 -3 cal_main 902 899 -3 acpid_main 443 440 -3 ar_main 196 189 -7 find_main 476 467 -9 ifconfig_main 1235 1221 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/12 up/down: 9/-49) Total: -40 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* last implementation for busybox
|
|
*
|
|
* Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under the GPL version 2, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
#include <utmp.h>
|
|
|
|
/* NB: ut_name and ut_user are the same field, use only one name (ut_user)
|
|
* to reduce confusion */
|
|
|
|
#ifndef SHUTDOWN_TIME
|
|
# define SHUTDOWN_TIME 254
|
|
#endif
|
|
|
|
/* Grr... utmp char[] members do not have to be nul-terminated.
|
|
* Do what we can while still keeping this reasonably small.
|
|
* Note: We are assuming the ut_id[] size is fixed at 4. */
|
|
|
|
#if defined UT_LINESIZE \
|
|
&& ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
|
|
#error struct utmp member char[] size(s) have changed!
|
|
#elif defined __UT_LINESIZE \
|
|
&& ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 64) || (__UT_HOSTSIZE != 256))
|
|
#error struct utmp member char[] size(s) have changed!
|
|
#endif
|
|
|
|
#if EMPTY != 0 || RUN_LVL != 1 || BOOT_TIME != 2 || NEW_TIME != 3 || \
|
|
OLD_TIME != 4
|
|
#error Values for the ut_type field of struct utmp changed
|
|
#endif
|
|
|
|
int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
|
|
{
|
|
struct utmp ut;
|
|
int n, file = STDIN_FILENO;
|
|
time_t t_tmp;
|
|
off_t pos;
|
|
static const char _ut_usr[] ALIGN1 =
|
|
"runlevel\0" "reboot\0" "shutdown\0";
|
|
static const char _ut_lin[] ALIGN1 =
|
|
"~\0" "{\0" "|\0" /* "LOGIN\0" "date\0" */;
|
|
enum {
|
|
TYPE_RUN_LVL = RUN_LVL, /* 1 */
|
|
TYPE_BOOT_TIME = BOOT_TIME, /* 2 */
|
|
TYPE_SHUTDOWN_TIME = SHUTDOWN_TIME
|
|
};
|
|
enum {
|
|
_TILDE = EMPTY, /* 0 */
|
|
TYPE_NEW_TIME, /* NEW_TIME, 3 */
|
|
TYPE_OLD_TIME /* OLD_TIME, 4 */
|
|
};
|
|
|
|
if (argv[1]) {
|
|
bb_show_usage();
|
|
}
|
|
file = xopen(bb_path_wtmp_file, O_RDONLY);
|
|
|
|
printf("%-10s %-14s %-18s %-12.12s %s\n",
|
|
"USER", "TTY", "HOST", "LOGIN", "TIME");
|
|
/* yikes. We reverse over the file and that is a not too elegant way */
|
|
pos = xlseek(file, 0, SEEK_END);
|
|
pos = lseek(file, pos - sizeof(ut), SEEK_SET);
|
|
while ((n = full_read(file, &ut, sizeof(ut))) > 0) {
|
|
if (n != sizeof(ut)) {
|
|
bb_perror_msg_and_die("short read");
|
|
}
|
|
n = index_in_strings(_ut_lin, ut.ut_line);
|
|
if (n == _TILDE) { /* '~' */
|
|
#if 1
|
|
/* do we really need to be cautious here? */
|
|
n = index_in_strings(_ut_usr, ut.ut_user);
|
|
if (++n > 0)
|
|
ut.ut_type = n != 3 ? n : SHUTDOWN_TIME;
|
|
#else
|
|
if (strncmp(ut.ut_user, "shutdown", 8) == 0)
|
|
ut.ut_type = SHUTDOWN_TIME;
|
|
else if (strncmp(ut.ut_user, "reboot", 6) == 0)
|
|
ut.ut_type = BOOT_TIME;
|
|
else if (strncmp(ut.ut_user, "runlevel", 8) == 0)
|
|
ut.ut_type = RUN_LVL;
|
|
#endif
|
|
} else {
|
|
if (ut.ut_user[0] == '\0' || strcmp(ut.ut_user, "LOGIN") == 0) {
|
|
/* Don't bother. This means we can't find how long
|
|
* someone was logged in for. Oh well. */
|
|
goto next;
|
|
}
|
|
if (ut.ut_type != DEAD_PROCESS
|
|
&& ut.ut_user[0] && ut.ut_line[0]
|
|
) {
|
|
ut.ut_type = USER_PROCESS;
|
|
}
|
|
if (strcmp(ut.ut_user, "date") == 0) {
|
|
if (n == TYPE_OLD_TIME) { /* '|' */
|
|
ut.ut_type = OLD_TIME;
|
|
}
|
|
if (n == TYPE_NEW_TIME) { /* '{' */
|
|
ut.ut_type = NEW_TIME;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ut.ut_type != USER_PROCESS) {
|
|
switch (ut.ut_type) {
|
|
case OLD_TIME:
|
|
case NEW_TIME:
|
|
case RUN_LVL:
|
|
case SHUTDOWN_TIME:
|
|
goto next;
|
|
case BOOT_TIME:
|
|
strcpy(ut.ut_line, "system boot");
|
|
}
|
|
}
|
|
/* manpages say ut_tv.tv_sec *is* time_t,
|
|
* but some systems have it wrong */
|
|
t_tmp = (time_t)ut.ut_tv.tv_sec;
|
|
printf("%-10s %-14s %-18s %-12.12s\n",
|
|
ut.ut_user, ut.ut_line, ut.ut_host, ctime(&t_tmp) + 4);
|
|
next:
|
|
pos -= sizeof(ut);
|
|
if (pos <= 0)
|
|
break; /* done. */
|
|
xlseek(file, pos, SEEK_SET);
|
|
}
|
|
|
|
fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|