93 lines
2.4 KiB
C
93 lines
2.4 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>
|
|
|
|
#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
|
|
|
|
int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int last_main(int argc, char **argv)
|
|
{
|
|
struct utmp ut;
|
|
int n, file = STDIN_FILENO;
|
|
time_t t_tmp;
|
|
|
|
if (argc > 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");
|
|
while ((n = safe_read(file, (void*)&ut, sizeof(struct utmp))) != 0) {
|
|
|
|
if (n != sizeof(struct utmp)) {
|
|
bb_perror_msg_and_die("short read");
|
|
}
|
|
|
|
if (ut.ut_line[0] == '~') {
|
|
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", 7) == 0)
|
|
ut.ut_type = RUN_LVL;
|
|
} else {
|
|
if (!ut.ut_name[0] || strcmp(ut.ut_name, "LOGIN") == 0 ||
|
|
ut.ut_name[0] == 0)
|
|
{
|
|
/* Don't bother. This means we can't find how long
|
|
* someone was logged in for. Oh well. */
|
|
continue;
|
|
}
|
|
if (ut.ut_type != DEAD_PROCESS &&
|
|
ut.ut_name[0] && ut.ut_line[0])
|
|
{
|
|
ut.ut_type = USER_PROCESS;
|
|
}
|
|
if (strcmp(ut.ut_name, "date") == 0) {
|
|
if (ut.ut_line[0] == '|') ut.ut_type = OLD_TIME;
|
|
if (ut.ut_line[0] == '{') 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:
|
|
continue;
|
|
case BOOT_TIME:
|
|
strcpy(ut.ut_line, "system boot");
|
|
break;
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
|
|
fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|