diff options
Diffstat (limited to 'miscutils/last.c')
| -rw-r--r-- | miscutils/last.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/miscutils/last.c b/miscutils/last.c deleted file mode 100644 index b3f125c..0000000 --- a/miscutils/last.c +++ /dev/null @@ -1,166 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * last implementation for busybox - * - * Copyright (C) 2003-2004 by Erik Andersen <andersen@codepoet.org> - * - * Licensed under GPLv2, see file LICENSE in this source tree. - */ -//config:config LAST -//config: bool "last" -//config: default y -//config: depends on FEATURE_WTMP -//config: help -//config: 'last' displays a list of the last users that logged into the system. -//config: -//config:config FEATURE_LAST_FANCY -//config: bool "Output extra information" -//config: default y -//config: depends on LAST -//config: help -//config: 'last' displays detailed information about the last users that -//config: logged into the system (mimics sysvinit last). +900 bytes. - -//applet:IF_LAST(APPLET(last, BB_DIR_USR_BIN, BB_SUID_DROP)) - -//kbuild:ifeq ($(CONFIG_FEATURE_LAST_FANCY),y) -//kbuild:lib-$(CONFIG_FEATURE_LAST_FANCY) += last_fancy.o -//kbuild:else -//kbuild:lib-$(CONFIG_LAST) += last.o -//kbuild:endif - -//usage:#define last_trivial_usage -//usage: ""IF_FEATURE_LAST_FANCY("[-HW] [-f FILE]") -//usage:#define last_full_usage "\n\n" -//usage: "Show listing of the last users that logged into the system" -//usage: IF_FEATURE_LAST_FANCY( "\n" -/* //usage: "\n -H Show header line" */ -//usage: "\n -W Display with no host column truncation" -//usage: "\n -f FILE Read from FILE instead of /var/log/wtmp" -//usage: ) - -#include "libbb.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 utmpx member char[] size(s) have changed! -#elif defined __UT_LINESIZE \ - && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 32) || (__UT_HOSTSIZE != 256)) -/* __UT_NAMESIZE was checked with 64 above, but glibc-2.11 definitely uses 32! */ -#error struct utmpx 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 utmpx changed -#endif - -int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) -{ - struct utmpx 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 (is_prefixed_with(ut.ut_user, "shutdown")) - ut.ut_type = SHUTDOWN_TIME; - else if (is_prefixed_with(ut.ut_user, "reboot")) - ut.ut_type = BOOT_TIME; - else if (is_prefixed_with(ut.ut_user, "runlevel")) - 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); -} |