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132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*----------------------------------------------------------------------
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* Mini who is used to display user name, login time,
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* idle time and host name.
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*
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* Author: Da Chen <dchen@ayrnetworks.com>
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*
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* This is a free document; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation:
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* http://www.gnu.org/copyleft/gpl.html
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*
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* Copyright (c) 2002 AYR Networks, Inc.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*
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*----------------------------------------------------------------------
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*/
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//config:config WHO
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//config: bool "who"
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//config: default y
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//config: depends on FEATURE_UTMP
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//config: help
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//config: who is used to show who is logged on.
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//config:
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//config:config USERS
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//config: bool "users"
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//config: default y
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//config: depends on FEATURE_UTMP
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//config: help
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//config: Print users currently logged on.
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//applet:IF_USERS(APPLET_ODDNAME(users, who, BB_DIR_USR_BIN, BB_SUID_DROP, users))
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//applet:IF_WHO(APPLET(who, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_USERS) += who.o
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//kbuild:lib-$(CONFIG_WHO) += who.o
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/* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */
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//usage:#define users_trivial_usage
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//usage: ""
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//usage:#define users_full_usage "\n\n"
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//usage: "Print the users currently logged on"
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//usage:#define who_trivial_usage
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//usage: "[-a]"
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//usage:#define who_full_usage "\n\n"
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//usage: "Show who is logged on\n"
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//usage: "\n -a Show all"
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//usage: "\n -H Print column headers"
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#include "libbb.h"
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static void idle_string(char *str6, time_t t)
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{
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t = time(NULL) - t;
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/*if (t < 60) {
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str6[0] = '.';
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str6[1] = '\0';
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return;
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}*/
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if (t >= 0 && t < (24 * 60 * 60)) {
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sprintf(str6, "%02d:%02d",
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(int) (t / (60 * 60)),
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(int) ((t % (60 * 60)) / 60));
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return;
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}
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strcpy(str6, "old");
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}
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int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int who_main(int argc UNUSED_PARAM, char **argv)
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{
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struct utmpx *ut;
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unsigned opt;
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int do_users = (ENABLE_USERS && (!ENABLE_WHO || applet_name[0] == 'u'));
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const char *fmt = "%s";
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opt_complementary = "=0";
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opt = getopt32(argv, do_users ? "" : "aH");
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if (opt & 2) // -H
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puts("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST");
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setutxent();
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while ((ut = getutxent()) != NULL) {
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if (ut->ut_user[0]
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&& ((opt & 1) || ut->ut_type == USER_PROCESS)
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) {
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if (!do_users) {
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char str6[6];
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char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1];
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struct stat st;
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time_t seconds;
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str6[0] = '?';
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str6[1] = '\0';
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strcpy(name, "/dev/");
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safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1,
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ut->ut_line,
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sizeof(ut->ut_line)+1
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);
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if (stat(name, &st) == 0)
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idle_string(str6, st.st_atime);
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/* manpages say ut_tv.tv_sec *is* time_t,
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* but some systems have it wrong */
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seconds = ut->ut_tv.tv_sec;
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/* How wide time field can be?
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* "Nov 10 19:33:20": 15 chars
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* "2010-11-10 19:33": 16 chars
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*/
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printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n",
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(int)sizeof(ut->ut_user), ut->ut_user,
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(int)sizeof(ut->ut_line), ut->ut_line,
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str6,
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ctime(&seconds) + 4,
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(int)sizeof(ut->ut_host), ut->ut_host
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);
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} else {
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printf(fmt, ut->ut_user);
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fmt = " %s";
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}
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}
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}
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if (do_users)
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bb_putchar('\n');
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if (ENABLE_FEATURE_CLEAN_UP)
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endutxent();
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return EXIT_SUCCESS;
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}
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