| /* vi: set sw=4 ts=4: */ |
| /*---------------------------------------------------------------------- |
| * Mini who is used to display user name, login time, |
| * idle time and host name. |
| * |
| * Author: Da Chen <dchen@ayrnetworks.com> |
| * |
| * This is a free document; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation: |
| * http://www.gnu.org/copyleft/gpl.html |
| * |
| * Copyright (c) 2002 AYR Networks, Inc. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| * |
| *---------------------------------------------------------------------- |
| */ |
| //config:config WHO |
| //config: bool "who" |
| //config: default y |
| //config: depends on FEATURE_UTMP |
| //config: help |
| //config: who is used to show who is logged on. |
| //config: |
| // procps-ng has this variation of "who": |
| //config:config W |
| //config: bool "w" |
| //config: default y |
| //config: depends on FEATURE_UTMP |
| //config: help |
| //config: w is used to show who is logged on. |
| //config: |
| //config:config USERS |
| //config: bool "users" |
| //config: default y |
| //config: depends on FEATURE_UTMP |
| //config: help |
| //config: Print users currently logged on. |
| |
| // APPLET_ODDNAME:name main location suid_type help |
| //applet:IF_USERS(APPLET_ODDNAME(users, who, BB_DIR_USR_BIN, BB_SUID_DROP, users)) |
| //applet:IF_W( APPLET_ODDNAME(w, who, BB_DIR_USR_BIN, BB_SUID_DROP, w)) |
| //applet:IF_WHO( APPLET( who, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_USERS) += who.o |
| //kbuild:lib-$(CONFIG_W) += who.o |
| //kbuild:lib-$(CONFIG_WHO) += who.o |
| |
| /* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */ |
| |
| //usage:#define users_trivial_usage |
| //usage: "" |
| //usage:#define users_full_usage "\n\n" |
| //usage: "Print the users currently logged on" |
| |
| //usage:#define w_trivial_usage |
| //usage: "" |
| //usage:#define w_full_usage "\n\n" |
| //usage: "Show who is logged on" |
| // |
| // procps-ng 3.3.10: |
| // "\n -h, --no-header" |
| // "\n -u, --no-current" |
| // Ignores the username while figuring out the current process |
| // and cpu times. To demonstrate this, do a "su" and do a "w" and a "w -u". |
| // "\n -s, --short" |
| // Short format. Don't print the login time, JCPU or PCPU times. |
| // "\n -f, --from" |
| // Toggle printing the from (remote hostname) field. |
| // The default is for the from field to not be printed |
| // "\n -i, --ip-addr" |
| // Display IP address instead of hostname for from field. |
| // "\n -o, --old-style" |
| // Old style output. Prints blank space for idle times less than one minute. |
| // Example output: |
| // 17:28:00 up 4 days, 22:41, 4 users, load average: 0.84, 0.97, 0.90 |
| // USER TTY LOGIN@ IDLE JCPU PCPU WHAT |
| // root tty1 Thu18 4days 4:33m 0.07s /bin/sh /etc/xdg/xfce4/xinitrc -- vt |
| // root pts/1 Mon13 3:24m 1:01 0.01s w |
| |
| //usage:#define who_trivial_usage |
| //usage: "[-a]" |
| //usage:#define who_full_usage "\n\n" |
| //usage: "Show who is logged on\n" |
| //usage: "\n -a Show all" |
| //usage: "\n -H Print column headers" |
| |
| #include "libbb.h" |
| |
| static void idle_string(char *str6, time_t t) |
| { |
| t = time(NULL) - t; |
| |
| /*if (t < 60) { |
| str6[0] = '.'; |
| str6[1] = '\0'; |
| return; |
| }*/ |
| if (t >= 0 && t < (24 * 60 * 60)) { |
| sprintf(str6, "%02d:%02d", |
| (int) (t / (60 * 60)), |
| (int) ((t % (60 * 60)) / 60)); |
| return; |
| } |
| strcpy(str6, "old"); |
| } |
| |
| int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int who_main(int argc UNUSED_PARAM, char **argv) |
| { |
| #define CNT_APPLET (ENABLE_USERS + ENABLE_W + ENABLE_WHO) |
| int do_users = (ENABLE_USERS && (CNT_APPLET == 1 || applet_name[0] == 'u')); |
| int do_w = (ENABLE_W && (CNT_APPLET == 1 || applet_name[1] == '\0')); |
| int do_who = (ENABLE_WHO && (CNT_APPLET == 1 || applet_name[1] == 'h')); |
| struct utmpx *ut; |
| unsigned opt; |
| const char *fmt = "%s"; |
| |
| opt_complementary = "=0"; |
| opt = getopt32(argv, do_who ? "aH" : ""); |
| if ((opt & 2) || do_w) /* -H or we are w */ |
| puts("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST"); |
| |
| setutxent(); |
| while ((ut = getutxent()) != NULL) { |
| if (ut->ut_user[0] |
| && ((opt & 1) || ut->ut_type == USER_PROCESS) |
| ) { |
| if (!do_users) { |
| char str6[6]; |
| char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1]; |
| struct stat st; |
| time_t seconds; |
| |
| str6[0] = '?'; |
| str6[1] = '\0'; |
| strcpy(name, "/dev/"); |
| safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1, |
| ut->ut_line, |
| sizeof(ut->ut_line)+1 |
| ); |
| if (stat(name, &st) == 0) |
| idle_string(str6, st.st_atime); |
| /* manpages say ut_tv.tv_sec *is* time_t, |
| * but some systems have it wrong */ |
| seconds = ut->ut_tv.tv_sec; |
| /* How wide time field can be? |
| * "Nov 10 19:33:20": 15 chars |
| * "2010-11-10 19:33": 16 chars |
| */ |
| printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n", |
| (int)sizeof(ut->ut_user), ut->ut_user, |
| (int)sizeof(ut->ut_line), ut->ut_line, |
| str6, |
| // TODO: with LANG=en_US.UTF-8, who from coreutils 8.25 shows |
| // TIME col as "2017-04-06 18:47" (the default format is "Apr 6 18:47"). |
| // The former format looks saner to me. Switch to it unconditionally? |
| ctime(&seconds) + 4, |
| (int)sizeof(ut->ut_host), ut->ut_host |
| ); |
| } else { |
| printf(fmt, ut->ut_user); |
| fmt = " %s"; |
| } |
| } |
| } |
| if (do_users) |
| bb_putchar('\n'); |
| if (ENABLE_FEATURE_CLEAN_UP) |
| endutxent(); |
| return EXIT_SUCCESS; |
| } |