| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*----------------------------------------------------------------------
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| 3 | * Mini who is used to display user name, login time,
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| 4 | * idle time and host name.
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| 5 | *
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| 6 | * Author: Da Chen <dchen@ayrnetworks.com>
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| 7 | *
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| 8 | * This is a free document; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License
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| 10 | * as published by the Free Software Foundation:
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| 11 | * http://www.gnu.org/copyleft/gpl.html
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| 12 | *
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| 13 | * Copyright (c) 2002 AYR Networks, Inc.
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| 14 | *
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| 15 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 16 | *
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| 17 | *----------------------------------------------------------------------
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| 18 | */
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| 19 |
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| 20 | #include "libbb.h"
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| 21 | #include <utmp.h>
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| 22 | #include <time.h>
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| 23 |
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| 24 | static void idle_string(char *str6, time_t t)
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| 25 | {
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| 26 | t = time(NULL) - t;
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| 27 |
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| 28 | /*if (t < 60) {
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| 29 | str6[0] = '.';
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| 30 | str6[1] = '\0';
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| 31 | return;
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| 32 | }*/
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| 33 | if (t >= 0 && t < (24 * 60 * 60)) {
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| 34 | sprintf(str6, "%02d:%02d",
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| 35 | (int) (t / (60 * 60)),
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| 36 | (int) ((t % (60 * 60)) / 60));
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| 37 | return;
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| 38 | }
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| 39 | strcpy(str6, "old");
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| 40 | }
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| 41 |
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| 42 | int who_main(int argc, char **argv);
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| 43 | int who_main(int argc, char **argv)
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| 44 | {
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| 45 | char str6[6];
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| 46 | struct utmp *ut;
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| 47 | struct stat st;
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| 48 | char *name;
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| 49 |
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| 50 | if (argc > 1) {
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| 51 | bb_show_usage();
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| 52 | }
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| 53 |
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| 54 | setutent();
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| 55 | printf("USER TTY IDLE TIME HOST\n");
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| 56 | while ((ut = getutent()) != NULL) {
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| 57 | if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
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| 58 | time_t thyme = ut->ut_tv.tv_sec;
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| 59 |
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| 60 | /* ut->ut_line is device name of tty - "/dev/" */
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| 61 | name = concat_path_file("/dev", ut->ut_line);
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| 62 | str6[0] = '?';
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| 63 | str6[1] = '\0';
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| 64 | if (stat(name, &st) == 0)
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| 65 | idle_string(str6, st.st_atime);
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| 66 | printf("%-10s %-8s %-9s %-14.14s %s\n",
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| 67 | ut->ut_user, ut->ut_line, str6,
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| 68 | ctime(&thyme) + 4, ut->ut_host);
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| 69 | if (ENABLE_FEATURE_CLEAN_UP)
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| 70 | free(name);
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| 71 | }
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| 72 | }
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| 73 | if (ENABLE_FEATURE_CLEAN_UP)
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| 74 | endutent();
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| 75 | return 0;
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| 76 | }
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