[821] | 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 | */
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| 16 |
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| 17 | #include "busybox.h"
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| 18 | #include <utmp.h>
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| 19 | #include <time.h>
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| 20 |
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| 21 | static const char * idle_string (time_t t)
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| 22 | {
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| 23 | static char str[6];
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| 24 |
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| 25 | time_t s = time(NULL) - t;
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| 26 |
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| 27 | if (s < 60)
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| 28 | return ".";
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| 29 | if (s < (24 * 60 * 60)) {
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| 30 | sprintf (str, "%02d:%02d",
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| 31 | (int) (s / (60 * 60)),
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| 32 | (int) ((s % (60 * 60)) / 60));
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| 33 | return str;
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| 34 | }
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| 35 | return "old";
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| 36 | }
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| 37 |
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| 38 | int who_main(int argc, char **argv)
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| 39 | {
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| 40 | struct utmp *ut;
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| 41 | struct stat st;
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| 42 | char *name;
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| 43 |
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| 44 | if (argc > 1) {
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| 45 | bb_show_usage();
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| 46 | }
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| 47 |
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| 48 | setutent();
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| 49 | printf("USER TTY IDLE TIME HOST\n");
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| 50 | while ((ut = getutent()) != NULL) {
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| 51 | if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
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| 52 | time_t thyme = ut->ut_tv.tv_sec;
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| 53 |
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| 54 | /* ut->ut_line is device name of tty - "/dev/" */
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| 55 | name = concat_path_file("/dev", ut->ut_line);
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| 56 | printf("%-10s %-8s %-8s %-12.12s %s\n", ut->ut_user, ut->ut_line,
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| 57 | (stat(name, &st)) ? "?" : idle_string(st.st_atime),
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| 58 | ctime(&thyme) + 4, ut->ut_host);
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| 59 | if (ENABLE_FEATURE_CLEAN_UP) free(name);
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| 60 | }
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| 61 | }
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| 62 | if (ENABLE_FEATURE_CLEAN_UP) endutent();
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| 63 | return 0;
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| 64 | }
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