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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