source: branches/2.2.2/mindi-busybox/coreutils/who.c @ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.6 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*----------------------------------------------------------------------
3 * Mini who is used to display user name, login time,
4 * idle time and host name.
5 *
6 * Author: Da Chen  <dchen@ayrnetworks.com>
7 *
8 * This is a free document; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation:
11 *    http://www.gnu.org/copyleft/gpl.html
12 *
13 * Copyright (c) 2002 AYR Networks, Inc.
14 *----------------------------------------------------------------------
15 */
16
17#include "busybox.h"
18#include <utmp.h>
19#include <time.h>
20
21static const char * idle_string (time_t t)
22{
23    static char str[6];
24   
25    time_t s = time(NULL) - t;
26
27    if (s < 60)
28        return ".";
29    if (s < (24 * 60 * 60)) {
30        sprintf (str, "%02d:%02d",
31                (int) (s / (60 * 60)),
32                (int) ((s % (60 * 60)) / 60));
33        return str;
34    }
35    return "old";
36}
37
38int who_main(int argc, char **argv)
39{
40    struct utmp *ut;
41    struct stat st;
42    char *name;
43   
44    if (argc > 1) {
45        bb_show_usage();
46    }
47   
48    setutent();
49    printf("USER       TTY      IDLE      TIME           HOST\n");
50    while ((ut = getutent()) != NULL) {
51        if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
52            time_t thyme = ut->ut_tv.tv_sec;
53
54            /* ut->ut_line is device name of tty - "/dev/" */
55            name = concat_path_file("/dev", ut->ut_line);
56            printf("%-10s %-8s %-8s  %-12.12s   %s\n", ut->ut_user, ut->ut_line,
57                                    (stat(name, &st)) ?  "?" : idle_string(st.st_atime),
58                                    ctime(&thyme) + 4, ut->ut_host);
59            if (ENABLE_FEATURE_CLEAN_UP) free(name);
60        }
61    }
62    if (ENABLE_FEATURE_CLEAN_UP) endutent();
63    return 0;
64}
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