1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* 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 tarball for details.
*
*----------------------------------------------------------------------
*/
#include "busybox.h"
#include <utmp.h>
#include <time.h>
static const char * idle_string (time_t t)
{
static char str[6];
time_t s = time(NULL) - t;
if (s < 60)
return ".";
if (s < (24 * 60 * 60)) {
sprintf(str, "%02d:%02d",
(int) (s / (60 * 60)),
(int) ((s % (60 * 60)) / 60));
return str;
}
return "old";
}
int who_main(int argc, char **argv);
int who_main(int argc, char **argv)
{
struct utmp *ut;
struct stat st;
char *name;
if (argc > 1) {
bb_show_usage();
}
setutent();
printf("USER TTY IDLE TIME HOST\n");
while ((ut = getutent()) != NULL) {
if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
time_t thyme = ut->ut_tv.tv_sec;
/* ut->ut_line is device name of tty - "/dev/" */
name = concat_path_file("/dev", ut->ut_line);
printf("%-10s %-8s %-8s %-12.12s %s\n", ut->ut_user, ut->ut_line,
(stat(name, &st)) ? "?" : idle_string(st.st_atime),
ctime(&thyme) + 4, ut->ut_host);
if (ENABLE_FEATURE_CLEAN_UP) free(name);
}
}
if (ENABLE_FEATURE_CLEAN_UP) endutent();
return 0;
}
|
