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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/* 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 source tree.
*
*----------------------------------------------------------------------
*/
//config:config WHO
//config: bool "who"
//config: default y
//config: depends on FEATURE_UTMP
//config: help
//config: who is used to show who is logged on.
//config:
//config:config USERS
//config: bool "users"
//config: default y
//config: depends on FEATURE_UTMP
//config: help
//config: Print users currently logged on.
// APPLET_ODDNAME:name main location suid_type help
//applet:IF_USERS(APPLET_ODDNAME(users, who, BB_DIR_USR_BIN, BB_SUID_DROP, users))
//applet:IF_WHO(APPLET(who, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_USERS) += who.o
//kbuild:lib-$(CONFIG_WHO) += who.o
/* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */
//usage:#define users_trivial_usage
//usage: ""
//usage:#define users_full_usage "\n\n"
//usage: "Print the users currently logged on"
//usage:#define who_trivial_usage
//usage: "[-a]"
//usage:#define who_full_usage "\n\n"
//usage: "Show who is logged on\n"
//usage: "\n -a Show all"
//usage: "\n -H Print column headers"
#include "libbb.h"
static void idle_string(char *str6, time_t t)
{
t = time(NULL) - t;
/*if (t < 60) {
str6[0] = '.';
str6[1] = '\0';
return;
}*/
if (t >= 0 && t < (24 * 60 * 60)) {
sprintf(str6, "%02d:%02d",
(int) (t / (60 * 60)),
(int) ((t % (60 * 60)) / 60));
return;
}
strcpy(str6, "old");
}
int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int who_main(int argc UNUSED_PARAM, char **argv)
{
struct utmpx *ut;
unsigned opt;
int do_users = (ENABLE_USERS && (!ENABLE_WHO || applet_name[0] == 'u'));
const char *fmt = "%s";
opt_complementary = "=0";
opt = getopt32(argv, do_users ? "" : "aH");
if (opt & 2) // -H
puts("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST");
setutxent();
while ((ut = getutxent()) != NULL) {
if (ut->ut_user[0]
&& ((opt & 1) || ut->ut_type == USER_PROCESS)
) {
if (!do_users) {
char str6[6];
char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1];
struct stat st;
time_t seconds;
str6[0] = '?';
str6[1] = '\0';
strcpy(name, "/dev/");
safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1,
ut->ut_line,
sizeof(ut->ut_line)+1
);
if (stat(name, &st) == 0)
idle_string(str6, st.st_atime);
/* manpages say ut_tv.tv_sec *is* time_t,
* but some systems have it wrong */
seconds = ut->ut_tv.tv_sec;
/* How wide time field can be?
* "Nov 10 19:33:20": 15 chars
* "2010-11-10 19:33": 16 chars
*/
printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n",
(int)sizeof(ut->ut_user), ut->ut_user,
(int)sizeof(ut->ut_line), ut->ut_line,
str6,
ctime(&seconds) + 4,
(int)sizeof(ut->ut_host), ut->ut_host
);
} else {
printf(fmt, ut->ut_user);
fmt = " %s";
}
}
}
if (do_users)
bb_putchar('\n');
if (ENABLE_FEATURE_CLEAN_UP)
endutxent();
return EXIT_SUCCESS;
}
|
