blob: f955ce6d35d578d436fdb16dac138092c68e85e0
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 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
16 | * |
17 | *---------------------------------------------------------------------- |
18 | */ |
19 | /* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */ |
20 | |
21 | //config:config WHO |
22 | //config: bool "who" |
23 | //config: default y |
24 | //config: depends on FEATURE_UTMP |
25 | //config: help |
26 | //config: who is used to show who is logged on. |
27 | |
28 | //config:config USERS |
29 | //config: bool "users" |
30 | //config: default y |
31 | //config: depends on FEATURE_UTMP |
32 | //config: help |
33 | //config: Print users currently logged on. |
34 | |
35 | //applet:IF_USERS(APPLET_ODDNAME(users, who, BB_DIR_USR_BIN, BB_SUID_DROP, users)) |
36 | //applet:IF_WHO( APPLET( who, BB_DIR_USR_BIN, BB_SUID_DROP)) |
37 | |
38 | //kbuild:lib-$(CONFIG_USERS) += who.o |
39 | //kbuild:lib-$(CONFIG_WHO) += who.o |
40 | |
41 | //usage:#define users_trivial_usage |
42 | //usage: "" |
43 | //usage:#define users_full_usage "\n\n" |
44 | //usage: "Print the users currently logged on" |
45 | |
46 | //usage:#define who_trivial_usage |
47 | //usage: "[-a]" |
48 | //usage:#define who_full_usage "\n\n" |
49 | //usage: "Show who is logged on\n" |
50 | //usage: "\n -a Show all" |
51 | //usage: "\n -H Print column headers" |
52 | |
53 | #include "libbb.h" |
54 | |
55 | static void idle_string(char *str6, time_t t) |
56 | { |
57 | t = time(NULL) - t; |
58 | |
59 | /*if (t < 60) { |
60 | str6[0] = '.'; |
61 | str6[1] = '\0'; |
62 | return; |
63 | }*/ |
64 | if (t >= 0 && t < (24 * 60 * 60)) { |
65 | sprintf(str6, "%02d:%02d", |
66 | (int) (t / (60 * 60)), |
67 | (int) ((t % (60 * 60)) / 60)); |
68 | return; |
69 | } |
70 | strcpy(str6, "old"); |
71 | } |
72 | |
73 | int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
74 | int who_main(int argc UNUSED_PARAM, char **argv) |
75 | { |
76 | struct utmp *ut; |
77 | unsigned opt; |
78 | int do_users = (ENABLE_USERS && (!ENABLE_WHO || applet_name[0] == 'u')); |
79 | const char *fmt = "%s"; |
80 | |
81 | opt_complementary = "=0"; |
82 | opt = getopt32(argv, do_users ? "" : "aH"); |
83 | if (opt & 2) // -H |
84 | printf("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST\n"); |
85 | |
86 | setutent(); |
87 | while ((ut = getutent()) != NULL) { |
88 | if (ut->ut_user[0] |
89 | && ((opt & 1) || ut->ut_type == USER_PROCESS) |
90 | ) { |
91 | if (!do_users) { |
92 | char str6[6]; |
93 | char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1]; |
94 | struct stat st; |
95 | time_t seconds; |
96 | |
97 | str6[0] = '?'; |
98 | str6[1] = '\0'; |
99 | strcpy(name, "/dev/"); |
100 | safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1, |
101 | ut->ut_line, |
102 | sizeof(ut->ut_line)+1 |
103 | ); |
104 | if (stat(name, &st) == 0) |
105 | idle_string(str6, st.st_atime); |
106 | /* manpages say ut_tv.tv_sec *is* time_t, |
107 | * but some systems have it wrong */ |
108 | seconds = ut->ut_tv.tv_sec; |
109 | /* How wide time field can be? |
110 | * "Nov 10 19:33:20": 15 chars |
111 | * "2010-11-10 19:33": 16 chars |
112 | */ |
113 | printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n", |
114 | (int)sizeof(ut->ut_user), ut->ut_user, |
115 | (int)sizeof(ut->ut_line), ut->ut_line, |
116 | str6, |
117 | ctime(&seconds) + 4, |
118 | (int)sizeof(ut->ut_host), ut->ut_host |
119 | ); |
120 | } else { |
121 | printf(fmt, ut->ut_user); |
122 | fmt = " %s"; |
123 | } |
124 | } |
125 | } |
126 | if (do_users) |
127 | bb_putchar('\n'); |
128 | if (ENABLE_FEATURE_CLEAN_UP) |
129 | endutent(); |
130 | return EXIT_SUCCESS; |
131 | } |
132 |