hush/coreutils/who.c
Denys Vlasenko 37f5bef63c libbb: split update_utmp from login/getty in preparation to use it for telnetd
function                                             old     new   delta
update_utent                                           -     339    +339
login_main                                          1498    1128    -370
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 339/-370)          Total: -31 bytes

function                                             old     new   delta
update_utmp                                          246     337     +91
login_main                                          1128    1140     +12
getty_main                                          1908    1918     +10
...
update_utent                                         339       -    -339
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 5/6 up/down: 119/-368)         Total: -249 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-04-05 03:18:40 +02:00

92 lines
2.3 KiB
C

/* 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.
*
*----------------------------------------------------------------------
*/
/* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */
#include "libbb.h"
#include <utmp.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 utmp *ut;
unsigned opt;
opt_complementary = "=0";
opt = getopt32(argv, "aH");
if (opt & 2) // -H
printf("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST\n");
setutent();
while ((ut = getutent()) != NULL) {
if (ut->ut_user[0]
&& ((opt & 1) || ut->ut_type == USER_PROCESS)
) {
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
);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
endutent();
return EXIT_SUCCESS;
}