76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*----------------------------------------------------------------------
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* Mini who is used to display user name, login time,
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* idle time and host name.
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*
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* Author: Da Chen <dchen@ayrnetworks.com>
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*
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* This is a free document; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation:
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* http://www.gnu.org/copyleft/gpl.html
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*
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* Copyright (c) 2002 AYR Networks, Inc.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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*----------------------------------------------------------------------
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*/
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#include "libbb.h"
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#include <utmp.h>
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#include <time.h>
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static void idle_string(char *str6, time_t t)
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{
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t = time(NULL) - t;
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/*if (t < 60) {
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str6[0] = '.';
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str6[1] = '\0';
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return;
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}*/
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if (t >= 0 && t < (24 * 60 * 60)) {
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sprintf(str6, "%02d:%02d",
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(int) (t / (60 * 60)),
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(int) ((t % (60 * 60)) / 60));
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return;
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}
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strcpy(str6, "old");
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}
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int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int who_main(int argc, char **argv)
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{
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char str6[6];
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struct utmp *ut;
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struct stat st;
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char *name;
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unsigned opt;
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opt_complementary = "=0";
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opt = getopt32(argv, "a");
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setutent();
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printf("USER TTY IDLE TIME HOST\n");
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while ((ut = getutent()) != NULL) {
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if (ut->ut_user[0] && (opt || ut->ut_type == USER_PROCESS)) {
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/* ut->ut_line is device name of tty - "/dev/" */
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name = concat_path_file("/dev", ut->ut_line);
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str6[0] = '?';
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str6[1] = '\0';
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if (stat(name, &st) == 0)
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idle_string(str6, st.st_atime);
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/* 15 chars for time: Nov 10 19:33:20 */
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printf("%-10s %-8s %-9s %-15.15s %s\n",
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ut->ut_user, ut->ut_line, str6,
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ctime(&(ut->ut_tv.tv_sec)) + 4, ut->ut_host);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(name);
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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endutent();
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return 0;
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}
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