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 tarball for details. 16 * 17 *---------------------------------------------------------------------- 18 */ 19 20#include "libbb.h" 21#include <utmp.h> 22#include <time.h> 23 24static void idle_string(char *str6, time_t t) 25{ 26 t = time(NULL) - t; 27 28 /*if (t < 60) { 29 str6[0] = '.'; 30 str6[1] = '\0'; 31 return; 32 }*/ 33 if (t >= 0 && t < (24 * 60 * 60)) { 34 sprintf(str6, "%02d:%02d", 35 (int) (t / (60 * 60)), 36 (int) ((t % (60 * 60)) / 60)); 37 return; 38 } 39 strcpy(str6, "old"); 40} 41 42int who_main(int argc, char **argv); 43int who_main(int argc, char **argv) 44{ 45 char str6[6]; 46 struct utmp *ut; 47 struct stat st; 48 char *name; 49 50 if (argc > 1) { 51 bb_show_usage(); 52 } 53 54 setutent(); 55 printf("USER TTY IDLE TIME HOST\n"); 56 while ((ut = getutent()) != NULL) { 57 if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) { 58 time_t thyme = ut->ut_tv.tv_sec; 59 60 /* ut->ut_line is device name of tty - "/dev/" */ 61 name = concat_path_file("/dev", ut->ut_line); 62 str6[0] = '?'; 63 str6[1] = '\0'; 64 if (stat(name, &st) == 0) 65 idle_string(str6, st.st_atime); 66 printf("%-10s %-8s %-9s %-14.14s %s\n", 67 ut->ut_user, ut->ut_line, str6, 68 ctime(&thyme) + 4, ut->ut_host); 69 if (ENABLE_FEATURE_CLEAN_UP) 70 free(name); 71 } 72 } 73 if (ENABLE_FEATURE_CLEAN_UP) 74 endutent(); 75 return 0; 76} 77