1 /* who.c - display who is on the system 2 * 3 * Copyright 2012 ProFUSION Embedded Systems 4 * 5 * by Luis Felipe Strano Moraes <lfelipe (at) profusion.mobi> 6 * 7 * See http://opengroup.org/onlinepubs/9699919799/utilities/who.html 8 * 9 * Posix says to support many options (-abdHlmpqrstTu) but this 10 * isn't aimed at minicomputers with modem pools. 11 12 USE_WHO(NEWTOY(who, "a", TOYFLAG_USR|TOYFLAG_BIN)) 13 14 config WHO 15 bool "who" 16 default y 17 depends on TOYBOX_UTMPX 18 help 19 usage: who 20 21 Print logged user information on system 22 */ 23 24 #define FOR_who 25 #include "toys.h" 26 27 void who_main(void) 28 { 29 struct utmpx *entry; 30 31 setutxent(); 32 33 while ((entry = getutxent())) { 34 if ((toys.optflags & FLAG_a) || entry->ut_type == USER_PROCESS) { 35 time_t time; 36 int time_size; 37 char *times; 38 39 time = entry->ut_tv.tv_sec; 40 times = ctime(&time); 41 time_size = strlen(times) - 2; 42 printf("%s\t%s\t%*.*s\t(%s)\n", entry->ut_user, entry->ut_line, 43 time_size, time_size, ctime(&time), entry->ut_host); 44 } 45 } 46 47 endutxent(); 48 } 49
