1 /* who.c - display who is on the system 2 * 3 * Copyright 2012 ProFUSION Embedded Systems 4 * 5 * by Luis Felipe Strano Moraes <lfelipe@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 * TODO: -a doesn't know how to format other entries 13 14 USE_WHO(NEWTOY(who, "a", TOYFLAG_USR|TOYFLAG_BIN)) 15 16 config WHO 17 bool "who" 18 default y 19 depends on TOYBOX_UTMPX 20 help 21 usage: who 22 23 Print information about logged in users. 24 */ 25 26 #define FOR_who 27 #include "toys.h" 28 who_main(void)29 void who_main(void) 30 { 31 struct utmpx *entry; 32 33 setutxent(); 34 while ((entry = getutxent())) { 35 if (FLAG(a) || entry->ut_type == USER_PROCESS) { 36 time_t t = entry->ut_tv.tv_sec; 37 struct tm *tm = localtime(&t); 38 39 strftime(toybuf, sizeof(toybuf), "%F %H:%M", tm); 40 printf("%s\t%s\t%s (%s)\n", entry->ut_user, entry->ut_line, 41 toybuf, entry->ut_host); 42 } 43 } 44 endutxent(); 45 } 46