command-wait.c (1179B)
1 // $Id$ --*- c -*-- 2 3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de> 4 // 5 // This program is free software; you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation; version 2 of the License. 8 // 9 // This program is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with this program; if not, write to the Free Software 16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include "command.h" 24 #include <errno.h> 25 26 bool 27 Command_wait(struct Command *cmd, bool do_block) 28 { 29 int rc; 30 31 if (cmd->rc!=-1) return true; 32 33 switch (wait4(cmd->pid, &rc, (!do_block ? WNOHANG : 0), &cmd->rusage)) { 34 case 0 : break; 35 case -1 : cmd->err = errno; break; 36 default : cmd->rc = rc; return true; 37 } 38 39 return false; 40 }