3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
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.
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.
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.
33 return (pipe(p)!=-1 &&
34 fcntl(p[1], F_SETFD, FD_CLOEXEC)!=-1);
38 Command_exec(struct Command *cmd, bool do_fork)
42 Vector_zeroEnd(&cmd->params);
46 else if (!initPipes(p) ||
47 (cmd->pid = fork())==-1) {
53 if (do_fork) close(p[0]);
55 execv(cmd->filename ? cmd->filename : ((char **)(Vector_begin(&cmd->params)))[0],
58 assert(cmd->err != 0);
61 write(p[1], &cmd->err, sizeof(cmd->err));
62 _exit(1); // implicates 'close(p[1])'
67 if (read(p[0], &cmd->err, sizeof(cmd->err))==0)
69 else // cleanup zombies
70 while (wait4(cmd->pid, 0,0,0)==-1 &&
71 (errno==EINTR || errno==EAGAIN)) {};