ccache/execute.c

/*
   Copyright (C) Andrew Tridgell 2002
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "ccache.h"


/*
  execute a compiler backend, capturing all output to the given paths
  the full path to the compiler to run is in argv[0]
*/
int execute(char **argv, 
	    const char *path_stdout,
	    const char *path_stderr)
{
	pid_t pid;
	int status;

	pid = fork();
	if (pid == -1) fatal("Failed to fork");
	
	if (pid == 0) {
		int fd;

		unlink(path_stdout);
		fd = open(path_stdout, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
		if (fd == -1) {
			exit(STATUS_NOCACHE);
		}
		dup2(fd, 1);
		close(fd);

		unlink(path_stderr);
		fd = open(path_stderr, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL, 0644);
		if (fd == -1) {
			exit(STATUS_NOCACHE);
		}
		dup2(fd, 2);
		close(fd);

		exit(execv(argv[0], argv));
	}

	if (waitpid(pid, &status, 0) != pid) {
		fatal("waitpid failed");
	}

	return WEXITSTATUS(status);
}