github.com/rohankumardubey/syslog-redirector-golang@v0.0.0-20140320174030-4859f03d829a/src/lib9/run_plan9.c (about)

     1  // Copyright 2013 The Go Authors.  All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include <u.h>
     6  #include <libc.h>
     7  
     8  int
     9  runcmd(char **argv)
    10  {
    11  	int pid;
    12  	Waitmsg *w;
    13  	
    14  	switch(pid = fork()) {
    15  	case -1:
    16  		return -1;
    17  	case 0:
    18  		exec(argv[0], argv);
    19  		fprint(2, "exec %s: %r\n", argv[0]);
    20  		exits("exec");
    21  	}
    22  	
    23  	w = wait();
    24  	if(w == nil)
    25  		return -1;
    26  	if(w->pid != pid) {
    27  		werrstr("unexpected pid in wait");
    28  		free(w);
    29  		return -1;
    30  	}
    31  	if(w->msg[0]) {
    32  		werrstr("unsuccessful exit status: %s", w->msg);
    33  		free(w);
    34  		return -1;
    35  	}
    36  	free(w);
    37  	return 0;
    38  }