root/src/lib9/run_plan9.c

DEFINITIONS

1. runcmd

// Copyright 2013 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build plan9

#include <u.h>
#include <libc.h>

int
runcmd(char **argv)
{
        int pid;
        Waitmsg *w;
        
        switch(pid = fork()) {
        case -1:
                return -1;
        case 0:
                exec(argv[0], argv);
                fprint(2, "exec %s: %r\n", argv[0]);
                exits("exec");
        }
        
        w = wait();
        if(w == nil)
                return -1;
        if(w->pid != pid) {
                werrstr("unexpected pid in wait");
                free(w);
                return -1;
        }
        if(w->msg[0]) {
                werrstr("unsuccessful exit status: %s", w->msg);
                free(w);
                return -1;
        }
        free(w);
        return 0;
}