commit 5fbd6044bce8b032c72378a0db5106c235df9067
author Shenghou Ma <minux.ma@gmail.com> Sat Mar 01 18:56:50 2014 -0500
committer Shenghou Ma <minux.ma@gmail.com> Sat Mar 01 18:56:50 2014 -0500
tree 53aca568e41b34900ab8acf0b6913e033831bcb1
parent 5b456c74889e0316feda328bf3be1ed11f549519

syscall: workaround Dragonfly BSD kernel exec bug
See also CL 4259056 for FreeBSD.

Test program:
// exec.go
package main
import (
        "log"
        "os"
        "os/exec"
        "runtime"
)
func main() {
        path := runtime.GOROOT() + "/src/pkg/net/http/cgi/testdata"
        cmd := &exec.Cmd{
                Path:   "test.cgi",
                Args:   []string{path + "/test.cgi"},
                Dir:    path
                Stdout: os.Stdout}
        if err := cmd.Start(); err != nil {
                log.Fatal(err)
        }
        if err := cmd.Wait(); err != nil {
                log.Fatal(err)
        }
}

$ go run exec.go
2014/03/01 15:52:41 fork/exec test.cgi: argument list too long

LGTM=iant
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/69970044