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// Copyright 2009 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.
package main
import (
"exec"
"fmt"
"go/token"
"io/ioutil"
"os"
)
// run runs the command argv, feeding in stdin on standard input.
// It returns the output to standard output and standard error.
// ok indicates whether the command exited successfully.
func run(stdin []byte, argv []string) (stdout, stderr []byte, ok bool) {
cmd, err := exec.LookPath(argv[0])
if err != nil {
fatalf("exec %s: %s", argv[0], err)
}
r0, w0, err := os.Pipe()
if err != nil {
fatalf("%s", err)
}
r1, w1, err := os.Pipe()
if err != nil {
fatalf("%s", err)
}
r2, w2, err := os.Pipe()
if err != nil {
fatalf("%s", err)
}
p, err := os.StartProcess(cmd, argv, &os.ProcAttr{Files: []*os.File{r0, w1, w2}})
if err != nil {
fatalf("%s", err)
}
defer p.Release()
r0.Close()
w1.Close()
w2.Close()
c := make(chan bool)
go func() {
w0.Write(stdin)
w0.Close()
c <- true
}()
go func() {
stdout, _ = ioutil.ReadAll(r1)
r1.Close()
c <- true
}()
stderr, _ = ioutil.ReadAll(r2)
r2.Close()
<-c
<-c
w, err := p.Wait(0)
if err != nil {
fatalf("%s", err)
}
ok = w.Exited() && w.ExitStatus() == 0
return
}
// Die with an error message.
func fatalf(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg+"\n", args...)
os.Exit(2)
}
var nerrors int
func error(pos token.Pos, msg string, args ...interface{}) {
nerrors++
if pos.IsValid() {
fmt.Fprintf(os.Stderr, "%s: ", fset.Position(pos).String())
}
fmt.Fprintf(os.Stderr, msg, args...)
fmt.Fprintf(os.Stderr, "\n")
}
// isName returns true if s is a valid C identifier
func isName(s string) bool {
for i, v := range s {
if v != '_' && (v < 'A' || v > 'Z') && (v < 'a' || v > 'z') && (v < '0' || v > '9') {
return false
}
if i == 0 && '0' <= v && v <= '9' {
return false
}
}
return s != ""
}
func creat(name string) *os.File {
f, err := os.Create(name)
if err != nil {
fatalf("%s", err)
}
return f
}
func slashToUnderscore(c int) int {
if c == '/' {
c = '_'
}
return c
}
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