diff options
Diffstat (limited to 'libgo/go/exec/lp_windows.go')
-rw-r--r-- | libgo/go/exec/lp_windows.go | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libgo/go/exec/lp_windows.go b/libgo/go/exec/lp_windows.go new file mode 100644 index 000000000..7b56afa85 --- /dev/null +++ b/libgo/go/exec/lp_windows.go @@ -0,0 +1,66 @@ +// Copyright 2010 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 exec + +import ( + "os" + "strings" +) + +func chkStat(file string) bool { + d, err := os.Stat(file) + if err != nil { + return false + } + return d.IsRegular() +} + +func canExec(file string, exts []string) (string, bool) { + if len(exts) == 0 { + return file, chkStat(file) + } + f := strings.ToLower(file) + for _, e := range exts { + if strings.HasSuffix(f, e) { + return file, chkStat(file) + } + } + for _, e := range exts { + if f := file + e; chkStat(f) { + return f, true + } + } + return ``, false +} + +func LookPath(file string) (string, os.Error) { + exts := []string{} + if x := os.Getenv(`PATHEXT`); x != `` { + exts = strings.Split(strings.ToLower(x), `;`, -1) + for i, e := range exts { + if e == `` || e[0] != '.' { + exts[i] = `.` + e + } + } + } + if strings.Contains(file, `\`) || strings.Contains(file, `/`) { + if f, ok := canExec(file, exts); ok { + return f, nil + } + return ``, &os.PathError{"lookpath", file, os.ENOENT} + } + if pathenv := os.Getenv(`PATH`); pathenv == `` { + if f, ok := canExec(`.\`+file, exts); ok { + return f, nil + } + } else { + for _, dir := range strings.Split(pathenv, `;`, -1) { + if f, ok := canExec(dir+`\`+file, exts); ok { + return f, nil + } + } + } + return ``, &os.PathError{"lookpath", file, os.ENOENT} +} |