forked from github/multus-cni
ac21a96804
gomodule is still in progress to migrate for now, hence multus team decide to keep vendor directory to support build without gomodule.
98 lines
1.9 KiB
Go
98 lines
1.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Fork, exec, wait, etc.
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package windows
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// EscapeArg rewrites command line argument s as prescribed
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// in http://msdn.microsoft.com/en-us/library/ms880421.
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// This function returns "" (2 double quotes) if s is empty.
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// Alternatively, these transformations are done:
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// - every back slash (\) is doubled, but only if immediately
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// followed by double quote (");
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// - every double quote (") is escaped by back slash (\);
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// - finally, s is wrapped with double quotes (arg -> "arg"),
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// but only if there is space or tab inside s.
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func EscapeArg(s string) string {
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if len(s) == 0 {
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return "\"\""
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}
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n := len(s)
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hasSpace := false
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for i := 0; i < len(s); i++ {
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switch s[i] {
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case '"', '\\':
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n++
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case ' ', '\t':
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hasSpace = true
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}
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}
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if hasSpace {
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n += 2
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}
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if n == len(s) {
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return s
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}
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qs := make([]byte, n)
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j := 0
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if hasSpace {
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qs[j] = '"'
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j++
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}
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slashes := 0
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for i := 0; i < len(s); i++ {
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switch s[i] {
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default:
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slashes = 0
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qs[j] = s[i]
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case '\\':
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slashes++
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qs[j] = s[i]
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case '"':
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for ; slashes > 0; slashes-- {
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qs[j] = '\\'
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j++
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}
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qs[j] = '\\'
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j++
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qs[j] = s[i]
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}
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j++
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}
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if hasSpace {
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for ; slashes > 0; slashes-- {
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qs[j] = '\\'
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j++
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}
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qs[j] = '"'
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j++
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}
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return string(qs[:j])
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}
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func CloseOnExec(fd Handle) {
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SetHandleInformation(Handle(fd), HANDLE_FLAG_INHERIT, 0)
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}
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// FullPath retrieves the full path of the specified file.
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func FullPath(name string) (path string, err error) {
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p, err := UTF16PtrFromString(name)
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if err != nil {
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return "", err
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}
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n := uint32(100)
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for {
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buf := make([]uint16, n)
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n, err = GetFullPathName(p, uint32(len(buf)), &buf[0], nil)
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if err != nil {
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return "", err
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}
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if n <= uint32(len(buf)) {
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return UTF16ToString(buf[:n]), nil
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}
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}
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}
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