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//go:build linux
// SPDX-License-Identifier: MPL-2.0
/*
* libpathrs: safe path resolution on Linux
* Copyright (C) 2019-2025 Aleksa Sarai <cyphar@cyphar.com>
* Copyright (C) 2019-2025 SUSE LLC
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
package pathrs
import (
"fmt"
"os"
"golang.org/x/sys/unix"
)
//nolint:cyclop // this function needs to handle a lot of cases
func toUnixMode(mode os.FileMode, needsType bool) (uint32, error) {
sysMode := uint32(mode.Perm())
switch mode & os.ModeType { //nolint:exhaustive // we only care about ModeType bits
case 0:
if needsType {
sysMode |= unix.S_IFREG
}
case os.ModeDir:
sysMode |= unix.S_IFDIR
case os.ModeSymlink:
sysMode |= unix.S_IFLNK
case os.ModeCharDevice | os.ModeDevice:
sysMode |= unix.S_IFCHR
case os.ModeDevice:
sysMode |= unix.S_IFBLK
case os.ModeNamedPipe:
sysMode |= unix.S_IFIFO
case os.ModeSocket:
sysMode |= unix.S_IFSOCK
default:
return 0, fmt.Errorf("invalid mode filetype %+o", mode)
}
if mode&os.ModeSetuid != 0 {
sysMode |= unix.S_ISUID
}
if mode&os.ModeSetgid != 0 {
sysMode |= unix.S_ISGID
}
if mode&os.ModeSticky != 0 {
sysMode |= unix.S_ISVTX
}
return sysMode, nil
}
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