os: add an optional "mode" parameter to os.mkdir and os.mkdir_all (#14887)

cmd/tools/vcheck-md.v

@@ -58,7 +58,7 @@ fn main() {
 	if term_colors {
 		os.setenv('VCOLORS', 'always', true)
 	}
-	os.mkdir_all(vcheckfolder) or {}
+	os.mkdir_all(vcheckfolder, mode: 0o700) or {} // keep directory private
 	defer {
 		os.rmdir_all(vcheckfolder) or {}
 	}

vlib/os/os.v

@@ -622,8 +622,13 @@ pub fn log(s string) {
 	println('os.log: ' + s)
 }
 
+[params]
+pub struct MkdirParams {
+	mode u32 = 0o777 // note that the actual mode is affected by the process's umask
+}
+
 // mkdir_all will create a valid full path of all directories given in `path`.
-pub fn mkdir_all(opath string) ? {
+pub fn mkdir_all(opath string, params MkdirParams) ? {
 	path := opath.replace('/', path_separator)
 	mut p := if path.starts_with(path_separator) { path_separator } else { '' }
 	path_parts := path.trim_left(path_separator).split(path_separator)
@@ -632,7 +637,7 @@ pub fn mkdir_all(opath string) ? {
 		if exists(p) && is_dir(p) {
 			continue
 		}
-		mkdir(p) or { return error('folder: $p, error: $err') }
+		mkdir(p, params) or { return error('folder: $p, error: $err') }
 	}
 }
 

vlib/os/os_js.js.v

@@ -1,6 +1,6 @@
 module os
 
-pub fn mkdir(path string) ?bool {
+pub fn mkdir(path string, params MkdirParams) ?bool {
 	$if js_node {
 		if path == '.' {
 			return true

vlib/os/os_nix.c.v

@@ -296,7 +296,7 @@ pub fn is_dir(path string) bool {
 */
 
 // mkdir creates a new directory with the specified path.
-pub fn mkdir(path string) ?bool {
+pub fn mkdir(path string, params MkdirParams) ?bool {
 	if path == '.' {
 		return true
 	}
@@ -313,7 +313,7 @@ pub fn mkdir(path string) ?bool {
 	/*
 	$if linux {
 		$if !android {
-			ret := C.syscall(sys_mkdir, apath.str, 511)
+			ret := C.syscall(sys_mkdir, apath.str, params.mode)
 			if ret == -1 {
 				return error(posix_get_error_msg(C.errno))
 			}
@@ -321,7 +321,7 @@ pub fn mkdir(path string) ?bool {
 		}
 	}
 	*/
-	r := unsafe { C.mkdir(&char(apath.str), 511) }
+	r := unsafe { C.mkdir(&char(apath.str), params.mode) }
 	if r == -1 {
 		return error(posix_get_error_msg(C.errno))
 	}

vlib/os/os_test.v

@@ -200,7 +200,7 @@ fn test_ls() {
 
 fn create_tree() ? {
 	os.mkdir_all('myfolder/f1/f2/f3')?
-	os.mkdir_all('myfolder/a1/a2/a3')?
+	os.mkdir_all('myfolder/a1/a2/a3', mode: 0o700)?
 	f3 := os.real_path('myfolder/f1/f2/f3')
 	assert os.is_dir(f3)
 	create_file('myfolder/f1/f2/f3/a.txt')?

vlib/os/os_windows.c.v

@@ -203,7 +203,7 @@ pub fn is_dir(path string) bool {
 }
 */
 // mkdir creates a new directory with the specified path.
-pub fn mkdir(path string) ?bool {
+pub fn mkdir(path string, params MkdirParams) ?bool {
 	if path == '.' {
 		return true
 	}

vlib/v/util/util.v

@@ -493,7 +493,7 @@ pub fn get_vtmp_folder() string {
 	uid := os.getuid()
 	vtmp = os.join_path_single(os.temp_dir(), 'v_$uid')
 	if !os.exists(vtmp) || !os.is_dir(vtmp) {
-		os.mkdir_all(vtmp) or { panic(err) }
+		os.mkdir_all(vtmp, mode: 0o700) or { panic(err) } // keep directory private
 	}
 	os.setenv('VTMP', vtmp, true)
 	return vtmp

vlib/v/vcache/vcache.v

@@ -42,7 +42,7 @@ pub fn new_cache_manager(opts []string) CacheManager {
 	nlog(@FN, 'vcache_basepath: $vcache_basepath\n         opts: $opts\n      os.args: ${os.args.join(' ')}')
 	dlog(@FN, 'vcache_basepath: $vcache_basepath | opts:\n     $opts')
 	if !os.is_dir(vcache_basepath) {
-		os.mkdir_all(vcache_basepath) or { panic(err) }
+		os.mkdir_all(vcache_basepath, mode: 0o700) or { panic(err) } // keep directory private
 		dlog(@FN, 'created folder:\n    $vcache_basepath')
 	}
 	readme_file := os.join_path(vcache_basepath, 'README.md')
@@ -90,7 +90,6 @@ pub fn (mut cm CacheManager) key2cpath(key string) string {
 		cpath = os.join_path(cprefix_folder, khash)
 		if !os.is_dir(cprefix_folder) {
 			os.mkdir_all(cprefix_folder) or { panic(err) }
-			os.chmod(cprefix_folder, 0o777) or { panic(err) }
 		}
 		dlog(@FN, 'new hk')
 		dlog(@FN, '       key: $key')