os: add missing documentation (#6234)
Larpon
GitHub
parent
b4f03e1c32
commit
d982aa54e8
133
vlib/os/os.v
133
vlib/os/os.v
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@ -8,6 +8,7 @@ pub const (
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max_path_len = 4096
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)
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// read_bytes returns all bytes read from file in `path`.
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pub fn read_bytes(path string) ?[]byte {
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mut fp := vfopen(path, 'rb')
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if isnil(fp) {
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@ -61,33 +62,33 @@ pub fn file_size(path string) int {
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return s.st_size
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}
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// move files or folders from one path to other
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pub fn mv(old, new string) {
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// mv moves files or folders from `src` to `dst`.
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pub fn mv(src, dst string) {
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$if windows {
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C._wrename(old.to_wide(), new.to_wide())
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C._wrename(src.to_wide(), dst.to_wide())
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} $else {
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C.rename(charptr(old.str), charptr(new.str))
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C.rename(charptr(src.str), charptr(dst.str))
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}
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}
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// copies files or folders from one path to other
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pub fn cp(old, new string) ? {
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// cp copies files or folders from `src` to `dst`.
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pub fn cp(src, dst string) ? {
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$if windows {
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w_old := old.replace('/', '\\')
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w_new := new.replace('/', '\\')
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if C.CopyFile(w_old.to_wide(), w_new.to_wide(), false) == 0 {
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w_src := src.replace('/', '\\')
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w_dst := dst.replace('/', '\\')
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if C.CopyFile(w_src.to_wide(), w_dst.to_wide(), false) == 0 {
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result := C.GetLastError()
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return error_with_code('failed to copy $old to $new', int(result))
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return error_with_code('failed to copy $src to $dst', int(result))
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}
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} $else {
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fp_from := C.open(charptr(old.str), C.O_RDONLY)
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fp_from := C.open(charptr(src.str), C.O_RDONLY)
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if fp_from < 0 { // Check if file opened
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return error_with_code('cp: failed to open $old', int(fp_from))
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return error_with_code('cp: failed to open $src', int(fp_from))
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}
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fp_to := C.open(charptr(new.str), C.O_WRONLY | C.O_CREAT | C.O_TRUNC, C.S_IWUSR | C.S_IRUSR)
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fp_to := C.open(charptr(dst.str), C.O_WRONLY | C.O_CREAT | C.O_TRUNC, C.S_IWUSR | C.S_IRUSR)
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if fp_to < 0 { // Check if file opened (permissions problems ...)
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C.close(fp_from)
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return error_with_code('cp (permission): failed to write to $new (fp_to: $fp_to)', int(fp_to))
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return error_with_code('cp (permission): failed to write to $dst (fp_to: $fp_to)', int(fp_to))
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}
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mut buf := [1024]byte{}
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mut count := 0
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@ -99,15 +100,15 @@ pub fn cp(old, new string) ? {
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break
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}
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if C.write(fp_to, buf, count) < 0 {
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return error_with_code('cp: failed to write to $new', int(-1))
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return error_with_code('cp: failed to write to $dst', int(-1))
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}
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}
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from_attr := C.stat{}
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unsafe {
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C.stat(charptr(old.str), &from_attr)
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C.stat(charptr(src.str), &from_attr)
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}
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if C.chmod(charptr(new.str), from_attr.st_mode) < 0 {
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return error_with_code('failed to set permissions for $new', int(-1))
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if C.chmod(charptr(dst.str), from_attr.st_mode) < 0 {
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return error_with_code('failed to set permissions for $dst', int(-1))
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}
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C.close(fp_to)
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C.close(fp_from)
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@ -120,9 +121,11 @@ pub fn cp_r(osource_path, odest_path string, overwrite bool) ? {
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return cp_all(osource_path, odest_path, overwrite)
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}
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pub fn cp_all(osource_path, odest_path string, overwrite bool) ? {
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source_path := os.real_path(osource_path)
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dest_path := os.real_path(odest_path)
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// cp_all will recursively copy `src` to `dst`,
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// optionally overwriting files or dirs in `dst`.
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pub fn cp_all(src, dst string, overwrite bool) ? {
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source_path := os.real_path(src)
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dest_path := os.real_path(dst)
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if !os.exists(source_path) {
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return error("Source path doesn\'t exist")
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}
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@ -165,7 +168,7 @@ os.join_path(dest_path,os.file_name(source_path)) } else { dest_path }
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}
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// mv_by_cp first copies the source file, and if it is copied successfully, deletes the source file.
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// mv_by_cp may be used when you are not sure that the source and target are on the same mount/partition.
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// may be used when you are not sure that the source and target are on the same mount/partition.
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pub fn mv_by_cp(source string, target string) ? {
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os.cp(source, target) or {
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return error(err)
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@ -186,7 +189,7 @@ pub fn vfopen(path, mode string) &C.FILE {
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}
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}
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// fileno returns the file descriptor of an opened C file
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// fileno returns the file descriptor of an opened C file.
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pub fn fileno(cfile voidptr) int {
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$if windows {
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return C._fileno(cfile)
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@ -207,6 +210,7 @@ pub fn read_lines(path string) ?[]string {
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return buf.split_into_lines()
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}
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// read_ulines reads the file in `path` into an array of ustring lines.
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fn read_ulines(path string) ?[]ustring {
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lines := read_lines(path) or {
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return error(err)
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@ -220,6 +224,7 @@ fn read_ulines(path string) ?[]ustring {
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return ulines
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}
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// open_append opens `path` file for appending.
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pub fn open_append(path string) ?File {
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mut file := File{}
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$if windows {
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@ -241,7 +246,7 @@ pub fn open_append(path string) ?File {
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return file
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}
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// open_file can be used to open or create a file with custom flags and permissions and returns a `File` object
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// open_file can be used to open or create a file with custom flags and permissions and returns a `File` object.
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pub fn open_file(path string, mode string, options ...int) ?File {
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mut flags := 0
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for m in mode {
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@ -293,7 +298,7 @@ pub fn open_file(path string, mode string, options ...int) ?File {
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}
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}
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// system starts the specified command, waits for it to complete, and returns its code.
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// vpopen system starts the specified command, waits for it to complete, and returns its code.
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fn vpopen(path string) voidptr {
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// *C.FILE {
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$if windows {
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@ -334,6 +339,7 @@ pub fn posix_get_error_msg(code int) string {
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return tos3(ptr_text)
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}
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// vpclose will close a file pointer opened with `vpopen`.
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fn vpclose(f voidptr) int {
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$if windows {
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return C._pclose(f)
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@ -349,7 +355,8 @@ pub:
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output string
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// stderr string // TODO
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}
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// `system` works like `exec()`, but only returns a return code.
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// system works like `exec`, but only returns a return code.
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pub fn system(cmd string) int {
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// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
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// TODO remove panic
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@ -393,6 +400,7 @@ pub fn system(cmd string) int {
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return ret
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}
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// sigint_to_signal_name will translate `si` signal integer code to it's string code representation.
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pub fn sigint_to_signal_name(si int) string {
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// POSIX signals:
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match si {
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@ -480,7 +488,7 @@ const (
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r_ok = 4
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)
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// exists returns true if `path` exists.
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// exists returns true if `path` (file or directory) exists.
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pub fn exists(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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@ -490,7 +498,7 @@ pub fn exists(path string) bool {
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}
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}
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// `is_executable` returns `true` if `path` is executable.
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// is_executable returns `true` if `path` is executable.
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pub fn is_executable(path string) bool {
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$if windows {
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// NB: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/access-waccess?view=vs-2019
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@ -514,7 +522,7 @@ pub fn is_executable(path string) bool {
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return C.access(charptr(path.str), x_ok) != -1
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}
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// `is_writable` returns `true` if `path` is writable.
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// is_writable returns `true` if `path` is writable.
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pub fn is_writable(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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@ -524,7 +532,7 @@ pub fn is_writable(path string) bool {
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}
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}
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// `is_readable` returns `true` if `path` is readable.
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// is_readable returns `true` if `path` is readable.
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pub fn is_readable(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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@ -556,6 +564,7 @@ pub fn rm(path string) ? {
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}
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// C.unlink(path.cstr())
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}
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// rmdir removes a specified directory.
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pub fn rmdir(path string) ? {
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$if windows {
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@ -578,6 +587,7 @@ pub fn rmdir_recursive(path string) {
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rmdir_all(path)
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}
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// rmdir_all recursively removes the specified directory.
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pub fn rmdir_all(path string) ? {
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mut ret_err := ''
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items := os.ls(path) or {
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@ -595,6 +605,7 @@ pub fn rmdir_all(path string) ? {
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}
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}
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// is_dir_empty will return a `bool` whether or not `path` is empty.
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pub fn is_dir_empty(path string) bool {
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items := os.ls(path) or {
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return true
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@ -602,12 +613,15 @@ pub fn is_dir_empty(path string) bool {
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return items.len == 0
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}
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// print_c_errno will print the current value of `C.errno`.
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fn print_c_errno() {
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e := C.errno
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se := tos_clone(byteptr(C.strerror(C.errno)))
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println('errno=$e err=$se')
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}
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// file_ext will return the part after the last occurence of `.` in `path`.
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// The `.` is included.
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pub fn file_ext(path string) string {
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pos := path.last_index('.') or {
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return ''
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@ -615,6 +629,7 @@ pub fn file_ext(path string) string {
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return path[pos..]
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}
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// dir will return the part of `path` before the last occurence of a `path_separator`.
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pub fn dir(path string) string {
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pos := path.last_index(path_separator) or {
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return '.'
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@ -622,6 +637,8 @@ pub fn dir(path string) string {
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return path[..pos]
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}
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// base_dir will return the base directory of `path`.
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// The `path_separator` is included.
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pub fn base_dir(path string) string {
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posx := path.last_index(path_separator) or {
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return path.clone()
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@ -630,11 +647,13 @@ pub fn base_dir(path string) string {
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return path[..posx]
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}
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// file_name will return all characters found after the last occurence of `path_separator`.
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// file extension is included.
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pub fn file_name(path string) string {
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return path.all_after_last(path_separator)
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}
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// input returns a one-line string from stdin, after printing a prompt
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// input returns a one-line string from stdin, after printing a prompt.
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pub fn input(prompt string) string {
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print(prompt)
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flush()
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@ -651,7 +670,7 @@ pub fn get_line() string {
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}
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}
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// get_raw_line returns a one-line string from stdin along with '\n' if there is any
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// get_raw_line returns a one-line string from stdin along with '\n' if there is any.
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pub fn get_raw_line() string {
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$if windows {
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unsafe {
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@ -692,6 +711,7 @@ pub fn get_raw_line() string {
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}
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}
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// get_raw_stdin will get the raw input from stdin.
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pub fn get_raw_stdin() []byte {
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$if windows {
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unsafe {
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@ -721,6 +741,8 @@ pub fn get_raw_stdin() []byte {
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}
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}
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// get_lines returns an array of strings read from from stdin.
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// reading is stopped when an empty line is read.
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pub fn get_lines() []string {
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mut line := ''
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mut inputstr := []string{}
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@ -735,6 +757,8 @@ pub fn get_lines() []string {
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return inputstr
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}
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// get_lines_joined returns a string of the values read from from stdin.
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// reading is stopped when an empty line is read.
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pub fn get_lines_joined() string {
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mut line := ''
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mut inputstr := ''
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@ -814,7 +838,7 @@ pub fn write_file_array(path string, buffer array) ? {
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f.close()
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}
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// read_file_array reads an array of `T` values from file `path`
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// read_file_array reads an array of `T` values from file `path`.
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pub fn read_file_array<T>(path string) []T {
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a := T{}
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tsize := int(sizeof(a))
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@ -935,8 +959,8 @@ pub fn executable() string {
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return executable_fallback()
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}
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// executable_fallback is used when there is not a more platform specific and accurate implementation
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// it relies on path manipulation of os.args[0] and os.wd_at_startup, so it may not work properly in
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// executable_fallback is used when there is not a more platform specific and accurate implementation.
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// It relies on path manipulation of os.args[0] and os.wd_at_startup, so it may not work properly in
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// all cases, but it should be better, than just using os.args[0] directly.
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fn executable_fallback() string {
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if os.args.len == 0 {
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@ -986,7 +1010,7 @@ pub fn find_abs_path_of_executable(exepath string) ?string {
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return error('failed to find executable')
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}
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// exists_in_system_path returns true if prog exists in the system's path
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// exists_in_system_path returns `true` if `prog` exists in the system's PATH
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pub fn exists_in_system_path(prog string) bool {
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os.find_abs_path_of_executable(prog) or {
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return false
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@ -1000,7 +1024,7 @@ pub fn dir_exists(path string) bool {
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return is_dir(path)
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}
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// is_dir returns a boolean indicating whether the given path is a directory.
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// is_dir returns a `bool` indicating whether the given `path` is a directory.
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pub fn is_dir(path string) bool {
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$if windows {
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w_path := path.replace('/', '\\')
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@ -1023,7 +1047,7 @@ pub fn is_dir(path string) bool {
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}
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}
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// is_link returns a boolean indicating whether the given path is a link.
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// is_link returns a boolean indicating whether `path` is a link.
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pub fn is_link(path string) bool {
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$if windows {
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return false // TODO
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@ -1036,7 +1060,7 @@ pub fn is_link(path string) bool {
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}
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}
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// chdir changes the current working directory to the new directory path.
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// chdir changes the current working directory to the new directory in `path`.
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pub fn chdir(path string) {
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$if windows {
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C._wchdir(path.to_wide())
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@ -1045,7 +1069,7 @@ pub fn chdir(path string) {
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}
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}
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// getwd returns the absolute path name of the current directory.
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// getwd returns the absolute path of the current directory.
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pub fn getwd() string {
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$if windows {
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max := 512 // max_path_len * sizeof(wchar_t)
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@ -1063,7 +1087,7 @@ pub fn getwd() string {
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}
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}
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// Returns the full absolute path for fpath, with all relative ../../, symlinks and so on resolved.
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// real_path returns the full absolute path for fpath, with all relative ../../, symlinks and so on resolved.
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// See http://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
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// Also https://insanecoding.blogspot.com/2007/11/pathmax-simply-isnt.html
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// and https://insanecoding.blogspot.com/2007/11/implementing-realpath-in-c.html
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@ -1085,7 +1109,7 @@ pub fn real_path(fpath string) string {
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return unsafe { fullpath.vstring() }
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}
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// is_abs_path returns true if `path` is absolute.
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// is_abs_path returns `true` if `path` is absolute.
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pub fn is_abs_path(path string) bool {
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$if windows {
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return path[0] == `/` || // incase we're in MingGW bash
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@ -1094,7 +1118,7 @@ pub fn is_abs_path(path string) bool {
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return path[0] == `/`
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}
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// join returns path as string from string parameter(s).
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// join_path returns a path as string from input string parameter(s).
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pub fn join_path(base string, dirs ...string) string {
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mut result := []string{}
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result << base.trim_right('\\/')
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@ -1104,7 +1128,7 @@ pub fn join_path(base string, dirs ...string) string {
|
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return result.join(path_separator)
|
||||
}
|
||||
|
||||
// walk_ext returns a recursive list of all file paths ending with `ext`.
|
||||
// walk_ext returns a recursive list of all files in `path` ending with `ext`.
|
||||
pub fn walk_ext(path, ext string) []string {
|
||||
if !os.is_dir(path) {
|
||||
return []
|
||||
|
|
@ -1129,7 +1153,7 @@ pub fn walk_ext(path, ext string) []string {
|
|||
return res
|
||||
}
|
||||
|
||||
// walk recursively traverses the given directory path.
|
||||
// walk recursively traverses the given directory `path`.
|
||||
// When a file is encountred it will call the callback function with current file as argument.
|
||||
pub fn walk(path string, f fn(path string)) {
|
||||
if !os.is_dir(path) {
|
||||
|
|
@ -1150,13 +1174,14 @@ pub fn walk(path string, f fn(path string)) {
|
|||
return
|
||||
}
|
||||
|
||||
[unsafe]
|
||||
[unsafe] // signal will assign `handler` callback to be called when `signum` signal is recieved.
|
||||
pub fn signal(signum int, handler voidptr) {
|
||||
unsafe {
|
||||
C.signal(signum, handler)
|
||||
}
|
||||
}
|
||||
|
||||
// fork will fork the current system process and return the pid of the fork.
|
||||
pub fn fork() int {
|
||||
mut pid := -1
|
||||
$if !windows {
|
||||
|
|
@ -1168,6 +1193,8 @@ pub fn fork() int {
|
|||
return pid
|
||||
}
|
||||
|
||||
// wait blocks the calling process until one of its child processes exits or a signal is received.
|
||||
// After child process terminates, parent continues its execution after wait system call instruction.
|
||||
pub fn wait() int {
|
||||
mut pid := -1
|
||||
$if !windows {
|
||||
|
|
@ -1179,6 +1206,7 @@ pub fn wait() int {
|
|||
return pid
|
||||
}
|
||||
|
||||
// file_last_mod_unix returns the "last modified" time stamp of file in `path`.
|
||||
pub fn file_last_mod_unix(path string) int {
|
||||
attr := C.stat{}
|
||||
// # struct stat attr;
|
||||
|
|
@ -1190,6 +1218,7 @@ pub fn file_last_mod_unix(path string) int {
|
|||
// # return attr.st_mtime ;
|
||||
}
|
||||
|
||||
// log will print "os.log: "+`s` ...
|
||||
pub fn log(s string) {
|
||||
println('os.log: ' + s)
|
||||
}
|
||||
|
|
@ -1200,10 +1229,12 @@ pub fn flush_stdout() {
|
|||
flush()
|
||||
}
|
||||
|
||||
// flush will flush the stdout buffer.
|
||||
pub fn flush() {
|
||||
C.fflush(C.stdout)
|
||||
}
|
||||
|
||||
// mkdir_all will create a valid full path of all directories given in `path`.
|
||||
pub fn mkdir_all(path string) ? {
|
||||
mut p := if path.starts_with(os.path_separator) { os.path_separator } else { '' }
|
||||
path_parts := path.trim_left(os.path_separator).split(os.path_separator)
|
||||
|
|
@ -1242,7 +1273,7 @@ pub fn cache_dir() string {
|
|||
return cdir
|
||||
}
|
||||
|
||||
// tmpdir returns the path to a folder, that is suitable for storing temporary files
|
||||
// temp_dir returns the path to a folder, that is suitable for storing temporary files.
|
||||
pub fn temp_dir() string {
|
||||
mut path := os.getenv('TMPDIR')
|
||||
$if windows {
|
||||
|
|
@ -1271,6 +1302,8 @@ pub fn temp_dir() string {
|
|||
return path
|
||||
}
|
||||
|
||||
// chmod change file access attributes of `path` to `mode`.
|
||||
// Octals like `0o600` can be used.
|
||||
pub fn chmod(path string, mode int) {
|
||||
C.chmod(charptr(path.str), mode)
|
||||
}
|
||||
|
|
@ -1279,7 +1312,7 @@ pub const (
|
|||
wd_at_startup = getwd()
|
||||
)
|
||||
|
||||
// resource_abs_path returns an absolute path, for the given `path`
|
||||
// resource_abs_path returns an absolute path, for the given `path`.
|
||||
// (the path is expected to be relative to the executable program)
|
||||
// See https://discordapp.com/channels/592103645835821068/592294828432424960/630806741373943808
|
||||
// It gives a convenient way to access program resources like images, fonts, sounds and so on,
|
||||
|
|
@ -1293,7 +1326,7 @@ pub fn resource_abs_path(path string) string {
|
|||
return os.real_path(os.join_path(base_path, path))
|
||||
}
|
||||
|
||||
// open tries to open a file for reading and returns back a read-only `File` object
|
||||
// open tries to open a file for reading and returns back a read-only `File` object.
|
||||
pub fn open(path string) ?File {
|
||||
/*
|
||||
$if linux {
|
||||
|
|
@ -1321,7 +1354,7 @@ pub fn open(path string) ?File {
|
|||
}
|
||||
}
|
||||
|
||||
// create creates or opens a file at a specified location and returns a write-only `File` object
|
||||
// create creates or opens a file at a specified location and returns a write-only `File` object.
|
||||
pub fn create(path string) ?File {
|
||||
/*
|
||||
// NB: android/termux/bionic is also a kind of linux,
|
||||
|
|
|
|||
Loading…
Reference in New Issue