mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
959 lines
25 KiB
V
959 lines
25 KiB
V
module os
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#include <sys/stat.h> // #include <signal.h>
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#include <errno.h>
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struct C.dirent {
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d_name [256]char
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}
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fn C.readdir(voidptr) &C.dirent
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fn C.readlink(pathname &char, buf &char, bufsiz size_t) int
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fn C.getline(voidptr, voidptr, voidptr) int
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fn C.ftell(fp voidptr) int
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fn C.sigaction(int, voidptr, int) int
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fn C.open(&char, int, ...int) int
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fn C.fdopen(fd int, mode &char) &C.FILE
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fn C.ferror(stream &C.FILE) int
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fn C.feof(stream &C.FILE) int
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fn C.CopyFile(&u16, &u16, bool) int
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// fn C.lstat(charptr, voidptr) u64
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fn C._wstat64(&char, voidptr) u64
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fn C.chown(&char, int, int) int
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fn C.ftruncate(voidptr, u64) int
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fn C._chsize_s(voidptr, u64) int
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// fn C.proc_pidpath(int, byteptr, int) int
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struct C.stat {
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st_size u64
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st_mode u32
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st_mtime int
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}
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struct C.__stat64 {
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st_size u64
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st_mode u32
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st_mtime int
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}
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struct C.DIR {
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}
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type FN_SA_Handler = fn (sig int)
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struct C.sigaction {
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mut:
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sa_mask int
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sa_sigaction int
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sa_flags int
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sa_handler FN_SA_Handler
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}
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struct C.dirent {
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d_name &byte
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}
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// read_bytes returns all bytes read from file in `path`.
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[manualfree]
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pub fn read_bytes(path string) ?[]byte {
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mut fp := vfopen(path, 'rb') ?
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cseek := C.fseek(fp, 0, C.SEEK_END)
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if cseek != 0 {
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return error('fseek failed')
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}
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fsize := C.ftell(fp)
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if fsize < 0 {
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return error('ftell failed')
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}
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C.rewind(fp)
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mut res := []byte{len: fsize}
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nr_read_elements := int(C.fread(res.data, fsize, 1, fp))
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if nr_read_elements == 0 && fsize > 0 {
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return error('fread failed')
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}
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C.fclose(fp)
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res.trim(nr_read_elements * fsize)
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return res
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}
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// read_file reads the file in `path` and returns the contents.
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pub fn read_file(path string) ?string {
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mode := 'rb'
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mut fp := vfopen(path, mode) ?
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defer {
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C.fclose(fp)
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}
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cseek := C.fseek(fp, 0, C.SEEK_END)
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if cseek != 0 {
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return error('fseek failed')
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}
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fsize := C.ftell(fp)
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if fsize < 0 {
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return error('ftell failed')
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}
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// C.fseek(fp, 0, SEEK_SET) // same as `C.rewind(fp)` below
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C.rewind(fp)
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unsafe {
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mut str := malloc(fsize + 1)
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nelements := int(C.fread(str, 1, fsize, fp))
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is_eof := int(C.feof(fp))
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is_error := int(C.ferror(fp))
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if is_eof == 0 && is_error != 0 {
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free(str)
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return error('fread failed')
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}
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str[nelements] = 0
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if nelements == 0 {
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// It is highly likely that the file was a virtual file from
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// /sys or /proc, with information generated on the fly, so
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// fsize was not reliably reported. Using vstring() here is
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// slower (it calls strlen internally), but will return more
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// consistent results.
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// For example reading from /sys/class/sound/card0/id produces
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// a `PCH\n` string, but fsize is 4096, and otherwise you would
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// get a V string with .len = 4096 and .str = "PCH\n\\000".
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return str.vstring()
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}
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return str.vstring_with_len(nelements)
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}
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}
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// ***************************** OS ops ************************
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//
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// truncate changes the size of the file located in `path` to `len`.
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// Note that changing symbolic links on Windows only works as admin.
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pub fn truncate(path string, len u64) ? {
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fp := C.open(&char(path.str), o_wronly | o_trunc)
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defer {
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C.close(fp)
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}
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if fp < 0 {
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return error_with_code(posix_get_error_msg(C.errno), C.errno)
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}
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$if windows {
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if C._chsize_s(fp, len) != 0 {
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return error_with_code(posix_get_error_msg(C.errno), C.errno)
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}
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} $else {
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if C.ftruncate(fp, len) != 0 {
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return error_with_code(posix_get_error_msg(C.errno), C.errno)
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}
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}
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}
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fn eprintln_unknown_file_size() {
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eprintln('os.file_size() Cannot determine file-size: ' + posix_get_error_msg(C.errno))
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}
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// file_size returns the size of the file located in `path`.
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// If an error occurs it returns 0.
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// Note that use of this on symbolic links on Windows returns always 0.
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pub fn file_size(path string) u64 {
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mut s := C.stat{}
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unsafe {
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$if x64 {
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$if windows {
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mut swin := C.__stat64{}
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if C._wstat64(&char(path.to_wide()), voidptr(&swin)) != 0 {
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eprintln_unknown_file_size()
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return 0
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}
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return swin.st_size
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} $else {
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if C.stat(&char(path.str), &s) != 0 {
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eprintln_unknown_file_size()
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return 0
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}
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return u64(s.st_size)
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}
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}
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$if x32 {
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$if debug {
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println('Using os.file_size() on 32bit systems may not work on big files.')
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}
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$if windows {
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if C._wstat(path.to_wide(), voidptr(&s)) != 0 {
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eprintln_unknown_file_size()
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return 0
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}
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return u64(s.st_size)
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} $else {
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if C.stat(&char(path.str), &s) != 0 {
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eprintln_unknown_file_size()
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return 0
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}
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return u64(s.st_size)
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}
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}
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}
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return 0
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}
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// mv moves files or folders from `src` to `dst`.
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pub fn mv(src string, dst string) ? {
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mut rdst := dst
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if is_dir(rdst) {
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rdst = join_path(rdst.trim_right(path_separator), file_name(src.trim_right(path_separator)))
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}
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$if windows {
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w_src := src.replace('/', '\\')
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w_dst := rdst.replace('/', '\\')
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ret := C._wrename(w_src.to_wide(), w_dst.to_wide())
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if ret != 0 {
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return error_with_code('failed to rename $src to $dst', int(ret))
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}
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} $else {
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ret := C.rename(&char(src.str), &char(rdst.str))
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if ret != 0 {
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return error_with_code('failed to rename $src to $dst', int(ret))
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}
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}
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}
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// cp copies files or folders from `src` to `dst`.
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pub fn cp(src string, dst string) ? {
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$if windows {
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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 $src to $dst', int(result))
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}
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} $else {
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fp_from := C.open(&char(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 $src', int(fp_from))
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}
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fp_to := C.open(&char(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 $dst (fp_to: $fp_to)',
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int(fp_to))
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}
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// TODO use defer{} to close files in case of error or return.
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// Currently there is a C-Error when building.
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mut buf := [1024]byte{}
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mut count := 0
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for {
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count = C.read(fp_from, &buf[0], sizeof(buf))
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if count == 0 {
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break
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}
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if C.write(fp_to, &buf[0], count) < 0 {
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C.close(fp_to)
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C.close(fp_from)
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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(&char(src.str), &from_attr)
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}
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if C.chmod(&char(dst.str), from_attr.st_mode) < 0 {
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C.close(fp_to)
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C.close(fp_from)
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return error_with_code('failed to set permissions for $dst', int(-1))
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}
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C.close(fp_to)
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C.close(fp_from)
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}
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}
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// vfopen returns an opened C file, given its path and open mode.
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// NB: os.vfopen is useful for compatibility with C libraries, that expect `FILE *`.
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// If you write pure V code, os.create or os.open are more convenient.
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pub fn vfopen(path string, mode string) ?&C.FILE {
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if path.len == 0 {
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return error('vfopen called with ""')
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}
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mut fp := voidptr(0)
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$if windows {
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fp = C._wfopen(path.to_wide(), mode.to_wide())
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} $else {
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fp = C.fopen(&char(path.str), &char(mode.str))
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}
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if isnil(fp) {
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return error('failed to open file "$path"')
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} else {
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return fp
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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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pub fn fileno(cfile voidptr) int {
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$if windows {
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return C._fileno(cfile)
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} $else {
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mut cfile_casted := &C.FILE(0) // FILE* cfile_casted = 0;
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cfile_casted = cfile
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// Required on FreeBSD/OpenBSD/NetBSD as stdio.h defines fileno(..) with a macro
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// that performs a field access on its argument without casting from void*.
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return C.fileno(cfile_casted)
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}
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}
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// vpopen system starts the specified command, waits for it to complete, and returns its code.
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fn vpopen(path string) voidptr {
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// *C.FILE {
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$if windows {
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mode := 'rb'
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wpath := path.to_wide()
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return C._wpopen(wpath, mode.to_wide())
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} $else {
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cpath := path.str
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return C.popen(&char(cpath), c'r')
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}
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}
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fn posix_wait4_to_exit_status(waitret int) (int, bool) {
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$if windows {
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return waitret, false
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} $else {
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mut ret := 0
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mut is_signaled := true
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// (see man system, man 2 waitpid: C macro WEXITSTATUS section)
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if C.WIFEXITED(waitret) {
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ret = C.WEXITSTATUS(waitret)
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is_signaled = false
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} else if C.WIFSIGNALED(waitret) {
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ret = C.WTERMSIG(waitret)
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is_signaled = true
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}
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return ret, is_signaled
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}
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}
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// posix_get_error_msg return error code representation in string.
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pub fn posix_get_error_msg(code int) string {
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ptr_text := C.strerror(code) // voidptr?
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if ptr_text == 0 {
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return ''
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}
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return unsafe { tos3(ptr_text) }
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}
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// vpclose will close a file pointer opened with `vpopen`.
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fn vpclose(f voidptr) int {
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$if windows {
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return C._pclose(f)
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} $else {
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ret, _ := posix_wait4_to_exit_status(C.pclose(f))
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return ret
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}
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}
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// system works like `exec`, but only returns a return code.
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pub fn system(cmd string) int {
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// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
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// TODO remove panic
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// panic(';, &&, || and \\n are not allowed in shell commands')
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// }
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mut ret := 0
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$if windows {
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// overcome bug in system & _wsystem (cmd) when first char is quote `"`
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wcmd := if cmd.len > 1 && cmd[0] == `"` && cmd[1] != `"` { '"$cmd"' } else { cmd }
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unsafe {
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ret = C._wsystem(wcmd.to_wide())
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}
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} $else {
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$if ios {
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unsafe {
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arg := [c'/bin/sh', c'-c', &byte(cmd.str), 0]
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pid := 0
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ret = C.posix_spawn(&pid, c'/bin/sh', 0, 0, arg.data, 0)
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status := 0
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ret = C.waitpid(pid, &status, 0)
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if C.WIFEXITED(status) {
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ret = C.WEXITSTATUS(status)
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}
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}
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} $else {
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unsafe {
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ret = C.system(&char(cmd.str))
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}
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}
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}
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if ret == -1 {
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print_c_errno()
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}
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$if !windows {
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pret, is_signaled := posix_wait4_to_exit_status(ret)
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if is_signaled {
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println('Terminated by signal ${ret:2d} (' + sigint_to_signal_name(pret) + ')')
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}
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ret = pret
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}
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return ret
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}
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// exists returns true if `path` (file or directory) exists.
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pub fn exists(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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return C._waccess(p.to_wide(), f_ok) != -1
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} $else {
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return C.access(&char(path.str), f_ok) != -1
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}
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}
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// is_executable returns `true` if `path` is executable.
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pub fn is_executable(path string) bool {
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$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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// i.e. there is no X bit there, the modes can be:
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// 00 Existence only
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// 02 Write-only
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// 04 Read-only
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// 06 Read and write
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p := real_path(path)
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return (exists(p) && p.ends_with('.exe'))
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}
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$if solaris {
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statbuf := C.stat{}
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unsafe {
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if C.stat(&char(path.str), &statbuf) != 0 {
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return false
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}
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}
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return (int(statbuf.st_mode) & (s_ixusr | s_ixgrp | s_ixoth)) != 0
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}
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return C.access(&char(path.str), x_ok) != -1
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}
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// is_writable returns `true` if `path` is writable.
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pub fn is_writable(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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return C._waccess(p.to_wide(), w_ok) != -1
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} $else {
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return C.access(&char(path.str), w_ok) != -1
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}
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}
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// is_readable returns `true` if `path` is readable.
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pub fn is_readable(path string) bool {
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$if windows {
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p := path.replace('/', '\\')
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return C._waccess(p.to_wide(), r_ok) != -1
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} $else {
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return C.access(&char(path.str), r_ok) != -1
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}
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}
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// rm removes file in `path`.
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pub fn rm(path string) ? {
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mut rc := 0
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$if windows {
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rc = C._wremove(path.to_wide())
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} $else {
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rc = C.remove(&char(path.str))
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}
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if rc == -1 {
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return error('Failed to remove "$path": ' + posix_get_error_msg(C.errno))
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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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$if windows {
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rc := C.RemoveDirectory(&char(path.to_wide()))
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if rc == 0 {
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// https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-removedirectorya - 0 is failure
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return error('Failed to remove "$path": ' + posix_get_error_msg(C.errno))
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}
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} $else {
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rc := C.rmdir(&char(path.str))
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if rc == -1 {
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return error(posix_get_error_msg(C.errno))
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}
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}
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}
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// print_c_errno will print the current value of `C.errno`.
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fn print_c_errno() {
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e := C.errno
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se := unsafe { tos_clone(&byte(C.strerror(e))) }
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println('errno=$e err=$se')
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}
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// get_raw_line returns a one-line string from stdin along with '\n' if there is any.
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pub fn get_raw_line() string {
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$if windows {
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unsafe {
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max_line_chars := 256
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buf := malloc(max_line_chars * 2)
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h_input := C.GetStdHandle(C.STD_INPUT_HANDLE)
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mut bytes_read := u32(0)
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if is_atty(0) > 0 {
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x := C.ReadConsole(h_input, buf, max_line_chars * 2, &bytes_read, 0)
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if !x {
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return tos(buf, 0)
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}
|
|
return string_from_wide2(&u16(buf), int(bytes_read))
|
|
}
|
|
mut offset := 0
|
|
for {
|
|
pos := buf + offset
|
|
res := C.ReadFile(h_input, pos, 1, C.LPDWORD(&bytes_read), 0)
|
|
if !res && offset == 0 {
|
|
return tos(buf, 0)
|
|
}
|
|
if !res || bytes_read == 0 {
|
|
break
|
|
}
|
|
if *pos == `\n` || *pos == `\r` {
|
|
offset++
|
|
break
|
|
}
|
|
offset++
|
|
}
|
|
return buf.vstring_with_len(offset)
|
|
}
|
|
} $else {
|
|
max := size_t(0)
|
|
buf := &char(0)
|
|
nr_chars := unsafe { C.getline(&buf, &max, C.stdin) }
|
|
return unsafe { tos(&byte(buf), if nr_chars < 0 { 0 } else { nr_chars }) }
|
|
}
|
|
}
|
|
|
|
// get_raw_stdin will get the raw input from stdin.
|
|
pub fn get_raw_stdin() []byte {
|
|
$if windows {
|
|
unsafe {
|
|
block_bytes := 512
|
|
mut old_size := block_bytes
|
|
mut buf := malloc(block_bytes)
|
|
h_input := C.GetStdHandle(C.STD_INPUT_HANDLE)
|
|
mut bytes_read := 0
|
|
mut offset := 0
|
|
for {
|
|
pos := buf + offset
|
|
res := C.ReadFile(h_input, pos, block_bytes, C.LPDWORD(&bytes_read), 0)
|
|
offset += bytes_read
|
|
if !res {
|
|
break
|
|
}
|
|
new_size := offset + block_bytes + (block_bytes - bytes_read)
|
|
buf = realloc_data(buf, old_size, new_size)
|
|
old_size = new_size
|
|
}
|
|
return array{
|
|
element_size: 1
|
|
data: voidptr(buf)
|
|
len: offset
|
|
cap: offset
|
|
}
|
|
}
|
|
} $else {
|
|
max := size_t(0)
|
|
buf := &char(0)
|
|
nr_chars := unsafe { C.getline(&buf, &max, C.stdin) }
|
|
return array{
|
|
element_size: 1
|
|
data: voidptr(buf)
|
|
len: if nr_chars < 0 { 0 } else { nr_chars }
|
|
cap: int(max)
|
|
}
|
|
}
|
|
}
|
|
|
|
// read_file_array reads an array of `T` values from file `path`.
|
|
pub fn read_file_array<T>(path string) []T {
|
|
a := T{}
|
|
tsize := int(sizeof(a))
|
|
// prepare for reading, get current file size
|
|
mut fp := vfopen(path, 'rb') or { return []T{} }
|
|
C.fseek(fp, 0, C.SEEK_END)
|
|
fsize := C.ftell(fp)
|
|
C.rewind(fp)
|
|
// read the actual data from the file
|
|
len := fsize / tsize
|
|
buf := unsafe { malloc(fsize) }
|
|
nread := C.fread(buf, tsize, len, fp)
|
|
C.fclose(fp)
|
|
return unsafe {
|
|
array{
|
|
element_size: tsize
|
|
data: buf
|
|
len: int(nread)
|
|
cap: len
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn on_segfault(f voidptr) {
|
|
$if windows {
|
|
return
|
|
}
|
|
$if macos {
|
|
C.printf(c'TODO')
|
|
/*
|
|
mut sa := C.sigaction{}
|
|
C.memset(&sa, 0, sizeof(C.sigaction_size))
|
|
C.sigemptyset(&sa.sa_mask)
|
|
sa.sa_sigaction = f
|
|
sa.sa_flags = C.SA_SIGINFO
|
|
C.sigaction(C.SIGSEGV, &sa, 0)
|
|
*/
|
|
}
|
|
}
|
|
|
|
// executable returns the path name of the executable that started the current
|
|
// process.
|
|
[manualfree]
|
|
pub fn executable() string {
|
|
$if linux {
|
|
mut xresult := vcalloc(max_path_len)
|
|
count := C.readlink(c'/proc/self/exe', &char(xresult), max_path_len)
|
|
if count < 0 {
|
|
eprintln('os.executable() failed at reading /proc/self/exe to get exe path')
|
|
return executable_fallback()
|
|
}
|
|
return unsafe { xresult.vstring() }
|
|
}
|
|
$if windows {
|
|
max := 512
|
|
size := max * 2 // max_path_len * sizeof(wchar_t)
|
|
mut result := unsafe { &u16(vcalloc(size)) }
|
|
len := C.GetModuleFileName(0, result, max)
|
|
// determine if the file is a windows symlink
|
|
attrs := C.GetFileAttributesW(result)
|
|
is_set := attrs & 0x400 // FILE_ATTRIBUTE_REPARSE_POINT
|
|
if is_set != 0 { // it's a windows symlink
|
|
// gets handle with GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0
|
|
file := C.CreateFile(result, 0x80000000, 1, 0, 3, 0x80, 0)
|
|
if file != voidptr(-1) {
|
|
final_path := unsafe { &u16(vcalloc(size)) }
|
|
// https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfinalpathnamebyhandlew
|
|
final_len := C.GetFinalPathNameByHandleW(file, final_path, size, 0)
|
|
if final_len < size {
|
|
ret := unsafe { string_from_wide2(final_path, final_len) }
|
|
// remove '\\?\' from beginning (see link above)
|
|
return ret[4..]
|
|
} else {
|
|
eprintln('os.executable() saw that the executable file path was too long')
|
|
}
|
|
}
|
|
C.CloseHandle(file)
|
|
}
|
|
return unsafe { string_from_wide2(result, len) }
|
|
}
|
|
$if macos {
|
|
mut result := vcalloc(max_path_len)
|
|
pid := C.getpid()
|
|
ret := proc_pidpath(pid, result, max_path_len)
|
|
if ret <= 0 {
|
|
eprintln('os.executable() failed at calling proc_pidpath with pid: $pid . proc_pidpath returned $ret ')
|
|
return executable_fallback()
|
|
}
|
|
return unsafe { result.vstring() }
|
|
}
|
|
$if freebsd {
|
|
mut result := vcalloc(max_path_len)
|
|
mib := [1 /* CTL_KERN */, 14 /* KERN_PROC */, 12 /* KERN_PROC_PATHNAME */, -1]
|
|
size := max_path_len
|
|
unsafe { C.sysctl(mib.data, 4, result, &size, 0, 0) }
|
|
return unsafe { result.vstring() }
|
|
}
|
|
// "Sadly there is no way to get the full path of the executed file in OpenBSD."
|
|
$if openbsd {
|
|
}
|
|
$if solaris {
|
|
}
|
|
$if haiku {
|
|
}
|
|
$if netbsd {
|
|
mut result := vcalloc(max_path_len)
|
|
count := C.readlink(c'/proc/curproc/exe', &char(result), max_path_len)
|
|
if count < 0 {
|
|
eprintln('os.executable() failed at reading /proc/curproc/exe to get exe path')
|
|
return executable_fallback()
|
|
}
|
|
return unsafe { result.vstring_with_len(count) }
|
|
}
|
|
$if dragonfly {
|
|
mut result := vcalloc(max_path_len)
|
|
count := C.readlink(c'/proc/curproc/file', &char(result), max_path_len)
|
|
if count < 0 {
|
|
eprintln('os.executable() failed at reading /proc/curproc/file to get exe path')
|
|
return executable_fallback()
|
|
}
|
|
return unsafe { result.vstring_with_len(count) }
|
|
}
|
|
return executable_fallback()
|
|
}
|
|
|
|
// is_dir returns a `bool` indicating whether the given `path` is a directory.
|
|
pub fn is_dir(path string) bool {
|
|
$if windows {
|
|
w_path := path.replace('/', '\\')
|
|
attr := C.GetFileAttributesW(w_path.to_wide())
|
|
if attr == u32(C.INVALID_FILE_ATTRIBUTES) {
|
|
return false
|
|
}
|
|
if int(attr) & C.FILE_ATTRIBUTE_DIRECTORY != 0 {
|
|
return true
|
|
}
|
|
return false
|
|
} $else {
|
|
statbuf := C.stat{}
|
|
if unsafe { C.stat(&char(path.str), &statbuf) } != 0 {
|
|
return false
|
|
}
|
|
// ref: https://code.woboq.org/gcc/include/sys/stat.h.html
|
|
val := int(statbuf.st_mode) & s_ifmt
|
|
return val == s_ifdir
|
|
}
|
|
}
|
|
|
|
// is_link returns a boolean indicating whether `path` is a link.
|
|
pub fn is_link(path string) bool {
|
|
$if windows {
|
|
path_ := path.replace('/', '\\')
|
|
attr := C.GetFileAttributesW(path_.to_wide())
|
|
return int(attr) != int(C.INVALID_FILE_ATTRIBUTES) && (attr & 0x400) != 0
|
|
} $else {
|
|
statbuf := C.stat{}
|
|
if C.lstat(&char(path.str), &statbuf) != 0 {
|
|
return false
|
|
}
|
|
return int(statbuf.st_mode) & s_ifmt == s_iflnk
|
|
}
|
|
}
|
|
|
|
// chdir changes the current working directory to the new directory in `path`.
|
|
pub fn chdir(path string) {
|
|
$if windows {
|
|
C._wchdir(path.to_wide())
|
|
} $else {
|
|
_ = C.chdir(&char(path.str))
|
|
}
|
|
}
|
|
|
|
// getwd returns the absolute path of the current directory.
|
|
pub fn getwd() string {
|
|
$if windows {
|
|
max := 512 // max_path_len * sizeof(wchar_t)
|
|
unsafe {
|
|
buf := &u16(vcalloc(max * 2))
|
|
if C._wgetcwd(buf, max) == 0 {
|
|
free(buf)
|
|
return ''
|
|
}
|
|
return string_from_wide(buf)
|
|
}
|
|
} $else {
|
|
buf := vcalloc(max_path_len)
|
|
unsafe {
|
|
if C.getcwd(&char(buf), max_path_len) == 0 {
|
|
free(buf)
|
|
return ''
|
|
}
|
|
return buf.vstring()
|
|
}
|
|
}
|
|
}
|
|
|
|
// real_path returns the full absolute path for fpath, with all relative ../../, symlinks and so on resolved.
|
|
// See http://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
|
|
// Also https://insanecoding.blogspot.com/2007/11/pathmax-simply-isnt.html
|
|
// and https://insanecoding.blogspot.com/2007/11/implementing-realpath-in-c.html
|
|
// NB: this particular rabbit hole is *deep* ...
|
|
[manualfree]
|
|
pub fn real_path(fpath string) string {
|
|
mut fullpath := &byte(0)
|
|
mut res := ''
|
|
$if windows {
|
|
// GetFullPathName doesn't work with symbolic links,
|
|
// so if it is not a file, get full path
|
|
fullpath = unsafe { &u16(vcalloc(max_path_len * 2)) }
|
|
// TODO: check errors if path len is not enough
|
|
ret := C.GetFullPathName(fpath.to_wide(), max_path_len, fullpath, 0)
|
|
if ret == 0 {
|
|
unsafe { free(fullpath) }
|
|
return fpath.clone()
|
|
}
|
|
res = unsafe { string_from_wide(fullpath) }
|
|
} $else {
|
|
fullpath = vcalloc(max_path_len)
|
|
ret := &char(C.realpath(&char(fpath.str), &char(fullpath)))
|
|
if ret == 0 {
|
|
unsafe { free(fullpath) }
|
|
return fpath.clone()
|
|
}
|
|
res = unsafe { fullpath.vstring() }
|
|
}
|
|
return normalize_drive_letter(res)
|
|
}
|
|
|
|
[direct_array_access; manualfree]
|
|
fn normalize_drive_letter(path string) string {
|
|
// normalize_drive_letter is needed, because a path like c:\nv\.bin (note the small `c`)
|
|
// in %PATH is NOT recognized by cmd.exe (and probably other programs too)...
|
|
// Capital drive letters do work fine.
|
|
$if !windows {
|
|
return path
|
|
}
|
|
if path.len > 2 && path[0] >= `a` && path[0] <= `z` && path[1] == `:`
|
|
&& path[2] == path_separator[0] {
|
|
unsafe {
|
|
x := &path.str[0]
|
|
(*x) = *x - 32
|
|
}
|
|
}
|
|
return path
|
|
}
|
|
|
|
// fork will fork the current system process and return the pid of the fork.
|
|
pub fn fork() int {
|
|
mut pid := -1
|
|
$if !windows {
|
|
pid = C.fork()
|
|
}
|
|
$if windows {
|
|
panic('os.fork not supported in windows') // TODO
|
|
}
|
|
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 {
|
|
pid = C.wait(0)
|
|
}
|
|
$if windows {
|
|
panic('os.wait not supported in windows') // TODO
|
|
}
|
|
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;
|
|
unsafe { C.stat(&char(path.str), &attr) }
|
|
// # stat(path.str, &attr);
|
|
return attr.st_mtime
|
|
// # return attr.st_mtime ;
|
|
}
|
|
|
|
// flush will flush the stdout buffer.
|
|
pub fn flush() {
|
|
C.fflush(C.stdout)
|
|
}
|
|
|
|
// chmod change file access attributes of `path` to `mode`.
|
|
// Octals like `0o600` can be used.
|
|
pub fn chmod(path string, mode int) {
|
|
if C.chmod(&char(path.str), mode) != 0 {
|
|
panic('chmod failed: ' + posix_get_error_msg(C.errno))
|
|
}
|
|
}
|
|
|
|
// chown changes the owner and group attributes of `path` to `owner` and `group`.
|
|
pub fn chown(path string, owner int, group int) ? {
|
|
$if windows {
|
|
return error('os.chown() not implemented for Windows')
|
|
} $else {
|
|
if C.chown(&char(path.str), owner, group) != 0 {
|
|
return error_with_code(posix_get_error_msg(C.errno), C.errno)
|
|
}
|
|
}
|
|
}
|
|
|
|
// open_append opens `path` file for appending.
|
|
pub fn open_append(path string) ?File {
|
|
mut file := File{}
|
|
$if windows {
|
|
wpath := path.replace('/', '\\').to_wide()
|
|
mode := 'ab'
|
|
file = File{
|
|
cfile: C._wfopen(wpath, mode.to_wide())
|
|
}
|
|
} $else {
|
|
cpath := path.str
|
|
file = File{
|
|
cfile: C.fopen(&char(cpath), c'ab')
|
|
}
|
|
}
|
|
if isnil(file.cfile) {
|
|
return error('failed to create(append) file "$path"')
|
|
}
|
|
file.is_opened = true
|
|
return file
|
|
}
|
|
|
|
// execvp - loads and executes a new child process, *in place* of the current process.
|
|
// The child process executable is located in `cmdpath`.
|
|
// The arguments, that will be passed to it are in `args`.
|
|
// NB: this function will NOT return when successfull, since
|
|
// the child process will take control over execution.
|
|
pub fn execvp(cmdpath string, args []string) ? {
|
|
mut cargs := []&char{}
|
|
cargs << &char(cmdpath.str)
|
|
for i in 0 .. args.len {
|
|
cargs << &char(args[i].str)
|
|
}
|
|
cargs << &char(0)
|
|
mut res := int(0)
|
|
$if windows {
|
|
res = C._execvp(&char(cmdpath.str), cargs.data)
|
|
} $else {
|
|
res = C.execvp(&char(cmdpath.str), cargs.data)
|
|
}
|
|
if res == -1 {
|
|
return error_with_code(posix_get_error_msg(C.errno), C.errno)
|
|
}
|
|
// just in case C._execvp returned ... that happens on windows ...
|
|
exit(res)
|
|
}
|
|
|
|
// execve - loads and executes a new child process, *in place* of the current process.
|
|
// The child process executable is located in `cmdpath`.
|
|
// The arguments, that will be passed to it are in `args`.
|
|
// You can pass environment variables to through `envs`.
|
|
// NB: this function will NOT return when successfull, since
|
|
// the child process will take control over execution.
|
|
pub fn execve(cmdpath string, args []string, envs []string) ? {
|
|
mut cargv := []&char{}
|
|
mut cenvs := []&char{}
|
|
cargv << &char(cmdpath.str)
|
|
for i in 0 .. args.len {
|
|
cargv << &char(args[i].str)
|
|
}
|
|
for i in 0 .. envs.len {
|
|
cenvs << &char(envs[i].str)
|
|
}
|
|
cargv << &char(0)
|
|
cenvs << &char(0)
|
|
mut res := int(0)
|
|
$if windows {
|
|
res = C._execve(&char(cmdpath.str), cargv.data, cenvs.data)
|
|
} $else {
|
|
res = C.execve(&char(cmdpath.str), cargv.data, cenvs.data)
|
|
}
|
|
// NB: normally execve does not return at all.
|
|
// If it returns, then something went wrong...
|
|
if res == -1 {
|
|
return error_with_code(posix_get_error_msg(C.errno), C.errno)
|
|
}
|
|
}
|