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-rw-r--r--v_windows/v/vlib/os/os.c.v1010
1 files changed, 1010 insertions, 0 deletions
diff --git a/v_windows/v/vlib/os/os.c.v b/v_windows/v/vlib/os/os.c.v
new file mode 100644
index 0000000..12369d0
--- /dev/null
+++ b/v_windows/v/vlib/os/os.c.v
@@ -0,0 +1,1010 @@
+module os
+
+#include <sys/stat.h> // #include <signal.h>
+#include <errno.h>
+
+pub const (
+ args = []string{}
+)
+
+struct C.dirent {
+ d_name [256]char
+}
+
+fn C.readdir(voidptr) &C.dirent
+
+fn C.readlink(pathname &char, buf &char, bufsiz size_t) int
+
+fn C.getline(voidptr, voidptr, voidptr) int
+
+fn C.ftell(fp voidptr) i64
+
+fn C.sigaction(int, voidptr, int) int
+
+fn C.open(&char, int, ...int) int
+
+fn C.fdopen(fd int, mode &char) &C.FILE
+
+fn C.ferror(stream &C.FILE) int
+
+fn C.feof(stream &C.FILE) int
+
+fn C.CopyFile(&u16, &u16, bool) int
+
+// fn C.lstat(charptr, voidptr) u64
+
+fn C._wstat64(&u16, voidptr) u64
+
+fn C.chown(&char, int, int) int
+
+fn C.ftruncate(voidptr, u64) int
+
+fn C._chsize_s(voidptr, u64) int
+
+// fn C.proc_pidpath(int, byteptr, int) int
+struct C.stat {
+ st_size u64
+ st_mode u32
+ st_mtime int
+}
+
+struct C.__stat64 {
+ st_size u64
+ st_mode u32
+ st_mtime int
+}
+
+struct C.DIR {
+}
+
+type FN_SA_Handler = fn (sig int)
+
+struct C.sigaction {
+mut:
+ sa_mask int
+ sa_sigaction int
+ sa_flags int
+ sa_handler FN_SA_Handler
+}
+
+struct C.dirent {
+ d_name &byte
+}
+
+// read_bytes returns all bytes read from file in `path`.
+[manualfree]
+pub fn read_bytes(path string) ?[]byte {
+ mut fp := vfopen(path, 'rb') ?
+ defer {
+ C.fclose(fp)
+ }
+ cseek := C.fseek(fp, 0, C.SEEK_END)
+ if cseek != 0 {
+ return error('fseek failed')
+ }
+ fsize := C.ftell(fp)
+ if fsize < 0 {
+ return error('ftell failed')
+ }
+ C.rewind(fp)
+ mut res := []byte{len: int(fsize)}
+ nr_read_elements := int(C.fread(res.data, fsize, 1, fp))
+ if nr_read_elements == 0 && fsize > 0 {
+ return error('fread failed')
+ }
+ res.trim(nr_read_elements * int(fsize))
+ return res
+}
+
+// read_file reads the file in `path` and returns the contents.
+pub fn read_file(path string) ?string {
+ mode := 'rb'
+ mut fp := vfopen(path, mode) ?
+ defer {
+ C.fclose(fp)
+ }
+ cseek := C.fseek(fp, 0, C.SEEK_END)
+ if cseek != 0 {
+ return error('fseek failed')
+ }
+ fsize := C.ftell(fp)
+ if fsize < 0 {
+ return error('ftell failed')
+ }
+ // C.fseek(fp, 0, SEEK_SET) // same as `C.rewind(fp)` below
+ C.rewind(fp)
+ unsafe {
+ mut str := malloc_noscan(int(fsize) + 1)
+ nelements := int(C.fread(str, 1, fsize, fp))
+ is_eof := int(C.feof(fp))
+ is_error := int(C.ferror(fp))
+ if is_eof == 0 && is_error != 0 {
+ free(str)
+ return error('fread failed')
+ }
+ str[nelements] = 0
+ if nelements == 0 {
+ // It is highly likely that the file was a virtual file from
+ // /sys or /proc, with information generated on the fly, so
+ // fsize was not reliably reported. Using vstring() here is
+ // slower (it calls strlen internally), but will return more
+ // consistent results.
+ // For example reading from /sys/class/sound/card0/id produces
+ // a `PCH\n` string, but fsize is 4096, and otherwise you would
+ // get a V string with .len = 4096 and .str = "PCH\n\\000".
+ return str.vstring()
+ }
+ return str.vstring_with_len(nelements)
+ }
+}
+
+// ***************************** OS ops ************************
+//
+// truncate changes the size of the file located in `path` to `len`.
+// Note that changing symbolic links on Windows only works as admin.
+pub fn truncate(path string, len u64) ? {
+ fp := C.open(&char(path.str), o_wronly | o_trunc, 0)
+ defer {
+ C.close(fp)
+ }
+ if fp < 0 {
+ return error_with_code(posix_get_error_msg(C.errno), C.errno)
+ }
+ $if windows {
+ if C._chsize_s(fp, len) != 0 {
+ return error_with_code(posix_get_error_msg(C.errno), C.errno)
+ }
+ } $else {
+ if C.ftruncate(fp, len) != 0 {
+ return error_with_code(posix_get_error_msg(C.errno), C.errno)
+ }
+ }
+}
+
+fn eprintln_unknown_file_size() {
+ eprintln('os.file_size() Cannot determine file-size: ' + posix_get_error_msg(C.errno))
+}
+
+// file_size returns the size of the file located in `path`.
+// If an error occurs it returns 0.
+// Note that use of this on symbolic links on Windows returns always 0.
+pub fn file_size(path string) u64 {
+ mut s := C.stat{}
+ unsafe {
+ $if x64 {
+ $if windows {
+ mut swin := C.__stat64{}
+ if C._wstat64(path.to_wide(), voidptr(&swin)) != 0 {
+ eprintln_unknown_file_size()
+ return 0
+ }
+ return swin.st_size
+ } $else {
+ if C.stat(&char(path.str), &s) != 0 {
+ eprintln_unknown_file_size()
+ return 0
+ }
+ return u64(s.st_size)
+ }
+ }
+ $if x32 {
+ $if debug {
+ eprintln('Using os.file_size() on 32bit systems may not work on big files.')
+ }
+ $if windows {
+ if C._wstat(path.to_wide(), voidptr(&s)) != 0 {
+ eprintln_unknown_file_size()
+ return 0
+ }
+ return u64(s.st_size)
+ } $else {
+ if C.stat(&char(path.str), &s) != 0 {
+ eprintln_unknown_file_size()
+ return 0
+ }
+ return u64(s.st_size)
+ }
+ }
+ }
+ return 0
+}
+
+// mv moves files or folders from `src` to `dst`.
+pub fn mv(src string, dst string) ? {
+ mut rdst := dst
+ if is_dir(rdst) {
+ rdst = join_path(rdst.trim_right(path_separator), file_name(src.trim_right(path_separator)))
+ }
+ $if windows {
+ w_src := src.replace('/', '\\')
+ w_dst := rdst.replace('/', '\\')
+ ret := C._wrename(w_src.to_wide(), w_dst.to_wide())
+ if ret != 0 {
+ return error_with_code('failed to rename $src to $dst', int(ret))
+ }
+ } $else {
+ ret := C.rename(&char(src.str), &char(rdst.str))
+ if ret != 0 {
+ return error_with_code('failed to rename $src to $dst', int(ret))
+ }
+ }
+}
+
+// cp copies files or folders from `src` to `dst`.
+pub fn cp(src string, dst string) ? {
+ $if windows {
+ w_src := src.replace('/', '\\')
+ w_dst := dst.replace('/', '\\')
+ if C.CopyFile(w_src.to_wide(), w_dst.to_wide(), false) == 0 {
+ result := C.GetLastError()
+ return error_with_code('failed to copy $src to $dst', int(result))
+ }
+ } $else {
+ fp_from := C.open(&char(src.str), C.O_RDONLY, 0)
+ if fp_from < 0 { // Check if file opened
+ return error_with_code('cp: failed to open $src', int(fp_from))
+ }
+ fp_to := C.open(&char(dst.str), C.O_WRONLY | C.O_CREAT | C.O_TRUNC, C.S_IWUSR | C.S_IRUSR)
+ if fp_to < 0 { // Check if file opened (permissions problems ...)
+ C.close(fp_from)
+ return error_with_code('cp (permission): failed to write to $dst (fp_to: $fp_to)',
+ int(fp_to))
+ }
+ // TODO use defer{} to close files in case of error or return.
+ // Currently there is a C-Error when building.
+ mut buf := [1024]byte{}
+ mut count := 0
+ for {
+ count = C.read(fp_from, &buf[0], sizeof(buf))
+ if count == 0 {
+ break
+ }
+ if C.write(fp_to, &buf[0], count) < 0 {
+ C.close(fp_to)
+ C.close(fp_from)
+ return error_with_code('cp: failed to write to $dst', int(-1))
+ }
+ }
+ from_attr := C.stat{}
+ unsafe {
+ C.stat(&char(src.str), &from_attr)
+ }
+ if C.chmod(&char(dst.str), from_attr.st_mode) < 0 {
+ C.close(fp_to)
+ C.close(fp_from)
+ return error_with_code('failed to set permissions for $dst', int(-1))
+ }
+ C.close(fp_to)
+ C.close(fp_from)
+ }
+}
+
+// vfopen returns an opened C file, given its path and open mode.
+// NB: os.vfopen is useful for compatibility with C libraries, that expect `FILE *`.
+// If you write pure V code, os.create or os.open are more convenient.
+pub fn vfopen(path string, mode string) ?&C.FILE {
+ if path.len == 0 {
+ return error('vfopen called with ""')
+ }
+ mut fp := voidptr(0)
+ $if windows {
+ fp = C._wfopen(path.to_wide(), mode.to_wide())
+ } $else {
+ fp = C.fopen(&char(path.str), &char(mode.str))
+ }
+ if isnil(fp) {
+ return error('failed to open file "$path"')
+ } else {
+ return fp
+ }
+}
+
+// fileno returns the file descriptor of an opened C file.
+pub fn fileno(cfile voidptr) int {
+ $if windows {
+ return C._fileno(cfile)
+ } $else {
+ mut cfile_casted := &C.FILE(0) // FILE* cfile_casted = 0;
+ cfile_casted = cfile
+ // Required on FreeBSD/OpenBSD/NetBSD as stdio.h defines fileno(..) with a macro
+ // that performs a field access on its argument without casting from void*.
+ return C.fileno(cfile_casted)
+ }
+}
+
+// vpopen system starts the specified command, waits for it to complete, and returns its code.
+fn vpopen(path string) voidptr {
+ // *C.FILE {
+ $if windows {
+ mode := 'rb'
+ wpath := path.to_wide()
+ return C._wpopen(wpath, mode.to_wide())
+ } $else {
+ cpath := path.str
+ return C.popen(&char(cpath), c'r')
+ }
+}
+
+fn posix_wait4_to_exit_status(waitret int) (int, bool) {
+ $if windows {
+ return waitret, false
+ } $else {
+ mut ret := 0
+ mut is_signaled := true
+ // (see man system, man 2 waitpid: C macro WEXITSTATUS section)
+ if C.WIFEXITED(waitret) {
+ ret = C.WEXITSTATUS(waitret)
+ is_signaled = false
+ } else if C.WIFSIGNALED(waitret) {
+ ret = C.WTERMSIG(waitret)
+ is_signaled = true
+ }
+ return ret, is_signaled
+ }
+}
+
+// posix_get_error_msg return error code representation in string.
+pub fn posix_get_error_msg(code int) string {
+ ptr_text := C.strerror(code) // voidptr?
+ if ptr_text == 0 {
+ return ''
+ }
+ return unsafe { tos3(ptr_text) }
+}
+
+// vpclose will close a file pointer opened with `vpopen`.
+fn vpclose(f voidptr) int {
+ $if windows {
+ return C._pclose(f)
+ } $else {
+ ret, _ := posix_wait4_to_exit_status(C.pclose(f))
+ return ret
+ }
+}
+
+// system works like `exec`, but only returns a return code.
+pub fn system(cmd string) int {
+ // if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
+ // TODO remove panic
+ // panic(';, &&, || and \\n are not allowed in shell commands')
+ // }
+ mut ret := 0
+ $if windows {
+ // overcome bug in system & _wsystem (cmd) when first char is quote `"`
+ wcmd := if cmd.len > 1 && cmd[0] == `"` && cmd[1] != `"` { '"$cmd"' } else { cmd }
+ unsafe {
+ ret = C._wsystem(wcmd.to_wide())
+ }
+ } $else {
+ $if ios {
+ unsafe {
+ arg := [c'/bin/sh', c'-c', &byte(cmd.str), 0]
+ pid := 0
+ ret = C.posix_spawn(&pid, c'/bin/sh', 0, 0, arg.data, 0)
+ status := 0
+ ret = C.waitpid(pid, &status, 0)
+ if C.WIFEXITED(status) {
+ ret = C.WEXITSTATUS(status)
+ }
+ }
+ } $else {
+ unsafe {
+ ret = C.system(&char(cmd.str))
+ }
+ }
+ }
+ if ret == -1 {
+ print_c_errno()
+ }
+ $if !windows {
+ pret, is_signaled := posix_wait4_to_exit_status(ret)
+ if is_signaled {
+ println('Terminated by signal ${ret:2d} (' + sigint_to_signal_name(pret) + ')')
+ }
+ ret = pret
+ }
+ return ret
+}
+
+// exists returns true if `path` (file or directory) exists.
+pub fn exists(path string) bool {
+ $if windows {
+ p := path.replace('/', '\\')
+ return C._waccess(p.to_wide(), f_ok) != -1
+ } $else {
+ return C.access(&char(path.str), f_ok) != -1
+ }
+}
+
+// is_executable returns `true` if `path` is executable.
+pub fn is_executable(path string) bool {
+ $if windows {
+ // NB: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/access-waccess?view=vs-2019
+ // i.e. there is no X bit there, the modes can be:
+ // 00 Existence only
+ // 02 Write-only
+ // 04 Read-only
+ // 06 Read and write
+ p := real_path(path)
+ return (exists(p) && p.ends_with('.exe'))
+ }
+ $if solaris {
+ statbuf := C.stat{}
+ unsafe {
+ if C.stat(&char(path.str), &statbuf) != 0 {
+ return false
+ }
+ }
+ return (int(statbuf.st_mode) & (s_ixusr | s_ixgrp | s_ixoth)) != 0
+ }
+ return C.access(&char(path.str), x_ok) != -1
+}
+
+// is_writable returns `true` if `path` is writable.
+pub fn is_writable(path string) bool {
+ $if windows {
+ p := path.replace('/', '\\')
+ return C._waccess(p.to_wide(), w_ok) != -1
+ } $else {
+ return C.access(&char(path.str), w_ok) != -1
+ }
+}
+
+// is_readable returns `true` if `path` is readable.
+pub fn is_readable(path string) bool {
+ $if windows {
+ p := path.replace('/', '\\')
+ return C._waccess(p.to_wide(), r_ok) != -1
+ } $else {
+ return C.access(&char(path.str), r_ok) != -1
+ }
+}
+
+// rm removes file in `path`.
+pub fn rm(path string) ? {
+ mut rc := 0
+ $if windows {
+ rc = C._wremove(path.to_wide())
+ } $else {
+ rc = C.remove(&char(path.str))
+ }
+ if rc == -1 {
+ return error('Failed to remove "$path": ' + posix_get_error_msg(C.errno))
+ }
+ // C.unlink(path.cstr())
+}
+
+// rmdir removes a specified directory.
+pub fn rmdir(path string) ? {
+ $if windows {
+ rc := C.RemoveDirectory(path.to_wide())
+ if rc == 0 {
+ // https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-removedirectorya - 0 is failure
+ return error('Failed to remove "$path": ' + posix_get_error_msg(C.errno))
+ }
+ } $else {
+ rc := C.rmdir(&char(path.str))
+ if rc == -1 {
+ return error(posix_get_error_msg(C.errno))
+ }
+ }
+}
+
+// print_c_errno will print the current value of `C.errno`.
+fn print_c_errno() {
+ e := C.errno
+ se := unsafe { tos_clone(&byte(C.strerror(e))) }
+ println('errno=$e err=$se')
+}
+
+// get_raw_line returns a one-line string from stdin along with '\n' if there is any.
+pub fn get_raw_line() string {
+ $if windows {
+ unsafe {
+ max_line_chars := 256
+ buf := malloc_noscan(max_line_chars * 2)
+ h_input := C.GetStdHandle(C.STD_INPUT_HANDLE)
+ mut bytes_read := u32(0)
+ if is_atty(0) > 0 {
+ x := C.ReadConsole(h_input, buf, max_line_chars * 2, &bytes_read, 0)
+ if !x {
+ return tos(buf, 0)
+ }
+ 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_noscan(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_noscan(int(fsize)) }
+ nread := C.fread(buf, tsize, len, fp)
+ C.fclose(fp)
+ return unsafe {
+ array{
+ element_size: tsize
+ data: buf
+ len: int(nread)
+ cap: int(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_noscan(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_noscan(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_noscan(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_noscan(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_noscan(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_noscan(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_noscan(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) ? {
+ ret := $if windows { C._wchdir(path.to_wide()) } $else { C.chdir(&char(path.str)) }
+ if ret == -1 {
+ return error_with_code(posix_get_error_msg(C.errno), C.errno)
+ }
+}
+
+// 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_noscan(max * 2))
+ if C._wgetcwd(buf, max) == 0 {
+ free(buf)
+ return ''
+ }
+ return string_from_wide(buf)
+ }
+ } $else {
+ buf := vcalloc_noscan(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 res := ''
+ $if windows {
+ size := max_path_len * 2
+ // gets handle with GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0
+ // use C.CreateFile(fpath.to_wide(), 0x80000000, 1, 0, 3, 0x80, 0) instead of get_file_handle
+ // try to open the file to get symbolic link path
+ file := C.CreateFile(fpath.to_wide(), 0x80000000, 1, 0, 3, 0x80, 0)
+ if file != voidptr(-1) {
+ mut fullpath := unsafe { &u16(vcalloc_noscan(size)) }
+ // https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfinalpathnamebyhandlew
+ final_len := C.GetFinalPathNameByHandleW(file, fullpath, size, 0)
+ C.CloseHandle(file)
+ if final_len < size {
+ rt := unsafe { string_from_wide2(fullpath, final_len) }
+ res = rt[4..]
+ } else {
+ unsafe { free(fullpath) }
+ eprintln('os.real_path() saw that the file path was too long')
+ return fpath.clone()
+ }
+ } else {
+ // if it is not a file C.CreateFile doesn't gets a file handle, use GetFullPath instead
+ mut fullpath := unsafe { &u16(vcalloc_noscan(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 {
+ mut fullpath := vcalloc_noscan(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() }
+ }
+ unsafe { normalize_drive_letter(res) }
+ return res
+}
+
+[direct_array_access; manualfree; unsafe]
+fn normalize_drive_letter(path string) {
+ $if !windows {
+ return
+ }
+ // 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 path.len > 2 && path[0] >= `a` && path[0] <= `z` && path[1] == `:`
+ && path[2] == path_separator[0] {
+ unsafe {
+ x := &path.str[0]
+ (*x) = *x - 32
+ }
+ }
+}
+
+// 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 {
+ return error_with_code('chmod failed: ' + posix_get_error_msg(C.errno), 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, cmdargs []string) ? {
+ mut cargs := []&char{}
+ cargs << &char(cmdpath.str)
+ for i in 0 .. cmdargs.len {
+ cargs << &char(cmdargs[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, cmdargs []string, envs []string) ? {
+ mut cargv := []&char{}
+ mut cenvs := []&char{}
+ cargv << &char(cmdpath.str)
+ for i in 0 .. cmdargs.len {
+ cargv << &char(cmdargs[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)
+ }
+}
+
+// is_atty returns 1 if the `fd` file descriptor is open and refers to a terminal
+pub fn is_atty(fd int) int {
+ $if windows {
+ mut mode := u32(0)
+ osfh := voidptr(C._get_osfhandle(fd))
+ C.GetConsoleMode(osfh, voidptr(&mode))
+ return int(mode)
+ } $else {
+ return C.isatty(fd)
+ }
+}
+
+// write_file_array writes the data in `buffer` to a file in `path`.
+pub fn write_file_array(path string, buffer array) ? {
+ mut f := create(path) ?
+ unsafe { f.write_full_buffer(buffer.data, size_t(buffer.len * buffer.element_size)) ? }
+ f.close()
+}
+
+pub fn glob(patterns ...string) ?[]string {
+ mut matches := []string{}
+ for pattern in patterns {
+ native_glob_pattern(pattern, mut matches) ?
+ }
+ matches.sort()
+ return matches
+}