v/vlib/os/os.v

1132 lines
23 KiB
V
Raw Normal View History

2019-06-23 04:21:30 +02:00
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
2019-06-22 20:20:28 +02:00
module os
2019-11-01 17:29:51 +01:00
import filepath
2019-10-15 17:08:46 +02:00
2019-12-19 22:29:37 +01:00
#include <sys/stat.h> // #include <signal.h>
#include <errno.h>
2019-08-22 22:19:31 +02:00
/*
struct dirent {
2019-10-26 00:55:16 +02:00
d_ino int
d_off int
2019-08-22 22:19:31 +02:00
d_reclen u16
d_type byte
d_name [256]byte
}
*/
2019-08-17 01:09:36 +02:00
struct C.dirent {
2019-08-22 22:19:31 +02:00
d_name byteptr
}
2019-08-17 01:09:36 +02:00
2019-08-22 22:19:31 +02:00
fn C.readdir(voidptr) C.dirent
2019-08-17 01:09:36 +02:00
2019-12-30 05:23:54 +01:00
2019-10-24 11:36:57 +02:00
pub const (
2019-06-22 20:20:28 +02:00
args = []string
MAX_PATH = 4096
2019-06-22 20:20:28 +02:00
)
2019-10-24 11:47:21 +02:00
pub struct File {
2019-12-19 22:29:37 +01:00
cfile voidptr // Using void* instead of FILE*
2019-12-31 08:53:53 +01:00
fd int
2019-12-03 11:08:57 +01:00
mut:
2019-12-01 10:50:13 +01:00
opened bool
2019-06-22 20:20:28 +02:00
}
struct FileInfo {
name string
size int
}
2019-06-27 17:48:49 +02:00
struct C.stat {
2019-12-19 22:29:37 +01:00
st_size int
st_mode u32
2019-08-22 22:19:31 +02:00
st_mtime int
}
struct C.DIR {}
2019-12-19 22:29:37 +01:00
// struct C.dirent {
// d_name byteptr
// }
2019-06-27 17:48:49 +02:00
struct C.sigaction {
mut:
2019-12-19 22:29:37 +01:00
sa_mask int
sa_sigaction int
2019-12-19 22:29:37 +01:00
sa_flags int
2019-06-27 17:48:49 +02:00
}
fn C.getline(voidptr, voidptr, voidptr) int
2019-12-19 22:29:37 +01:00
fn C.ftell(fp voidptr) int
2019-12-19 22:29:37 +01:00
2019-11-28 09:46:52 +01:00
fn C.getenv(byteptr) &char
2019-12-19 22:29:37 +01:00
2019-06-27 17:48:49 +02:00
fn C.sigaction(int, voidptr, int)
2019-11-25 02:35:41 +01:00
2019-12-01 10:50:13 +01:00
pub fn (f File) is_opened() bool {
return f.opened
}
2019-11-02 20:37:29 +01:00
// read_bytes reads an amount of bytes from the beginning of the file
pub fn (f &File) read_bytes(size int) []byte {
2019-10-26 19:21:07 +02:00
return f.read_bytes_at(size, 0)
}
// read_bytes_at reads an amount of bytes at the given position in the file
pub fn (f &File) read_bytes_at(size, pos int) []byte {
2019-12-19 22:29:37 +01:00
mut arr := [`0`].repeat(size)
2019-10-26 19:21:07 +02:00
C.fseek(f.cfile, pos, C.SEEK_SET)
2019-11-28 09:46:52 +01:00
nreadbytes := C.fread(arr.data, 1, size, f.cfile)
2019-10-26 19:21:07 +02:00
C.fseek(f.cfile, 0, C.SEEK_SET)
2019-11-30 10:37:34 +01:00
return arr[0..nreadbytes]
}
2019-11-19 07:53:52 +01:00
pub fn read_bytes(path string) ?[]byte {
mut fp := vfopen(path, 'rb')
if isnil(fp) {
return error('failed to open file "$path"')
}
C.fseek(fp, 0, C.SEEK_END)
fsize := C.ftell(fp)
C.rewind(fp)
2019-12-19 22:29:37 +01:00
mut res := [`0`].repeat(fsize)
2019-12-18 06:22:52 +01:00
nr_read_elements := C.fread(res.data, fsize, 1, fp)
2019-11-19 07:53:52 +01:00
C.fclose(fp)
2019-12-18 06:22:52 +01:00
return res[0..nr_read_elements * fsize]
2019-11-19 07:53:52 +01:00
}
2019-06-22 20:20:28 +02:00
// read_file reads the file in `path` and returns the contents.
2019-08-22 22:19:31 +02:00
pub fn read_file(path string) ?string {
2019-07-24 12:16:45 +02:00
mode := 'rb'
mut fp := vfopen(path, mode)
if isnil(fp) {
return error('failed to open file "$path"')
}
2019-08-22 22:19:31 +02:00
C.fseek(fp, 0, C.SEEK_END)
fsize := C.ftell(fp)
2019-07-21 12:22:41 +02:00
// C.fseek(fp, 0, SEEK_SET) // same as `C.rewind(fp)` below
C.rewind(fp)
mut str := malloc(fsize + 1)
C.fread(str, fsize, 1, fp)
C.fclose(fp)
str[fsize] = 0
2019-12-19 22:29:37 +01:00
return string(str,fsize)
}
// file_size returns the size of the file located in `path`.
2019-06-22 20:20:28 +02:00
pub fn file_size(path string) int {
mut s := C.stat{}
2019-07-24 12:16:45 +02:00
$if windows {
2019-11-16 00:30:50 +01:00
C._wstat(path.to_wide(), voidptr(&s))
2019-07-24 12:16:45 +02:00
} $else {
2019-12-01 08:33:26 +01:00
C.stat(charptr(path.str), &s)
2019-07-24 12:16:45 +02:00
}
2019-06-27 17:48:49 +02:00
return s.st_size
2019-06-22 20:20:28 +02:00
}
2019-06-25 20:41:46 +02:00
pub fn mv(old, new string) {
2019-07-24 12:16:45 +02:00
$if windows {
C._wrename(old.to_wide(), new.to_wide())
} $else {
2019-12-01 08:33:26 +01:00
C.rename(charptr(old.str), charptr(new.str))
2019-07-24 12:16:45 +02:00
}
}
2019-06-25 20:41:46 +02:00
2019-11-02 20:37:29 +01:00
fn C.CopyFile(&u32, &u32, int) int
// TODO implement actual cp for linux
pub fn cp(old, new string) ?bool {
2019-10-31 22:57:16 +01:00
$if windows {
2019-11-02 20:37:29 +01:00
_old := old.replace('/', '\\')
_new := new.replace('/', '\\')
C.CopyFile(_old.to_wide(), _new.to_wide(), false)
result := C.GetLastError()
if result == 0 {
return true
2019-12-19 22:29:37 +01:00
}
else {
2019-11-02 20:37:29 +01:00
return error_with_code('failed to copy $old to $new', int(result))
}
} $else {
2019-10-31 22:57:16 +01:00
os.system('cp $old $new')
2019-11-02 20:37:29 +01:00
return true // TODO make it return true or error when cp for linux is implemented
}
2019-10-31 22:57:16 +01:00
}
2019-12-19 22:29:37 +01:00
pub fn cp_r(osource_path, odest_path string, overwrite bool) ?bool {
source_path := os.realpath(osource_path)
dest_path := os.realpath(odest_path)
if !os.exists(source_path) {
2019-12-19 22:29:37 +01:00
return error("Source path doesn\'t exist")
2019-11-06 21:05:35 +01:00
}
2019-12-19 22:29:37 +01:00
// single file copy
2019-11-06 21:05:35 +01:00
if !os.is_dir(source_path) {
2019-12-23 11:09:22 +01:00
adjasted_path := if os.is_dir(dest_path) { filepath.join(dest_path,filepath.filename(source_path)) } else { dest_path }
if os.exists(adjasted_path) {
if overwrite {
2019-11-19 00:25:55 +01:00
os.rm(adjasted_path)
}
2019-11-19 00:25:55 +01:00
else {
return error('Destination file path already exist')
}
2019-11-06 21:05:35 +01:00
}
2019-12-21 23:41:42 +01:00
os.cp(source_path, adjasted_path) or {
2019-12-19 22:29:37 +01:00
return error(err)
}
2019-11-06 21:05:35 +01:00
return true
}
if !os.is_dir(dest_path) {
return error('Destination path is not a valid directory')
}
2019-12-21 23:41:42 +01:00
files := os.ls(source_path) or {
2019-12-19 22:29:37 +01:00
return error(err)
}
2019-11-06 21:05:35 +01:00
for file in files {
2019-12-19 22:29:37 +01:00
sp := filepath.join(source_path,file)
dp := filepath.join(dest_path,file)
2019-11-06 21:05:35 +01:00
if os.is_dir(sp) {
2019-12-21 23:41:42 +01:00
os.mkdir(dp) or {
2019-12-19 22:29:37 +01:00
panic(err)
}
2019-11-06 21:05:35 +01:00
}
2019-12-21 23:41:42 +01:00
cp_r(sp, dp, overwrite) or {
2019-11-06 21:05:35 +01:00
os.rmdir(dp)
2019-11-09 20:05:44 +01:00
panic(err)
2019-11-06 21:05:35 +01:00
}
}
return true
}
// mv_by_cp first copies the source file, and if it is copied successfully, deletes the source file.
// mv_by_cp may be used when you are not sure that the source and target are on the same mount/partition.
pub fn mv_by_cp(source string, target string) ?bool {
2019-12-21 23:41:42 +01:00
os.cp(source, target) or {
2019-12-19 22:29:37 +01:00
return error(err)
}
os.rm(source)
return true
}
2019-11-06 21:05:35 +01:00
fn vfopen(path, mode string) *C.FILE {
$if windows {
return C._wfopen(path.to_wide(), mode.to_wide())
} $else {
2019-12-01 08:33:26 +01:00
return C.fopen(charptr(path.str), charptr(mode.str))
}
2019-11-29 17:14:26 +01:00
}
// read_lines reads the file in `path` into an array of lines.
2019-11-19 00:25:55 +01:00
pub fn read_lines(path string) ?[]string {
mut res := []string
mut buf_len := 1024
mut buf := malloc(buf_len)
2019-07-24 12:16:45 +02:00
mode := 'rb'
mut fp := vfopen(path, mode)
if isnil(fp) {
2019-11-19 00:25:55 +01:00
return error('read_lines() failed to open file "$path"')
}
mut buf_index := 0
for C.fgets(buf + buf_index, buf_len - buf_index, fp) != 0 {
2019-09-15 14:36:05 +02:00
len := vstrlen(buf)
if len == buf_len - 1 && buf[len - 1] != 10 {
buf_len *= 2
buf = C.realloc(buf, buf_len)
if isnil(buf) {
2019-11-19 00:25:55 +01:00
return error('could not reallocate the read buffer')
}
buf_index = len
continue
}
if buf[len - 1] == 10 || buf[len - 1] == 13 {
buf[len - 1] = `\0`
}
if len > 1 && buf[len - 2] == 13 {
buf[len - 2] = `\0`
}
res << tos_clone(buf)
buf_index = 0
}
C.fclose(fp)
return res
2019-06-22 20:20:28 +02:00
}
2019-11-19 00:25:55 +01:00
fn read_ulines(path string) ?[]ustring {
2019-12-21 23:41:42 +01:00
lines := read_lines(path) or {
2019-11-19 00:25:55 +01:00
return err
2019-11-29 17:14:26 +01:00
}
2019-06-22 20:20:28 +02:00
// mut ulines := new_array(0, lines.len, sizeof(ustring))
mut ulines := []ustring
for myline in lines {
// ulines[i] = ustr
ulines << myline.ustring()
}
return ulines
}
pub fn open_append(path string) ?File {
mut file := File{}
2019-07-24 12:16:45 +02:00
$if windows {
wpath := path.replace('/', '\\').to_wide()
mode := 'ab'
2019-12-19 22:29:37 +01:00
file = File{
2019-07-24 12:16:45 +02:00
cfile: C._wfopen(wpath, mode.to_wide())
}
} $else {
2019-08-22 22:19:31 +02:00
cpath := path.str
2019-12-19 22:29:37 +01:00
file = File{
2019-12-01 08:33:26 +01:00
cfile: C.fopen(charptr(cpath), 'ab')
2019-07-24 12:16:45 +02:00
}
2019-06-22 20:20:28 +02:00
}
if isnil(file.cfile) {
2019-07-24 12:16:45 +02:00
return error('failed to create(append) file "$path"')
2019-06-22 20:20:28 +02:00
}
2019-12-01 10:50:13 +01:00
file.opened = true
2019-08-22 22:19:31 +02:00
return file
2019-06-22 20:20:28 +02:00
}
/*
2019-12-01 10:50:13 +01:00
pub fn (f mut File) write_bytes_at(data voidptr, size, pos int) {
$if linux {
}
$else {
2019-08-22 22:19:31 +02:00
C.fseek(f.cfile, pos, C.SEEK_SET)
2019-06-22 20:20:28 +02:00
C.fwrite(data, 1, size, f.cfile)
2019-08-22 22:19:31 +02:00
C.fseek(f.cfile, 0, C.SEEK_END)
}
2019-06-22 20:20:28 +02:00
}
*/
2019-06-22 20:20:28 +02:00
2019-12-01 10:50:13 +01:00
pub fn (f mut File) flush() {
2019-12-19 22:29:37 +01:00
if !f.opened {
return
}
2019-07-13 02:11:11 +02:00
C.fflush(f.cfile)
}
// system starts the specified command, waits for it to complete, and returns its code.
2019-12-19 22:29:37 +01:00
fn vpopen(path string) voidptr {
// *C.FILE {
2019-06-22 20:20:28 +02:00
$if windows {
2019-07-24 12:16:45 +02:00
mode := 'rb'
wpath := path.to_wide()
return C._wpopen(wpath, mode.to_wide())
2019-12-19 22:29:37 +01:00
} $else {
2019-07-24 12:16:45 +02:00
cpath := path.str
2019-06-22 20:20:28 +02:00
return C.popen(cpath, 'r')
}
}
fn posix_wait4_to_exit_status(waitret int) (int,bool) {
$if windows {
2019-12-19 22:29:37 +01:00
return waitret,false
} $else {
mut ret := 0
mut is_signaled := true
// (see man system, man 2 waitpid: C macro WEXITSTATUS section)
2019-12-19 22:29:37 +01:00
if C.WIFEXITED(waitret) {
ret = C.WEXITSTATUS(waitret)
is_signaled = false
2019-12-19 22:29:37 +01:00
}
else if C.WIFSIGNALED(waitret) {
ret = C.WTERMSIG(waitret)
is_signaled = true
}
2019-12-19 22:29:37 +01:00
return ret,is_signaled
}
}
fn vpclose(f voidptr) int {
$if windows {
2019-12-07 20:42:13 +01:00
return C._pclose(f)
2019-12-19 22:29:37 +01:00
} $else {
ret,_ := posix_wait4_to_exit_status(C.pclose(f))
return ret
}
}
2019-10-24 20:58:28 +02:00
pub struct Result {
2019-08-22 22:19:31 +02:00
pub:
exit_code int
2019-12-19 22:29:37 +01:00
output string
// stderr string // TODO
2019-08-22 22:19:31 +02:00
}
// `system` works like `exec()`, but only returns a return code.
pub fn system(cmd string) int {
2019-12-19 22:29:37 +01:00
// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
// TODO remove panic
// panic(';, &&, || and \\n are not allowed in shell commands')
// }
2019-12-07 13:51:00 +01:00
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 }
ret = C._wsystem(wcmd.to_wide())
} $else {
2019-08-22 22:19:31 +02:00
ret = C.system(cmd.str)
}
if ret == -1 {
print_c_errno()
}
$if !windows {
2019-12-19 22:29:37 +01:00
pret,is_signaled := posix_wait4_to_exit_status(ret)
if is_signaled {
2019-12-19 22:29:37 +01:00
println('Terminated by signal ${ret:2d} (' + sigint_to_signal_name(pret) + ')')
}
ret = pret
}
return ret
2019-06-22 20:20:28 +02:00
}
pub fn sigint_to_signal_name(si int) string {
// POSIX signals:
match si {
2019-12-19 22:29:37 +01:00
1 {
return 'SIGHUP'
}
2 {
return 'SIGINT'
}
3 {
return 'SIGQUIT'
}
4 {
return 'SIGILL'
}
6 {
return 'SIGABRT'
}
8 {
return 'SIGFPE'
}
9 {
return 'SIGKILL'
}
11 {
return 'SIGSEGV'
}
13 {
return 'SIGPIPE'
}
14 {
return 'SIGALRM'
}
15 {
return 'SIGTERM'
}
else {}
}
$if linux {
// From `man 7 signal` on linux:
match si {
2019-12-19 22:29:37 +01:00
30, 10, 16 {
return 'SIGUSR1'
}
31, 12, 17 {
return 'SIGUSR2'
}
20, 17, 18 {
return 'SIGCHLD'
}
19, 18, 25 {
return 'SIGCONT'
}
17, 19, 23 {
return 'SIGSTOP'
}
18, 20, 24 {
return 'SIGTSTP'
}
21, 21, 26 {
return 'SIGTTIN'
}
22, 22, 27 {
return 'SIGTTOU'
}
// /////////////////////////////
5 {
return 'SIGTRAP'
}
7 {
return 'SIGBUS'
}
else {}
}
}
return 'unknown'
}
2019-06-22 20:20:28 +02:00
// `getenv` returns the value of the environment variable named by the key.
2019-11-29 17:14:26 +01:00
pub fn getenv(key string) string {
2019-07-24 12:16:45 +02:00
$if windows {
s := C._wgetenv(key.to_wide())
2019-11-28 09:46:52 +01:00
if s == 0 {
2019-07-24 12:16:45 +02:00
return ''
}
return string_from_wide(s)
} $else {
2019-11-28 09:46:52 +01:00
s := C.getenv(key.str)
if s == 0 {
2019-07-24 12:16:45 +02:00
return ''
}
2019-11-28 09:46:52 +01:00
// NB: C.getenv *requires* that the result be copied.
2019-12-19 22:29:37 +01:00
return cstring_to_vstring(byteptr(s))
2019-06-22 20:20:28 +02:00
}
}
2019-06-27 13:51:03 +02:00
pub fn setenv(name string, value string, overwrite bool) int {
$if windows {
format := '$name=$value'
if overwrite {
return C._putenv(format.str)
}
return -1
2019-11-28 09:46:52 +01:00
} $else {
return C.setenv(name.str, value.str, overwrite)
2019-08-22 22:19:31 +02:00
}
2019-06-27 13:51:03 +02:00
}
pub fn unsetenv(name string) int {
$if windows {
2019-11-29 17:14:26 +01:00
format := '${name}='
return C._putenv(format.str)
2019-11-28 09:46:52 +01:00
} $else {
return C.unsetenv(name.str)
2019-08-22 22:19:31 +02:00
}
2019-06-27 13:51:03 +02:00
}
const (
F_OK = 0
X_OK = 1
W_OK = 2
R_OK = 4
)
// exists returns true if `path` exists.
pub fn exists(path string) bool {
$if windows {
p := path.replace('/', '\\')
return C._waccess(p.to_wide(), F_OK) != -1
2019-07-24 12:16:45 +02:00
} $else {
return C.access(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 := os.realpath( path )
return ( os.exists( p ) && p.ends_with('.exe') )
} $else {
return C.access(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(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(path.str, R_OK) != -1
}
2019-06-22 20:20:28 +02:00
}
[deprecated]
pub fn file_exists(_path string) bool {
panic('use os.exists(path) instead of os.file_exists(path)')
}
// rm removes file in `path`.
2019-06-22 20:20:28 +02:00
pub fn rm(path string) {
2019-07-24 12:16:45 +02:00
$if windows {
C._wremove(path.to_wide())
2019-12-19 22:29:37 +01:00
} $else {
2019-07-24 12:16:45 +02:00
C.remove(path.str)
}
// C.unlink(path.cstr())
2019-06-22 20:20:28 +02:00
}
// rmdir removes a specified directory.
pub fn rmdir(path string) {
$if !windows {
2019-11-29 17:14:26 +01:00
C.rmdir(path.str)
2019-12-19 22:29:37 +01:00
} $else {
2019-07-24 12:16:45 +02:00
C.RemoveDirectory(path.to_wide())
}
2019-06-22 20:20:28 +02:00
}
pub fn rmdir_recursive(path string) {
items := os.ls(path) or {
panic(err)
}
for item in items {
if os.is_dir(filepath.join(path,item)) {
rmdir_recursive(filepath.join(path,item))
}
os.rm(filepath.join(path,item))
}
os.rmdir(path)
}
pub fn is_dir_empty(path string) bool {
items := os.ls(path) or {
panic(err)
}
return items.len == 0
}
2019-06-22 20:20:28 +02:00
fn print_c_errno() {
e := C.errno
se := tos_clone(byteptr(C.strerror(C.errno)))
println('errno=$e err=$se')
2019-06-22 20:20:28 +02:00
}
2019-12-23 11:09:22 +01:00
[deprecated]
pub fn ext(path string) string {
2019-12-23 11:09:22 +01:00
println('Use filepath.ext')
return filepath.ext(path)
2019-06-26 11:28:06 +02:00
}
2019-12-23 11:09:22 +01:00
[deprecated]
2019-07-16 01:57:03 +02:00
pub fn dir(path string) string {
2019-12-23 11:09:22 +01:00
println('Use filepath.dir')
return filepath.dir(path)
}
2019-12-23 11:09:22 +01:00
[deprecated]
2019-06-22 20:20:28 +02:00
pub fn basedir(path string) string {
2019-12-23 11:09:22 +01:00
println('Use filepath.basedir')
return filepath.basedir(path)
2019-06-22 20:20:28 +02:00
}
2019-12-23 11:09:22 +01:00
[deprecated]
2019-06-22 20:20:28 +02:00
pub fn filename(path string) string {
2019-12-23 11:09:22 +01:00
println('Use filepath.filename')
return filepath.filename(path)
2019-06-22 20:20:28 +02:00
}
2019-08-22 22:19:31 +02:00
// get_line returns a one-line string from stdin
2019-06-22 20:20:28 +02:00
pub fn get_line() string {
2019-12-19 22:29:37 +01:00
str := get_raw_line()
2019-09-15 18:07:40 +02:00
$if windows {
return str.trim_right('\r\n')
2019-12-19 22:29:37 +01:00
} $else {
2019-09-15 18:07:40 +02:00
return str.trim_right('\n')
}
2019-06-22 20:20:28 +02:00
}
// get_raw_line returns a one-line string from stdin along with '\n' if there is any
pub fn get_raw_line() string {
2019-12-19 22:29:37 +01:00
$if windows {
max_line_chars := 256
buf := malloc(max_line_chars * 2)
h_input := C.GetStdHandle(STD_INPUT_HANDLE)
mut bytes_read := 0
2019-12-19 22:29:37 +01:00
if is_atty(0) > 0 {
C.ReadConsole(h_input, buf, max_line_chars * 2, &bytes_read, 0)
return string_from_wide2(&u16(buf), bytes_read)
}
mut offset := 0
for {
pos := buf + offset
res := C.ReadFile(h_input, pos, 1, &bytes_read, 0)
if !res || bytes_read == 0 {
break
}
if *pos == `\n` || *pos == `\r` {
offset++
break
}
offset++
2019-12-19 22:29:37 +01:00
}
return string(buf, offset)
2019-12-19 22:29:37 +01:00
} $else {
max := size_t(256)
buf := charptr(malloc(int(max)))
nr_chars := C.getline(&buf, &max, stdin)
if nr_chars == 0 {
return ''
}
return string(byteptr(buf),nr_chars)
}
}
2019-07-24 18:14:13 +02:00
pub fn get_lines() []string {
2019-12-19 22:29:37 +01:00
mut line := ''
mut inputstr := []string
for {
line = get_line()
if (line.len <= 0) {
break
}
line = line.trim_space()
inputstr << line
}
return inputstr
2019-07-24 18:14:13 +02:00
}
pub fn get_lines_joined() string {
2019-10-26 19:21:07 +02:00
mut line := ''
mut inputstr := ''
for {
line = get_line()
if line.len <= 0 {
break
}
line = line.trim_space()
inputstr += line
}
return inputstr
2019-07-24 18:14:13 +02:00
}
2019-10-26 19:21:07 +02:00
// user_os returns current user operating system name.
2019-06-22 20:20:28 +02:00
pub fn user_os() string {
$if linux {
return 'linux'
}
2019-12-03 14:29:24 +01:00
$if macos {
2019-06-22 20:20:28 +02:00
return 'mac'
}
$if windows {
return 'windows'
}
2019-07-15 17:24:40 +02:00
$if freebsd {
2019-08-22 22:19:31 +02:00
return 'freebsd'
}
2019-07-21 12:22:41 +02:00
$if openbsd {
2019-08-22 22:19:31 +02:00
return 'openbsd'
}
2019-07-21 12:22:41 +02:00
$if netbsd {
2019-08-22 22:19:31 +02:00
return 'netbsd'
}
2019-07-21 12:22:41 +02:00
$if dragonfly {
2019-08-22 22:19:31 +02:00
return 'dragonfly'
}
2019-12-19 22:29:37 +01:00
$if android {
return 'android'
}
2019-09-26 23:30:41 +02:00
$if solaris {
return 'solaris'
}
2019-12-03 09:26:47 +01:00
$if haiku {
return 'haiku'
}
2019-06-22 20:20:28 +02:00
return 'unknown'
}
// home_dir returns path to user's home directory.
2019-06-22 20:20:28 +02:00
pub fn home_dir() string {
mut home := os.getenv('HOME')
$if windows {
home = os.getenv('HOMEDRIVE')
2019-07-12 19:05:22 +02:00
if home.len == 0 {
home = os.getenv('SYSTEMDRIVE')
}
mut homepath := os.getenv('HOMEPATH')
if homepath.len == 0 {
homepath = '\\Users\\' + os.getenv('USERNAME')
}
home += homepath
2019-06-22 20:20:28 +02:00
}
2019-10-12 21:31:05 +02:00
home += path_separator
2019-06-22 20:20:28 +02:00
return home
}
2019-08-22 22:19:31 +02:00
// write_file writes `text` data to a file in `path`.
2019-06-22 20:20:28 +02:00
pub fn write_file(path, text string) {
2019-12-21 23:41:42 +01:00
mut f := os.create(path) or {
2019-08-22 22:19:31 +02:00
return
}
2019-07-01 23:24:19 +02:00
f.write(text)
2019-06-22 20:20:28 +02:00
f.close()
}
2019-12-04 21:53:11 +01:00
// clear clears current terminal screen.
pub fn clear() {
$if !windows {
C.printf('\x1b[2J')
C.printf('\x1b[H')
}
}
2019-12-03 11:08:57 +01:00
pub fn on_segfault(f voidptr) {
$if windows {
return
}
2019-12-03 14:29:24 +01:00
$if macos {
mut sa := C.sigaction{}
2019-06-27 17:48:49 +02:00
C.memset(&sa, 0, sizeof(sigaction))
C.sigemptyset(&sa.sa_mask)
sa.sa_sigaction = f
2019-08-22 22:19:31 +02:00
sa.sa_flags = C.SA_SIGINFO
C.sigaction(C.SIGSEGV, &sa, 0)
}
}
2019-09-15 18:07:40 +02:00
fn C.getpid() int
2019-11-22 17:00:56 +01:00
2019-12-19 22:29:37 +01:00
fn C.proc_pidpath(int, byteptr, int) int
fn C.readlink() int
2019-11-22 17:00:56 +01:00
// executable returns the path name of the executable that started the current
// process.
2019-07-15 23:22:29 +02:00
pub fn executable() string {
$if linux {
2019-11-28 09:46:52 +01:00
mut result := calloc(MAX_PATH)
2019-11-22 17:00:56 +01:00
count := C.readlink('/proc/self/exe', result, MAX_PATH)
if count < 0 {
2019-11-28 09:46:52 +01:00
eprintln('os.executable() failed at reading /proc/self/exe to get exe path')
return os.args[0]
}
2019-11-28 09:46:52 +01:00
return string(result)
}
$if windows {
max := 512
2019-12-19 22:29:37 +01:00
mut result := &u16(calloc(max * 2)) // MAX_PATH * sizeof(wchar_t)
len := C.GetModuleFileName(0, result, max)
2019-07-24 12:16:45 +02:00
return string_from_wide2(result, len)
}
2019-12-03 14:29:24 +01:00
$if macos {
2019-11-28 09:46:52 +01:00
mut result := calloc(MAX_PATH)
2019-08-22 22:19:31 +02:00
pid := C.getpid()
2019-12-19 22:29:37 +01:00
ret := proc_pidpath(pid, result, MAX_PATH)
if ret <= 0 {
2019-11-28 09:46:52 +01:00
eprintln('os.executable() failed at calling proc_pidpath with pid: $pid . proc_pidpath returned $ret ')
return os.args[0]
2019-08-22 22:19:31 +02:00
}
return string(result)
}
2019-07-16 16:19:52 +02:00
$if freebsd {
2019-11-28 09:46:52 +01:00
mut result := calloc(MAX_PATH)
2019-12-19 22:29:37 +01:00
mib := [1/* CTL_KERN */, 14/* KERN_PROC */, 12/* KERN_PROC_PATHNAME */, -1]
2019-08-22 22:19:31 +02:00
size := MAX_PATH
C.sysctl(mib.data, 4, result, &size, 0, 0)
return string(result)
}
$if openbsd {
2019-08-22 22:19:31 +02:00
// "Sadly there is no way to get the full path of the executed file in OpenBSD."
// lol
return os.args[0]
}
$if solaris {}
$if haiku {}
$if netbsd {
2019-11-28 09:46:52 +01:00
mut result := calloc(MAX_PATH)
2020-01-05 20:13:35 +01:00
count := C.readlink('/proc/curproc/exe', result, MAX_PATH)
if count < 0 {
2019-11-28 09:46:52 +01:00
eprintln('os.executable() failed at reading /proc/curproc/exe to get exe path')
return os.args[0]
}
2019-12-19 22:29:37 +01:00
return string(result,count)
2019-08-22 22:19:31 +02:00
}
$if dragonfly {
2019-11-28 09:46:52 +01:00
mut result := calloc(MAX_PATH)
2020-01-05 20:13:35 +01:00
count := C.readlink('/proc/curproc/file', result, MAX_PATH)
if count < 0 {
2019-11-28 09:46:52 +01:00
eprintln('os.executable() failed at reading /proc/curproc/file to get exe path')
return os.args[0]
}
2019-12-19 22:29:37 +01:00
return string(result,count)
2019-08-22 22:19:31 +02:00
}
2019-09-26 23:23:27 +02:00
return os.args[0]
}
[deprecated]
pub fn dir_exists(path string) bool {
panic('use os.is_dir()')
2019-12-19 22:29:37 +01:00
// return false
}
2019-10-26 19:21:07 +02:00
// is_dir returns a boolean indicating whether the given path is a directory.
pub fn is_dir(path string) bool {
$if windows {
_path := path.replace('/', '\\')
attr := C.GetFileAttributesW(_path.to_wide())
2019-12-05 09:25:55 +01:00
if attr == u32(C.INVALID_FILE_ATTRIBUTES) {
return false
}
2019-12-04 21:53:11 +01:00
if int(attr) & C.FILE_ATTRIBUTE_DIRECTORY != 0 {
return true
}
return false
2019-12-19 22:29:37 +01:00
} $else {
statbuf := C.stat{}
2019-12-04 21:53:11 +01:00
if C.stat(path.str, &statbuf) != 0 {
return false
}
2019-07-31 10:32:00 +02:00
// ref: https://code.woboq.org/gcc/include/sys/stat.h.html
2019-12-04 21:53:11 +01:00
return int(statbuf.st_mode) & S_IFMT == S_IFDIR
2019-08-22 22:19:31 +02:00
}
}
2019-12-04 21:53:11 +01:00
// is_link returns a boolean indicating whether the given path is a link.
pub fn is_link(path string) bool {
2019-12-04 22:14:23 +01:00
$if windows {
return false // TODO
} $else {
statbuf := C.stat{}
2019-12-04 22:14:23 +01:00
if C.lstat(path.str, &statbuf) != 0 {
return false
}
return int(statbuf.st_mode) & S_IFMT == S_IFLNK
2019-12-04 21:53:11 +01:00
}
}
2019-10-26 19:21:07 +02:00
// chdir changes the current working directory to the new directory path.
2019-06-30 16:11:55 +02:00
pub fn chdir(path string) {
$if windows {
2019-07-24 12:16:45 +02:00
C._wchdir(path.to_wide())
2019-12-19 22:29:37 +01:00
} $else {
C.chdir(path.str)
2019-08-22 22:19:31 +02:00
}
}
2019-10-26 19:21:07 +02:00
// getwd returns the absolute path name of the current directory.
2019-11-29 17:14:26 +01:00
pub fn getwd() string {
$if windows {
max := 512 // MAX_PATH * sizeof(wchar_t)
2019-12-19 22:29:37 +01:00
buf := &u16(calloc(max * 2))
if C._wgetcwd(buf, max) == 0 {
return ''
}
2019-07-24 12:16:45 +02:00
return string_from_wide(buf)
2019-12-19 22:29:37 +01:00
} $else {
buf := calloc(512)
if C.getcwd(buf, 512) == 0 {
return ''
}
2019-07-24 12:16:45 +02:00
return string(buf)
}
}
// 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
2019-12-19 22:29:37 +01:00
// and https://insanecoding.blogspot.com/2007/11/implementing-realpath-in-c.html
// NB: this particular rabbit hole is *deep* ...
pub fn realpath(fpath string) string {
2019-11-28 09:46:52 +01:00
mut fullpath := calloc(MAX_PATH)
2019-12-01 08:33:26 +01:00
mut ret := charptr(0)
$if windows {
2019-11-28 09:46:52 +01:00
ret = C._fullpath(fullpath, fpath.str, MAX_PATH)
2019-11-23 18:56:22 +01:00
if ret == 0 {
return fpath
2019-11-29 17:14:26 +01:00
}
2019-11-28 09:46:52 +01:00
} $else {
ret = C.realpath(fpath.str, fullpath)
2019-11-14 23:07:38 +01:00
if ret == 0 {
return fpath
2019-11-29 17:14:26 +01:00
}
}
2019-11-28 09:46:52 +01:00
return string(fullpath)
}
2019-08-22 22:19:31 +02:00
// walk_ext returns a recursive list of all file paths ending with `ext`.
2019-08-16 14:05:11 +02:00
pub fn walk_ext(path, ext string) []string {
2019-08-22 22:19:31 +02:00
if !os.is_dir(path) {
2019-11-14 07:18:07 +01:00
return []
2019-08-22 22:19:31 +02:00
}
2019-12-21 23:41:42 +01:00
mut files := os.ls(path) or {
2019-12-19 22:29:37 +01:00
panic(err)
}
2019-08-22 22:19:31 +02:00
mut res := []string
2019-12-19 22:29:37 +01:00
separator := if path.ends_with(path_separator) { '' } else { path_separator }
2019-08-16 14:05:11 +02:00
for i, file in files {
if file.starts_with('.') {
2019-08-22 22:19:31 +02:00
continue
}
p := path + separator + file
2019-12-30 05:23:54 +01:00
if os.is_dir(p) && !os.is_link(p) {
2019-08-22 22:19:31 +02:00
res << walk_ext(p, ext)
}
2019-08-16 14:05:11 +02:00
else if file.ends_with(ext) {
2019-08-22 22:19:31 +02:00
res << p
}
}
return res
}
2019-10-24 14:17:09 +02:00
// walk recursively traverse 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, fnc fn(path string)) {
if !os.is_dir(path) {
return
}
2019-12-21 23:41:42 +01:00
mut files := os.ls(path) or {
2019-12-19 22:29:37 +01:00
panic(err)
}
2019-10-24 14:17:09 +02:00
for file in files {
p := path + os.path_separator + file
2019-12-30 05:23:54 +01:00
if os.is_dir(p) && !os.is_link(p) {
2019-10-24 14:17:09 +02:00
walk(p, fnc)
}
else if os.exists(p) {
2019-10-24 14:17:09 +02:00
fnc(p)
}
}
return
}
2019-07-02 22:13:23 +02:00
pub fn signal(signum int, handler voidptr) {
C.signal(signum, handler)
}
2019-09-15 18:07:40 +02:00
fn C.fork() int
2019-12-19 22:29:37 +01:00
2019-09-15 18:07:40 +02:00
fn C.wait() int
2019-12-19 22:29:37 +01:00
2019-07-14 04:18:54 +02:00
pub fn fork() int {
2019-11-16 00:30:50 +01:00
mut pid := -1
$if !windows {
2019-11-16 00:30:50 +01:00
pid = C.fork()
}
2019-11-16 00:30:50 +01:00
$if windows {
panic('os.fork not supported in windows') // TODO
}
return pid
2019-07-14 04:18:54 +02:00
}
pub fn wait() int {
2019-11-16 00:30:50 +01:00
mut pid := -1
$if !windows {
pid = C.wait(0)
}
$if !windows {
2019-11-16 00:30:50 +01:00
panic('os.wait not supported in windows') // TODO
}
2019-11-16 00:30:50 +01:00
return pid
2019-07-14 04:18:54 +02:00
}
2019-07-07 21:46:21 +02:00
pub fn file_last_mod_unix(path string) int {
attr := C.stat{}
2019-12-19 22:29:37 +01:00
// # struct stat attr;
2019-08-22 22:19:31 +02:00
C.stat(path.str, &attr)
2019-12-19 22:29:37 +01:00
// # stat(path.str, &attr);
2019-08-22 22:19:31 +02:00
return attr.st_mtime
2019-12-19 22:29:37 +01:00
// # return attr.st_mtime ;
2019-07-07 21:46:21 +02:00
}
2019-08-22 22:19:31 +02:00
pub fn log(s string) {
println('os.log: ' + s)
}
2019-07-24 16:15:21 +02:00
pub fn flush_stdout() {
C.fflush(stdout)
2019-08-22 22:19:31 +02:00
}
2019-07-24 16:15:21 +02:00
pub fn mkdir_all(path string) {
2019-10-12 21:31:05 +02:00
mut p := if path.starts_with(os.path_separator) { os.path_separator } else { '' }
for subdir in path.split(os.path_separator) {
p += subdir + os.path_separator
if !os.is_dir(p) {
2019-12-21 23:41:42 +01:00
os.mkdir(p) or {
2019-12-19 22:29:37 +01:00
panic(err)
}
}
}
}
2019-10-15 17:08:46 +02:00
pub fn join(base string, dirs ...string) string {
2019-11-01 17:29:51 +01:00
println('use filepath.join')
2019-12-19 22:29:37 +01:00
return filepath.join(base,dirs)
2019-10-15 17:08:46 +02:00
}
// cachedir returns the path to a *writable* user specific folder, suitable for writing non-essential data.
pub fn cachedir() string {
// See: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
// There is a single base directory relative to which user-specific non-essential
// (cached) data should be written. This directory is defined by the environment
// variable $XDG_CACHE_HOME.
// $XDG_CACHE_HOME defines the base directory relative to which user specific
// non-essential data files should be stored. If $XDG_CACHE_HOME is either not set
// or empty, a default equal to $HOME/.cache should be used.
$if !windows {
xdg_cache_home := os.getenv('XDG_CACHE_HOME')
if xdg_cache_home != '' {
return xdg_cache_home
}
}
cdir := os.home_dir() + '.cache'
if !os.is_dir(cdir) && !os.is_link(cdir) {
os.mkdir(cdir) or {
panic(err)
}
}
return cdir
}
// tmpdir returns the path to a folder, that is suitable for storing temporary files
pub fn tmpdir() string {
mut path := os.getenv('TMPDIR')
$if windows {
if path == '' {
// TODO see Qt's implementation?
// https://doc.qt.io/qt-5/qdir.html#tempPath
// https://github.com/qt/qtbase/blob/e164d61ca8263fc4b46fdd916e1ea77c7dd2b735/src/corelib/io/qfilesystemengine_win.cpp#L1275
path = os.getenv('TEMP')
2019-12-19 22:29:37 +01:00
if path == '' {
path = os.getenv('TMP')
}
if path == '' {
path = 'C:/tmp'
}
}
}
if path == '' {
path = os.cachedir()
}
2019-12-30 05:25:26 +01:00
if path == '' {
path = '/tmp'
}
return path
}
2019-11-24 04:27:02 +01:00
pub fn chmod(path string, mode int) {
C.chmod(path.str, mode)
2019-11-29 17:14:26 +01:00
}
pub const (
2019-12-19 22:29:37 +01:00
wd_at_startup = getwd()
)
// 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,
// *no matter* how the program was started, and what is the current working directory.
pub fn resource_abs_path(path string) string {
mut base_path := os.realpath(filepath.dir(os.executable()))
vresource := os.getenv('V_RESOURCE_PATH')
if vresource.len != 0 {
base_path = vresource
}
return os.realpath( filepath.join( base_path, path ) )
}