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513 lines (467 loc) · 12.7 KB
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module os
import strings
#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/utsname.h>
#include <sys/types.h>
#include <sys/statvfs.h>
#include <utime.h>
// path_separator is the platform specific separator string, used between the folders and filenames in a path. It is '/' on POSIX, and '\\' on Windows.
pub const path_separator = '/'
// path_delimiter is the platform specific delimiter string, used between the paths in environment variables like PATH. It is ':' on POSIX, and ';' on Windows.
pub const path_delimiter = ':'
// path_devnull is a platform-specific file path of the null device.
// It is '/dev/null' on POSIX, and r'\\.\nul' on Windows.
pub const path_devnull = '/dev/null'
const executable_suffixes = ['']
const stdin_value = 0
const stdout_value = 1
const stderr_value = 2
// (Must be realized in Syscall) (Must be specified)
// ref: http://www.ccfit.nsu.ru/~deviv/courses/unix/unix/ng7c229.html
pub const s_ifmt = 0xF000 // type of file
pub const s_ifdir = 0x4000 // directory
pub const s_ifreg = 0x8000 // regular file
pub const s_iflnk = 0xa000 // link
pub const s_isuid = 0o4000 // SUID
pub const s_isgid = 0o2000 // SGID
pub const s_isvtx = 0o1000 // Sticky
pub const s_irusr = 0o0400 // Read by owner
pub const s_iwusr = 0o0200 // Write by owner
pub const s_ixusr = 0o0100 // Execute by owner
pub const s_irgrp = 0o0040 // Read by group
pub const s_iwgrp = 0o0020 // Write by group
pub const s_ixgrp = 0o0010 // Execute by group
pub const s_iroth = 0o0004 // Read by others
pub const s_iwoth = 0o0002 // Write by others
pub const s_ixoth = 0o0001
fn C.utime(&char, &C.utimbuf) int
fn C.uname(name &C.utsname) int
fn C.symlink(&char, &char) int
fn C.link(&char, &char) int
fn C.gethostname(&char, int) int
// Note: not available on Android fn C.getlogin_r(&char, int) int
fn C.getlogin() &char
fn C.getppid() int
fn C.getgid() int
fn C.getegid() int
enum GlobMatch {
exact
ends_with
starts_with
start_and_ends_with
contains
any
}
fn glob_match(dir string, pattern string, next_pattern string, mut matches []string) []string {
mut subdirs := []string{}
if is_file(dir) {
return subdirs
}
mut files := ls(dir) or { return subdirs }
mut mode := GlobMatch.exact
mut pat := pattern
if pat == '*' {
mode = GlobMatch.any
if next_pattern != pattern && next_pattern != '' {
for file in files {
if is_dir('${dir}/${file}') {
subdirs << '${dir}/${file}'
}
}
return subdirs
}
}
if pat == '**' {
files = walk_ext(dir, '')
pat = next_pattern
}
if pat.starts_with('*') {
mode = .ends_with
pat = pat[1..]
}
if pat.ends_with('*') {
mode = if mode == .ends_with { GlobMatch.contains } else { GlobMatch.starts_with }
pat = pat[..pat.len - 1]
}
if pat.contains('*') {
mode = .start_and_ends_with
}
for file in files {
mut fpath := file
f := if file.contains(path_separator) {
pathwalk := file.split(path_separator)
pathwalk[pathwalk.len - 1]
} else {
fpath = if dir == '.' { file } else { '${dir}/${file}' }
file
}
if f in ['.', '..'] || f == '' {
continue
}
hit := match mode {
.any {
true
}
.exact {
f == pat
}
.starts_with {
f.starts_with(pat)
}
.ends_with {
f.ends_with(pat)
}
.start_and_ends_with {
p := pat.split('*')
f.starts_with(p[0]) && f.ends_with(p[1])
}
.contains {
f.contains(pat)
}
}
if hit {
if is_dir(fpath) {
subdirs << fpath
if next_pattern == pattern && next_pattern != '' {
matches << '${fpath}${path_separator}'
}
} else {
matches << fpath
}
}
}
return subdirs
}
fn native_glob_pattern(pattern string, mut matches []string) ! {
steps := pattern.split(path_separator)
cwd := if pattern.starts_with(path_separator) { path_separator } else { '.' }
mut subdirs := [cwd]
for i := 0; i < steps.len; i++ {
step := steps[i]
step2 := if i + 1 == steps.len { step } else { steps[i + 1] }
if step == '' {
continue
}
if is_dir('${cwd}${path_separator}${step}') {
dd := if cwd == '/' {
step
} else {
if cwd == '.' || cwd == '' {
step
} else {
if step == '.' || step == '/' { cwd } else { '${cwd}/${step}' }
}
}
if i + 1 != steps.len {
if dd !in subdirs {
subdirs << dd
}
}
}
mut subs := []string{}
for sd in subdirs {
d := if cwd == '/' {
sd
} else {
if cwd == '.' || cwd == '' {
sd
} else {
if sd == '.' || sd == '/' { cwd } else { '${cwd}/${sd}' }
}
}
subs << glob_match(d.replace('//', '/'), step, step2, mut matches)
}
subdirs = subs.clone()
}
}
// utime changes the access and modification times of the inode specified by path.
// It returns POSIX error message, if it can not do so.
pub fn utime(path string, actime int, modtime int) ! {
u := C.utimbuf{actime, modtime}
if C.utime(&char(path.str), &u) != 0 {
return error_with_code(posix_get_error_msg(C.errno), C.errno)
}
}
// uname returns information about the platform on which the program is running.
// For example:
// os.Uname{
// sysname: 'Linux'
// nodename: 'nemesis'
// release: '5.15.0-57-generic'
// version: '#63~20.04.1-Ubuntu SMP Wed Nov 30 13:40:16 UTC 2022'
// machine: 'x86_64'
// }
// where the fields have the following meaning:
// sysname is the name of this implementation of the operating system
// nodename is the name of this node within an implementation-dependent communications network
// release is the current release level of this implementation
// version is the current version level of this release
// machine is the name of the hardware type, on which the system is running
// See also https://pubs.opengroup.org/onlinepubs/7908799/xsh/sysutsname.h.html
pub fn uname() Uname {
mut u := Uname{}
unsafe {
d := &C.utsname(malloc_noscan(int(sizeof(C.utsname))))
if C.uname(d) == 0 {
u.sysname = cstring_to_vstring(d.sysname)
u.nodename = cstring_to_vstring(d.nodename)
u.release = cstring_to_vstring(d.release)
u.version = cstring_to_vstring(d.version)
u.machine = cstring_to_vstring(d.machine)
}
free(d)
}
return u
}
// hostname returns the hostname (system's DNS name) or POSIX error message if the hostname call fails.
pub fn hostname() !string {
mut hstnme := ''
size := 256
buf := unsafe { &char(malloc_noscan(size)) }
if C.gethostname(buf, size) == 0 {
hstnme = unsafe { cstring_to_vstring(buf) }
unsafe { free(buf) }
return hstnme
}
return error(posix_get_error_msg(C.errno))
}
// loginname returns the name of the user logged in on the controlling terminal of the process.
// It returns a POSIX error message, if the getlogin call fails.
pub fn loginname() !string {
x := C.getlogin()
if !isnil(x) {
return unsafe { cstring_to_vstring(x) }
}
return error(posix_get_error_msg(C.errno))
}
// ls returns ![]string of the files and dirs in the given `path` ( os.ls uses C.readdir ). Symbolic links are returned to be files. For recursive list see os.walk functions.
// See also: `os.walk`, `os.walk_ext`, `os.is_dir`, `os.is_file`
// Example:
// ```
// entries := os.ls(os.home_dir()) or { [] }
// for entry in entries {
// if os.is_dir(os.join_path(os.home_dir(), entry)) {
// println('dir: $entry')
// } else {
// println('file: $entry')
// }
// }
// ```
@[manualfree]
pub fn ls(path string) ![]string {
if path == '' {
return error('ls() expects a folder, not an empty string')
}
mut res := []string{cap: 50}
dir := unsafe { C.opendir(&char(path.str)) }
if isnil(dir) {
return error_posix(msg: 'ls() couldnt open dir "${path}"')
}
mut ent := &C.dirent(unsafe { nil })
for {
ent = C.readdir(dir)
if isnil(ent) {
break
}
unsafe {
bptr := &u8(&ent.d_name[0])
if bptr[0] == 0 || (bptr[0] == `.` && bptr[1] == 0)
|| (bptr[0] == `.` && bptr[1] == `.` && bptr[2] == 0) {
continue
}
res << tos_clone(bptr)
}
}
C.closedir(dir)
return res
}
// mkdir creates a new directory with the specified path.
pub fn mkdir(path string, params MkdirParams) ! {
if path == '.' {
return
}
apath := real_path(path)
r := unsafe { C.mkdir(&char(apath.str), params.mode) }
if r == -1 {
return error(posix_get_error_msg(C.errno))
}
}
// execute starts the specified command, waits for it to complete, and returns its output.
@[manualfree]
pub fn execute(cmd string) Result {
pcmd := 'exec 2>&1;${cmd}'
defer {
unsafe { pcmd.free() }
}
f := vpopen(pcmd)
if isnil(f) {
return Result{
exit_code: -1
output: 'exec("${cmd}") failed'
}
}
fd := fileno(f)
mut res := strings.new_builder(1024)
defer {
unsafe { res.free() }
}
buf := [4096]u8{}
unsafe {
pbuf := &buf[0]
for {
len := C.read(fd, pbuf, 4096)
if len == 0 {
break
}
res.write_ptr(pbuf, len)
}
}
soutput := res.str()
exit_code := vpclose(f)
return Result{
exit_code: exit_code
output: soutput
}
}
// raw_execute does the same as `execute` on Unix platforms.
// On Windows raw_execute starts the specified command, waits for it to complete, and returns its output.
// It's marked as `unsafe` to help emphasize the problems that may arise by allowing, for example,
// user provided escape sequences.
@[unsafe]
pub fn raw_execute(cmd string) Result {
return execute(cmd)
}
// symlink creates a symbolic link named target, which points to origin.
// It returns a POSIX error message, if it can not do so.
pub fn symlink(origin string, target string) ! {
res := C.symlink(&char(origin.str), &char(target.str))
if res == 0 {
return
}
return error(posix_get_error_msg(C.errno))
}
// link creates a new link (also known as a hard link) to an existing file.
// It returns a POSIX error message, if it can not do so.
pub fn link(origin string, target string) ! {
res := C.link(&char(origin.str), &char(target.str))
if res == 0 {
return
}
return error(posix_get_error_msg(C.errno))
}
// get_error_msg return error code representation in string.
pub fn get_error_msg(code int) string {
return posix_get_error_msg(code)
}
pub fn (mut f File) close() {
if !f.is_opened {
return
}
f.is_opened = false
C.fflush(f.cfile)
C.fclose(f.cfile)
}
fn C.mkstemp(stemplate &u8) int
// ensure_folder_is_writable checks that `folder` exists, and is writable to the process
// by creating an empty file in it, then deleting it.
@[manualfree]
pub fn ensure_folder_is_writable(folder string) ! {
if !exists(folder) {
return error_with_code('`${folder}` does not exist', 1)
}
if !is_dir(folder) {
return error_with_code('`${folder}` is not a folder', 2)
}
tmp_perm_check := join_path_single(folder, 'XXXXXX')
defer {
unsafe { tmp_perm_check.free() }
}
unsafe {
x := C.mkstemp(&char(tmp_perm_check.str))
if -1 == x {
return error_with_code('folder `${folder}` is not writable', 3)
}
C.close(x)
}
rm(tmp_perm_check)!
}
// getpid returns the process ID (PID) of the calling process.
@[inline]
pub fn getpid() int {
return C.getpid()
}
// getppid returns the process ID of the parent of the calling process.
@[inline]
pub fn getppid() int {
return C.getppid()
}
// getuid returns the real user ID of the calling process.
@[inline]
pub fn getuid() int {
return C.getuid()
}
// geteuid returns the effective user ID of the calling process.
@[inline]
pub fn geteuid() int {
return C.geteuid()
}
// getgid returns the real group ID of the calling process.
@[inline]
pub fn getgid() int {
return C.getgid()
}
// getegid returns the effective group ID of the calling process.
@[inline]
pub fn getegid() int {
return C.getegid()
}
// Turns the given bit on or off, depending on the `enable` parameter.
pub fn posix_set_permission_bit(path_s string, mode u32, enable bool) {
mut new_mode := u32(0)
if s := stat(path_s) {
new_mode = s.mode
}
match enable {
true { new_mode |= mode }
false { new_mode &= (0o7777 - mode) }
}
C.chmod(&char(path_s.str), int(new_mode))
}
// get_long_path has no meaning for *nix, but has for windows, where `c:\folder\some~1` for example
// can be the equivalent of `c:\folder\some spa ces`. On *nix, it just returns a copy of the input path.
fn get_long_path(path string) !string {
return path
}
fn C.sysconf(name int) i64
// page_size returns the page size in bytes.
pub fn page_size() int {
return int(C.sysconf(C._SC_PAGESIZE))
}
struct C.statvfs {
f_bsize usize
f_blocks usize
f_bfree usize
f_bavail usize
}
// disk_usage returns disk usage of `path`.
@[manualfree]
pub fn disk_usage(path string) !DiskUsage {
mpath := if path == '' { '.' } else { path }
defer { unsafe { mpath.free() } }
mut vfs := C.statvfs{}
ret := unsafe { C.statvfs(&char(mpath.str), &vfs) }
if ret == -1 {
return error('cannot get disk usage of path')
}
f_bsize := u64(vfs.f_bsize)
f_blocks := u64(vfs.f_blocks)
f_bavail := u64(vfs.f_bavail)
f_bfree := u64(vfs.f_bfree)
return DiskUsage{
total: f_bsize * f_blocks
available: f_bsize * f_bavail
used: f_bsize * (f_blocks - f_bfree)
}
}