v/vlib/os/os_nix.c.v

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module os
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import strings
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#include <dirent.h>
#include <unistd.h>
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#include <fcntl.h>
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#include <sys/utsname.h>
#include <sys/types.h>
#include <sys/ptrace.h>
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pub const (
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path_separator = '/'
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path_delimiter = ':'
)
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const (
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stdin_value = 0
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stdout_value = 1
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stderr_value = 2
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)
// (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
s_ifdir = 0x4000 // directory
s_iflnk = 0xa000 // link
s_isuid = 0o4000 // SUID
s_isgid = 0o2000 // SGID
s_isvtx = 0o1000 // Sticky
s_irusr = 0o0400 // Read by owner
s_iwusr = 0o0200 // Write by owner
s_ixusr = 0o0100 // Execute by owner
s_irgrp = 0o0040 // Read by group
s_iwgrp = 0o0020 // Write by group
s_ixgrp = 0o0010 // Execute by group
s_iroth = 0o0004 // Read by others
s_iwoth = 0o0002 // Write by others
s_ixoth = 0o0001 // Execute by others
)
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struct C.utsname {
mut:
sysname &char
nodename &char
release &char
version &char
machine &char
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}
fn C.uname(name voidptr) int
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fn C.symlink(&char, &char) int
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fn C.link(&char, &char) int
fn C.gethostname(&char, int) int
// NB: 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
fn C.ptrace(u32, u32, voidptr, int) u64
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pub fn uname() Uname {
mut u := Uname{}
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utsize := sizeof(C.utsname)
unsafe {
x := malloc_noscan(int(utsize))
d := &C.utsname(x)
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)
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}
return u
}
pub fn hostname() string {
mut hstnme := ''
size := 256
mut buf := unsafe { &char(malloc_noscan(size)) }
if C.gethostname(buf, size) == 0 {
hstnme = unsafe { cstring_to_vstring(buf) }
unsafe { free(buf) }
return hstnme
}
return ''
}
pub fn loginname() string {
x := C.getlogin()
if !isnil(x) {
return unsafe { cstring_to_vstring(x) }
}
return ''
}
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fn init_os_args(argc int, argv &&byte) []string {
mut args_ := []string{}
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// mut args := []string(make(0, argc, sizeof(string)))
// mut args := []string{len:argc}
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for i in 0 .. argc {
// args [i] = argv[i].vstring()
unsafe { args_ << (&byte(argv[i])).vstring_literal() }
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}
return args_
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}
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pub fn ls(path string) ?[]string {
mut res := []string{}
dir := unsafe { C.opendir(&char(path.str)) }
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if isnil(dir) {
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return error('ls() couldnt open dir "$path"')
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}
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mut ent := &C.dirent(0)
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// mut ent := &C.dirent{!}
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for {
ent = C.readdir(dir)
if isnil(ent) {
break
}
unsafe {
bptr := &byte(&ent.d_name[0])
if bptr[0] == 0 || (bptr[0] == `.` && bptr[1] == 0)
|| (bptr[0] == `.` && bptr[1] == `.` && bptr[2] == 0) {
continue
}
res << tos_clone(bptr)
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}
}
C.closedir(dir)
return res
}
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/*
pub fn is_dir(path string) bool {
//$if linux {
//C.syscall(4, path.str) // sys_newstat
//}
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dir := C.opendir(path.str)
res := !isnil(dir)
if res {
C.closedir(dir)
}
return res
}
*/
/*
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pub fn (mut f File) fseek(pos, mode int) {
}
*/
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// mkdir creates a new directory with the specified path.
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pub fn mkdir(path string) ?bool {
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if path == '.' {
return true
}
/*
mut k := 0
defer {
k = 1
}
*/
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apath := real_path(path)
// defer {
// apath.free()
//}
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/*
$if linux {
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$if !android {
ret := C.syscall(sys_mkdir, apath.str, 511)
if ret == -1 {
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return error(posix_get_error_msg(C.errno))
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}
return true
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}
}
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*/
r := unsafe { C.mkdir(&char(apath.str), 511) }
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if r == -1 {
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return error(posix_get_error_msg(C.errno))
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}
return true
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}
// execute starts the specified command, waits for it to complete, and returns its output.
[manualfree]
pub fn execute(cmd string) Result {
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// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
// return Result{ exit_code: -1, output: ';, &&, || and \\n are not allowed in shell commands' }
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// }
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pcmd := '$cmd 2>&1'
f := vpopen(pcmd)
if isnil(f) {
return Result{
exit_code: -1
output: 'exec("$cmd") failed'
}
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}
buf := unsafe { malloc_noscan(4096) }
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mut res := strings.new_builder(1024)
defer {
unsafe { res.free() }
}
unsafe {
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bufbp := buf
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for C.fgets(&char(bufbp), 4096, f) != 0 {
buflen := vstrlen(bufbp)
res.write_ptr(bufbp, buflen)
}
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}
soutput := res.str()
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exit_code := vpclose(f)
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unsafe { free(buf) }
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return Result{
exit_code: exit_code
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output: soutput
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}
}
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pub struct Command {
mut:
f voidptr
pub mut:
eof bool
pub:
path string
redirect_stdout bool
}
[manualfree]
pub fn (mut c Command) start() ? {
pcmd := c.path + ' 2>&1'
defer {
unsafe { pcmd.free() }
}
c.f = vpopen(pcmd)
if isnil(c.f) {
return error('exec("$c.path") failed')
}
}
[manualfree]
pub fn (mut c Command) read_line() string {
buf := [4096]byte{}
mut res := strings.new_builder(1024)
defer {
unsafe { res.free() }
}
unsafe {
bufbp := &buf[0]
for C.fgets(&char(bufbp), 4096, c.f) != 0 {
len := vstrlen(bufbp)
for i in 0 .. len {
if bufbp[i] == `\n` {
res.write_ptr(bufbp, i)
final := res.str()
return final
}
}
res.write_ptr(bufbp, len)
}
}
c.eof = true
final := res.str()
return final
}
pub fn (c &Command) close() ? {
exit_code := vpclose(c.f)
if exit_code == 127 {
return error_with_code('error', 127)
}
}
pub fn symlink(origin string, target string) ?bool {
res := C.symlink(&char(origin.str), &char(target.str))
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if res == 0 {
return true
}
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return error(posix_get_error_msg(C.errno))
}
pub fn link(origin string, target string) ?bool {
res := C.link(&char(origin.str), &char(target.str))
if res == 0 {
return true
}
return error(posix_get_error_msg(C.errno))
}
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// get_error_msg return error code representation in string.
pub fn get_error_msg(code int) string {
return posix_get_error_msg(code)
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}
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pub fn (mut f File) close() {
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if !f.is_opened {
return
}
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f.is_opened = false
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/*
$if linux {
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$if !android {
C.syscall(sys_close, f.fd)
return
}
}
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*/
C.fflush(f.cfile)
C.fclose(f.cfile)
}
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[inline]
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pub fn debugger_present() bool {
// check if the parent could trace its process,
// if not a debugger must be present
$if linux {
return C.ptrace(C.PTRACE_TRACEME, 0, 1, 0) == -1
} $else $if macos {
return C.ptrace(C.PT_TRACE_ME, 0, voidptr(1), 0) == -1
}
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return false
}
fn C.mkstemp(stemplate &byte) int
// `is_writable_folder` - `folder` exists and is writable to the process
pub fn is_writable_folder(folder string) ?bool {
if !exists(folder) {
return error('`$folder` does not exist')
}
if !is_dir(folder) {
return error('`folder` is not a folder')
}
tmp_perm_check := join_path(folder, 'XXXXXX')
unsafe {
x := C.mkstemp(&char(tmp_perm_check.str))
if -1 == x {
return error('folder `$folder` is not writable')
}
C.close(x)
}
rm(tmp_perm_check) ?
return true
}
[inline]
pub fn getpid() int {
return C.getpid()
}
[inline]
pub fn getppid() int {
return C.getppid()
}
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[inline]
pub fn getuid() int {
return C.getuid()
}
[inline]
pub fn geteuid() int {
return C.geteuid()
}
[inline]
pub fn getgid() int {
return C.getgid()
}
[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 s := C.stat{}
mut new_mode := u32(0)
path := &char(path_s.str)
unsafe {
C.stat(path, &s)
new_mode = s.st_mode
}
match enable {
true { new_mode |= mode }
false { new_mode &= (0o7777 - mode) }
}
C.chmod(path, int(new_mode))
}