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https://github.com/vlang/v.git
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312 lines
6.1 KiB
V
312 lines
6.1 KiB
V
module os
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import strings
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#include <dirent.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/utsname.h>
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pub const (
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path_separator = '/'
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path_delimiter = ':'
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)
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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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)
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// (Must be realized in Syscall) (Must be specified)
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// ref: http://www.ccfit.nsu.ru/~deviv/courses/unix/unix/ng7c229.html
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pub const (
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s_ifmt = 0xF000 // type of file
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s_ifdir = 0x4000 // directory
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s_iflnk = 0xa000 // link
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s_isuid = 0o4000 // SUID
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s_isgid = 0o2000 // SGID
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s_isvtx = 0o1000 // Sticky
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s_irusr = 0o0400 // Read by owner
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s_iwusr = 0o0200 // Write by owner
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s_ixusr = 0o0100 // Execute by owner
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s_irgrp = 0o0040 // Read by group
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s_iwgrp = 0o0020 // Write by group
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s_ixgrp = 0o0010 // Execute by group
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s_iroth = 0o0004 // Read by others
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s_iwoth = 0o0002 // Write by others
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s_ixoth = 0o0001 // Execute by others
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)
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struct C.utsname {
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mut:
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sysname charptr
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nodename charptr
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release charptr
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version charptr
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machine charptr
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}
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fn C.uname(name voidptr) int
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fn C.symlink(charptr, charptr) int
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pub fn uname() Uname {
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mut u := Uname{}
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utsize := sizeof(C.utsname)
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unsafe {
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x := malloc(int(utsize))
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d := &C.utsname(x)
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if C.uname(d) == 0 {
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u.sysname = cstring_to_vstring(byteptr(d.sysname))
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u.nodename = cstring_to_vstring(byteptr(d.nodename))
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u.release = cstring_to_vstring(byteptr(d.release))
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u.version = cstring_to_vstring(byteptr(d.version))
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u.machine = cstring_to_vstring(byteptr(d.machine))
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}
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free(d)
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}
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return u
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}
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fn init_os_args(argc int, argv &&byte) []string {
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mut args_ := []string{}
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// mut args := []string(make(0, argc, sizeof(string)))
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// mut args := []string{len:argc}
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for i in 0 .. argc {
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// args [i] = argv[i].vstring()
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unsafe { args_ << byteptr(argv[i]).vstring() }
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}
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return args_
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}
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pub fn ls(path string) ?[]string {
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mut res := []string{}
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dir := C.opendir(charptr(path.str))
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if isnil(dir) {
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return error('ls() couldnt open dir "$path"')
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}
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mut ent := &C.dirent(0)
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// mut ent := &C.dirent{!}
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for {
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ent = C.readdir(dir)
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if isnil(ent) {
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break
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}
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bptr := byteptr(ent.d_name)
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unsafe {
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if bptr[0] == 0 || (bptr[0] == `.` && bptr[1] == 0)
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|| (bptr[0] == `.` && bptr[1] == `.` && bptr[2] == 0) {
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continue
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}
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}
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res << tos_clone(bptr)
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}
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C.closedir(dir)
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return res
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}
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/*
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pub fn is_dir(path string) bool {
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//$if linux {
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//C.syscall(4, path.str) // sys_newstat
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//}
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dir := C.opendir(path.str)
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res := !isnil(dir)
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if res {
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C.closedir(dir)
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}
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return res
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}
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*/
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/*
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pub fn (mut f File) fseek(pos, mode int) {
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}
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*/
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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 == '.' {
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return true
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}
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/*
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mut k := 0
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defer {
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k = 1
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}
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*/
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apath := real_path(path)
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// defer {
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// apath.free()
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//}
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/*
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$if linux {
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$if !android {
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ret := C.syscall(sys_mkdir, apath.str, 511)
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if ret == -1 {
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return error(posix_get_error_msg(C.errno))
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}
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return true
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}
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}
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*/
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r := unsafe { C.mkdir(charptr(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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}
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return true
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}
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// exec starts the specified command, waits for it to complete, and returns its output.
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pub fn exec(cmd string) ?Result {
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// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
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// return error(';, &&, || and \\n are not allowed in shell commands')
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// }
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pcmd := '$cmd 2>&1'
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f := vpopen(pcmd)
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if isnil(f) {
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return error('exec("$cmd") failed')
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}
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buf := [4096]byte{}
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mut res := strings.new_builder(1024)
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unsafe {
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for C.fgets(charptr(buf), 4096, f) != 0 {
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bufbp := byteptr(buf)
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res.write_bytes(bufbp, vstrlen(bufbp))
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}
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}
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soutput := res.str()
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// res.free()
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exit_code := vpclose(f)
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if exit_code == 127 {
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return error_with_code(soutput, 127)
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}
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return Result{
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exit_code: exit_code
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output: soutput
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}
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}
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pub struct Command {
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mut:
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f voidptr
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pub mut:
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eof bool
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pub:
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path string
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redirect_stdout bool
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}
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// pub fn command(cmd Command) Command {
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//}
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pub fn (mut c Command) start() ? {
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pcmd := '$c.path 2>&1'
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c.f = vpopen(pcmd)
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if isnil(c.f) {
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return error('exec("$c.path") failed')
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}
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}
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pub fn (mut c Command) read_line() string {
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buf := [4096]byte{}
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mut res := strings.new_builder(1024)
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unsafe {
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for C.fgets(charptr(buf), 4096, c.f) != 0 {
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bufbp := byteptr(buf)
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len := vstrlen(bufbp)
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for i in 0 .. len {
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if int(bufbp[i]) == `\n` {
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res.write_bytes(bufbp, i)
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return res.str()
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}
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}
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res.write_bytes(bufbp, len)
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}
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}
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c.eof = true
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return res.str()
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}
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pub fn (c &Command) close() ? {
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exit_code := vpclose(c.f)
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if exit_code == 127 {
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return error_with_code('error', 127)
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}
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}
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pub fn symlink(origin string, target string) ?bool {
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res := C.symlink(charptr(origin.str), charptr(target.str))
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if res == 0 {
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return true
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}
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return error(posix_get_error_msg(C.errno))
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}
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// get_error_msg return error code representation in string.
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pub fn get_error_msg(code int) string {
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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 {
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return
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}
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f.is_opened = false
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/*
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$if linux {
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$if !android {
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C.syscall(sys_close, f.fd)
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return
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}
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}
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*/
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C.fflush(f.cfile)
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C.fclose(f.cfile)
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}
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pub fn debugger_present() bool {
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return false
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}
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fn C.mkstemp(stemplate byteptr) int
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// `is_writable_folder` - `folder` exists and is writable to the process
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pub fn is_writable_folder(folder string) ?bool {
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if !exists(folder) {
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return error('`$folder` does not exist')
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}
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if !is_dir(folder) {
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return error('`folder` is not a folder')
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}
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tmp_perm_check := join_path(folder, 'XXXXXX')
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unsafe {
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x := C.mkstemp(charptr(tmp_perm_check.str))
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if -1 == x {
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return error('folder `$folder` is not writable')
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}
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C.close(x)
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}
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rm(tmp_perm_check) ?
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return true
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}
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[inline]
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pub fn getpid() int {
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return C.getpid()
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}
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// Turns the given bit on or off, depending on the `enable` parameter
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pub fn posix_set_permission_bit(path_s string, mode u32, enable bool) {
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mut s := C.stat{}
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mut new_mode := u32(0)
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path := charptr(path_s.str)
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unsafe {
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C.stat(path, &s)
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new_mode = s.st_mode
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}
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match enable {
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true { new_mode |= mode }
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false { new_mode &= (0o7777 - mode) }
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}
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C.chmod(path, int(new_mode))
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}
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