mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
504 lines
10 KiB
V
504 lines
10 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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#include <sys/types.h>
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#include <utime.h>
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$if !solaris && !haiku && !emscripten ? {
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#include <sys/ptrace.h>
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}
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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 executable_suffixes = ['']
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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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fn C.utime(&char, voidptr) int
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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
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fn C.gethostname(&char, int) int
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// Note: not available on Android fn C.getlogin_r(&char, int) int
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fn C.getlogin() &char
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fn C.getppid() int
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fn C.getgid() int
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fn C.getegid() int
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fn C.ptrace(u32, u32, voidptr, int) u64
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enum GlobMatch {
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exact
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ends_with
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starts_with
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start_and_ends_with
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contains
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any
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}
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fn glob_match(dir string, pattern string, next_pattern string, mut matches []string) []string {
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mut subdirs := []string{}
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if is_file(dir) {
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return subdirs
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}
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mut files := ls(dir) or { return subdirs }
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mut mode := GlobMatch.exact
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mut pat := pattern
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if pat == '*' {
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mode = GlobMatch.any
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if next_pattern != pattern && next_pattern != '' {
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for file in files {
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if is_dir('$dir/$file') {
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subdirs << '$dir/$file'
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}
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}
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return subdirs
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}
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}
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if pat == '**' {
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files = walk_ext(dir, '')
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pat = next_pattern
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}
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if pat.starts_with('*') {
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mode = .ends_with
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pat = pat[1..]
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}
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if pat.ends_with('*') {
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mode = if mode == .ends_with { GlobMatch.contains } else { GlobMatch.starts_with }
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pat = pat[..pat.len - 1]
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}
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if pat.contains('*') {
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mode = .start_and_ends_with
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}
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for file in files {
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mut fpath := file
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f := if file.contains(os.path_separator) {
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pathwalk := file.split(os.path_separator)
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pathwalk[pathwalk.len - 1]
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} else {
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fpath = if dir == '.' { file } else { '$dir/$file' }
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file
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}
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if f in ['.', '..'] || f == '' {
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continue
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}
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hit := match mode {
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.any {
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true
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}
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.exact {
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f == pat
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}
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.starts_with {
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f.starts_with(pat)
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}
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.ends_with {
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f.ends_with(pat)
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}
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.start_and_ends_with {
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p := pat.split('*')
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f.starts_with(p[0]) && f.ends_with(p[1])
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}
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.contains {
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f.contains(pat)
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}
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}
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if hit {
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if is_dir(fpath) {
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subdirs << fpath
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if next_pattern == pattern && next_pattern != '' {
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matches << '$fpath$os.path_separator'
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}
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} else {
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matches << fpath
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}
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}
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}
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return subdirs
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}
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fn native_glob_pattern(pattern string, mut matches []string) ! {
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steps := pattern.split(os.path_separator)
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mut cwd := if pattern.starts_with(os.path_separator) { os.path_separator } else { '.' }
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mut subdirs := [cwd]
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for i := 0; i < steps.len; i++ {
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step := steps[i]
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step2 := if i + 1 == steps.len { step } else { steps[i + 1] }
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if step == '' {
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continue
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}
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if is_dir('$cwd$os.path_separator$step') {
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dd := if cwd == '/' {
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step
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} else {
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if cwd == '.' || cwd == '' {
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step
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} else {
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if step == '.' || step == '/' { cwd } else { '$cwd/$step' }
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}
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}
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if i + 1 != steps.len {
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if dd !in subdirs {
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subdirs << dd
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}
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}
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}
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mut subs := []string{}
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for sd in subdirs {
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d := if cwd == '/' {
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sd
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} else {
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if cwd == '.' || cwd == '' {
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sd
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} else {
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if sd == '.' || sd == '/' { cwd } else { '$cwd/$sd' }
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}
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}
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subs << glob_match(d.replace('//', '/'), step, step2, mut matches)
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}
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subdirs = subs.clone()
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}
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}
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pub fn utime(path string, actime int, modtime int) ! {
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mut u := C.utimbuf{actime, modtime}
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if C.utime(&char(path.str), voidptr(&u)) != 0 {
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return error_with_code(posix_get_error_msg(C.errno), C.errno)
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}
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}
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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_noscan(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(d.sysname)
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u.nodename = cstring_to_vstring(d.nodename)
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u.release = cstring_to_vstring(d.release)
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u.version = cstring_to_vstring(d.version)
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u.machine = cstring_to_vstring(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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pub fn hostname() string {
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mut hstnme := ''
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size := 256
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mut buf := unsafe { &char(malloc_noscan(size)) }
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if C.gethostname(buf, size) == 0 {
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hstnme = unsafe { cstring_to_vstring(buf) }
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unsafe { free(buf) }
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return hstnme
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}
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return ''
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}
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pub fn loginname() string {
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x := C.getlogin()
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if !isnil(x) {
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return unsafe { cstring_to_vstring(x) }
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}
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return ''
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}
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fn init_os_args(argc int, argv &&u8) []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] = unsafe { tos_clone(argv[i]) }
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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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if path.len == 0 {
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return error('ls() expects a folder, not an empty string')
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}
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mut res := []string{cap: 50}
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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 {
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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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unsafe {
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bptr := &u8(&ent.d_name[0])
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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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res << tos_clone(bptr)
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}
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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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// mkdir creates a new directory with the specified path.
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pub fn mkdir(path string, params MkdirParams) ! {
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if path == '.' {
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return
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}
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apath := real_path(path)
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r := unsafe { C.mkdir(&char(apath.str), params.mode) }
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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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}
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// execute starts the specified command, waits for it to complete, and returns its output.
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[manualfree]
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pub fn execute(cmd string) Result {
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// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
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// return Result{ exit_code: -1, output: ';, &&, || and \\n are not allowed in shell commands' }
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// }
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pcmd := if cmd.contains('2>') { cmd.clone() } else { '$cmd 2>&1' }
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defer {
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unsafe { pcmd.free() }
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}
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f := vpopen(pcmd)
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if isnil(f) {
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return Result{
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exit_code: -1
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output: 'exec("$cmd") failed'
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}
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}
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fd := fileno(f)
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mut res := strings.new_builder(1024)
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defer {
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unsafe { res.free() }
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}
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buf := [4096]u8{}
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unsafe {
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pbuf := &buf[0]
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for {
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len := C.read(fd, pbuf, 4096)
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if len == 0 {
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break
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}
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res.write_ptr(pbuf, len)
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}
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}
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soutput := res.str()
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exit_code := vpclose(f)
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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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// raw_execute does the same as `execute` on Unix platforms.
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// On Windows raw_execute starts the specified command, waits for it to complete, and returns its output.
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// It's marked as `unsafe` to help emphasize the problems that may arise by allowing, for example,
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// user provided escape sequences.
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[unsafe]
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pub fn raw_execute(cmd string) Result {
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return execute(cmd)
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}
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[manualfree]
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pub fn (mut c Command) start() ! {
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pcmd := c.path + ' 2>&1'
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defer {
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unsafe { pcmd.free() }
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}
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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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[manualfree]
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pub fn (mut c Command) read_line() string {
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buf := [4096]u8{}
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mut res := strings.new_builder(1024)
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defer {
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unsafe { res.free() }
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}
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unsafe {
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bufbp := &buf[0]
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for C.fgets(&char(bufbp), 4096, c.f) != 0 {
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len := vstrlen(bufbp)
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for i in 0 .. len {
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if bufbp[i] == `\n` {
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res.write_ptr(bufbp, i)
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final := res.str()
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return final
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}
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}
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res.write_ptr(bufbp, len)
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}
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}
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c.eof = true
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final := res.str()
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return final
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}
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pub fn (mut c Command) close() ! {
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c.exit_code = vpclose(c.f)
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if c.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) ! {
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res := C.symlink(&char(origin.str), &char(target.str))
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if res == 0 {
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return
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}
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return error(posix_get_error_msg(C.errno))
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}
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pub fn link(origin string, target string) ! {
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res := C.link(&char(origin.str), &char(target.str))
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if res == 0 {
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return
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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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C.fflush(f.cfile)
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C.fclose(f.cfile)
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}
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[inline]
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pub fn debugger_present() bool {
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// check if the parent could trace its process,
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// if not a debugger must be present
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$if linux {
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return C.ptrace(C.PTRACE_TRACEME, 0, 1, 0) == -1
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} $else $if macos {
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return C.ptrace(C.PT_TRACE_ME, 0, voidptr(1), 0) == -1
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}
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return false
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}
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fn C.mkstemp(stemplate &u8) int
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// ensure_folder_is_writable checks that `folder` exists, and is writable to the process
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// by creating an empty file in it, then deleting it.
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[manualfree]
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pub fn ensure_folder_is_writable(folder string) ! {
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if !exists(folder) {
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return error_with_code('`$folder` does not exist', 1)
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}
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if !is_dir(folder) {
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return error_with_code('`$folder` is not a folder', 2)
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}
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tmp_perm_check := join_path_single(folder, 'XXXXXX')
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defer {
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unsafe { tmp_perm_check.free() }
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}
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unsafe {
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x := C.mkstemp(&char(tmp_perm_check.str))
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if -1 == x {
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return error_with_code('folder `$folder` is not writable', 3)
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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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}
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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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[inline]
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pub fn getppid() int {
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return C.getppid()
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}
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[inline]
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pub fn getuid() int {
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return C.getuid()
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}
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[inline]
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pub fn geteuid() int {
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return C.geteuid()
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}
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[inline]
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pub fn getgid() int {
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return C.getgid()
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}
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[inline]
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pub fn getegid() int {
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return C.getegid()
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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 := &char(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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