127 lines
2.7 KiB
V
127 lines
2.7 KiB
V
module os
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$if js_node {
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#const $child_process = require('child_process')
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}
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// new_process - create a new process descriptor
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// NB: new does NOT start the new process.
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// That is done because you may want to customize it first,
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// by calling different set_ methods on it.
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// In order to start it, call p.run() or p.wait()
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pub fn new_process(filename string) &Process {
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return &Process{
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filename: filename
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stdio_fd: [-1, -1, -1]!
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}
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}
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fn (mut p Process) spawn_internal() {
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#p.val.pid = $child_process.spawn(
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#p.val.filename+'',
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#p.val.args.arr.map((x) => x.valueOf() + ''),
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#{
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#env: (p.val.env_is_custom ? p.val.env : $process.env),
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#})
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#p.val.pid.on('error', function (err) { builtin.panic('Failed to start subprocess') })
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p.status = .running
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if p.use_stdio_ctl {
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#p.val.pid.stdout.pipe(process.stdout)
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#p.val.pid.stdin.pipe(process.stdin)
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#p.val.pid.stderr.pipe(process.stderr)
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}
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}
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pub fn (mut p Process) run() {
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if p.status != .not_started {
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return
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}
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p.spawn_internal()
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return
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}
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pub fn (mut p Process) signal_kill() {
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if p.status !in [.running, .stopped] {
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return
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}
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#p.val.pid.kill('SIGKILL');
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p.status = .aborted
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}
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pub fn (mut p Process) signal_stop() {
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if p.status !in [.running, .stopped] {
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return
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}
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#p.val.pid.kill('SIGSTOP');
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p.status = .aborted
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}
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pub fn (mut p Process) signal_continue() {
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if p.status != .stopped {
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return
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}
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#p.val.pid.kill('SIGCONT');
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p.status = .running
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return
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}
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pub fn (mut p Process) wait() {
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if p.status == .not_started {
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p.spawn_internal()
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}
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if p.status !in [.running, .stopped] {
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return
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}
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p.wait_internal()
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return
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}
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fn (mut p Process) wait_internal() {
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#p.val.pid.on('exit', function (code) { console.log(code) })
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}
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pub fn (mut p Process) set_redirect_stdio() {
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p.use_stdio_ctl = true
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return
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}
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pub fn (mut p Process) stdin_write(s string) {
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p.check_redirection_call('stdin_write')
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#p.val.pid.stdin.write(s)
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}
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pub fn (mut p Process) stdin_resume() {
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#p.val.pid.stdin.resume()
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}
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// todo(playX): probably does not work
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// will read from stdout pipe, will only return when EOF (end of file) or data
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// means this will block unless there is data
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pub fn (mut p Process) stdout_slurp() string {
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p.check_redirection_call('stdout_slurp')
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mut res := ''
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#p.val.pid.stdout.on('data', function (data) { res = new string(data) })
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return res
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}
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// _check_redirection_call - should be called just by stdxxx methods
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fn (mut p Process) check_redirection_call(fn_name string) {
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if !p.use_stdio_ctl {
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panic('Call p.set_redirect_stdio() before calling p.$fn_name')
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}
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if p.status == .not_started {
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panic('Call p.${fn_name}() after you have called p.run()')
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}
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}
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pub fn (mut p Process) close() {
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// no-op on JS backend
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}
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