mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.0 KiB
110 lines
3.0 KiB
// Copyright Joyent, Inc. and other Node contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
|
// copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to permit
|
|
// persons to whom the Software is furnished to do so, subject to the
|
|
// following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included
|
|
// in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
|
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
// USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
var is_windows = process.platform === 'win32';
|
|
|
|
var assert = require('assert'),
|
|
util = require('util'),
|
|
spawn = require('child_process').spawn;
|
|
|
|
// We're trying to reproduce:
|
|
// $ echo "hello\nnode\nand\nworld" | grep o | sed s/o/a/
|
|
|
|
var echo = is_windows ? spawn('cmd.exe', ['/c', 'echo', 'hello&&', 'echo',
|
|
'node&&', 'echo', 'and&&', 'echo', 'world']) :
|
|
spawn('echo', ['hello\nnode\nand\nworld\n']),
|
|
grep = spawn('grep', ['o']),
|
|
sed = spawn('sed', ['s/o/O/']);
|
|
|
|
/*
|
|
* grep and sed hang if the spawn function leaks file descriptors to child
|
|
* processes.
|
|
* This happens when calling pipe(2) and then forgetting to set the
|
|
* FD_CLOEXEC flag on the resulting file descriptors.
|
|
*
|
|
* This test checks child processes exit, meaning they don't hang like
|
|
* explained above.
|
|
*/
|
|
|
|
|
|
|
|
// pipe echo | grep
|
|
echo.stdout.on('data', function(data) {
|
|
console.error('grep stdin write ' + data.length);
|
|
if (!grep.stdin.write(data)) {
|
|
echo.stdout.pause();
|
|
}
|
|
});
|
|
|
|
grep.stdin.on('drain', function(data) {
|
|
echo.stdout.resume();
|
|
});
|
|
|
|
// propagate end from echo to grep
|
|
echo.stdout.on('end', function(code) {
|
|
grep.stdin.end();
|
|
});
|
|
|
|
echo.on('exit', function() {
|
|
console.error('echo exit');
|
|
});
|
|
|
|
grep.on('exit', function() {
|
|
console.error('grep exit');
|
|
});
|
|
|
|
sed.on('exit', function() {
|
|
console.error('sed exit');
|
|
});
|
|
|
|
|
|
|
|
// pipe grep | sed
|
|
grep.stdout.on('data', function(data) {
|
|
console.error('grep stdout ' + data.length);
|
|
if (!sed.stdin.write(data)) {
|
|
grep.stdout.pause();
|
|
}
|
|
});
|
|
|
|
sed.stdin.on('drain', function(data) {
|
|
grep.stdout.resume();
|
|
});
|
|
|
|
// propagate end from grep to sed
|
|
grep.stdout.on('end', function(code) {
|
|
console.error('grep stdout end');
|
|
sed.stdin.end();
|
|
});
|
|
|
|
|
|
|
|
var result = '';
|
|
|
|
// print sed's output
|
|
sed.stdout.on('data', function(data) {
|
|
result += data.toString('utf8', 0, data.length);
|
|
util.print(data);
|
|
});
|
|
|
|
sed.stdout.on('end', function(code) {
|
|
assert.equal(result, 'hellO\nnOde\nwOrld\n');
|
|
});
|
|
|