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src: don't error at startup when cwd doesn't exist
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The current working directory may not exist when iojs starts up.  Don't
treat that as an error because it's still possible to do many useful
things, like evaluating a command line script or starting a REPL.

This commit also fixes an age-old Windows bug where process.argv[0] was
not properly expanded, that's why the parallel/test-process-argv-0 test
gets an update as well.

Fixes: #1184
PR-URL: #1194
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Rod Vagg <rod@vagg.org>
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bnoordhuis committed Mar 19, 2015
1 parent c15e81a commit 2c6f79c
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Showing 3 changed files with 35 additions and 25 deletions.
29 changes: 10 additions & 19 deletions src/node.js
Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@

startup.processRawDebug();

startup.resolveArgv0();
process.argv[0] = process.execPath;

// There are various modes that Node can run in. The most common two
// are running from a script and running the REPL - but there are a few
Expand Down Expand Up @@ -459,7 +459,15 @@
function evalScript(name) {
var Module = NativeModule.require('module');
var path = NativeModule.require('path');
var cwd = process.cwd();

try {
var cwd = process.cwd();
} catch (e) {
// getcwd(3) can fail if the current working directory has been deleted.
// Fall back to the directory name of the (absolute) executable path.
// It's not really correct but what are the alternatives?
var cwd = path.dirname(process.execPath);
}

var module = new Module(name);
module.filename = path.join(cwd, name);
Expand Down Expand Up @@ -764,23 +772,6 @@
};
};


startup.resolveArgv0 = function() {
var cwd = process.cwd();
var isWindows = process.platform === 'win32';

// Make process.argv[0] into a full path, but only touch argv[0] if it's
// not a system $PATH lookup.
// TODO: Make this work on Windows as well. Note that "node" might
// execute cwd\node.exe, or some %PATH%\node.exe on Windows,
// and that every directory has its own cwd, so d:node.exe is valid.
var argv0 = process.argv[0];
if (!isWindows && argv0.indexOf('/') !== -1 && argv0.charAt(0) !== '/') {
var path = NativeModule.require('path');
process.argv[0] = path.join(cwd, process.argv[0]);
}
};

// Below you find a minimal module system, which is used to load the node
// core modules found in lib/*.js. All core modules are compiled into the
// node binary, so they can be loaded faster.
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24 changes: 24 additions & 0 deletions test/parallel/test-cwd-enoent.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
var common = require('../common');
var assert = require('assert');
var fs = require('fs');
var spawn = require('child_process').spawn;

// Fails with EINVAL on SmartOS, EBUSY on Windows.
if (process.platform === 'sunos' || process.platform === 'win32') {
console.log('1..0 # Skipped: cannot rmdir current working directory');
return;
}

var dirname = common.tmpDir + '/cwd-does-not-exist-' + process.pid;
fs.mkdirSync(dirname);
process.chdir(dirname);
fs.rmdirSync(dirname);

var proc = spawn(process.execPath, ['-e', '0']);
proc.stdout.pipe(process.stdout);
proc.stderr.pipe(process.stderr);

proc.once('exit', common.mustCall(function(exitCode, signalCode) {
assert.equal(exitCode, 0);
assert.equal(signalCode, null);
}));
7 changes: 1 addition & 6 deletions test/parallel/test-process-argv-0.js
Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,7 @@ if (process.argv[2] !== "child") {
});
child.on('exit', function () {
console.error('CHILD: %s', childErr.trim().split('\n').join('\nCHILD: '));
if (process.platform === 'win32') {
// On Windows argv[0] is not expanded into full path
assert.equal(childArgv0, './iojs');
} else {
assert.equal(childArgv0, process.execPath);
}
assert.equal(childArgv0, process.execPath);
});
}
else {
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