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authorKumar Priyansh <[email protected]>2019-01-19 12:37:14 +0530
committerKumar Priyansh <[email protected]>2019-01-19 12:37:14 +0530
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tree4f6379d955555b298c0e7b83a67e264240ee5614 /cordova/node_modules/shelljs/src/chmod.js
parent76f7b3678d3f1ff99c3935a774d420453b0c3cb9 (diff)
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+var common = require('./common');
+var fs = require('fs');
+var path = require('path');
+
+var PERMS = (function (base) {
+ return {
+ OTHER_EXEC : base.EXEC,
+ OTHER_WRITE : base.WRITE,
+ OTHER_READ : base.READ,
+
+ GROUP_EXEC : base.EXEC << 3,
+ GROUP_WRITE : base.WRITE << 3,
+ GROUP_READ : base.READ << 3,
+
+ OWNER_EXEC : base.EXEC << 6,
+ OWNER_WRITE : base.WRITE << 6,
+ OWNER_READ : base.READ << 6,
+
+ // Literal octal numbers are apparently not allowed in "strict" javascript. Using parseInt is
+ // the preferred way, else a jshint warning is thrown.
+ STICKY : parseInt('01000', 8),
+ SETGID : parseInt('02000', 8),
+ SETUID : parseInt('04000', 8),
+
+ TYPE_MASK : parseInt('0770000', 8)
+ };
+})({
+ EXEC : 1,
+ WRITE : 2,
+ READ : 4
+});
+
+//@
+//@ ### chmod(octal_mode || octal_string, file)
+//@ ### chmod(symbolic_mode, file)
+//@
+//@ Available options:
+//@
+//@ + `-v`: output a diagnostic for every file processed//@
+//@ + `-c`: like verbose but report only when a change is made//@
+//@ + `-R`: change files and directories recursively//@
+//@
+//@ Examples:
+//@
+//@ ```javascript
+//@ chmod(755, '/Users/brandon');
+//@ chmod('755', '/Users/brandon'); // same as above
+//@ chmod('u+x', '/Users/brandon');
+//@ ```
+//@
+//@ Alters the permissions of a file or directory by either specifying the
+//@ absolute permissions in octal form or expressing the changes in symbols.
+//@ This command tries to mimic the POSIX behavior as much as possible.
+//@ Notable exceptions:
+//@
+//@ + In symbolic modes, 'a-r' and '-r' are identical. No consideration is
+//@ given to the umask.
+//@ + There is no "quiet" option since default behavior is to run silent.
+function _chmod(options, mode, filePattern) {
+ if (!filePattern) {
+ if (options.length > 0 && options.charAt(0) === '-') {
+ // Special case where the specified file permissions started with - to subtract perms, which
+ // get picked up by the option parser as command flags.
+ // If we are down by one argument and options starts with -, shift everything over.
+ filePattern = mode;
+ mode = options;
+ options = '';
+ }
+ else {
+ common.error('You must specify a file.');
+ }
+ }
+
+ options = common.parseOptions(options, {
+ 'R': 'recursive',
+ 'c': 'changes',
+ 'v': 'verbose'
+ });
+
+ if (typeof filePattern === 'string') {
+ filePattern = [ filePattern ];
+ }
+
+ var files;
+
+ if (options.recursive) {
+ files = [];
+ common.expand(filePattern).forEach(function addFile(expandedFile) {
+ var stat = fs.lstatSync(expandedFile);
+
+ if (!stat.isSymbolicLink()) {
+ files.push(expandedFile);
+
+ if (stat.isDirectory()) { // intentionally does not follow symlinks.
+ fs.readdirSync(expandedFile).forEach(function (child) {
+ addFile(expandedFile + '/' + child);
+ });
+ }
+ }
+ });
+ }
+ else {
+ files = common.expand(filePattern);
+ }
+
+ files.forEach(function innerChmod(file) {
+ file = path.resolve(file);
+ if (!fs.existsSync(file)) {
+ common.error('File not found: ' + file);
+ }
+
+ // When recursing, don't follow symlinks.
+ if (options.recursive && fs.lstatSync(file).isSymbolicLink()) {
+ return;
+ }
+
+ var perms = fs.statSync(file).mode;
+ var type = perms & PERMS.TYPE_MASK;
+
+ var newPerms = perms;
+
+ if (isNaN(parseInt(mode, 8))) {
+ // parse options
+ mode.split(',').forEach(function (symbolicMode) {
+ /*jshint regexdash:true */
+ var pattern = /([ugoa]*)([=\+-])([rwxXst]*)/i;
+ var matches = pattern.exec(symbolicMode);
+
+ if (matches) {
+ var applyTo = matches[1];
+ var operator = matches[2];
+ var change = matches[3];
+
+ var changeOwner = applyTo.indexOf('u') != -1 || applyTo === 'a' || applyTo === '';
+ var changeGroup = applyTo.indexOf('g') != -1 || applyTo === 'a' || applyTo === '';
+ var changeOther = applyTo.indexOf('o') != -1 || applyTo === 'a' || applyTo === '';
+
+ var changeRead = change.indexOf('r') != -1;
+ var changeWrite = change.indexOf('w') != -1;
+ var changeExec = change.indexOf('x') != -1;
+ var changeSticky = change.indexOf('t') != -1;
+ var changeSetuid = change.indexOf('s') != -1;
+
+ var mask = 0;
+ if (changeOwner) {
+ mask |= (changeRead ? PERMS.OWNER_READ : 0) + (changeWrite ? PERMS.OWNER_WRITE : 0) + (changeExec ? PERMS.OWNER_EXEC : 0) + (changeSetuid ? PERMS.SETUID : 0);
+ }
+ if (changeGroup) {
+ mask |= (changeRead ? PERMS.GROUP_READ : 0) + (changeWrite ? PERMS.GROUP_WRITE : 0) + (changeExec ? PERMS.GROUP_EXEC : 0) + (changeSetuid ? PERMS.SETGID : 0);
+ }
+ if (changeOther) {
+ mask |= (changeRead ? PERMS.OTHER_READ : 0) + (changeWrite ? PERMS.OTHER_WRITE : 0) + (changeExec ? PERMS.OTHER_EXEC : 0);
+ }
+
+ // Sticky bit is special - it's not tied to user, group or other.
+ if (changeSticky) {
+ mask |= PERMS.STICKY;
+ }
+
+ switch (operator) {
+ case '+':
+ newPerms |= mask;
+ break;
+
+ case '-':
+ newPerms &= ~mask;
+ break;
+
+ case '=':
+ newPerms = type + mask;
+
+ // According to POSIX, when using = to explicitly set the permissions, setuid and setgid can never be cleared.
+ if (fs.statSync(file).isDirectory()) {
+ newPerms |= (PERMS.SETUID + PERMS.SETGID) & perms;
+ }
+ break;
+ }
+
+ if (options.verbose) {
+ log(file + ' -> ' + newPerms.toString(8));
+ }
+
+ if (perms != newPerms) {
+ if (!options.verbose && options.changes) {
+ log(file + ' -> ' + newPerms.toString(8));
+ }
+ fs.chmodSync(file, newPerms);
+ }
+ }
+ else {
+ common.error('Invalid symbolic mode change: ' + symbolicMode);
+ }
+ });
+ }
+ else {
+ // they gave us a full number
+ newPerms = type + parseInt(mode, 8);
+
+ // POSIX rules are that setuid and setgid can only be added using numeric form, but not cleared.
+ if (fs.statSync(file).isDirectory()) {
+ newPerms |= (PERMS.SETUID + PERMS.SETGID) & perms;
+ }
+
+ fs.chmodSync(file, newPerms);
+ }
+ });
+}
+module.exports = _chmod;