child_process.execFile(file[, args][, options][, callback])
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file<String> The name or path of the executable file to run -
args<Array> List of string arguments -
options<Object>-
cwd<String> Current working directory of the child process -
env<Object> Environment key-value pairs -
encoding<String> (Default: 'utf8') -
timeout<Number> (Default: 0) -
maxBuffer<Number> largest amount of data (in bytes) allowed on stdout or stderr - if exceeded child process is killed (Default: 200*1024) -
killSignal<String> (Default: 'SIGTERM') -
uid<Number> Sets the user identity of the process. (See setuid(2).) -
gid<Number> Sets the group identity of the process. (See setgid(2).)
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callback<Function> called with the output when process terminates - Return: <ChildProcess>
The child_process.execFile() function is similar to child_process.exec() except that it does not spawn a shell. Rather, the specified executable file is spawned directly as a new process making it slightly more efficient than child_process.exec().
The same options as child_process.exec() are supported. Since a shell is not spawned, behaviors such as I/O redirection and file globbing are not supported.
const execFile = require('child_process').execFile;
const child = execFile('node', ['--version'], (error, stdout, stderr) => {
if (error) {
throw error;
}
console.log(stdout);
});The stdout and stderr arguments passed to the callback will contain the stdout and stderr output of the child process. By default, Node.js will decode the output as UTF-8 and pass strings to the callback. The encoding option can be used to specify the character encoding used to decode the stdout and stderr output. If encoding is 'buffer', Buffer objects will be passed to the callback instead.
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