How could I pass a dynamic set of arguments to Go’s command exec.Command?
Like this: args := []string{“what”, “ever”, “you”, “like”} cmd := exec.Command(app, args…) Have a look at the language and tutorial on golang.org.
exec
How can I escape double-quotes in ant?
Ant uses XML, so you can use the normal XML entities like ": tasklist /FI "IMAGENAME eq java.exe" /FI "MEMUSAGE gt 50000"
Need explanations for Linux bash builtin exec command behavior
In this particular case, you have the exec in a pipeline. In order to execute a series of pipeline commands, the shell must initially fork, making a sub-shell. (Specifically it has to create the pipe, then fork, so that everything run “on the left” of the pipe can have its output sent to whatever is … Read more
Dynamically filtering a pandas dataframe
If you’re trying to build a dynamic query, there are easier ways. Here’s one using a list comprehension and str.join: query = ‘ & ‘.join([‘{}>{}’.format(k, v) for k, v in limits_dic.items()]) Or, using f-strings with python-3.6+, query = ‘ & ‘.join([f'{k}>{v}’ for k, v in limits_dic.items()]) print(query) ‘A>0 & C>-1 & B>2’ Pass the query … Read more
What happens to malloc’ed memory after exec() changes the program image?
When you call fork(), a copy of the calling process is created. This child process is (almost) exactly the same as the parent, i.e. memory allocated by malloc() is preserved and you’re free to read or modify it. The modifications will not be visible to the parent process, though, as the parent and child processes … Read more
How to execute cmd commands via Java
I found this in forums.oracle.com Allows the reuse of a process to execute multiple commands in Windows: http://kr.forums.oracle.com/forums/thread.jspa?messageID=9250051 You need something like String[] command = { “cmd”, }; Process p = Runtime.getRuntime().exec(command); new Thread(new SyncPipe(p.getErrorStream(), System.err)).start(); new Thread(new SyncPipe(p.getInputStream(), System.out)).start(); PrintWriter stdin = new PrintWriter(p.getOutputStream()); stdin.println(“dir c:\\ /A /Q”); // write any other commands you … Read more
nodeJS exec does not work for “cd ” shell cmd
Each command is executed in a separate shell, so the first cd only affects that shell process which then terminates. If you want to run git in a particular directory, just have Node set the path for you: exec(‘git status’, {cwd: ‘/home/ubuntu/distro’}, /* … */); cwd (current working directory) is one of many options available … Read more
What’s the difference between escapeshellarg and escapeshellcmd?
Generally, you’ll want to use escapeshellarg, making a single argument to a shell command safe. Here’s why: Suppose you need to get a list of files in a directory. You come up with the following: $path=”path/to/directory”; // From user input $files = shell_exec(‘ls ‘.$path); // Executes `ls path/to/directory` (This is a bad way of doing … Read more