I need in node.js function result = execSync(‘node -v’); that will synchronously execute the given command line and return all stdout’ed by that command text. ps. Sync is wrong. I know. Just for personal use. UPDATE Now we have mgutz’s solution which gives us exit code, but not stdout! Still waiting for a more precise … Read more
What are the differences between fork and exec? 9 Answers 9
I was looking to find the difference between these four on Google and I expected there to be a huge amount of information on this, but there really wasn’t any solid comparison between the four calls. I set about trying to compile a kind of basic at-a-glance look at the differences between these system calls … Read more
I was helped out today with a command, but it doesn’t seem to be working. This is the command: find /home/me/download/ -type f -name “*.rm” -exec ffmpeg -i {} -sameq {}.mp3 && rm {}\; The shell returns find: missing argument to `-exec’ What I am basically trying to do is go through a directory recursively … Read more
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question Can anyone explain what are the uses of the exec command in shell scripting with … Read more
What are the differences? Is there a specific situation or reason for each function? If yes, can you give some examples of those situations? PHP.net says that they are used to execute external programs. see reference From the examples I see, I don’t see any obvious difference. If I were to simply run a script … Read more
I’m struggling to understand the difference between shell_exec() and exec()… I’ve always used exec() to execute server side commands, when would I use shell_exec()? Is shell_exec() just a shorthand for exec()? It seems to be the same thing with fewer parameters. 4 Answers 4
What is the difference between the following Ruby methods? exec, system and %x() or Backticks I know they are used to execute terminal commands programmatically via Ruby, but I’d like to know why there are three different ways to do this. 3 Answers 3
How do I execute a string containing Python code in Python? 14 Answers 14 For statements, use exec(string) (Python 2/3) or exec string (Python 2): >>> mycode=”print “hello world”” >>> exec(mycode) Hello world When you need the value of an expression, use eval(string): >>> x = eval(“2+2”) >>> x 4 However, the first step should … Read more
I’ve been looking at dynamic evaluation of Python code, and come across the eval() and compile() functions, and the exec statement. Can someone please explain the difference between eval and exec, and how the different modes of compile() fit in? 3 s 3
