redirection

bhuvana · 07-03-2006, 02:21 AM

hello...
how can i redirect the output of a command into a file in a c program..(not at the command prompt)
when i used "top>filename" inside a popen command it was giving an error..
can u please help me....
thanku.

raskin · 07-03-2006, 02:36 AM

1. system()
2. create pipe. fork. Redirect (with dup2) in/out/err of child to file/from pipe. exec()

acid_kewpie · 07-03-2006, 02:36 AM

well firstly tell us what the error is, we're not psychic... and also top is an interactive program, so doesn't make sense to use in this way, you'd use options like "-n1" to make it only show output once and terminate