11-07-2008
How to Run a Linux Command and Redirect its output to a socket in C
I have a Linux socket server program. I need to run the commands sent by the client and return the output to client. Is there a quicker way?
I tried with
ptr=popen(command, "r"); and then
fgets(buf, size,ptr);
write buf to socket
fgets hangs for me.
Now, I would like to know if I can re-direct the output of popen() or system() to the client socket. How can I do that?
Thank you very much.
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LEARN ABOUT DEBIAN
explain_popen_or_die
explain_popen_or_die(3) Library Functions Manual explain_popen_or_die(3)
NAME
explain_popen_or_die - process I/O and report errors
SYNOPSIS
#include <libexplain/popen.h>
FILE *explain_popen_or_die(const char *command, const char *flags);
DESCRIPTION
The explain_popen_or_die function is used to call the popen(3) system call. On failure an explanation will be printed to stderr, obtained
from explain_popen(3), and then the process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion similar to the following example:
FILE *fp = explain_popen_or_die(command, flags);
command The command, exactly as to be passed to the popen(3) system call.
flags The flags, exactly as to be passed to the popen(3) system call.
Returns:
This function only returns on success, see popen(3) for more information. On failure, prints an explanation and exits.
SEE ALSO
popen(3)
process I/O
explain_popen(3)
explain popen(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_popen_or_die(3)