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Top Forums Programming How to Run a Linux Command and Redirect its output to a socket in C Post 302255952 by rajeshomallur on Friday 7th of November 2008 12:03:01 PM
Old 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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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)
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