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Redirect stdin and out to sockets

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Top Forums Programming Redirect stdin and out to sockets
# 1  
Old 09-02-2008
Sorry, why are you creating a socket connection? Why don't you use pipe the output of the command back to the user?
Quote:
For Linux I've tried to mimic the shell using popen(), and to write and read in the handler returned by popen(), but I cannot run /bash shell commands as cd, cp, mkdir and so on because they are internal bin/bash commands
Hunh? If you use popen, the only limitation is that you cannot both read from and write into the file descriptor. Only if that limitation is a problem do you need sockets. But you say you can't run them because they are "internal commands". But there almost always external versions of these commands available. (For cd, however, it's useless -- you must do this within the context of your program, or prefix all subsequent commands with a "cd".) Regardless, all one needs to do in this case is run bash and provide it the command to parse.

Code:
fd=popen("/bin/bash -c \"cd /tmp; echo *\"","r");

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LEARN ABOUT DEBIAN

sockstat

SOCKSTAT(1)						    BSD General Commands Manual 					       SOCKSTAT(1)

NAME

     sockstat -- list open sockets

SYNOPSIS

     sockstat [-clh] [-p ports] [-P pid|process] [-U uid|user] [-G gid|group]

DESCRIPTION

     The sockstat command lists open Internet or UNIX domain sockets.

     The following options are available:

     -c 	 Show connected sockets.

     -l 	 Show listening sockets.

     -h 	 Show a usage summary.

     -p ports	 Only show Internet sockets if either the local or foreign port number is on the specified list.  The ports argument is a comma-
		 separated list of port numbers and ranges specified as first and last port separated by a dash.

     -P pid|process
		 Only show sockets of the specified pid|process.  The pid|process argument is a process name or pid.

     -U uid|user
		 Only show sockets of the specified uid|user.  The uid|user argument is a username or uid.

     -G gid|group
		 Only show sockets of the specified gid|group.	The gid|group argument is a groupname or gid.

     If neither -c or -l is specified, sockstat will list both listening and connected sockets.

     The information listed for each socket is:

     USER	      The user who owns the socket.

     COMMAND	      The command which holds the socket.

     PID	      The process ID of the command which holds the socket.

     FD 	      The file descriptor number of the socket.

     PROTO	      The transport protocol associated with the socket for Internet sockets, or the type of socket (stream or datagram) for UNIX
		      sockets.

     LOCAL ADDRESS    For Internet sockets, this is the address the local end of the socket is bound to (see getsockname(2)).  For bound UNIX
		      sockets, it is the socket's filename.  For other UNIX sockets, it is a right arrow followed by the endpoint's filename, or
		      ``??'' if the endpoint could not be determined.

     FOREIGN ADDRESS  (Internet sockets only) The address the foreign end of the socket is bound to (see getpeername(2)).

SEE ALSO

     netstat(1), protocols(5)

HISTORY

     The sockstat command appeared in FreeBSD 3.1.

AUTHORS

     The sockstat command and this manual page were written by Dag-Erling Smorgrav <des@FreeBSD.org>.

     The sockstat command was ported to Linux by William Pitcock <nenolod@nenolod.net>.

BSD
								   May 18, 2008 							       BSD