f54afde746
client identified and passed in environment to handlers; logging through syslogd sorted and working well.
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/**************************************************************************\
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* *
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* Project: Gild *
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* wrapper.c *
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* *
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* Purpose: Given a open socket connected to a client, handle *
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* the conversation with the client by detecting the protocol *
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* in use and invoking the appropriate handler *
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* *
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* Author : Simon Brooke *
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* Copyright: (c) Simon Brooke 1997 *
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* Version : 0.1 *
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* Created : 7th October 1997 *
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* *
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\**************************************************************************/
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#include "gild.h"
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char errorBuff[ 1024];
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void die( void) /* inherited from cgi-lib; a way of
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getting rid of errant programs */
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{
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sprintf( errorBuff, "potentially serious: handler over-ran alloted time");
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error( LOG_ERR);
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}
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void wrapper( int conversation, char * client_id)
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/* conversation is the handle on an open socket communicating with a
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client. What I want to do is quite simple, and there must be a
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straightforward way of doing it: attach the conversation to both
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the standard input and the standard output of a process, and then
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exec the handler within that process... I can't (at present) find
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an easy way of doing that, however */
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{
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char firstln[ 1024];
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handler * command = null;
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recv( conversation, firstln, 80, MSG_PEEK);
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/* get the first thing the client
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says, but leave it on the input
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stream for the handler. */
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if ( dup2( conversation, STDIN_FILENO) == -1)
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{
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sprintf( errorBuff,
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"failed to duplicate conversation [%d] onto stdin: %s",
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conversation, strerror( errno));
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error( LOG_ERR);
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}
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if ( dup2( conversation, STDOUT_FILENO) == -1)
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{
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sprintf( errorBuff,
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"failed to duplicate conversation [%d] onto stdout: %s",
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conversation, strerror( errno));
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error( LOG_ERR);
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}
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command = get_handler( firstln);
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/* and find the appropriate handler */
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if ( command == null) /* didn't find one */
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{
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sprintf( errorBuff, "no handler registered for %s", firstln);
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error( LOG_ERR);
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}
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else /* did find one */
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{
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sprintf( errorBuff,
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"using handler '%s' to handle %s request from %s",
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command->command, command->protocol, client_id);
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error( LOG_NOTICE);
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/* log the request */
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if ( command->timeout != 0)
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/* prevent runaway processes; if a
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timeout has been specified for this
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handler, enforce it */
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{
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signal( SIGALRM,(void (*)())die);
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alarm( command->timeout);
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}
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setenv( "REMOTE_HOST", client_id, 1);
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/* set up the handler environment */
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system( command->command);
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}
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exit( 0);
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}
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