101 lines
3.2 KiB
C
101 lines
3.2 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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/* $Header */
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#include "gild.h"
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extern char errorBuff[ 1024];
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extern char **environ;
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void die( void)
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/* inherited from cgi-lib; a way of 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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exit( 1); /* belt and braces; should never be called */
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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. */
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{
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char firstln[ 1024];
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char * exec_args[1]; /* 'arguments' to pass to execve */
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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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setenv( "REMOTE_HOST", client_id, 1);
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/* set up the handler environment */
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sprintf( errorBuff,
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"using handler '%s' [%d] to handle %s request from %s",
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command->command, ( int)getpid(), command->protocol,
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client_id);
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error( LOG_NOTICE);
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/* log the request, and... */
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exec_args[ 0] = command->command;
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exec_args[ 1] = null;
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/* set up the dummy arguments */
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if ( execve( command->command, exec_args, environ) == -1)
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/* ...execute the command (shouldn't return) */
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{ /* if it did we've got an error */
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sprintf( errorBuff,
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"error [errno %d] whislt execing handler '%s' [%d]\n",
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errno, command->command, ( int)getpid()),
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error( LOG_ERR);
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}
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}
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exit( 0);
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}
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