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/**********************************************************
* cvs_ext.c
*
* Copyright (C) 2004, 2005 by Stefan Siegl <stesie@brokenpipe.de>, Germany
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Publice License,
* version 2 or any later. The license is contained in the COPYING
* file that comes with the cvsfs distribution.
*
* connect to cvs :ext: server
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/types.h>
#include <signal.h>
#include "cvsfs.h"
#include "cvs_ext.h"
#include "cvs_connect.h"
/* cvs_ext_connect
*
* connect to the cvs :ext: server as further described in the cvsfs_config
* configuration structure
*/
error_t
cvs_ext_connect(FILE **send, FILE **recv)
{
char port[10];
int fd_to_rsh[2], fd_from_rsh[2];
pid_t pid;
if(pipe(fd_to_rsh))
return errno;
if(pipe(fd_from_rsh))
return errno;
if((pid = fork()) < 0)
{
perror(PACKAGE ": cannot fork remote shell client");
return pid;
}
if(! pid)
{
/* okay, child process, fork to remote shell client */
close(fd_to_rsh[1]); /* close writing end */
close(fd_from_rsh[0]); /* close reading end */
if(dup2(fd_to_rsh[0], 0) < 0 || dup2(fd_from_rsh[1], 1) < 0)
{
perror(PACKAGE ": unable to dup2 pipe to stdin/stdout");
exit(1);
}
if(config.cvs_mode == EXT)
{
snprintf(port, sizeof(port), "%d",
config.cvs_port ? config.cvs_port : 22);
execlp(config.cvs_shell_client, config.cvs_shell_client,
"-p", port,
"-l", config.cvs_username, config.cvs_hostname,
"--", "cvs", "server", NULL);
}
else if(config.cvs_mode == LOCAL)
{
execlp("cvs", "cvs", "server", NULL);
}
else
{
fprintf(stderr, PACKAGE ": damn, this line was not reached.\n");
abort();
}
exit(1);
}
close(fd_to_rsh[0]);
close(fd_from_rsh[1]);
if(! ((*send = fdopen(fd_to_rsh[1], "w"))
&& (*recv = fdopen(fd_from_rsh[0], "r"))))
{
perror(PACKAGE ": unable to convert pipe's fds to file streams");
if(send)
fclose(*send);
else
close(fd_to_rsh[1]);
if(recv)
fclose(*recv);
else
close(fd_from_rsh[0]);
kill(pid, SIGTERM);
return EIO;
}
if(setvbuf(*send, NULL, _IOLBF, 0) || setvbuf(*recv, NULL, _IOLBF, 0))
{
perror(PACKAGE ": cannot force streams to be linebuffered");
fclose(*send);
fclose(*recv);
return EIO;
}
return 0;
}
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