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[shells] / cvssh.c

/* -*-c-*-
 *
 * $Id$
 *
 * Login shell for an anonymous CVS user
 *
 * (c) 1999 Mark Wooding
 */

/*----- Licensing notice --------------------------------------------------* 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*----- Header files ------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <netdb.h>
#include <unistd.h>
#include <pwd.h>
#include <sys/utsname.h>

/*----- Main code ---------------------------------------------------------*/

const static char help[] = "\
Welcome to the anonymous CVS server.\n\
\n\
To use the CVS server, set your `CVSROOT' environment variable to\n\
`%s@%s:%s', and use the `cvs checkout' and `cvs update'\n\
commands.  See the manual for more information on how to use CVS.\n\
";

void dummy(void)
{
  char *p;
  char *host;
  char *home;

  home = getenv("HOME");
  p = getenv("USER");

  if (!p || !home) {
    struct passwd *pw = getpwuid(getuid());
    if (!p)
      p = (pw ? pw->pw_name : "anoncvs");
    if (!home)
      home = (pw ? pw->pw_dir : "/cvs");
  }

  {
    struct utsname u;
    struct hostent *h;
    uname(&u);
    h = gethostbyname(u.nodename);
    if (h)
      host = h->h_name;
    else
      host = u.nodename;
  }

  printf(help, p, host, home);
  exit(0);
}

int main(int argc, char *argv[])
{
  if (argc == 2 && (strcmp(argv[1], ".ssh/rc")) == 0)
    exit(0);
  if (argc != 3 || strcmp(argv[1], "-c") || strcmp(argv[2], "cvs server"))
    dummy();
  execl("/bin/cvs", "cvs", "-A", "server", (char *)0);
  perror("cvssh (exec)");
  exit(1);
}

/*----- That's all, folks -------------------------------------------------*/