mdw@git.distorted.org.uk Git - shells/blob - cvssh.c

   1 /* -*-c-*-
   2  *
   3  * $Id$
   4  *
   5  * Login shell for an anonymous CVS user
   6  *
   7  * (c) 1999 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <sys/types.h>
  34 #include <netdb.h>
  35 #include <unistd.h>
  36 #include <pwd.h>
  37 #include <sys/utsname.h>
  38
  39 /*----- Main code ---------------------------------------------------------*/
  40
  41 const static char help[] = "\
  42 Welcome to the anonymous CVS server.\n\
  43 \n\
  44 To use the CVS server, set your `CVSROOT' environment variable to\n\
  45 `%s@%s:%s', and use the `cvs checkout' and `cvs update'\n\
  46 commands.  See the manual for more information on how to use CVS.\n\
  47 ";
  48
  49 void dummy(void)
  50 {
  51   char *p;
  52   char *host;
  53   char *home;
  54
  55   home = getenv("HOME");
  56   p = getenv("USER");
  57
  58   if (!p || !home) {
  59     struct passwd *pw = getpwuid(getuid());
  60     if (!p)
  61       p = (pw ? pw->pw_name : "anoncvs");
  62     if (!home)
  63       home = (pw ? pw->pw_dir : "/cvs");
  64   }
  65
  66   {
  67     struct utsname u;
  68     struct hostent *h;
  69     uname(&u);
  70     h = gethostbyname(u.nodename);
  71     if (h)
  72       host = h->h_name;
  73     else
  74       host = u.nodename;
  75   }
  76
  77   printf(help, p, host, home);
  78   exit(0);
  79 }
  80
  81 int main(int argc, char *argv[])
  82 {
  83   if (argc == 2 && (strcmp(argv[1], ".ssh/rc")) == 0)
  84     exit(0);
  85   if (argc != 3 || strcmp(argv[1], "-c") || strcmp(argv[2], "cvs server"))
  86     dummy();
  87   execl("/bin/cvs", "cvs", "-A", "server", (char *)0);
  88   perror("cvssh (exec)");
  89   exit(1);
  90 }
  91
  92 /*----- That's all, folks -------------------------------------------------*/