assuan/src/assuan-connect.c

   1 /* assuan-connect.c - Establish a connection (client)
   2  *      Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3  *
   4  * This file is part of Assuan.
   5  *
   6  * Assuan is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as
   8  * published by the Free Software Foundation; either version 2.1 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * Assuan is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <signal.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 #include <sys/types.h>
  31 #ifndef HAVE_W32_SYSTEM
  32 #include <sys/wait.h>
  33 #endif
  34
  35 #include "assuan-defs.h"
  36
  37 /* Disconnect and release the context CTX. */
  38 void
  39 assuan_disconnect (assuan_context_t ctx)
  40 {
  41   if (ctx)
  42     {
  43       assuan_write_line (ctx, "BYE");
  44       ctx->finish_handler (ctx);
  45       ctx->deinit_handler (ctx);
  46       ctx->deinit_handler = NULL;
  47       _assuan_release_context (ctx);
  48     }
  49 }
  50
  51 /* Return the PID of the peer or -1 if not known. This function works
  52    in some situations where assuan_get_ucred fails. */
  53 pid_t
  54 assuan_get_pid (assuan_context_t ctx)
  55 {
  56   return (ctx && ctx->pid)? ctx->pid : -1;
  57 }
  58
  59
  60 #ifndef HAVE_W32_SYSTEM
  61 /* Return user credentials. PID, UID and GID may be given as NULL if
  62    you are not interested in a value.  For getting the pid of the
  63    peer the assuan_get_pid is usually better suited. */
  64 assuan_error_t
  65 assuan_get_peercred (assuan_context_t ctx, pid_t *pid, uid_t *uid, gid_t *gid)
  66 {
  67   if (!ctx)
  68     return _assuan_error (ASSUAN_Invalid_Value);
  69   if (!ctx->peercred.valid)
  70     return _assuan_error (ASSUAN_General_Error);
  71
  72 #ifdef HAVE_SO_PEERCRED
  73   if (pid)
  74     *pid = ctx->peercred.pid;
  75   if (uid)
  76     *uid = ctx->peercred.uid;
  77   if (gid)
  78     *gid = ctx->peercred.gid;
  79 #endif
  80
  81   return 0;
  82 }
  83 #endif /* HAVE_W32_SYSTEM */