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136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/* assuan-connect.c - Establish a connection (client)
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* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "assuan-defs.h"
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/* Connect to a server over a pipe, creating the assuan context and
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returning it in CTX. The server filename is NAME, the argument
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vector in ARGV. */
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AssuanError
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assuan_pipe_connect (ASSUAN_CONTEXT *ctx, const char *name, char *const argv[])
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{
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static int fixed_signals = 0;
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AssuanError err;
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int rp[2];
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int wp[2];
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int fd[2];
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if (!name || !argv || !argv[0])
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return ASSUAN_General_Error;
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if (!fixed_signals)
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{
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struct sigaction act;
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sigaction (SIGPIPE, NULL, &act);
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if (act.sa_handler == SIG_DFL)
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{
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act.sa_handler = SIG_IGN;
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sigemptyset (&act.sa_mask);
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act.sa_flags = 0;
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sigaction (SIGPIPE, &act, NULL);
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}
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fixed_signals = 1;
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/* FIXME: This is not MT safe */
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}
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if (pipe (rp) < 0)
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return ASSUAN_General_Error;
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if (pipe (wp) < 0)
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{
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close (rp[0]);
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close (rp[1]);
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return ASSUAN_General_Error;
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}
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fd[0] = rp[0]; /* Our inbound is read end of read pipe. */
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fd[1] = wp[1]; /* Our outbound is write end of write pipe. */
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err = assuan_init_pipe_server (ctx, fd); /* FIXME: Common code should be factored out. */
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if (err)
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{
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close (rp[0]);
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close (rp[1]);
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close (wp[0]);
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close (wp[1]);
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return err;
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}
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(*ctx)->pid = fork ();
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if ((*ctx)->pid < 0)
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{
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close (rp[0]);
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close (rp[1]);
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close (wp[0]);
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close (wp[1]);
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assuan_deinit_pipe_server (*ctx); /* FIXME: Common code should be factored out. */
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return ASSUAN_General_Error;
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}
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if ((*ctx)->pid == 0)
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{
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close (rp[0]);
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close (wp[1]);
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if (rp[1] != STDOUT_FILENO)
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{
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dup2 (rp[1], STDOUT_FILENO); /* Child's outbound is write end of read pipe. */
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close (rp[1]);
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}
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if (wp[0] != STDIN_FILENO)
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{
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dup2 (wp[0], STDIN_FILENO); /* Child's inbound is read end of write pipe. */
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close (wp[0]);
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}
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execv (name, argv);
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_exit (1);
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}
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close (rp[1]);
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close (wp[0]);
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_assuan_read_line (*ctx); /* FIXME: Handshake. */
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return 0;
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}
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void
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assuan_pipe_disconnect (ASSUAN_CONTEXT ctx)
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{
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_assuan_write_line (ctx, "BYE");
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close (ctx->inbound.fd);
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close (ctx->outbound.fd);
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waitpid (ctx->pid, NULL, 0); /* FIXME Check return value. */
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assuan_deinit_pipe_server (ctx);
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}
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pid_t
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assuan_get_pid (ASSUAN_CONTEXT ctx)
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{
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return ctx ? ctx->pid : -1;
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}
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