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/* fdpassing - Check the fiel descriptor passing.
* Copyright (C) 2006 Free Software Foundation, Inc.
*
* This file is part of Assuan.
*
* Assuan is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Assuan 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h> /* Used by main driver. */
#include "../src/assuan.h"
#include "common.h"
/*
S E R V E R
*/
static int
cmd_echo (assuan_context_t ctx, char *line)
{
log_info ("got ECHO command (%s)\n", line);
return 0;
}
static assuan_error_t
register_commands (assuan_context_t ctx)
{
static struct {
const char *name;
int (*handler)(assuan_context_t, char *line);
} table[] = {
{ "ECHO", cmd_echo },
{ "INPUT", NULL },
{ "OUTPUT", NULL },
{ NULL }
};
int i;
assuan_error_t rc;
for (i=0; table[i].name; i++)
{
rc = assuan_register_command (ctx, table[i].name, table[i].handler);
if (rc)
return rc;
}
return 0;
}
static void
server (int fd)
{
int rc;
assuan_context_t ctx;
log_info ("server started on fd %d\n", fd);
rc = assuan_init_domain_server (&ctx, fd, (pid_t)(-1));
if (rc)
log_fatal ("assuan_init_domain_server failed: %s\n", assuan_strerror (rc));
rc = register_commands (ctx);
if (rc)
log_fatal ("register_commands failed: %s\n", assuan_strerror(rc));
assuan_set_assuan_log_prefix (log_prefix);
assuan_set_log_stream (ctx, stderr);
for (;;)
{
rc = assuan_accept (ctx);
if (rc)
{
log_error ("assuan_accept failed: %s\n", assuan_strerror (rc));
break;
}
rc = assuan_process (ctx);
if (rc)
log_error ("assuan_process failed: %s\n", assuan_strerror (rc));
}
assuan_deinit_server (ctx);
}
/*
C L I E N T
*/
/* Client main. If true is returned, a disconnect has not been done. */
static int
client (int fd)
{
int rc;
assuan_context_t ctx;
log_info ("client started on fd %d\n", fd);
rc = assuan_domain_connect (&ctx, fd, (pid_t)(-1));
if (rc)
{
log_error ("assuan_domain_connect failed: %s\n", assuan_strerror (rc));
return -1;
}
assuan_disconnect (ctx);
return 0;
}
/*
M A I N
*/
int
main (int argc, char **argv)
{
int last_argc = -1;
const char *srcdir = getenv ("srcdir");
int fds[2];
pid_t pid;
if (!srcdir)
srcdir = ".";
if (argc)
{
log_set_prefix (*argv);
argc--; argv++;
}
while (argc && last_argc != argc )
{
last_argc = argc;
if (!strcmp (*argv, "--help"))
{
puts (
"usage: ./fdpassing [options]\n"
"\n"
" Options are --verbose and --debug");
exit (0);
}
if (!strcmp (*argv, "--verbose"))
{
verbose = 1;
argc--; argv++;
}
else if (!strcmp (*argv, "--debug"))
{
verbose = debug = 1;
argc--; argv++;
}
}
/* Create a socketpair. */
if ( socketpair (AF_LOCAL, SOCK_STREAM, 0, fds) )
log_fatal ("socketpair failed: %s\n", strerror (errno));
/* Fork and run server and client. */
pid = fork ();
if (pid == (pid_t)(-1))
log_fatal ("fork failed: %s\n", strerror (errno));
if (!pid)
{
server (fds[0]); /* The child is our server. */
log_info ("server finished\n");
}
else
{
if (client (fds[1])) /* The parent is the client. */
{
log_info ("waiting for server to terminate...\n");
waitpid (pid, NULL, 0);
}
log_info ("client finished\n");
}
return errorcount? 1:0;
}
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