1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/* assuan-connect.c - Establish a connection (client)
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "assuan-defs.h"
/* Connect to a server over a pipe, creating the assuan context and
returning it in CTX. The server filename is NAME, the argument
vector in ARGV. */
AssuanError
assuan_pipe_connect (ASSUAN_CONTEXT *ctx, const char *name, char *const argv[])
{
static int fixed_signals = 0;
AssuanError err;
int rp[2];
int wp[2];
int fd[2];
if (!name || !argv || !argv[0])
return ASSUAN_General_Error;
if (!fixed_signals)
{
struct sigaction act;
sigaction (SIGPIPE, NULL, &act);
if (act.sa_handler == SIG_DFL)
{
act.sa_handler = SIG_IGN;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
sigaction (SIGPIPE, &act, NULL);
}
fixed_signals = 1;
/* FIXME: This is not MT safe */
}
if (pipe (rp) < 0)
return ASSUAN_General_Error;
if (pipe (wp) < 0)
{
close (rp[0]);
close (rp[1]);
return ASSUAN_General_Error;
}
fd[0] = rp[0]; /* Our inbound is read end of read pipe. */
fd[1] = wp[1]; /* Our outbound is write end of write pipe. */
err = assuan_init_pipe_server (ctx, fd); /* FIXME: Common code should be factored out. */
if (err)
{
close (rp[0]);
close (rp[1]);
close (wp[0]);
close (wp[1]);
return err;
}
(*ctx)->pid = fork ();
if ((*ctx)->pid < 0)
{
close (rp[0]);
close (rp[1]);
close (wp[0]);
close (wp[1]);
assuan_deinit_pipe_server (*ctx); /* FIXME: Common code should be factored out. */
return ASSUAN_General_Error;
}
if ((*ctx)->pid == 0)
{
close (rp[0]);
close (wp[1]);
if (rp[1] != STDOUT_FILENO)
{
dup2 (rp[1], STDOUT_FILENO); /* Child's outbound is write end of read pipe. */
close (rp[1]);
}
if (wp[0] != STDIN_FILENO)
{
dup2 (wp[0], STDIN_FILENO); /* Child's inbound is read end of write pipe. */
close (wp[0]);
}
execv (name, argv);
_exit (1);
}
close (rp[1]);
close (wp[0]);
_assuan_read_line (*ctx); /* FIXME: Handshake. */
return 0;
}
void
assuan_pipe_disconnect (ASSUAN_CONTEXT ctx)
{
_assuan_write_line (ctx, "BYE");
close (ctx->inbound.fd);
close (ctx->outbound.fd);
waitpid (ctx->pid, NULL, 0); /* FIXME Check return value. */
assuan_deinit_pipe_server (ctx);
}
pid_t
assuan_get_pid (ASSUAN_CONTEXT ctx)
{
return ctx ? ctx->pid : -1;
}
|
