1/*-
2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__RCSID("$NetBSD: posix_spawn_fileactions.c,v 1.1.2.1 2012/04/12 17:05:37 riz Exp $");
29
30#include "namespace.h"
31
32#include <errno.h>
33#include <fcntl.h>
34#include <sched.h>
35#include <signal.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <spawn.h>
40
41#define MIN_SIZE	16
42
43/*
44 * File descriptor actions
45 */
46
47int
48posix_spawn_file_actions_init(posix_spawn_file_actions_t *fa)
49{
50	if (fa == NULL)
51		return (EINVAL);
52
53	fa->fae = malloc(MIN_SIZE * sizeof(struct posix_spawn_file_actions_entry));
54	if (fa->fae == NULL)
55		return (ENOMEM);
56	fa->size = MIN_SIZE;
57	fa->len = 0;
58
59	return (0);
60}
61
62int
63posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *fa)
64{
65	unsigned int i;
66
67	if (fa == NULL)
68		return (EINVAL);
69
70	for (i = 0; i < fa->len; i++) {
71		if (fa->fae[i].fae_action == FAE_OPEN)
72			free(fa->fae[i].fae_path);
73	}
74
75	free(fa->fae);
76	return (0);
77}
78
79static int
80posix_spawn_file_actions_getentry(posix_spawn_file_actions_t *fa,
81    unsigned int *i)
82{
83	posix_spawn_file_actions_entry_t *fae;
84
85	if (fa == NULL)
86		return (EINVAL);
87
88	if (fa->len < fa->size)
89		goto out;
90
91	fae = realloc(fa->fae, (fa->size + MIN_SIZE) * sizeof(*fa->fae));
92	if (fae == NULL)
93		return (ENOMEM);
94
95	fa->fae = fae;
96	fa->size += MIN_SIZE;
97
98out:
99	*i = fa->len;
100	return (0);
101}
102
103int
104posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict fa,
105    int fildes, const char * __restrict path, int oflag, mode_t mode)
106{
107	char *faepath;
108	unsigned int i;
109	int error;
110
111	if (fildes < 0)
112		return (EBADF);
113
114	error = posix_spawn_file_actions_getentry(fa, &i);
115	if (error)
116		return (error);
117
118	faepath = strdup(path);
119	if (faepath == NULL)
120		return (ENOMEM);
121
122	fa->fae[i].fae_action = FAE_OPEN;
123	fa->fae[i].fae_path = faepath;
124	fa->fae[i].fae_fildes = fildes;
125	fa->fae[i].fae_oflag = oflag;
126	fa->fae[i].fae_mode = mode;
127	fa->len++;
128
129	return (0);
130}
131
132int
133posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa,
134    int fildes, int newfildes)
135{
136	unsigned int i;
137	int error;
138
139	if (fildes < 0 || newfildes < 0)
140		return (EBADF);
141
142	error = posix_spawn_file_actions_getentry(fa, &i);
143	if (error)
144		return (error);
145
146	fa->fae[i].fae_action = FAE_DUP2;
147	fa->fae[i].fae_fildes = fildes;
148	fa->fae[i].fae_newfildes = newfildes;
149	fa->len++;
150
151	return (0);
152}
153
154int
155posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa,
156    int fildes)
157{
158	unsigned int i;
159	int error;
160
161	if (fildes < 0)
162		return (EBADF);
163
164	error = posix_spawn_file_actions_getentry(fa, &i);
165	if (error)
166		return (error);
167
168	fa->fae[i].fae_action = FAE_CLOSE;
169	fa->fae[i].fae_fildes = fildes;
170	fa->len++;
171
172	return (0);
173}
174