archive_write_add_filter_lrzip.c revision 302408 
1/*-
2 * Copyright (c) 2003-2007 Tim Kientzle
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(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "archive_platform.h"
27
28__FBSDID("$FreeBSD$");
29
30#ifdef HAVE_ERRNO_H
31#include <errno.h>
32#endif
33#ifdef HAVE_STDLIB_H
34#include <stdlib.h>
35#endif
36#ifdef HAVE_STRING_H
37#include <string.h>
38#endif
39
40#include "archive.h"
41#include "archive_string.h"
42#include "archive_write_private.h"
43
44struct write_lrzip {
45	struct archive_write_program_data *pdata;
46	int	compression_level;
47	enum { lzma = 0, bzip2, gzip, lzo, none, zpaq } compression;
48};
49
50static int archive_write_lrzip_open(struct archive_write_filter *);
51static int archive_write_lrzip_options(struct archive_write_filter *,
52		    const char *, const char *);
53static int archive_write_lrzip_write(struct archive_write_filter *,
54		    const void *, size_t);
55static int archive_write_lrzip_close(struct archive_write_filter *);
56static int archive_write_lrzip_free(struct archive_write_filter *);
57
58int
59archive_write_add_filter_lrzip(struct archive *_a)
60{
61	struct archive_write_filter *f = __archive_write_allocate_filter(_a);
62	struct write_lrzip *data;
63
64	archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
65	    ARCHIVE_STATE_NEW, "archive_write_add_filter_lrzip");
66
67	data = calloc(1, sizeof(*data));
68	if (data == NULL) {
69		archive_set_error(_a, ENOMEM, "Can't allocate memory");
70		return (ARCHIVE_FATAL);
71	}
72	data->pdata = __archive_write_program_allocate("lrzip");
73	if (data->pdata == NULL) {
74		free(data);
75		archive_set_error(_a, ENOMEM, "Can't allocate memory");
76		return (ARCHIVE_FATAL);
77	}
78
79	f->name = "lrzip";
80	f->code = ARCHIVE_FILTER_LRZIP;
81	f->data = data;
82	f->open = archive_write_lrzip_open;
83	f->options = archive_write_lrzip_options;
84	f->write = archive_write_lrzip_write;
85	f->close = archive_write_lrzip_close;
86	f->free = archive_write_lrzip_free;
87
88	/* Note: This filter always uses an external program, so we
89	 * return "warn" to inform of the fact. */
90	archive_set_error(_a, ARCHIVE_ERRNO_MISC,
91	    "Using external lrzip program for lrzip compression");
92	return (ARCHIVE_WARN);
93}
94
95static int
96archive_write_lrzip_options(struct archive_write_filter *f, const char *key,
97    const char *value)
98{
99	struct write_lrzip *data = (struct write_lrzip *)f->data;
100
101	if (strcmp(key, "compression") == 0) {
102		if (value == NULL)
103			return (ARCHIVE_WARN);
104		else if (strcmp(value, "bzip2") == 0)
105			data->compression = bzip2;
106		else if (strcmp(value, "gzip") == 0)
107			data->compression = gzip;
108		else if (strcmp(value, "lzo") == 0)
109			data->compression = lzo;
110		else if (strcmp(value, "none") == 0)
111			data->compression = none;
112		else if (strcmp(value, "zpaq") == 0)
113			data->compression = zpaq;
114		else
115			return (ARCHIVE_WARN);
116		return (ARCHIVE_OK);
117	} else if (strcmp(key, "compression-level") == 0) {
118		if (value == NULL || !(value[0] >= '1' && value[0] <= '9') ||
119		    value[1] != '\0')
120			return (ARCHIVE_WARN);
121		data->compression_level = value[0] - '0';
122		return (ARCHIVE_OK);
123	}
124	/* Note: The "warn" return is just to inform the options
125	 * supervisor that we didn't handle it.  It will generate
126	 * a suitable error if no one used this option. */
127	return (ARCHIVE_WARN);
128}
129
130static int
131archive_write_lrzip_open(struct archive_write_filter *f)
132{
133	struct write_lrzip *data = (struct write_lrzip *)f->data;
134	struct archive_string as;
135	int r;
136
137	archive_string_init(&as);
138	archive_strcpy(&as, "lrzip -q");
139
140	/* Specify compression type. */
141	switch (data->compression) {
142	case lzma:/* default compression */
143		break;
144	case bzip2:
145		archive_strcat(&as, " -b");
146		break;
147	case gzip:
148		archive_strcat(&as, " -g");
149		break;
150	case lzo:
151		archive_strcat(&as, " -l");
152		break;
153	case none:
154		archive_strcat(&as, " -n");
155		break;
156	case zpaq:
157		archive_strcat(&as, " -z");
158		break;
159	}
160
161	/* Specify compression level. */
162	if (data->compression_level > 0) {
163		archive_strcat(&as, " -L ");
164		archive_strappend_char(&as, '0' + data->compression_level);
165	}
166
167	r = __archive_write_program_open(f, data->pdata, as.s);
168	archive_string_free(&as);
169	return (r);
170}
171
172static int
173archive_write_lrzip_write(struct archive_write_filter *f,
174    const void *buff, size_t length)
175{
176	struct write_lrzip *data = (struct write_lrzip *)f->data;
177
178	return __archive_write_program_write(f, data->pdata, buff, length);
179}
180
181static int
182archive_write_lrzip_close(struct archive_write_filter *f)
183{
184	struct write_lrzip *data = (struct write_lrzip *)f->data;
185
186	return __archive_write_program_close(f, data->pdata);
187}
188
189static int
190archive_write_lrzip_free(struct archive_write_filter *f)
191{
192	struct write_lrzip *data = (struct write_lrzip *)f->data;
193
194	__archive_write_program_free(data->pdata);
195	free(data);
196	return (ARCHIVE_OK);
197}
198