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#ifdef HAVE_ERRNO_H
29#include <errno.h>
30#endif
31#ifdef HAVE_STDLIB_H
32#include <stdlib.h>
33#endif
34#ifdef HAVE_STRING_H
35#include <string.h>
36#endif
37
38#include "archive.h"
39#include "archive_string.h"
40#include "archive_write_private.h"
41
42struct write_lrzip {
43	struct archive_write_program_data *pdata;
44	int	compression_level;
45	enum { lzma = 0, bzip2, gzip, lzo, none, zpaq } compression;
46};
47
48static int archive_write_lrzip_open(struct archive_write_filter *);
49static int archive_write_lrzip_options(struct archive_write_filter *,
50		    const char *, const char *);
51static int archive_write_lrzip_write(struct archive_write_filter *,
52		    const void *, size_t);
53static int archive_write_lrzip_close(struct archive_write_filter *);
54static int archive_write_lrzip_free(struct archive_write_filter *);
55
56int
57archive_write_add_filter_lrzip(struct archive *_a)
58{
59	struct archive_write_filter *f = __archive_write_allocate_filter(_a);
60	struct write_lrzip *data;
61
62	archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
63	    ARCHIVE_STATE_NEW, "archive_write_add_filter_lrzip");
64
65	data = calloc(1, sizeof(*data));
66	if (data == NULL) {
67		archive_set_error(_a, ENOMEM, "Can't allocate memory");
68		return (ARCHIVE_FATAL);
69	}
70	data->pdata = __archive_write_program_allocate("lrzip");
71	if (data->pdata == NULL) {
72		free(data);
73		archive_set_error(_a, ENOMEM, "Can't allocate memory");
74		return (ARCHIVE_FATAL);
75	}
76
77	f->name = "lrzip";
78	f->code = ARCHIVE_FILTER_LRZIP;
79	f->data = data;
80	f->open = archive_write_lrzip_open;
81	f->options = archive_write_lrzip_options;
82	f->write = archive_write_lrzip_write;
83	f->close = archive_write_lrzip_close;
84	f->free = archive_write_lrzip_free;
85
86	/* Note: This filter always uses an external program, so we
87	 * return "warn" to inform of the fact. */
88	archive_set_error(_a, ARCHIVE_ERRNO_MISC,
89	    "Using external lrzip program for lrzip compression");
90	return (ARCHIVE_WARN);
91}
92
93static int
94archive_write_lrzip_options(struct archive_write_filter *f, const char *key,
95    const char *value)
96{
97	struct write_lrzip *data = (struct write_lrzip *)f->data;
98
99	if (strcmp(key, "compression") == 0) {
100		if (value == NULL)
101			return (ARCHIVE_WARN);
102		else if (strcmp(value, "bzip2") == 0)
103			data->compression = bzip2;
104		else if (strcmp(value, "gzip") == 0)
105			data->compression = gzip;
106		else if (strcmp(value, "lzo") == 0)
107			data->compression = lzo;
108		else if (strcmp(value, "none") == 0)
109			data->compression = none;
110		else if (strcmp(value, "zpaq") == 0)
111			data->compression = zpaq;
112		else
113			return (ARCHIVE_WARN);
114		return (ARCHIVE_OK);
115	} else if (strcmp(key, "compression-level") == 0) {
116		if (value == NULL || !(value[0] >= '1' && value[0] <= '9') ||
117		    value[1] != '\0')
118			return (ARCHIVE_WARN);
119		data->compression_level = value[0] - '0';
120		return (ARCHIVE_OK);
121	}
122	/* Note: The "warn" return is just to inform the options
123	 * supervisor that we didn't handle it.  It will generate
124	 * a suitable error if no one used this option. */
125	return (ARCHIVE_WARN);
126}
127
128static int
129archive_write_lrzip_open(struct archive_write_filter *f)
130{
131	struct write_lrzip *data = (struct write_lrzip *)f->data;
132	struct archive_string as;
133	int r;
134
135	archive_string_init(&as);
136	archive_strcpy(&as, "lrzip -q");
137
138	/* Specify compression type. */
139	switch (data->compression) {
140	case lzma:/* default compression */
141		break;
142	case bzip2:
143		archive_strcat(&as, " -b");
144		break;
145	case gzip:
146		archive_strcat(&as, " -g");
147		break;
148	case lzo:
149		archive_strcat(&as, " -l");
150		break;
151	case none:
152		archive_strcat(&as, " -n");
153		break;
154	case zpaq:
155		archive_strcat(&as, " -z");
156		break;
157	}
158
159	/* Specify compression level. */
160	if (data->compression_level > 0) {
161		archive_strcat(&as, " -L ");
162		archive_strappend_char(&as, '0' + data->compression_level);
163	}
164
165	r = __archive_write_program_open(f, data->pdata, as.s);
166	archive_string_free(&as);
167	return (r);
168}
169
170static int
171archive_write_lrzip_write(struct archive_write_filter *f,
172    const void *buff, size_t length)
173{
174	struct write_lrzip *data = (struct write_lrzip *)f->data;
175
176	return __archive_write_program_write(f, data->pdata, buff, length);
177}
178
179static int
180archive_write_lrzip_close(struct archive_write_filter *f)
181{
182	struct write_lrzip *data = (struct write_lrzip *)f->data;
183
184	return __archive_write_program_close(f, data->pdata);
185}
186
187static int
188archive_write_lrzip_free(struct archive_write_filter *f)
189{
190	struct write_lrzip *data = (struct write_lrzip *)f->data;
191
192	__archive_write_program_free(data->pdata);
193	free(data);
194	return (ARCHIVE_OK);
195}
196