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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  * $FreeBSD$
26  */
27
28 #ifndef ARCHIVE_WRITE_PRIVATE_H_INCLUDED
29 #define ARCHIVE_WRITE_PRIVATE_H_INCLUDED
30
31 #ifndef __LIBARCHIVE_BUILD
32 #ifndef __LIBARCHIVE_TEST
33 #error This header is only to be used internally to libarchive.
34 #endif
35 #endif
36
37 #include "archive.h"
38 #include "archive_string.h"
39 #include "archive_private.h"
40
41 #define ARCHIVE_WRITE_FILTER_STATE_NEW          1U
42 #define ARCHIVE_WRITE_FILTER_STATE_OPEN         2U
43 #define ARCHIVE_WRITE_FILTER_STATE_CLOSED       4U
44 #define ARCHIVE_WRITE_FILTER_STATE_FATAL        0x8000U
45
46 struct archive_write;
47
48 struct archive_write_filter {
49         int64_t bytes_written;
50         struct archive *archive; /* Associated archive. */
51         struct archive_write_filter *next_filter; /* Who I write to. */
52         int     (*options)(struct archive_write_filter *,
53             const char *key, const char *value);
54         int     (*open)(struct archive_write_filter *);
55         int     (*write)(struct archive_write_filter *, const void *, size_t);
56         int     (*close)(struct archive_write_filter *);
57         int     (*free)(struct archive_write_filter *);
58         void     *data;
59         const char *name;
60         int       code;
61         int       bytes_per_block;
62         int       bytes_in_last_block;
63         int       state;
64 };
65
66 #if ARCHIVE_VERSION < 4000000
67 void __archive_write_filters_free(struct archive *);
68 #endif
69
70 struct archive_write_filter *__archive_write_allocate_filter(struct archive *);
71
72 int __archive_write_output(struct archive_write *, const void *, size_t);
73 int __archive_write_nulls(struct archive_write *, size_t);
74 int __archive_write_filter(struct archive_write_filter *, const void *, size_t);
75
76 struct archive_write {
77         struct archive  archive;
78
79         /* Dev/ino of the archive being written. */
80         int               skip_file_set;
81         int64_t           skip_file_dev;
82         int64_t           skip_file_ino;
83
84         /* Utility:  Pointer to a block of nulls. */
85         const unsigned char     *nulls;
86         size_t                   null_length;
87
88         /* Callbacks to open/read/write/close archive stream. */
89         archive_open_callback   *client_opener;
90         archive_write_callback  *client_writer;
91         archive_close_callback  *client_closer;
92         archive_free_callback   *client_freer;
93         void                    *client_data;
94
95         /*
96          * Blocking information.  Note that bytes_in_last_block is
97          * misleadingly named; I should find a better name.  These
98          * control the final output from all compressors, including
99          * compression_none.
100          */
101         int               bytes_per_block;
102         int               bytes_in_last_block;
103
104         /*
105          * First and last write filters in the pipeline.
106          */
107         struct archive_write_filter *filter_first;
108         struct archive_write_filter *filter_last;
109
110         /*
111          * Pointers to format-specific functions for writing.  They're
112          * initialized by archive_write_set_format_XXX() calls.
113          */
114         void     *format_data;
115         const char *format_name;
116         int     (*format_init)(struct archive_write *);
117         int     (*format_options)(struct archive_write *,
118                     const char *key, const char *value);
119         int     (*format_finish_entry)(struct archive_write *);
120         int     (*format_write_header)(struct archive_write *,
121                     struct archive_entry *);
122         ssize_t (*format_write_data)(struct archive_write *,
123                     const void *buff, size_t);
124         int     (*format_close)(struct archive_write *);
125         int     (*format_free)(struct archive_write *);
126
127
128         /*
129          * Encryption passphrase.
130          */
131         char            *passphrase;
132         archive_passphrase_callback *passphrase_callback;
133         void            *passphrase_client_data;
134 };
135
136 /*
137  * Utility function to format a USTAR header into a buffer.  If
138  * "strict" is set, this tries to create the absolutely most portable
139  * version of a ustar header.  If "strict" is set to 0, then it will
140  * relax certain requirements.
141  *
142  * Generally, format-specific declarations don't belong in this
143  * header; this is a rare example of a function that is shared by
144  * two very similar formats (ustar and pax).
145  */
146 int
147 __archive_write_format_header_ustar(struct archive_write *, char buff[512],
148     struct archive_entry *, int tartype, int strict,
149     struct archive_string_conv *);
150
151 struct archive_write_program_data;
152 struct archive_write_program_data * __archive_write_program_allocate(const char *program_name);
153 int     __archive_write_program_free(struct archive_write_program_data *);
154 int     __archive_write_program_open(struct archive_write_filter *,
155             struct archive_write_program_data *, const char *);
156 int     __archive_write_program_close(struct archive_write_filter *,
157             struct archive_write_program_data *);
158 int     __archive_write_program_write(struct archive_write_filter *,
159             struct archive_write_program_data *, const void *, size_t);
160
161 /*
162  * Get a encryption passphrase.
163  */
164 const char * __archive_write_get_passphrase(struct archive_write *a);
165 #endif