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author | Glenn L McGrath <bug1@ihug.co.nz> | 2001-06-13 07:34:03 +0000 |
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committer | Glenn L McGrath <bug1@ihug.co.nz> | 2001-06-13 07:34:03 +0000 |
commit | 17822cd60aaf9333a9895494edcf03a0037de54c (patch) | |
tree | 3bf667fdf5b78df26acfc662955d7e38f3c5c4d5 /libbb/untar.c | |
parent | 9aff9036035fbed074e8e711b96c5c934e668884 (diff) | |
download | busybox-w32-17822cd60aaf9333a9895494edcf03a0037de54c.tar.gz busybox-w32-17822cd60aaf9333a9895494edcf03a0037de54c.tar.bz2 busybox-w32-17822cd60aaf9333a9895494edcf03a0037de54c.zip |
Reorganise unarchive functions, new files, removed some
Diffstat (limited to '')
-rw-r--r-- | libbb/untar.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/libbb/untar.c b/libbb/untar.c deleted file mode 100644 index b6b44967f..000000000 --- a/libbb/untar.c +++ /dev/null | |||
@@ -1,225 +0,0 @@ | |||
1 | /* | ||
2 | * This program is free software; you can redistribute it and/or modify | ||
3 | * it under the terms of the GNU General Public License as published by | ||
4 | * the Free Software Foundation; either version 2 of the License, or | ||
5 | * (at your option) any later version. | ||
6 | * | ||
7 | * This program is distributed in the hope that it will be useful, | ||
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
10 | * GNU Library General Public License for more details. | ||
11 | * | ||
12 | * You should have received a copy of the GNU General Public License | ||
13 | * along with this program; if not, write to the Free Software | ||
14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
15 | * | ||
16 | * NOTE: This is used by deb_extract to avoid calling the whole tar applet. | ||
17 | * Its functionality should be merged with tar to avoid duplication | ||
18 | */ | ||
19 | |||
20 | #include <stdlib.h> | ||
21 | #include <string.h> | ||
22 | #include <unistd.h> | ||
23 | #include "libbb.h" | ||
24 | |||
25 | /* | ||
26 | * stdout can be redircted to FILE *output | ||
27 | * If const char *file_prefix isnt NULL is prepended to all the extracted filenames. | ||
28 | * The purpose of const char *argument depends on the value of const int untar_function | ||
29 | */ | ||
30 | |||
31 | extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, | ||
32 | const char *argument, const char *file_prefix) | ||
33 | { | ||
34 | typedef struct raw_tar_header { | ||
35 | char name[100]; /* 0-99 */ | ||
36 | char mode[8]; /* 100-107 */ | ||
37 | char uid[8]; /* 108-115 */ | ||
38 | char gid[8]; /* 116-123 */ | ||
39 | char size[12]; /* 124-135 */ | ||
40 | char mtime[12]; /* 136-147 */ | ||
41 | char chksum[8]; /* 148-155 */ | ||
42 | char typeflag; /* 156-156 */ | ||
43 | char linkname[100]; /* 157-256 */ | ||
44 | char magic[6]; /* 257-262 */ | ||
45 | char version[2]; /* 263-264 */ | ||
46 | char uname[32]; /* 265-296 */ | ||
47 | char gname[32]; /* 297-328 */ | ||
48 | char devmajor[8]; /* 329-336 */ | ||
49 | char devminor[8]; /* 337-344 */ | ||
50 | char prefix[155]; /* 345-499 */ | ||
51 | char padding[12]; /* 500-512 */ | ||
52 | } raw_tar_header_t; | ||
53 | |||
54 | raw_tar_header_t raw_tar_header; | ||
55 | unsigned char *temp = (unsigned char *) &raw_tar_header; | ||
56 | long i; | ||
57 | long next_header_offset = 0; | ||
58 | long uncompressed_count = 0; | ||
59 | size_t size; | ||
60 | mode_t mode; | ||
61 | |||
62 | while (fread((char *) &raw_tar_header, 1, 512, src_tar_file) == 512) { | ||
63 | long sum = 0; | ||
64 | |||
65 | if (ferror(src_tar_file) || feof(src_tar_file)) { | ||
66 | perror_msg("untar: "); | ||
67 | break; | ||
68 | } | ||
69 | |||
70 | uncompressed_count += 512; | ||
71 | |||
72 | /* Check header has valid magic */ | ||
73 | if (strncmp(raw_tar_header.magic, "ustar", 5) != 0) { | ||
74 | /* | ||
75 | * FIXME, Need HELP with this | ||
76 | * | ||
77 | * This has to fail silently or it incorrectly reports errors when called from | ||
78 | * deb_extract. | ||
79 | * The problem is deb_extract decompresses the .gz file in a child process and | ||
80 | * untar reads from the child proccess. The child process finishes and exits, | ||
81 | * but fread reads 0's from the src_tar_file even though the child | ||
82 | * closed its handle. | ||
83 | */ | ||
84 | // error_msg("Invalid tar magic"); | ||
85 | break; | ||
86 | } | ||
87 | |||
88 | /* Do checksum on headers */ | ||
89 | for (i = 0; i < 148 ; i++) { | ||
90 | sum += temp[i]; | ||
91 | } | ||
92 | sum += ' ' * 8; | ||
93 | for (i = 156; i < 512 ; i++) { | ||
94 | sum += temp[i]; | ||
95 | } | ||
96 | if (sum != strtol(raw_tar_header.chksum, NULL, 8)) { | ||
97 | error_msg("Invalid tar header checksum"); | ||
98 | break; | ||
99 | } | ||
100 | |||
101 | /* convert to type'ed variables */ | ||
102 | size = strtol(raw_tar_header.size, NULL, 8); | ||
103 | parse_mode(raw_tar_header.mode, &mode); | ||
104 | |||
105 | /* start of next header is at */ | ||
106 | next_header_offset = uncompressed_count + size; | ||
107 | if (size % 512 != 0) { | ||
108 | next_header_offset += (512 - size % 512); | ||
109 | } | ||
110 | |||
111 | /* If an exclude list is specified check current file against list */ | ||
112 | #if 0 | ||
113 | if (*exclude_list != NULL) { | ||
114 | i = 0; | ||
115 | while (exclude_list[i] != 0) { | ||
116 | if (strncmp(exclude_list[i], raw_tar_header.name, strlen(raw_tar_header.name)) == 0) { | ||
117 | break; | ||
118 | } | ||
119 | i++; | ||
120 | } | ||
121 | if (exclude_list[i] != 0) { | ||
122 | continue; | ||
123 | } | ||
124 | } | ||
125 | #endif | ||
126 | if (untar_function & (extract_contents | extract_verbose_extract | extract_contents_to_file)) { | ||
127 | fprintf(output, "%s\n", raw_tar_header.name); | ||
128 | } | ||
129 | |||
130 | switch (raw_tar_header.typeflag ) { | ||
131 | case '0': | ||
132 | case '\0': { | ||
133 | /* If the name ends in a '/' then assume it is | ||
134 | * supposed to be a directory, and fall through | ||
135 | */ | ||
136 | int name_length = strlen(raw_tar_header.name); | ||
137 | if (raw_tar_header.name[name_length - 1] != '/') { | ||
138 | switch (untar_function) { | ||
139 | case (extract_extract): | ||
140 | case (extract_verbose_extract): | ||
141 | case (extract_control): { | ||
142 | FILE *dst_file = NULL; | ||
143 | char *full_name; | ||
144 | |||
145 | if (file_prefix != NULL) { | ||
146 | full_name = xmalloc(strlen(argument) + strlen(file_prefix) + name_length + 3); | ||
147 | sprintf(full_name, "%s/%s.%s", argument, file_prefix, strrchr(raw_tar_header.name, '/') + 1); | ||
148 | } else { | ||
149 | full_name = concat_path_file(argument, raw_tar_header.name); | ||
150 | } | ||
151 | dst_file = wfopen(full_name, "w"); | ||
152 | copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size); | ||
153 | uncompressed_count += size; | ||
154 | fclose(dst_file); | ||
155 | chmod(full_name, mode); | ||
156 | free(full_name); | ||
157 | } | ||
158 | break; | ||
159 | case (extract_info): | ||
160 | if (strstr(raw_tar_header.name, argument) != NULL) { | ||
161 | copy_file_chunk(src_tar_file, stdout, (unsigned long long) size); | ||
162 | uncompressed_count += size; | ||
163 | } | ||
164 | break; | ||
165 | case (extract_field): | ||
166 | if (strstr(raw_tar_header.name, "./control") != NULL) { | ||
167 | return(read_text_file_to_buffer(src_tar_file)); | ||
168 | } | ||
169 | break; | ||
170 | } | ||
171 | break; | ||
172 | } | ||
173 | } | ||
174 | case '5': | ||
175 | if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { | ||
176 | int ret; | ||
177 | char *dir; | ||
178 | dir = concat_path_file(argument, raw_tar_header.name); | ||
179 | ret = create_path(dir, mode); | ||
180 | free(dir); | ||
181 | if (ret == FALSE) { | ||
182 | perror_msg("%s: Cannot mkdir", raw_tar_header.name); | ||
183 | return NULL; | ||
184 | } | ||
185 | chmod(dir, mode); | ||
186 | } | ||
187 | break; | ||
188 | case '1': | ||
189 | if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { | ||
190 | if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) { | ||
191 | perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname); | ||
192 | return NULL; | ||
193 | } | ||
194 | } | ||
195 | break; | ||
196 | case '2': | ||
197 | if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { | ||
198 | if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) { | ||
199 | perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname); | ||
200 | return NULL; | ||
201 | } | ||
202 | } | ||
203 | break; | ||
204 | case '3': | ||
205 | case '4': | ||
206 | case '6': | ||
207 | // if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE) | ||
208 | // errorFlag=TRUE; | ||
209 | // break; | ||
210 | default: | ||
211 | error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag); | ||
212 | return NULL; | ||
213 | } | ||
214 | /* | ||
215 | * Seek to start of next block, cant use fseek as unzip() does support it | ||
216 | */ | ||
217 | while (uncompressed_count < next_header_offset) { | ||
218 | if (fgetc(src_tar_file) == EOF) { | ||
219 | break; | ||
220 | } | ||
221 | uncompressed_count++; | ||
222 | } | ||
223 | } | ||
224 | return NULL; | ||
225 | } | ||