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51#include "libbb.h"
52#include "bb_archive.h"
53#include "ar_.h"
54
55#if ENABLE_FEATURE_AR_CREATE
56
57static char FAST_FUNC filter_replaceable(archive_handle_t *handle)
58{
59 if (find_list_entry(handle->accept, handle->file_header->name))
60 return EXIT_FAILURE;
61
62 return EXIT_SUCCESS;
63}
64
65static void output_ar_header(archive_handle_t *handle)
66{
67
68
69
70
71
72
73
74 enum {
75
76 MAX11CHARS = UINT_MAX > 0xffffffff ? (unsigned)99999999999 : UINT_MAX-1,
77
78 MAX10CHARS = UINT_MAX > 0xffffffff ? (unsigned)9999999999 : UINT_MAX-1,
79 };
80
81 struct file_header_t *fh = handle->file_header;
82
83 if (handle->offset & 1) {
84 xwrite(handle->src_fd, "\n", 1);
85 handle->offset++;
86 }
87
88
89 if (sizeof(off_t) > 4 && fh->size > (off_t)MAX10CHARS) {
90 bb_error_msg_and_die("'%s' is bigger than ar can handle", fh->name);
91 }
92 fdprintf(handle->src_fd, "%-16.16s%-12lu%-6u%-6u%-8o%-10"OFF_FMT"u`\n",
93 fh->name,
94 (sizeof(time_t) > 4 && fh->mtime > MAX11CHARS) ? (long)0 : (long)fh->mtime,
95 fh->uid > 99999 ? 0 : (int)fh->uid,
96 fh->gid > 99999 ? 0 : (int)fh->gid,
97 (int)fh->mode & 07777777,
98 fh->size
99 );
100
101 handle->offset += AR_HEADER_LEN;
102}
103
104
105
106
107
108static void FAST_FUNC copy_data(archive_handle_t *handle)
109{
110 archive_handle_t *out_handle = handle->ar__out;
111 struct file_header_t *fh = handle->file_header;
112
113 out_handle->file_header = fh;
114 output_ar_header(out_handle);
115
116 bb_copyfd_exact_size(handle->src_fd, out_handle->src_fd, fh->size);
117 out_handle->offset += fh->size;
118}
119
120static int write_ar_header(archive_handle_t *handle)
121{
122 char *fn;
123 char fn_h[17];
124 struct stat st;
125 int fd;
126
127 fn = llist_pop(&handle->accept);
128 if (!fn)
129 return -1;
130
131 xstat(fn, &st);
132
133 handle->file_header->mtime = st.st_mtime;
134 handle->file_header->uid = st.st_uid;
135 handle->file_header->gid = st.st_gid;
136 handle->file_header->mode = st.st_mode;
137 handle->file_header->size = st.st_size;
138 handle->file_header->name = fn_h;
139
140 sprintf(fn_h, "%.15s/", bb_basename(fn));
141
142 output_ar_header(handle);
143
144 fd = xopen(fn, O_RDONLY);
145 bb_copyfd_exact_size(fd, handle->src_fd, st.st_size);
146 close(fd);
147 handle->offset += st.st_size;
148
149 return 0;
150}
151
152static int write_ar_archive(archive_handle_t *handle)
153{
154 struct stat st;
155 archive_handle_t *out_handle;
156
157 xfstat(handle->src_fd, &st, handle->ar__name);
158
159
160
161
162 if (st.st_size != 0) {
163 out_handle = init_handle();
164 xunlink(handle->ar__name);
165 out_handle->src_fd = xopen(handle->ar__name, O_WRONLY | O_CREAT | O_TRUNC);
166 out_handle->accept = handle->accept;
167 } else {
168 out_handle = handle;
169 }
170
171 handle->ar__out = out_handle;
172
173 xwrite(out_handle->src_fd, AR_MAGIC "\n", AR_MAGIC_LEN + 1);
174 out_handle->offset += AR_MAGIC_LEN + 1;
175
176
177 if (st.st_size != 0) {
178 handle->filter = filter_replaceable;
179 handle->action_data = copy_data;
180 unpack_ar_archive(handle);
181 }
182
183 while (write_ar_header(out_handle) == 0)
184 continue;
185
186
187 if (ENABLE_FEATURE_CLEAN_UP) {
188 close(handle->src_fd);
189 if (out_handle->src_fd != handle->src_fd)
190 close(out_handle->src_fd);
191 }
192
193 return EXIT_SUCCESS;
194}
195#endif
196
197static void FAST_FUNC header_verbose_list_ar(const file_header_t *file_header)
198{
199 char mode[12];
200 char *mtime;
201
202 bb_mode_string(mode, file_header->mode);
203 mtime = ctime(&file_header->mtime);
204 mtime[16] = ' ';
205 memmove(&mtime[17], &mtime[20], 4);
206 mtime[21] = '\0';
207 printf("%s %u/%u%7"OFF_FMT"u %s %s\n", &mode[1],
208 (int)file_header->uid, (int)file_header->gid,
209 file_header->size,
210 &mtime[4], file_header->name
211 );
212}
213
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225
226
227int ar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
228int ar_main(int argc UNUSED_PARAM, char **argv)
229{
230 archive_handle_t *archive_handle;
231 unsigned opt, t;
232 enum {
233 OPT_VERBOSE = (1 << 0),
234 OPT_PRESERVE_DATE = (1 << 1),
235
236
237 OPT_CREATE = (1 << 2),
238 CMD_PRINT = (1 << 3),
239 FIRST_CMD = CMD_PRINT,
240 CMD_LIST = (1 << 4),
241 CMD_EXTRACT = (1 << 5),
242 CMD_INSERT = ((1 << 6) * ENABLE_FEATURE_AR_CREATE),
243 };
244
245 archive_handle = init_handle();
246
247
248 if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0')
249 argv[1] = xasprintf("-%s", argv[1]);
250 opt = getopt32(argv, "^"
251 "voc""ptx"IF_FEATURE_AR_CREATE("r")
252 "\0"
253
254
255 "-1:p:t:x"IF_FEATURE_AR_CREATE(":r")
256 );
257 argv += optind;
258
259 t = opt / FIRST_CMD;
260 if (t & (t-1))
261 bb_show_usage();
262
263 if (opt & CMD_PRINT) {
264 archive_handle->action_data = data_extract_to_stdout;
265 }
266 if (opt & CMD_LIST) {
267 archive_handle->action_header = header_list;
268 }
269 if (opt & CMD_EXTRACT) {
270 archive_handle->action_data = data_extract_all;
271 }
272 if (opt & OPT_PRESERVE_DATE) {
273 archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
274 }
275 if (opt & OPT_VERBOSE) {
276 archive_handle->action_header = header_verbose_list_ar;
277 }
278#if ENABLE_FEATURE_AR_CREATE
279 archive_handle->ar__name = *argv;
280#endif
281 archive_handle->src_fd = xopen(*argv++,
282 (opt & CMD_INSERT)
283 ? O_RDWR | O_CREAT
284 : O_RDONLY
285 );
286
287 if (*argv)
288 archive_handle->filter = filter_accept_list;
289 while (*argv) {
290 llist_add_to_end(&archive_handle->accept, *argv++);
291 }
292
293#if ENABLE_FEATURE_AR_CREATE
294 if (opt & CMD_INSERT)
295 return write_ar_archive(archive_handle);
296#endif
297
298 unpack_ar_archive(archive_handle);
299
300 return EXIT_SUCCESS;
301}
302