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add7091b | 1 | /* Part of CPP library. (include file handling) |
5e7b4e25 JL |
2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, |
3 | 1999, 2000 Free Software Foundation, Inc. | |
add7091b ZW |
4 | Written by Per Bothner, 1994. |
5 | Based on CCCP program by Paul Rubin, June 1986 | |
6 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
7 | Split out of cpplib.c, Zack Weinberg, Oct 1998 | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
e38992e8 | 21 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
add7091b ZW |
22 | |
23 | #include "config.h" | |
24 | #include "system.h" | |
add7091b | 25 | #include "cpplib.h" |
88ae23e7 | 26 | #include "cpphash.h" |
c1212d2f | 27 | #include "intl.h" |
168d3732 | 28 | #include "mkdeps.h" |
c31a6508 | 29 | #include "splay-tree.h" |
add7091b | 30 | |
f8f769ea ZW |
31 | #ifdef HAVE_MMAP_FILE |
32 | # include <sys/mman.h> | |
33 | # ifndef MMAP_THRESHOLD | |
34 | # define MMAP_THRESHOLD 3 /* Minimum page count to mmap the file. */ | |
35 | # endif | |
36 | ||
37 | #else /* No MMAP_FILE */ | |
38 | # undef MMAP_THRESHOLD | |
39 | # define MMAP_THRESHOLD 0 | |
40 | #endif | |
41 | ||
d7a2e0f7 ZW |
42 | #ifndef O_BINARY |
43 | # define O_BINARY 0 | |
44 | #endif | |
45 | ||
a73ac7a5 | 46 | static struct file_name_map *read_name_map |
38b24ee2 ZW |
47 | PARAMS ((cpp_reader *, const char *)); |
48 | static char *read_filename_string PARAMS ((int, FILE *)); | |
49 | static char *remap_filename PARAMS ((cpp_reader *, char *, | |
50 | struct file_name_list *)); | |
a73ac7a5 | 51 | static struct file_name_list *actual_directory |
38b24ee2 | 52 | PARAMS ((cpp_reader *, const char *)); |
c31a6508 ZW |
53 | static struct include_file *find_include_file |
54 | PARAMS ((cpp_reader *, const char *, | |
55 | struct file_name_list *)); | |
56 | static struct include_file *open_include_file | |
57 | PARAMS ((cpp_reader *, const char *)); | |
58 | static int read_include_file PARAMS ((cpp_reader *, struct include_file *)); | |
f8f769ea ZW |
59 | static ssize_t read_with_read PARAMS ((cpp_buffer *, int, ssize_t)); |
60 | static ssize_t read_file PARAMS ((cpp_buffer *, int, ssize_t)); | |
2c826217 | 61 | |
c31a6508 | 62 | static void destroy_include_file_node PARAMS ((splay_tree_value)); |
d4506961 | 63 | static int close_cached_fd PARAMS ((splay_tree_node, void *)); |
c31a6508 | 64 | |
0b3d776a | 65 | #if 0 |
f84c2018 | 66 | static void hack_vms_include_specification PARAMS ((char *)); |
0b3d776a | 67 | #endif |
add7091b | 68 | |
bb52fa7f ZW |
69 | #ifndef INCLUDE_LEN_FUDGE |
70 | #define INCLUDE_LEN_FUDGE 0 | |
71 | #endif | |
72 | ||
c31a6508 ZW |
73 | /* We use a splay tree to store information about all the include |
74 | files seen in this compilation. The key of each tree node is the | |
75 | physical path to the file. The value is 0 if the file does not | |
76 | exist, or a struct include_file pointer. */ | |
add7091b | 77 | |
c31a6508 ZW |
78 | static void |
79 | destroy_include_file_node (v) | |
80 | splay_tree_value v; | |
d35364d1 | 81 | { |
c31a6508 ZW |
82 | struct include_file *f = (struct include_file *)v; |
83 | if (f) | |
84 | { | |
85 | if (f->fd != -1) | |
86 | close (f->fd); | |
87 | free (f); | |
88 | } | |
d35364d1 | 89 | } |
add7091b | 90 | |
d4506961 ZW |
91 | static int |
92 | close_cached_fd (n, dummy) | |
93 | splay_tree_node n; | |
94 | void *dummy ATTRIBUTE_UNUSED; | |
95 | { | |
96 | struct include_file *f = (struct include_file *)n->value; | |
97 | if (f && f->fd != -1) | |
98 | { | |
99 | close (f->fd); | |
100 | f->fd = -1; | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
d35364d1 | 105 | void |
c31a6508 | 106 | _cpp_init_include_table (pfile) |
d35364d1 ZW |
107 | cpp_reader *pfile; |
108 | { | |
109 | pfile->all_include_files | |
c31a6508 ZW |
110 | = splay_tree_new ((splay_tree_compare_fn) strcmp, |
111 | (splay_tree_delete_key_fn) free, | |
112 | destroy_include_file_node); | |
0b3d776a | 113 | } |
add7091b | 114 | |
c31a6508 ZW |
115 | /* Given a filename, look it up and possibly open it. If the file |
116 | does not exist, return NULL. If the file does exist but doesn't | |
117 | need to be reread, return an include_file entry with fd == -1. | |
118 | If it needs to be (re)read, return an include_file entry with | |
119 | fd a file descriptor open on the file. */ | |
add7091b | 120 | |
c31a6508 ZW |
121 | static struct include_file * |
122 | open_include_file (pfile, filename) | |
123 | cpp_reader *pfile; | |
124 | const char *filename; | |
125 | { | |
126 | splay_tree_node nd; | |
127 | struct include_file *file = 0; | |
128 | int fd; | |
add7091b | 129 | |
c31a6508 ZW |
130 | nd = splay_tree_lookup (pfile->all_include_files, |
131 | (splay_tree_key) filename); | |
add7091b | 132 | |
c31a6508 ZW |
133 | if (nd) |
134 | { | |
135 | if (nd->value == 0) | |
136 | return 0; | |
add7091b | 137 | |
c31a6508 | 138 | file = (struct include_file *)nd->value; |
0b3d776a | 139 | |
c31a6508 ZW |
140 | if (DO_NOT_REREAD (file)) |
141 | { | |
142 | if (file->fd != -1) | |
143 | { | |
144 | close (file->fd); | |
145 | file->fd = -1; | |
146 | } | |
147 | return file; | |
148 | } | |
add7091b | 149 | |
c31a6508 ZW |
150 | /* File descriptors are cached for files that might be reread. */ |
151 | if (file->fd != -1) | |
152 | { | |
153 | lseek (file->fd, 0, SEEK_SET); | |
154 | return file; | |
155 | } | |
156 | } | |
add7091b | 157 | |
c31a6508 ZW |
158 | /* We used to open files in nonblocking mode, but that caused more |
159 | problems than it solved. Do take care not to acquire a | |
160 | controlling terminal by mistake (this can't happen on sane | |
161 | systems, but paranoia is a virtue). | |
add7091b | 162 | |
c31a6508 ZW |
163 | Use the three-argument form of open even though we aren't |
164 | specifying O_CREAT, to defend against broken system headers. | |
add7091b | 165 | |
c31a6508 ZW |
166 | O_BINARY tells some runtime libraries (notably DJGPP) not to do |
167 | newline translation; we can handle DOS line breaks just fine | |
168 | ourselves. | |
b0699dad | 169 | |
c31a6508 | 170 | Special case: the empty string is translated to stdin. */ |
d4506961 ZW |
171 | retry: |
172 | ||
c31a6508 ZW |
173 | if (filename[0] == '\0') |
174 | fd = 0; | |
f2d5f0cc | 175 | else |
c31a6508 ZW |
176 | fd = open (filename, O_RDONLY|O_NOCTTY|O_BINARY, 0666); |
177 | ||
178 | if (fd == -1) | |
f2d5f0cc | 179 | { |
c31a6508 ZW |
180 | #ifdef EACCES |
181 | if (errno == EACCES) | |
f2d5f0cc | 182 | { |
041c3194 | 183 | cpp_error (pfile, "included file \"%s\" exists but is not readable", |
c31a6508 | 184 | filename); |
f2d5f0cc | 185 | } |
c31a6508 | 186 | #endif |
d4506961 ZW |
187 | if (0 |
188 | #ifdef EMFILE | |
189 | || errno == EMFILE | |
190 | #endif | |
191 | #ifdef ENFILE | |
192 | || errno == ENFILE | |
193 | #endif | |
194 | ) | |
195 | { | |
196 | /* Too many files open. Close all cached file descriptors and | |
197 | try again. */ | |
198 | splay_tree_foreach (pfile->all_include_files, close_cached_fd, 0); | |
199 | goto retry; | |
200 | } | |
201 | ||
c31a6508 ZW |
202 | /* Nonexistent or inaccessible file. Create a negative node for it. */ |
203 | if (nd) | |
f2d5f0cc | 204 | { |
c31a6508 ZW |
205 | cpp_ice (pfile, |
206 | "node for '%s' exists, open failed, error '%s', value %lx\n", | |
207 | filename, strerror (errno), nd->value); | |
208 | destroy_include_file_node (nd->value); | |
f2d5f0cc | 209 | } |
c31a6508 ZW |
210 | splay_tree_insert (pfile->all_include_files, |
211 | (splay_tree_key) xstrdup (filename), 0); | |
212 | return 0; | |
f2d5f0cc | 213 | } |
d7a2e0f7 | 214 | |
c31a6508 ZW |
215 | /* If we haven't seen this file before, create a positive node for it. */ |
216 | if (!nd) | |
217 | { | |
218 | file = xnew (struct include_file); | |
219 | file->cmacro = 0; | |
d4506961 | 220 | file->include_count = 0; |
c31a6508 ZW |
221 | file->sysp = 0; |
222 | file->foundhere = 0; | |
223 | file->name = xstrdup (filename); | |
224 | splay_tree_insert (pfile->all_include_files, | |
225 | (splay_tree_key) file->name, | |
226 | (splay_tree_value) file); | |
227 | } | |
e576beb0 | 228 | |
c31a6508 | 229 | file->fd = fd; |
f3f751ad | 230 | file->date = (time_t) -1; |
c31a6508 | 231 | return file; |
e576beb0 ZW |
232 | } |
233 | ||
c31a6508 ZW |
234 | /* Return 1 if the file named by FNAME has been included before in |
235 | any context, 0 otherwise. */ | |
236 | int | |
237 | cpp_included (pfile, fname) | |
add7091b | 238 | cpp_reader *pfile; |
bcc5cac9 | 239 | const char *fname; |
add7091b | 240 | { |
d35364d1 | 241 | struct file_name_list *path; |
0b3d776a | 242 | char *name; |
c31a6508 | 243 | splay_tree_node nd; |
0b3d776a | 244 | |
c31a6508 | 245 | if (fname[0] == '/') |
0b3d776a | 246 | { |
c31a6508 ZW |
247 | /* Just look it up. */ |
248 | nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) fname); | |
249 | return (nd && nd->value); | |
0b3d776a | 250 | } |
c31a6508 ZW |
251 | |
252 | /* Search directory path for the file. */ | |
253 | name = (char *) alloca (strlen (fname) + pfile->max_include_len | |
254 | + 2 + INCLUDE_LEN_FUDGE); | |
255 | for (path = CPP_OPTION (pfile, quote_include); path; path = path->next) | |
0b3d776a | 256 | { |
c31a6508 ZW |
257 | memcpy (name, path->name, path->nlen); |
258 | name[path->nlen] = '/'; | |
259 | strcpy (&name[path->nlen+1], fname); | |
260 | _cpp_simplify_pathname (name); | |
261 | if (CPP_OPTION (pfile, remap)) | |
262 | name = remap_filename (pfile, name, path); | |
263 | ||
264 | nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name); | |
265 | if (nd && nd->value) | |
266 | return 1; | |
0b3d776a | 267 | } |
c31a6508 | 268 | return 0; |
add7091b ZW |
269 | } |
270 | ||
c31a6508 ZW |
271 | /* Search for include file FNAME in the include chain starting at |
272 | SEARCH_START. Return 0 if there is no such file (or it's un-openable), | |
273 | otherwise an include_file structure, possibly with a file descriptor | |
274 | open on the file. */ | |
275 | ||
276 | static struct include_file * | |
277 | find_include_file (pfile, fname, search_start) | |
f2d5f0cc ZW |
278 | cpp_reader *pfile; |
279 | const char *fname; | |
c31a6508 | 280 | struct file_name_list *search_start; |
f2d5f0cc | 281 | { |
c31a6508 ZW |
282 | struct file_name_list *path; |
283 | char *name; | |
284 | struct include_file *file; | |
add7091b | 285 | |
c31a6508 ZW |
286 | if (fname[0] == '/') |
287 | return open_include_file (pfile, fname); | |
288 | ||
289 | /* Search directory path for the file. */ | |
290 | name = (char *) alloca (strlen (fname) + pfile->max_include_len | |
291 | + 2 + INCLUDE_LEN_FUDGE); | |
292 | for (path = search_start; path; path = path->next) | |
add7091b | 293 | { |
c31a6508 ZW |
294 | memcpy (name, path->name, path->nlen); |
295 | name[path->nlen] = '/'; | |
296 | strcpy (&name[path->nlen+1], fname); | |
297 | _cpp_simplify_pathname (name); | |
298 | if (CPP_OPTION (pfile, remap)) | |
299 | name = remap_filename (pfile, name, path); | |
300 | ||
301 | file = open_include_file (pfile, name); | |
302 | if (file) | |
add7091b | 303 | { |
c31a6508 ZW |
304 | file->sysp = path->sysp; |
305 | file->foundhere = path; | |
306 | return file; | |
add7091b ZW |
307 | } |
308 | } | |
c31a6508 | 309 | return 0; |
add7091b ZW |
310 | } |
311 | ||
c31a6508 ZW |
312 | /* #line uses this to save artificial file names. We have to try |
313 | opening the file because an all_include_files entry is always | |
314 | either + or -, there's no 'I don't know' value. */ | |
315 | const char * | |
316 | _cpp_fake_include (pfile, fname) | |
add7091b | 317 | cpp_reader *pfile; |
c31a6508 | 318 | const char *fname; |
add7091b | 319 | { |
c31a6508 ZW |
320 | splay_tree_node nd; |
321 | struct include_file *file; | |
add7091b | 322 | char *name; |
add7091b | 323 | |
c31a6508 ZW |
324 | file = find_include_file (pfile, fname, CPP_OPTION (pfile, quote_include)); |
325 | if (file) | |
326 | return file->name; | |
add7091b | 327 | |
c31a6508 ZW |
328 | name = xstrdup (fname); |
329 | _cpp_simplify_pathname (name); | |
add7091b | 330 | |
c31a6508 ZW |
331 | /* We cannot just blindly insert a node, because there's still the |
332 | chance that the node already exists but isn't on the search path. */ | |
333 | nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name); | |
334 | if (nd) | |
add7091b | 335 | { |
c31a6508 ZW |
336 | free (name); |
337 | return (const char *) nd->key; | |
add7091b | 338 | } |
0b3d776a | 339 | |
c31a6508 ZW |
340 | splay_tree_insert (pfile->all_include_files, (splay_tree_key) name, 0); |
341 | return (const char *)name; | |
add7091b ZW |
342 | } |
343 | ||
e605b040 ZW |
344 | /* Not everyone who wants to set system-header-ness on a buffer can |
345 | see the details of struct include_file. This is an exported interface | |
346 | because fix-header needs it. */ | |
347 | void | |
348 | cpp_make_system_header (pfile, pbuf, flag) | |
349 | cpp_reader *pfile; | |
350 | cpp_buffer *pbuf; | |
351 | int flag; | |
352 | { | |
353 | if (flag < 0 || flag > 2) | |
354 | cpp_ice (pfile, "cpp_make_system_header: bad flag %d\n", flag); | |
355 | else if (!pbuf->inc) | |
356 | cpp_ice (pfile, "cpp_make_system_header called on non-file buffer"); | |
357 | else | |
358 | pbuf->inc->sysp = flag; | |
359 | } | |
360 | ||
c31a6508 | 361 | #define PRINT_THIS_DEP(p, b) (CPP_PRINT_DEPS(p) > (b||p->system_include_depth)) |
168d3732 | 362 | void |
041c3194 | 363 | _cpp_execute_include (pfile, f, len, no_reinclude, search_start, angle_brackets) |
168d3732 | 364 | cpp_reader *pfile; |
041c3194 | 365 | const U_CHAR *f; |
168d3732 ZW |
366 | unsigned int len; |
367 | int no_reinclude; | |
368 | struct file_name_list *search_start; | |
041c3194 | 369 | int angle_brackets; |
168d3732 | 370 | { |
c31a6508 | 371 | struct include_file *inc; |
041c3194 | 372 | char *fname; |
168d3732 ZW |
373 | |
374 | if (!search_start) | |
375 | { | |
376 | if (angle_brackets) | |
ae79697b ZW |
377 | search_start = CPP_OPTION (pfile, bracket_include); |
378 | else if (CPP_OPTION (pfile, ignore_srcdir)) | |
379 | search_start = CPP_OPTION (pfile, quote_include); | |
168d3732 ZW |
380 | else |
381 | search_start = CPP_BUFFER (pfile)->actual_dir; | |
382 | } | |
383 | ||
384 | if (!search_start) | |
385 | { | |
386 | cpp_error (pfile, "No include path in which to find %s", fname); | |
387 | return; | |
388 | } | |
389 | ||
041c3194 ZW |
390 | fname = alloca (len + 1); |
391 | memcpy (fname, f, len); | |
168d3732 ZW |
392 | fname[len] = '\0'; |
393 | ||
c31a6508 | 394 | inc = find_include_file (pfile, fname, search_start); |
168d3732 | 395 | |
c31a6508 | 396 | if (inc) |
168d3732 | 397 | { |
c31a6508 ZW |
398 | if (inc->fd == -1) |
399 | return; | |
400 | ||
401 | /* For -M, add the file to the dependencies on its first inclusion. */ | |
d4506961 | 402 | if (!inc->include_count && PRINT_THIS_DEP (pfile, angle_brackets)) |
c31a6508 | 403 | deps_add_dep (pfile->deps, inc->name); |
d4506961 | 404 | inc->include_count++; |
c31a6508 ZW |
405 | |
406 | /* Handle -H option. */ | |
407 | if (CPP_OPTION (pfile, print_include_names)) | |
408 | { | |
409 | cpp_buffer *fp = CPP_BUFFER (pfile); | |
410 | while ((fp = CPP_PREV_BUFFER (fp)) != NULL) | |
411 | putc ('.', stderr); | |
412 | fprintf (stderr, " %s\n", inc->name); | |
168d3732 | 413 | } |
168d3732 | 414 | |
c31a6508 ZW |
415 | /* Actually process the file. */ |
416 | if (no_reinclude) | |
417 | inc->cmacro = NEVER_REREAD; | |
418 | ||
419 | if (read_include_file (pfile, inc)) | |
420 | { | |
421 | if (angle_brackets) | |
422 | pfile->system_include_depth++; | |
423 | } | |
168d3732 ZW |
424 | return; |
425 | } | |
c31a6508 ZW |
426 | |
427 | if (CPP_OPTION (pfile, print_deps_missing_files) | |
428 | && PRINT_THIS_DEP (pfile, angle_brackets)) | |
168d3732 | 429 | { |
c31a6508 ZW |
430 | if (!angle_brackets) |
431 | deps_add_dep (pfile->deps, fname); | |
432 | else | |
433 | { | |
434 | char *p; | |
435 | struct file_name_list *ptr; | |
436 | /* If requested as a system header, assume it belongs in | |
437 | the first system header directory. */ | |
438 | if (CPP_OPTION (pfile, bracket_include)) | |
439 | ptr = CPP_OPTION (pfile, bracket_include); | |
440 | else | |
441 | ptr = CPP_OPTION (pfile, quote_include); | |
168d3732 | 442 | |
c31a6508 ZW |
443 | p = (char *) alloca (strlen (ptr->name) |
444 | + strlen (fname) + 2); | |
445 | if (*ptr->name != '\0') | |
446 | { | |
447 | strcpy (p, ptr->name); | |
448 | strcat (p, "/"); | |
449 | } | |
450 | strcat (p, fname); | |
451 | _cpp_simplify_pathname (p); | |
452 | deps_add_dep (pfile->deps, p); | |
453 | } | |
168d3732 | 454 | } |
c31a6508 ZW |
455 | /* If -M was specified, and this header file won't be added to |
456 | the dependency list, then don't count this as an error, | |
457 | because we can still produce correct output. Otherwise, we | |
458 | can't produce correct output, because there may be | |
459 | dependencies we need inside the missing file, and we don't | |
460 | know what directory this missing file exists in. */ | |
461 | else if (CPP_PRINT_DEPS (pfile) | |
462 | && ! PRINT_THIS_DEP (pfile, angle_brackets)) | |
463 | cpp_warning (pfile, "No include path in which to find %s", fname); | |
464 | else | |
465 | cpp_error_from_errno (pfile, fname); | |
168d3732 ZW |
466 | } |
467 | ||
f3f751ad NS |
468 | /* Locate file F, and determine whether it is newer than PFILE. Return -1, |
469 | if F cannot be located or dated, 1, if it is newer and 0 if older. */ | |
470 | ||
471 | int | |
041c3194 | 472 | _cpp_compare_file_date (pfile, f, len, angle_brackets) |
f3f751ad | 473 | cpp_reader *pfile; |
041c3194 | 474 | const U_CHAR *f; |
f3f751ad | 475 | unsigned int len; |
041c3194 | 476 | int angle_brackets; |
f3f751ad | 477 | { |
041c3194 ZW |
478 | char *fname; |
479 | struct file_name_list *search_start; | |
f3f751ad | 480 | struct include_file *inc; |
041c3194 | 481 | struct include_file *current_include = CPP_BUFFER (pfile)->inc; |
f3f751ad | 482 | |
041c3194 ZW |
483 | if (angle_brackets) |
484 | search_start = CPP_OPTION (pfile, bracket_include); | |
485 | else if (CPP_OPTION (pfile, ignore_srcdir)) | |
486 | search_start = CPP_OPTION (pfile, quote_include); | |
487 | else | |
488 | search_start = CPP_BUFFER (pfile)->actual_dir; | |
f3f751ad | 489 | |
041c3194 ZW |
490 | fname = alloca (len + 1); |
491 | memcpy (fname, f, len); | |
f3f751ad | 492 | fname[len] = '\0'; |
f3f751ad NS |
493 | inc = find_include_file (pfile, fname, search_start); |
494 | ||
495 | if (!inc) | |
496 | return -1; | |
497 | if (inc->fd >= 0) | |
498 | { | |
499 | struct stat source; | |
500 | ||
501 | if (fstat (inc->fd, &source) < 0) | |
502 | { | |
503 | close (inc->fd); | |
504 | inc->fd = -1; | |
505 | return -1; | |
506 | } | |
507 | inc->date = source.st_mtime; | |
508 | close (inc->fd); | |
509 | inc->fd = -1; | |
510 | } | |
511 | if (inc->date == (time_t)-1 || current_include->date == (time_t)-1) | |
512 | return -1; | |
513 | return inc->date > current_include->date; | |
514 | } | |
515 | ||
516 | ||
c45da1ca ZW |
517 | /* Push an input buffer and load it up with the contents of FNAME. |
518 | If FNAME is "" or NULL, read standard input. */ | |
519 | int | |
520 | cpp_read_file (pfile, fname) | |
521 | cpp_reader *pfile; | |
522 | const char *fname; | |
523 | { | |
c31a6508 | 524 | struct include_file *f; |
c45da1ca | 525 | |
d35364d1 ZW |
526 | if (fname == NULL) |
527 | fname = ""; | |
528 | ||
c31a6508 | 529 | f = open_include_file (pfile, fname); |
c45da1ca | 530 | |
041c3194 ZW |
531 | if (f == NULL) |
532 | { | |
533 | cpp_error_from_errno (pfile, fname); | |
534 | return 0; | |
535 | } | |
536 | ||
c31a6508 | 537 | return read_include_file (pfile, f); |
c45da1ca ZW |
538 | } |
539 | ||
c31a6508 ZW |
540 | /* Read the file referenced by INC into a new buffer on PFILE's stack. |
541 | Return 1 if successful, 0 if not. */ | |
add7091b | 542 | |
168d3732 | 543 | static int |
c31a6508 | 544 | read_include_file (pfile, inc) |
add7091b | 545 | cpp_reader *pfile; |
c31a6508 | 546 | struct include_file *inc; |
add7091b ZW |
547 | { |
548 | struct stat st; | |
f8f769ea | 549 | ssize_t length; |
0b3d776a | 550 | cpp_buffer *fp; |
c31a6508 | 551 | int fd = inc->fd; |
add7091b | 552 | |
041c3194 ZW |
553 | /* Ensures we dump our current line before entering an include file. */ |
554 | if (CPP_BUFFER (pfile) && pfile->printer) | |
555 | cpp_output_tokens (pfile, pfile->printer, | |
556 | CPP_BUF_LINE (CPP_BUFFER (pfile))); | |
557 | ||
d35364d1 ZW |
558 | fp = cpp_push_buffer (pfile, NULL, 0); |
559 | ||
560 | if (fp == 0) | |
561 | goto push_fail; | |
562 | ||
041c3194 | 563 | if (fd < 0 || fstat (fd, &st) < 0) |
0b3d776a | 564 | goto perror_fail; |
f3f751ad NS |
565 | |
566 | inc->date = st.st_mtime; | |
554fbeef | 567 | |
f8f769ea ZW |
568 | /* If fd points to a plain file, we might be able to mmap it; we can |
569 | definitely allocate the buffer all at once. If fd is a pipe or | |
570 | terminal, we can't do either. If fd is something weird, like a | |
571 | block device or a directory, we don't want to read it at all. | |
6458033d ZW |
572 | |
573 | Unfortunately, different systems use different st.st_mode values | |
574 | for pipes: some have S_ISFIFO, some S_ISSOCK, some are buggy and | |
10e56506 ZW |
575 | zero the entire struct stat except a couple fields. Hence we don't |
576 | even try to figure out what something is, except for plain files, | |
f8f769ea | 577 | directories, and block devices. */ |
6458033d | 578 | |
0b3d776a ZW |
579 | if (S_ISREG (st.st_mode)) |
580 | { | |
f8f769ea ZW |
581 | ssize_t st_size; |
582 | ||
583 | /* off_t might have a wider range than ssize_t - in other words, | |
554fbeef | 584 | the max size of a file might be bigger than the address |
6458033d | 585 | space. We can't handle a file that large. (Anyone with |
f8f769ea | 586 | a single source file bigger than 2GB needs to rethink |
e0fcc0e1 KG |
587 | their coding style.) Some systems (e.g. AIX 4.1) define |
588 | SSIZE_MAX to be much smaller than the actual range of the | |
589 | type. Use INTTYPE_MAXIMUM unconditionally to ensure this | |
590 | does not bite us. */ | |
591 | if (st.st_size > INTTYPE_MAXIMUM (ssize_t)) | |
554fbeef | 592 | { |
c31a6508 | 593 | cpp_error (pfile, "%s is too large", inc->name); |
554fbeef ZW |
594 | goto fail; |
595 | } | |
f8f769ea ZW |
596 | st_size = st.st_size; |
597 | length = read_file (fp, fd, st_size); | |
598 | if (length == -1) | |
599 | goto perror_fail; | |
600 | if (length < st_size) | |
c31a6508 | 601 | cpp_warning (pfile, "%s is shorter than expected\n", inc->name); |
add7091b | 602 | } |
10e56506 | 603 | else if (S_ISBLK (st.st_mode)) |
0b3d776a | 604 | { |
c31a6508 | 605 | cpp_error (pfile, "%s is a block device", inc->name); |
10e56506 | 606 | goto fail; |
0b3d776a | 607 | } |
10e56506 | 608 | else if (S_ISDIR (st.st_mode)) |
0b3d776a | 609 | { |
c31a6508 | 610 | cpp_error (pfile, "%s is a directory", inc->name); |
554fbeef | 611 | goto fail; |
add7091b | 612 | } |
10e56506 ZW |
613 | else |
614 | { | |
f8f769ea ZW |
615 | /* 8 kilobytes is a sensible starting size. It ought to be |
616 | bigger than the kernel pipe buffer, and it's definitely | |
617 | bigger than the majority of C source files. */ | |
618 | length = read_with_read (fp, fd, 8 * 1024); | |
619 | if (length == -1) | |
620 | goto perror_fail; | |
10e56506 | 621 | } |
add7091b | 622 | |
f8f769ea | 623 | /* These must be set before prescan. */ |
c31a6508 ZW |
624 | fp->inc = inc; |
625 | fp->nominal_fname = inc->name; | |
fb753f88 | 626 | pfile->include_depth++; |
f8f769ea | 627 | |
554fbeef | 628 | if (length == 0) |
c31a6508 | 629 | inc->cmacro = NEVER_REREAD; |
add7091b | 630 | |
ff2b53ef | 631 | fp->rlimit = fp->buf + length; |
554fbeef | 632 | fp->cur = fp->buf; |
554fbeef | 633 | fp->lineno = 1; |
099a9dd0 | 634 | fp->line_base = fp->buf; |
554fbeef ZW |
635 | |
636 | /* The ->actual_dir field is only used when ignore_srcdir is not in effect; | |
637 | see do_include */ | |
ae79697b | 638 | if (!CPP_OPTION (pfile, ignore_srcdir)) |
c31a6508 | 639 | fp->actual_dir = actual_directory (pfile, inc->name); |
554fbeef | 640 | |
add7091b | 641 | pfile->input_stack_listing_current = 0; |
add7091b ZW |
642 | return 1; |
643 | ||
0b3d776a | 644 | perror_fail: |
c31a6508 ZW |
645 | cpp_error_from_errno (pfile, inc->name); |
646 | /* Do not try to read this file again. */ | |
041c3194 ZW |
647 | if (fd != -1) |
648 | close (fd); | |
c31a6508 ZW |
649 | inc->fd = -1; |
650 | inc->cmacro = NEVER_REREAD; | |
0b3d776a | 651 | fail: |
554fbeef | 652 | cpp_pop_buffer (pfile); |
d35364d1 | 653 | push_fail: |
0b3d776a | 654 | return 0; |
add7091b ZW |
655 | } |
656 | ||
f8f769ea ZW |
657 | static ssize_t |
658 | read_file (fp, fd, size) | |
659 | cpp_buffer *fp; | |
660 | int fd; | |
661 | ssize_t size; | |
662 | { | |
663 | static int pagesize = -1; | |
664 | ||
665 | if (size == 0) | |
666 | return 0; | |
667 | ||
668 | if (pagesize == -1) | |
669 | pagesize = getpagesize (); | |
670 | ||
671 | #if MMAP_THRESHOLD | |
672 | if (size / pagesize >= MMAP_THRESHOLD) | |
673 | { | |
674 | const U_CHAR *result | |
675 | = (const U_CHAR *) mmap (0, size, PROT_READ, MAP_PRIVATE, fd, 0); | |
676 | if (result != (const U_CHAR *)-1) | |
677 | { | |
678 | fp->buf = result; | |
679 | fp->mapped = 1; | |
680 | return size; | |
681 | } | |
682 | } | |
683 | /* If mmap fails, try read. If there's really a problem, read will | |
684 | fail too. */ | |
685 | #endif | |
686 | ||
687 | return read_with_read (fp, fd, size); | |
688 | } | |
689 | ||
690 | static ssize_t | |
691 | read_with_read (fp, fd, size) | |
692 | cpp_buffer *fp; | |
693 | int fd; | |
694 | ssize_t size; | |
695 | { | |
696 | ssize_t offset, count; | |
697 | U_CHAR *buf; | |
698 | ||
699 | buf = (U_CHAR *) xmalloc (size); | |
700 | offset = 0; | |
701 | while ((count = read (fd, buf + offset, size - offset)) > 0) | |
702 | { | |
703 | offset += count; | |
704 | if (offset == size) | |
705 | buf = xrealloc (buf, (size *= 2)); | |
706 | } | |
707 | if (count < 0) | |
708 | { | |
709 | free (buf); | |
710 | return -1; | |
711 | } | |
712 | if (offset == 0) | |
713 | { | |
714 | free (buf); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | if (offset < size) | |
719 | buf = xrealloc (buf, offset); | |
720 | fp->buf = buf; | |
721 | fp->mapped = 0; | |
722 | return offset; | |
723 | } | |
724 | ||
c31a6508 ZW |
725 | /* The file_name_map structure holds a mapping of file names for a |
726 | particular directory. This mapping is read from the file named | |
727 | FILE_NAME_MAP_FILE in that directory. Such a file can be used to | |
728 | map filenames on a file system with severe filename restrictions, | |
729 | such as DOS. The format of the file name map file is just a series | |
730 | of lines with two tokens on each line. The first token is the name | |
731 | to map, and the second token is the actual name to use. */ | |
732 | ||
733 | struct file_name_map | |
734 | { | |
735 | struct file_name_map *map_next; | |
736 | char *map_from; | |
737 | char *map_to; | |
738 | }; | |
739 | ||
740 | #define FILE_NAME_MAP_FILE "header.gcc" | |
741 | ||
742 | /* Read a space delimited string of unlimited length from a stdio | |
743 | file. */ | |
744 | ||
745 | static char * | |
746 | read_filename_string (ch, f) | |
747 | int ch; | |
748 | FILE *f; | |
749 | { | |
750 | char *alloc, *set; | |
751 | int len; | |
752 | ||
753 | len = 20; | |
754 | set = alloc = xmalloc (len + 1); | |
755 | if (! is_space(ch)) | |
756 | { | |
757 | *set++ = ch; | |
758 | while ((ch = getc (f)) != EOF && ! is_space(ch)) | |
759 | { | |
760 | if (set - alloc == len) | |
761 | { | |
762 | len *= 2; | |
763 | alloc = xrealloc (alloc, len + 1); | |
764 | set = alloc + len / 2; | |
765 | } | |
766 | *set++ = ch; | |
767 | } | |
768 | } | |
769 | *set = '\0'; | |
770 | ungetc (ch, f); | |
771 | return alloc; | |
772 | } | |
773 | ||
774 | /* This structure holds a linked list of file name maps, one per directory. */ | |
775 | ||
776 | struct file_name_map_list | |
777 | { | |
778 | struct file_name_map_list *map_list_next; | |
779 | char *map_list_name; | |
780 | struct file_name_map *map_list_map; | |
781 | }; | |
782 | ||
783 | /* Read the file name map file for DIRNAME. */ | |
784 | ||
785 | static struct file_name_map * | |
786 | read_name_map (pfile, dirname) | |
787 | cpp_reader *pfile; | |
788 | const char *dirname; | |
789 | { | |
790 | register struct file_name_map_list *map_list_ptr; | |
791 | char *name; | |
792 | FILE *f; | |
793 | ||
794 | for (map_list_ptr = CPP_OPTION (pfile, map_list); map_list_ptr; | |
795 | map_list_ptr = map_list_ptr->map_list_next) | |
796 | if (! strcmp (map_list_ptr->map_list_name, dirname)) | |
797 | return map_list_ptr->map_list_map; | |
798 | ||
799 | map_list_ptr = ((struct file_name_map_list *) | |
800 | xmalloc (sizeof (struct file_name_map_list))); | |
801 | map_list_ptr->map_list_name = xstrdup (dirname); | |
802 | ||
803 | name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2); | |
804 | strcpy (name, dirname); | |
805 | if (*dirname) | |
806 | strcat (name, "/"); | |
807 | strcat (name, FILE_NAME_MAP_FILE); | |
808 | f = fopen (name, "r"); | |
809 | if (!f) | |
810 | map_list_ptr->map_list_map = (struct file_name_map *)-1; | |
811 | else | |
812 | { | |
813 | int ch; | |
814 | int dirlen = strlen (dirname); | |
815 | ||
816 | while ((ch = getc (f)) != EOF) | |
817 | { | |
818 | char *from, *to; | |
819 | struct file_name_map *ptr; | |
820 | ||
821 | if (is_space(ch)) | |
822 | continue; | |
823 | from = read_filename_string (ch, f); | |
824 | while ((ch = getc (f)) != EOF && is_hspace(ch)) | |
825 | ; | |
826 | to = read_filename_string (ch, f); | |
827 | ||
828 | ptr = ((struct file_name_map *) | |
829 | xmalloc (sizeof (struct file_name_map))); | |
830 | ptr->map_from = from; | |
831 | ||
832 | /* Make the real filename absolute. */ | |
833 | if (*to == '/') | |
834 | ptr->map_to = to; | |
835 | else | |
836 | { | |
837 | ptr->map_to = xmalloc (dirlen + strlen (to) + 2); | |
838 | strcpy (ptr->map_to, dirname); | |
839 | ptr->map_to[dirlen] = '/'; | |
840 | strcpy (ptr->map_to + dirlen + 1, to); | |
841 | free (to); | |
842 | } | |
843 | ||
844 | ptr->map_next = map_list_ptr->map_list_map; | |
845 | map_list_ptr->map_list_map = ptr; | |
846 | ||
847 | while ((ch = getc (f)) != '\n') | |
848 | if (ch == EOF) | |
849 | break; | |
850 | } | |
851 | fclose (f); | |
852 | } | |
853 | ||
854 | map_list_ptr->map_list_next = CPP_OPTION (pfile, map_list); | |
855 | CPP_OPTION (pfile, map_list) = map_list_ptr; | |
856 | ||
857 | return map_list_ptr->map_list_map; | |
858 | } | |
859 | ||
860 | /* Remap NAME based on the file_name_map (if any) for LOC. */ | |
861 | ||
862 | static char * | |
863 | remap_filename (pfile, name, loc) | |
864 | cpp_reader *pfile; | |
865 | char *name; | |
866 | struct file_name_list *loc; | |
867 | { | |
868 | struct file_name_map *map; | |
869 | const char *from, *p, *dir; | |
870 | ||
871 | if (! loc->name_map) | |
872 | loc->name_map = read_name_map (pfile, | |
873 | loc->name | |
874 | ? loc->name : "."); | |
875 | ||
876 | if (loc->name_map == (struct file_name_map *)-1) | |
877 | return name; | |
878 | ||
879 | from = name + strlen (loc->name) + 1; | |
880 | ||
881 | for (map = loc->name_map; map; map = map->map_next) | |
882 | if (!strcmp (map->map_from, from)) | |
883 | return map->map_to; | |
884 | ||
885 | /* Try to find a mapping file for the particular directory we are | |
886 | looking in. Thus #include <sys/types.h> will look up sys/types.h | |
887 | in /usr/include/header.gcc and look up types.h in | |
888 | /usr/include/sys/header.gcc. */ | |
889 | p = strrchr (name, '/'); | |
890 | if (!p) | |
891 | p = name; | |
892 | if (loc && loc->name | |
893 | && strlen (loc->name) == (size_t) (p - name) | |
894 | && !strncmp (loc->name, name, p - name)) | |
895 | /* FILENAME is in SEARCHPTR, which we've already checked. */ | |
896 | return name; | |
897 | ||
898 | if (p == name) | |
899 | { | |
900 | dir = "."; | |
901 | from = name; | |
902 | } | |
903 | else | |
904 | { | |
905 | char * newdir = (char *) alloca (p - name + 1); | |
906 | memcpy (newdir, name, p - name); | |
907 | newdir[p - name] = '\0'; | |
908 | dir = newdir; | |
909 | from = p + 1; | |
910 | } | |
911 | ||
912 | for (map = read_name_map (pfile, dir); map; map = map->map_next) | |
913 | if (! strcmp (map->map_from, name)) | |
914 | return map->map_to; | |
915 | ||
916 | return name; | |
917 | } | |
918 | ||
6458033d ZW |
919 | /* Given a path FNAME, extract the directory component and place it |
920 | onto the actual_dirs list. Return a pointer to the allocated | |
921 | file_name_list structure. These structures are used to implement | |
922 | current-directory "" include searching. */ | |
923 | ||
f1a86df6 ZW |
924 | static struct file_name_list * |
925 | actual_directory (pfile, fname) | |
926 | cpp_reader *pfile; | |
bcc5cac9 | 927 | const char *fname; |
f1a86df6 ZW |
928 | { |
929 | char *last_slash, *dir; | |
930 | size_t dlen; | |
931 | struct file_name_list *x; | |
932 | ||
c49445e0 | 933 | dir = xstrdup (fname); |
7ceb3598 | 934 | last_slash = strrchr (dir, '/'); |
f1a86df6 ZW |
935 | if (last_slash) |
936 | { | |
937 | if (last_slash == dir) | |
938 | { | |
939 | dlen = 1; | |
940 | last_slash[1] = '\0'; | |
941 | } | |
942 | else | |
943 | { | |
944 | dlen = last_slash - dir; | |
945 | *last_slash = '\0'; | |
946 | } | |
947 | } | |
948 | else | |
949 | { | |
950 | dir[0] = '.'; | |
951 | dir[1] = '\0'; | |
952 | dlen = 1; | |
953 | } | |
954 | ||
955 | if (dlen > pfile->max_include_len) | |
956 | pfile->max_include_len = dlen; | |
957 | ||
958 | for (x = pfile->actual_dirs; x; x = x->alloc) | |
959 | if (!strcmp (x->name, dir)) | |
960 | { | |
961 | free (dir); | |
962 | return x; | |
963 | } | |
964 | ||
965 | /* Not found, make a new one. */ | |
966 | x = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); | |
967 | x->name = dir; | |
968 | x->nlen = dlen; | |
ae79697b | 969 | x->next = CPP_OPTION (pfile, quote_include); |
f1a86df6 | 970 | x->alloc = pfile->actual_dirs; |
c31a6508 | 971 | x->sysp = CPP_BUFFER (pfile)->inc->sysp; |
f1a86df6 ZW |
972 | x->name_map = NULL; |
973 | ||
974 | pfile->actual_dirs = x; | |
975 | return x; | |
976 | } | |
977 | ||
0b3d776a ZW |
978 | /* Simplify a path name in place, deleting redundant components. This |
979 | reduces OS overhead and guarantees that equivalent paths compare | |
980 | the same (modulo symlinks). | |
981 | ||
982 | Transforms made: | |
983 | foo/bar/../quux foo/quux | |
984 | foo/./bar foo/bar | |
985 | foo//bar foo/bar | |
986 | /../quux /quux | |
987 | //quux //quux (POSIX allows leading // as a namespace escape) | |
988 | ||
989 | Guarantees no trailing slashes. All transforms reduce the length | |
990 | of the string. | |
991 | */ | |
0b22d65c | 992 | void |
b0699dad | 993 | _cpp_simplify_pathname (path) |
21380ab0 | 994 | char *path; |
0b3d776a ZW |
995 | { |
996 | char *from, *to; | |
997 | char *base; | |
998 | int absolute = 0; | |
999 | ||
509781a4 | 1000 | #if defined (HAVE_DOS_BASED_FILE_SYSTEM) |
0b3d776a ZW |
1001 | /* Convert all backslashes to slashes. */ |
1002 | for (from = path; *from; from++) | |
1003 | if (*from == '\\') *from = '/'; | |
1004 | ||
1005 | /* Skip over leading drive letter if present. */ | |
1006 | if (ISALPHA (path[0]) && path[1] == ':') | |
1007 | from = to = &path[2]; | |
1008 | else | |
1009 | from = to = path; | |
1010 | #else | |
1011 | from = to = path; | |
1012 | #endif | |
1013 | ||
1014 | /* Remove redundant initial /s. */ | |
1015 | if (*from == '/') | |
1016 | { | |
1017 | absolute = 1; | |
1018 | to++; | |
1019 | from++; | |
1020 | if (*from == '/') | |
1021 | { | |
1022 | if (*++from == '/') | |
1023 | /* 3 or more initial /s are equivalent to 1 /. */ | |
1024 | while (*++from == '/'); | |
1025 | else | |
1026 | /* On some hosts // differs from /; Posix allows this. */ | |
1027 | to++; | |
1028 | } | |
1029 | } | |
1030 | base = to; | |
1031 | ||
1032 | for (;;) | |
1033 | { | |
1034 | while (*from == '/') | |
1035 | from++; | |
1036 | ||
1037 | if (from[0] == '.' && from[1] == '/') | |
1038 | from += 2; | |
1039 | else if (from[0] == '.' && from[1] == '\0') | |
1040 | goto done; | |
1041 | else if (from[0] == '.' && from[1] == '.' && from[2] == '/') | |
1042 | { | |
1043 | if (base == to) | |
1044 | { | |
1045 | if (absolute) | |
1046 | from += 3; | |
1047 | else | |
1048 | { | |
1049 | *to++ = *from++; | |
1050 | *to++ = *from++; | |
1051 | *to++ = *from++; | |
1052 | base = to; | |
1053 | } | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | to -= 2; | |
1058 | while (to > base && *to != '/') to--; | |
1059 | if (*to == '/') | |
1060 | to++; | |
1061 | from += 3; | |
1062 | } | |
1063 | } | |
1064 | else if (from[0] == '.' && from[1] == '.' && from[2] == '\0') | |
1065 | { | |
1066 | if (base == to) | |
1067 | { | |
1068 | if (!absolute) | |
1069 | { | |
1070 | *to++ = *from++; | |
1071 | *to++ = *from++; | |
1072 | } | |
1073 | } | |
1074 | else | |
1075 | { | |
1076 | to -= 2; | |
1077 | while (to > base && *to != '/') to--; | |
1078 | if (*to == '/') | |
1079 | to++; | |
1080 | } | |
1081 | goto done; | |
1082 | } | |
1083 | else | |
1084 | /* Copy this component and trailing /, if any. */ | |
1085 | while ((*to++ = *from++) != '/') | |
1086 | { | |
1087 | if (!to[-1]) | |
1088 | { | |
1089 | to--; | |
1090 | goto done; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | } | |
1095 | ||
1096 | done: | |
1097 | /* Trim trailing slash */ | |
1098 | if (to[0] == '/' && (!absolute || to > path+1)) | |
1099 | to--; | |
1100 | ||
1101 | /* Change the empty string to "." so that stat() on the result | |
1102 | will always work. */ | |
1103 | if (to == path) | |
1104 | *to++ = '.'; | |
1105 | ||
1106 | *to = '\0'; | |
1107 | ||
1108 | return; | |
1109 | } | |
1110 | ||
1111 | /* It is not clear when this should be used if at all, so I've | |
1112 | disabled it until someone who understands VMS can look at it. */ | |
1113 | #if 0 | |
add7091b ZW |
1114 | |
1115 | /* Under VMS we need to fix up the "include" specification filename. | |
1116 | ||
1117 | Rules for possible conversions | |
1118 | ||
1119 | fullname tried paths | |
1120 | ||
1121 | name name | |
1122 | ./dir/name [.dir]name | |
1123 | /dir/name dir:name | |
1124 | /name [000000]name, name | |
1125 | dir/name dir:[000000]name, dir:name, dir/name | |
1126 | dir1/dir2/name dir1:[dir2]name, dir1:[000000.dir2]name | |
1127 | path:/name path:[000000]name, path:name | |
1128 | path:/dir/name path:[000000.dir]name, path:[dir]name | |
1129 | path:dir/name path:[dir]name | |
1130 | [path]:[dir]name [path.dir]name | |
1131 | path/[dir]name [path.dir]name | |
1132 | ||
1133 | The path:/name input is constructed when expanding <> includes. */ | |
1134 | ||
1135 | ||
1136 | static void | |
1137 | hack_vms_include_specification (fullname) | |
1138 | char *fullname; | |
1139 | { | |
1140 | register char *basename, *unixname, *local_ptr, *first_slash; | |
1141 | int f, check_filename_before_returning, must_revert; | |
1142 | char Local[512]; | |
1143 | ||
1144 | check_filename_before_returning = 0; | |
1145 | must_revert = 0; | |
1146 | /* See if we can find a 1st slash. If not, there's no path information. */ | |
7ceb3598 | 1147 | first_slash = strchr (fullname, '/'); |
add7091b ZW |
1148 | if (first_slash == 0) |
1149 | return 0; /* Nothing to do!!! */ | |
1150 | ||
1151 | /* construct device spec if none given. */ | |
1152 | ||
7ceb3598 | 1153 | if (strchr (fullname, ':') == 0) |
add7091b ZW |
1154 | { |
1155 | ||
1156 | /* If fullname has a slash, take it as device spec. */ | |
1157 | ||
1158 | if (first_slash == fullname) | |
1159 | { | |
7ceb3598 | 1160 | first_slash = strchr (fullname + 1, '/'); /* 2nd slash ? */ |
add7091b ZW |
1161 | if (first_slash) |
1162 | *first_slash = ':'; /* make device spec */ | |
1163 | for (basename = fullname; *basename != 0; basename++) | |
1164 | *basename = *(basename+1); /* remove leading slash */ | |
1165 | } | |
1166 | else if ((first_slash[-1] != '.') /* keep ':/', './' */ | |
1167 | && (first_slash[-1] != ':') | |
1168 | && (first_slash[-1] != ']')) /* or a vms path */ | |
1169 | { | |
1170 | *first_slash = ':'; | |
1171 | } | |
1172 | else if ((first_slash[1] == '[') /* skip './' in './[dir' */ | |
1173 | && (first_slash[-1] == '.')) | |
1174 | fullname += 2; | |
1175 | } | |
1176 | ||
1177 | /* Get part after first ':' (basename[-1] == ':') | |
1178 | or last '/' (basename[-1] == '/'). */ | |
1179 | ||
1180 | basename = base_name (fullname); | |
1181 | ||
1182 | local_ptr = Local; /* initialize */ | |
1183 | ||
1184 | /* We are trying to do a number of things here. First of all, we are | |
1185 | trying to hammer the filenames into a standard format, such that later | |
1186 | processing can handle them. | |
1187 | ||
1188 | If the file name contains something like [dir.], then it recognizes this | |
1189 | as a root, and strips the ".]". Later processing will add whatever is | |
1190 | needed to get things working properly. | |
1191 | ||
1192 | If no device is specified, then the first directory name is taken to be | |
1193 | a device name (or a rooted logical). */ | |
1194 | ||
1195 | /* Point to the UNIX filename part (which needs to be fixed!) | |
1196 | but skip vms path information. | |
1197 | [basename != fullname since first_slash != 0]. */ | |
1198 | ||
1199 | if ((basename[-1] == ':') /* vms path spec. */ | |
1200 | || (basename[-1] == ']') | |
1201 | || (basename[-1] == '>')) | |
1202 | unixname = basename; | |
1203 | else | |
1204 | unixname = fullname; | |
1205 | ||
1206 | if (*unixname == '/') | |
1207 | unixname++; | |
1208 | ||
1209 | /* If the directory spec is not rooted, we can just copy | |
1210 | the UNIX filename part and we are done. */ | |
1211 | ||
1212 | if (((basename - fullname) > 1) | |
1213 | && ( (basename[-1] == ']') | |
1214 | || (basename[-1] == '>'))) | |
1215 | { | |
1216 | if (basename[-2] != '.') | |
1217 | { | |
1218 | ||
1219 | /* The VMS part ends in a `]', and the preceding character is not a `.'. | |
1220 | -> PATH]:/name (basename = '/name', unixname = 'name') | |
1221 | We strip the `]', and then splice the two parts of the name in the | |
86702e31 | 1222 | usual way. Given the default locations for include files, |
add7091b ZW |
1223 | we will only use this code if the user specifies alternate locations |
1224 | with the /include (-I) switch on the command line. */ | |
1225 | ||
1226 | basename -= 1; /* Strip "]" */ | |
1227 | unixname--; /* backspace */ | |
1228 | } | |
1229 | else | |
1230 | { | |
1231 | ||
1232 | /* The VMS part has a ".]" at the end, and this will not do. Later | |
1233 | processing will add a second directory spec, and this would be a syntax | |
1234 | error. Thus we strip the ".]", and thus merge the directory specs. | |
1235 | We also backspace unixname, so that it points to a '/'. This inhibits the | |
1236 | generation of the 000000 root directory spec (which does not belong here | |
1237 | in this case). */ | |
1238 | ||
1239 | basename -= 2; /* Strip ".]" */ | |
1240 | unixname--; /* backspace */ | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | else | |
1245 | ||
1246 | { | |
1247 | ||
1248 | /* We drop in here if there is no VMS style directory specification yet. | |
1249 | If there is no device specification either, we make the first dir a | |
1250 | device and try that. If we do not do this, then we will be essentially | |
1251 | searching the users default directory (as if they did a #include "asdf.h"). | |
1252 | ||
1253 | Then all we need to do is to push a '[' into the output string. Later | |
1254 | processing will fill this in, and close the bracket. */ | |
1255 | ||
1256 | if ((unixname != fullname) /* vms path spec found. */ | |
1257 | && (basename[-1] != ':')) | |
1258 | *local_ptr++ = ':'; /* dev not in spec. take first dir */ | |
1259 | ||
1260 | *local_ptr++ = '['; /* Open the directory specification */ | |
1261 | } | |
1262 | ||
1263 | if (unixname == fullname) /* no vms dir spec. */ | |
1264 | { | |
1265 | must_revert = 1; | |
1266 | if ((first_slash != 0) /* unix dir spec. */ | |
1267 | && (*unixname != '/') /* not beginning with '/' */ | |
1268 | && (*unixname != '.')) /* or './' or '../' */ | |
1269 | *local_ptr++ = '.'; /* dir is local ! */ | |
1270 | } | |
1271 | ||
1272 | /* at this point we assume that we have the device spec, and (at least | |
1273 | the opening "[" for a directory specification. We may have directories | |
1274 | specified already. | |
1275 | ||
1276 | If there are no other slashes then the filename will be | |
1277 | in the "root" directory. Otherwise, we need to add | |
1278 | directory specifications. */ | |
1279 | ||
7ceb3598 | 1280 | if (strchr (unixname, '/') == 0) |
add7091b ZW |
1281 | { |
1282 | /* if no directories specified yet and none are following. */ | |
1283 | if (local_ptr[-1] == '[') | |
1284 | { | |
1285 | /* Just add "000000]" as the directory string */ | |
1286 | strcpy (local_ptr, "000000]"); | |
1287 | local_ptr += strlen (local_ptr); | |
1288 | check_filename_before_returning = 1; /* we might need to fool with this later */ | |
1289 | } | |
1290 | } | |
1291 | else | |
1292 | { | |
1293 | ||
1294 | /* As long as there are still subdirectories to add, do them. */ | |
7ceb3598 | 1295 | while (strchr (unixname, '/') != 0) |
add7091b ZW |
1296 | { |
1297 | /* If this token is "." we can ignore it | |
1298 | if it's not at the beginning of a path. */ | |
1299 | if ((unixname[0] == '.') && (unixname[1] == '/')) | |
1300 | { | |
1301 | /* remove it at beginning of path. */ | |
1302 | if ( ((unixname == fullname) /* no device spec */ | |
1303 | && (fullname+2 != basename)) /* starts with ./ */ | |
1304 | /* or */ | |
1305 | || ((basename[-1] == ':') /* device spec */ | |
1306 | && (unixname-1 == basename))) /* and ./ afterwards */ | |
1307 | *local_ptr++ = '.'; /* make '[.' start of path. */ | |
1308 | unixname += 2; | |
1309 | continue; | |
1310 | } | |
1311 | ||
1312 | /* Add a subdirectory spec. Do not duplicate "." */ | |
1313 | if ( local_ptr[-1] != '.' | |
1314 | && local_ptr[-1] != '[' | |
1315 | && local_ptr[-1] != '<') | |
1316 | *local_ptr++ = '.'; | |
1317 | ||
1318 | /* If this is ".." then the spec becomes "-" */ | |
1319 | if ( (unixname[0] == '.') | |
1320 | && (unixname[1] == '.') | |
1321 | && (unixname[2] == '/')) | |
1322 | { | |
1323 | /* Add "-" and skip the ".." */ | |
1324 | if ((local_ptr[-1] == '.') | |
1325 | && (local_ptr[-2] == '[')) | |
1326 | local_ptr--; /* prevent [.- */ | |
1327 | *local_ptr++ = '-'; | |
1328 | unixname += 3; | |
1329 | continue; | |
1330 | } | |
1331 | ||
1332 | /* Copy the subdirectory */ | |
1333 | while (*unixname != '/') | |
1334 | *local_ptr++= *unixname++; | |
1335 | ||
1336 | unixname++; /* Skip the "/" */ | |
1337 | } | |
1338 | ||
1339 | /* Close the directory specification */ | |
1340 | if (local_ptr[-1] == '.') /* no trailing periods */ | |
1341 | local_ptr--; | |
1342 | ||
1343 | if (local_ptr[-1] == '[') /* no dir needed */ | |
1344 | local_ptr--; | |
1345 | else | |
1346 | *local_ptr++ = ']'; | |
1347 | } | |
1348 | ||
1349 | /* Now add the filename. */ | |
1350 | ||
1351 | while (*unixname) | |
1352 | *local_ptr++ = *unixname++; | |
1353 | *local_ptr = 0; | |
1354 | ||
1355 | /* Now append it to the original VMS spec. */ | |
1356 | ||
1357 | strcpy ((must_revert==1)?fullname:basename, Local); | |
1358 | ||
1359 | /* If we put a [000000] in the filename, try to open it first. If this fails, | |
1360 | remove the [000000], and return that name. This provides flexibility | |
1361 | to the user in that they can use both rooted and non-rooted logical names | |
1362 | to point to the location of the file. */ | |
1363 | ||
1364 | if (check_filename_before_returning) | |
1365 | { | |
e576beb0 | 1366 | f = open (fullname, O_RDONLY|O_NONBLOCK); |
add7091b ZW |
1367 | if (f >= 0) |
1368 | { | |
1369 | /* The file name is OK as it is, so return it as is. */ | |
1370 | close (f); | |
1371 | return 1; | |
1372 | } | |
1373 | ||
1374 | /* The filename did not work. Try to remove the [000000] from the name, | |
1375 | and return it. */ | |
1376 | ||
7ceb3598 NB |
1377 | basename = strchr (fullname, '['); |
1378 | local_ptr = strchr (fullname, ']') + 1; | |
add7091b ZW |
1379 | strcpy (basename, local_ptr); /* this gets rid of it */ |
1380 | ||
1381 | } | |
1382 | ||
1383 | return 1; | |
1384 | } | |
1385 | #endif /* VMS */ |