1 /* Part of CPP library. (include file handling)
2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998,
3 1999, 2000 Free Software Foundation, Inc.
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
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
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.
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
21 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include "splay-tree.h"
32 # include <sys/mman.h>
33 # ifndef MMAP_THRESHOLD
34 # define MMAP_THRESHOLD 3 /* Minimum page count to mmap the file. */
37 #else /* No MMAP_FILE */
38 # undef MMAP_THRESHOLD
39 # define MMAP_THRESHOLD 0
46 /* Suppress warning about function macros used w/o arguments in traditional
47 C. It is unlikely that glibc's strcmp macro helps this file at all. */
50 static struct file_name_map *read_name_map
51 PARAMS ((cpp_reader *, const char *));
52 static char *read_filename_string PARAMS ((int, FILE *));
53 static char *remap_filename PARAMS ((cpp_reader *, char *,
54 struct file_name_list *));
55 static struct file_name_list *actual_directory
56 PARAMS ((cpp_reader *, const char *));
57 static struct include_file *find_include_file
58 PARAMS ((cpp_reader *, const char *,
59 struct file_name_list *));
60 static struct include_file *open_include_file
61 PARAMS ((cpp_reader *, const char *));
62 static int read_include_file PARAMS ((cpp_reader *, struct include_file *));
63 static ssize_t read_with_read PARAMS ((cpp_buffer *, int, ssize_t));
64 static ssize_t read_file PARAMS ((cpp_buffer *, int, ssize_t));
66 static void destroy_include_file_node PARAMS ((splay_tree_value));
67 static int close_cached_fd PARAMS ((splay_tree_node, void *));
68 static int report_missing_guard PARAMS ((splay_tree_node, void *));
71 static void hack_vms_include_specification PARAMS ((char *));
74 #ifndef INCLUDE_LEN_FUDGE
75 #define INCLUDE_LEN_FUDGE 0
78 /* We use a splay tree to store information about all the include
79 files seen in this compilation. The key of each tree node is the
80 physical path to the file. The value is 0 if the file does not
81 exist, or a struct include_file pointer. */
84 destroy_include_file_node (v)
87 struct include_file *f = (struct include_file *)v;
97 close_cached_fd (n, dummy)
99 void *dummy ATTRIBUTE_UNUSED;
101 struct include_file *f = (struct include_file *)n->value;
102 if (f && f->fd != -1)
111 _cpp_init_includes (pfile)
114 pfile->all_include_files
115 = splay_tree_new ((splay_tree_compare_fn) strcmp,
116 (splay_tree_delete_key_fn) free,
117 destroy_include_file_node);
121 _cpp_cleanup_includes (pfile)
124 splay_tree_delete (pfile->all_include_files);
127 /* Given a filename, look it up and possibly open it. If the file
128 does not exist, return NULL. If the file does exist but doesn't
129 need to be reread, return an include_file entry with fd == -1.
130 If it needs to be (re)read, return an include_file entry with
131 fd a file descriptor open on the file. */
133 static struct include_file *
134 open_include_file (pfile, filename)
136 const char *filename;
139 struct include_file *file = 0;
142 nd = splay_tree_lookup (pfile->all_include_files,
143 (splay_tree_key) filename);
150 file = (struct include_file *)nd->value;
152 if (DO_NOT_REREAD (file))
162 /* File descriptors are cached for files that might be reread. */
165 lseek (file->fd, 0, SEEK_SET);
170 /* We used to open files in nonblocking mode, but that caused more
171 problems than it solved. Do take care not to acquire a
172 controlling terminal by mistake (this can't happen on sane
173 systems, but paranoia is a virtue).
175 Use the three-argument form of open even though we aren't
176 specifying O_CREAT, to defend against broken system headers.
178 O_BINARY tells some runtime libraries (notably DJGPP) not to do
179 newline translation; we can handle DOS line breaks just fine
182 Special case: the empty string is translated to stdin. */
185 if (filename[0] == '\0')
188 fd = open (filename, O_RDONLY|O_NOCTTY|O_BINARY, 0666);
195 cpp_error (pfile, "included file \"%s\" exists but is not readable",
208 /* Too many files open. Close all cached file descriptors and
210 splay_tree_foreach (pfile->all_include_files, close_cached_fd, 0);
214 /* Nonexistent or inaccessible file. Create a negative node for it. */
218 "node for '%s' exists, open failed, error '%s', value %lx\n",
219 filename, strerror (errno), nd->value);
220 destroy_include_file_node (nd->value);
222 splay_tree_insert (pfile->all_include_files,
223 (splay_tree_key) xstrdup (filename), 0);
227 /* If we haven't seen this file before, create a positive node for it. */
230 file = xnew (struct include_file);
232 file->include_count = 0;
235 file->name = xstrdup (filename);
236 splay_tree_insert (pfile->all_include_files,
237 (splay_tree_key) file->name,
238 (splay_tree_value) file);
242 file->date = (time_t) -1;
246 /* Return 1 if the file named by FNAME has been included before in
247 any context, 0 otherwise. */
249 cpp_included (pfile, fname)
253 struct file_name_list *path;
259 /* Just look it up. */
260 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) fname);
261 return (nd && nd->value);
264 /* Search directory path for the file. */
265 name = (char *) alloca (strlen (fname) + pfile->max_include_len
266 + 2 + INCLUDE_LEN_FUDGE);
267 for (path = CPP_OPTION (pfile, quote_include); path; path = path->next)
269 memcpy (name, path->name, path->nlen);
270 name[path->nlen] = '/';
271 strcpy (&name[path->nlen+1], fname);
272 _cpp_simplify_pathname (name);
273 if (CPP_OPTION (pfile, remap))
274 name = remap_filename (pfile, name, path);
276 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name);
283 /* Search for include file FNAME in the include chain starting at
284 SEARCH_START. Return 0 if there is no such file (or it's un-openable),
285 otherwise an include_file structure, possibly with a file descriptor
288 static struct include_file *
289 find_include_file (pfile, fname, search_start)
292 struct file_name_list *search_start;
294 struct file_name_list *path;
296 struct include_file *file;
299 return open_include_file (pfile, fname);
301 /* Search directory path for the file. */
302 name = (char *) alloca (strlen (fname) + pfile->max_include_len
303 + 2 + INCLUDE_LEN_FUDGE);
304 for (path = search_start; path; path = path->next)
306 memcpy (name, path->name, path->nlen);
307 name[path->nlen] = '/';
308 strcpy (&name[path->nlen+1], fname);
309 _cpp_simplify_pathname (name);
310 if (CPP_OPTION (pfile, remap))
311 name = remap_filename (pfile, name, path);
313 file = open_include_file (pfile, name);
316 file->sysp = path->sysp;
317 file->foundhere = path;
324 /* #line uses this to save artificial file names. We have to try
325 opening the file because an all_include_files entry is always
326 either + or -, there's no 'I don't know' value. */
328 _cpp_fake_include (pfile, fname)
333 struct include_file *file;
336 file = find_include_file (pfile, fname, CPP_OPTION (pfile, quote_include));
340 name = xstrdup (fname);
341 _cpp_simplify_pathname (name);
343 /* We cannot just blindly insert a node, because there's still the
344 chance that the node already exists but isn't on the search path. */
345 nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) name);
349 return (const char *) nd->key;
352 splay_tree_insert (pfile->all_include_files, (splay_tree_key) name, 0);
353 return (const char *)name;
356 /* Not everyone who wants to set system-header-ness on a buffer can
357 see the details of struct include_file. This is an exported interface
358 because fix-header needs it. */
360 cpp_make_system_header (pfile, pbuf, flag)
365 if (flag < 0 || flag > 2)
366 cpp_ice (pfile, "cpp_make_system_header: bad flag %d\n", flag);
368 cpp_ice (pfile, "cpp_make_system_header called on non-file buffer");
370 pbuf->inc->sysp = flag;
374 cpp_syshdr_flags (pfile, pbuf)
375 cpp_reader *pfile ATTRIBUTE_UNUSED;
378 #ifndef NO_IMPLICIT_EXTERN_C
379 if (CPP_OPTION (pfile, cplusplus) && pbuf->inc->sysp == 2)
387 /* Report on all files that might benefit from a multiple include guard.
390 _cpp_report_missing_guards (pfile)
394 splay_tree_foreach (pfile->all_include_files, report_missing_guard,
399 report_missing_guard (n, b)
403 struct include_file *f = (struct include_file *) n->value;
404 int *bannerp = (int *)b;
406 if (f && f->cmacro == 0 && f->include_count == 1)
410 fputs (_("Multiple include guards may be useful for:\n"), stderr);
413 fputs (f->name, stderr);
419 #define PRINT_THIS_DEP(p, b) (CPP_PRINT_DEPS(p) > (b||p->system_include_depth))
421 _cpp_execute_include (pfile, f, len, no_reinclude, search_start, angle_brackets)
426 struct file_name_list *search_start;
429 struct include_file *inc;
435 search_start = CPP_OPTION (pfile, bracket_include);
436 else if (CPP_OPTION (pfile, ignore_srcdir))
437 search_start = CPP_OPTION (pfile, quote_include);
439 search_start = CPP_BUFFER (pfile)->actual_dir;
444 cpp_error (pfile, "No include path in which to find %s", f);
448 fname = alloca (len + 1);
449 memcpy (fname, f, len);
452 inc = find_include_file (pfile, fname, search_start);
459 /* For -M, add the file to the dependencies on its first inclusion. */
460 if (!inc->include_count && PRINT_THIS_DEP (pfile, angle_brackets))
461 deps_add_dep (pfile->deps, inc->name);
462 inc->include_count++;
464 /* Handle -H option. */
465 if (CPP_OPTION (pfile, print_include_names))
467 cpp_buffer *fp = CPP_BUFFER (pfile);
468 while ((fp = CPP_PREV_BUFFER (fp)) != NULL)
470 fprintf (stderr, " %s\n", inc->name);
473 /* Actually process the file. */
475 inc->cmacro = NEVER_REREAD;
477 if (read_include_file (pfile, inc))
480 pfile->system_include_depth++;
485 if (CPP_OPTION (pfile, print_deps_missing_files)
486 && PRINT_THIS_DEP (pfile, angle_brackets))
489 deps_add_dep (pfile->deps, fname);
493 struct file_name_list *ptr;
494 /* If requested as a system header, assume it belongs in
495 the first system header directory. */
496 if (CPP_OPTION (pfile, bracket_include))
497 ptr = CPP_OPTION (pfile, bracket_include);
499 ptr = CPP_OPTION (pfile, quote_include);
501 p = (char *) alloca (strlen (ptr->name)
502 + strlen (fname) + 2);
503 if (*ptr->name != '\0')
505 strcpy (p, ptr->name);
509 _cpp_simplify_pathname (p);
510 deps_add_dep (pfile->deps, p);
513 /* If -M was specified, and this header file won't be added to
514 the dependency list, then don't count this as an error,
515 because we can still produce correct output. Otherwise, we
516 can't produce correct output, because there may be
517 dependencies we need inside the missing file, and we don't
518 know what directory this missing file exists in. */
519 else if (CPP_PRINT_DEPS (pfile)
520 && ! PRINT_THIS_DEP (pfile, angle_brackets))
521 cpp_warning (pfile, "No include path in which to find %s", fname);
523 cpp_error_from_errno (pfile, fname);
526 /* Locate file F, and determine whether it is newer than PFILE. Return -1,
527 if F cannot be located or dated, 1, if it is newer and 0 if older. */
530 _cpp_compare_file_date (pfile, f, len, angle_brackets)
537 struct file_name_list *search_start;
538 struct include_file *inc;
539 struct include_file *current_include = CPP_BUFFER (pfile)->inc;
542 search_start = CPP_OPTION (pfile, bracket_include);
543 else if (CPP_OPTION (pfile, ignore_srcdir))
544 search_start = CPP_OPTION (pfile, quote_include);
546 search_start = CPP_BUFFER (pfile)->actual_dir;
548 fname = alloca (len + 1);
549 memcpy (fname, f, len);
551 inc = find_include_file (pfile, fname, search_start);
559 if (fstat (inc->fd, &source) < 0)
565 inc->date = source.st_mtime;
569 if (inc->date == (time_t)-1 || current_include->date == (time_t)-1)
571 return inc->date > current_include->date;
575 /* Push an input buffer and load it up with the contents of FNAME.
576 If FNAME is "" or NULL, read standard input. */
578 cpp_read_file (pfile, fname)
582 struct include_file *f;
587 f = open_include_file (pfile, fname);
591 cpp_error_from_errno (pfile, fname);
595 return read_include_file (pfile, f);
598 /* Read the file referenced by INC into a new buffer on PFILE's stack.
599 Return 1 if successful, 0 if not. */
602 read_include_file (pfile, inc)
604 struct include_file *inc;
611 fp = cpp_push_buffer (pfile, NULL, 0);
616 if (fd < 0 || fstat (fd, &st) < 0)
619 /* These must be set right away. */
620 inc->date = st.st_mtime;
622 fp->nominal_fname = inc->name;
624 /* If fd points to a plain file, we might be able to mmap it; we can
625 definitely allocate the buffer all at once. If fd is a pipe or
626 terminal, we can't do either. If fd is something weird, like a
627 block device or a directory, we don't want to read it at all.
629 Unfortunately, different systems use different st.st_mode values
630 for pipes: some have S_ISFIFO, some S_ISSOCK, some are buggy and
631 zero the entire struct stat except a couple fields. Hence we don't
632 even try to figure out what something is, except for plain files,
633 directories, and block devices. */
635 if (S_ISREG (st.st_mode))
639 /* off_t might have a wider range than ssize_t - in other words,
640 the max size of a file might be bigger than the address
641 space. We can't handle a file that large. (Anyone with
642 a single source file bigger than 2GB needs to rethink
643 their coding style.) Some systems (e.g. AIX 4.1) define
644 SSIZE_MAX to be much smaller than the actual range of the
645 type. Use INTTYPE_MAXIMUM unconditionally to ensure this
647 if (st.st_size > INTTYPE_MAXIMUM (ssize_t))
649 cpp_error (pfile, "%s is too large", inc->name);
652 st_size = st.st_size;
653 length = read_file (fp, fd, st_size);
656 if (length < st_size)
657 cpp_warning (pfile, "%s is shorter than expected\n", inc->name);
659 else if (S_ISBLK (st.st_mode))
661 cpp_error (pfile, "%s is a block device", inc->name);
664 else if (S_ISDIR (st.st_mode))
666 cpp_error (pfile, "%s is a directory", inc->name);
671 /* 8 kilobytes is a sensible starting size. It ought to be
672 bigger than the kernel pipe buffer, and it's definitely
673 bigger than the majority of C source files. */
674 length = read_with_read (fp, fd, 8 * 1024);
680 inc->cmacro = NEVER_REREAD;
682 fp->rlimit = fp->buf + length;
685 fp->line_base = fp->buf;
687 /* The ->actual_dir field is only used when ignore_srcdir is not in effect;
689 if (!CPP_OPTION (pfile, ignore_srcdir))
690 fp->actual_dir = actual_directory (pfile, inc->name);
692 pfile->include_depth++;
693 pfile->input_stack_listing_current = 0;
694 if (pfile->cb.enter_file)
695 (*pfile->cb.enter_file) (pfile);
699 cpp_error_from_errno (pfile, inc->name);
700 /* Do not try to read this file again. */
704 inc->cmacro = NEVER_REREAD;
706 cpp_pop_buffer (pfile);
712 read_file (fp, fd, size)
717 static int pagesize = -1;
723 pagesize = getpagesize ();
726 if (size / pagesize >= MMAP_THRESHOLD)
729 = (const U_CHAR *) mmap (0, size, PROT_READ, MAP_PRIVATE, fd, 0);
730 if (result != (const U_CHAR *)-1)
737 /* If mmap fails, try read. If there's really a problem, read will
741 return read_with_read (fp, fd, size);
745 read_with_read (fp, fd, size)
750 ssize_t offset, count;
753 buf = (U_CHAR *) xmalloc (size);
755 while ((count = read (fd, buf + offset, size - offset)) > 0)
759 buf = xrealloc (buf, (size *= 2));
773 buf = xrealloc (buf, offset);
779 /* Do appropriate cleanup when a file buffer is popped off the input
782 _cpp_pop_file_buffer (pfile, buf)
786 struct include_file *inc = buf->inc;
788 if (pfile->system_include_depth)
789 pfile->system_include_depth--;
790 if (pfile->include_depth)
791 pfile->include_depth--;
792 if (pfile->potential_control_macro)
794 if (inc->cmacro != NEVER_REREAD)
795 inc->cmacro = pfile->potential_control_macro;
796 pfile->potential_control_macro = 0;
798 pfile->input_stack_listing_current = 0;
800 /* Discard file buffer. XXX Would be better to cache these instead
801 of the file descriptors. */
802 #ifdef HAVE_MMAP_FILE
804 munmap ((caddr_t) buf->buf, buf->rlimit - buf->buf);
807 free ((PTR) buf->buf);
809 /* If the file will not be included again, close it. */
810 if (DO_NOT_REREAD (inc))
817 /* The file_name_map structure holds a mapping of file names for a
818 particular directory. This mapping is read from the file named
819 FILE_NAME_MAP_FILE in that directory. Such a file can be used to
820 map filenames on a file system with severe filename restrictions,
821 such as DOS. The format of the file name map file is just a series
822 of lines with two tokens on each line. The first token is the name
823 to map, and the second token is the actual name to use. */
827 struct file_name_map *map_next;
832 #define FILE_NAME_MAP_FILE "header.gcc"
834 /* Read a space delimited string of unlimited length from a stdio
838 read_filename_string (ch, f)
846 set = alloc = xmalloc (len + 1);
850 while ((ch = getc (f)) != EOF && ! is_space(ch))
852 if (set - alloc == len)
855 alloc = xrealloc (alloc, len + 1);
856 set = alloc + len / 2;
866 /* This structure holds a linked list of file name maps, one per directory. */
868 struct file_name_map_list
870 struct file_name_map_list *map_list_next;
872 struct file_name_map *map_list_map;
875 /* Read the file name map file for DIRNAME. */
877 static struct file_name_map *
878 read_name_map (pfile, dirname)
882 register struct file_name_map_list *map_list_ptr;
886 for (map_list_ptr = CPP_OPTION (pfile, map_list); map_list_ptr;
887 map_list_ptr = map_list_ptr->map_list_next)
888 if (! strcmp (map_list_ptr->map_list_name, dirname))
889 return map_list_ptr->map_list_map;
891 map_list_ptr = ((struct file_name_map_list *)
892 xmalloc (sizeof (struct file_name_map_list)));
893 map_list_ptr->map_list_name = xstrdup (dirname);
894 map_list_ptr->map_list_map = NULL;
896 name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2);
897 strcpy (name, dirname);
900 strcat (name, FILE_NAME_MAP_FILE);
901 f = fopen (name, "r");
903 map_list_ptr->map_list_map = (struct file_name_map *)-1;
907 int dirlen = strlen (dirname);
909 while ((ch = getc (f)) != EOF)
912 struct file_name_map *ptr;
916 from = read_filename_string (ch, f);
917 while ((ch = getc (f)) != EOF && is_hspace(ch))
919 to = read_filename_string (ch, f);
921 ptr = ((struct file_name_map *)
922 xmalloc (sizeof (struct file_name_map)));
923 ptr->map_from = from;
925 /* Make the real filename absolute. */
930 ptr->map_to = xmalloc (dirlen + strlen (to) + 2);
931 strcpy (ptr->map_to, dirname);
932 ptr->map_to[dirlen] = '/';
933 strcpy (ptr->map_to + dirlen + 1, to);
937 ptr->map_next = map_list_ptr->map_list_map;
938 map_list_ptr->map_list_map = ptr;
940 while ((ch = getc (f)) != '\n')
947 map_list_ptr->map_list_next = CPP_OPTION (pfile, map_list);
948 CPP_OPTION (pfile, map_list) = map_list_ptr;
950 return map_list_ptr->map_list_map;
953 /* Remap NAME based on the file_name_map (if any) for LOC. */
956 remap_filename (pfile, name, loc)
959 struct file_name_list *loc;
961 struct file_name_map *map;
962 const char *from, *p, *dir;
965 loc->name_map = read_name_map (pfile,
969 if (loc->name_map == (struct file_name_map *)-1)
972 from = name + strlen (loc->name) + 1;
974 for (map = loc->name_map; map; map = map->map_next)
975 if (!strcmp (map->map_from, from))
978 /* Try to find a mapping file for the particular directory we are
979 looking in. Thus #include <sys/types.h> will look up sys/types.h
980 in /usr/include/header.gcc and look up types.h in
981 /usr/include/sys/header.gcc. */
982 p = strrchr (name, '/');
986 && strlen (loc->name) == (size_t) (p - name)
987 && !strncmp (loc->name, name, p - name))
988 /* FILENAME is in SEARCHPTR, which we've already checked. */
998 char * newdir = (char *) alloca (p - name + 1);
999 memcpy (newdir, name, p - name);
1000 newdir[p - name] = '\0';
1005 for (map = read_name_map (pfile, dir); map; map = map->map_next)
1006 if (! strcmp (map->map_from, name))
1012 /* Given a path FNAME, extract the directory component and place it
1013 onto the actual_dirs list. Return a pointer to the allocated
1014 file_name_list structure. These structures are used to implement
1015 current-directory "" include searching. */
1017 static struct file_name_list *
1018 actual_directory (pfile, fname)
1022 char *last_slash, *dir;
1024 struct file_name_list *x;
1026 dir = xstrdup (fname);
1027 last_slash = strrchr (dir, '/');
1030 if (last_slash == dir)
1033 last_slash[1] = '\0';
1037 dlen = last_slash - dir;
1044 dir = xstrdup (".");
1048 if (dlen > pfile->max_include_len)
1049 pfile->max_include_len = dlen;
1051 for (x = pfile->actual_dirs; x; x = x->alloc)
1052 if (!strcmp (x->name, dir))
1058 /* Not found, make a new one. */
1059 x = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
1062 x->next = CPP_OPTION (pfile, quote_include);
1063 x->alloc = pfile->actual_dirs;
1064 x->sysp = CPP_BUFFER (pfile)->inc->sysp;
1067 pfile->actual_dirs = x;
1071 /* Simplify a path name in place, deleting redundant components. This
1072 reduces OS overhead and guarantees that equivalent paths compare
1073 the same (modulo symlinks).
1076 foo/bar/../quux foo/quux
1080 //quux //quux (POSIX allows leading // as a namespace escape)
1082 Guarantees no trailing slashes. All transforms reduce the length
1086 _cpp_simplify_pathname (path)
1093 #if defined (HAVE_DOS_BASED_FILE_SYSTEM)
1094 /* Convert all backslashes to slashes. */
1095 for (from = path; *from; from++)
1096 if (*from == '\\') *from = '/';
1098 /* Skip over leading drive letter if present. */
1099 if (ISALPHA (path[0]) && path[1] == ':')
1100 from = to = &path[2];
1107 /* Remove redundant initial /s. */
1116 /* 3 or more initial /s are equivalent to 1 /. */
1117 while (*++from == '/');
1119 /* On some hosts // differs from /; Posix allows this. */
1127 while (*from == '/')
1130 if (from[0] == '.' && from[1] == '/')
1132 else if (from[0] == '.' && from[1] == '\0')
1134 else if (from[0] == '.' && from[1] == '.' && from[2] == '/')
1151 while (to > base && *to != '/') to--;
1157 else if (from[0] == '.' && from[1] == '.' && from[2] == '\0')
1170 while (to > base && *to != '/') to--;
1177 /* Copy this component and trailing /, if any. */
1178 while ((*to++ = *from++) != '/')
1190 /* Trim trailing slash */
1191 if (to[0] == '/' && (!absolute || to > path+1))
1194 /* Change the empty string to "." so that stat() on the result
1195 will always work. */
1204 /* It is not clear when this should be used if at all, so I've
1205 disabled it until someone who understands VMS can look at it. */
1208 /* Under VMS we need to fix up the "include" specification filename.
1210 Rules for possible conversions
1212 fullname tried paths
1215 ./dir/name [.dir]name
1217 /name [000000]name, name
1218 dir/name dir:[000000]name, dir:name, dir/name
1219 dir1/dir2/name dir1:[dir2]name, dir1:[000000.dir2]name
1220 path:/name path:[000000]name, path:name
1221 path:/dir/name path:[000000.dir]name, path:[dir]name
1222 path:dir/name path:[dir]name
1223 [path]:[dir]name [path.dir]name
1224 path/[dir]name [path.dir]name
1226 The path:/name input is constructed when expanding <> includes. */
1230 hack_vms_include_specification (fullname)
1233 register char *basename, *unixname, *local_ptr, *first_slash;
1234 int f, check_filename_before_returning, must_revert;
1237 check_filename_before_returning = 0;
1239 /* See if we can find a 1st slash. If not, there's no path information. */
1240 first_slash = strchr (fullname, '/');
1241 if (first_slash == 0)
1242 return 0; /* Nothing to do!!! */
1244 /* construct device spec if none given. */
1246 if (strchr (fullname, ':') == 0)
1249 /* If fullname has a slash, take it as device spec. */
1251 if (first_slash == fullname)
1253 first_slash = strchr (fullname + 1, '/'); /* 2nd slash ? */
1255 *first_slash = ':'; /* make device spec */
1256 for (basename = fullname; *basename != 0; basename++)
1257 *basename = *(basename+1); /* remove leading slash */
1259 else if ((first_slash[-1] != '.') /* keep ':/', './' */
1260 && (first_slash[-1] != ':')
1261 && (first_slash[-1] != ']')) /* or a vms path */
1265 else if ((first_slash[1] == '[') /* skip './' in './[dir' */
1266 && (first_slash[-1] == '.'))
1270 /* Get part after first ':' (basename[-1] == ':')
1271 or last '/' (basename[-1] == '/'). */
1273 basename = base_name (fullname);
1275 local_ptr = Local; /* initialize */
1277 /* We are trying to do a number of things here. First of all, we are
1278 trying to hammer the filenames into a standard format, such that later
1279 processing can handle them.
1281 If the file name contains something like [dir.], then it recognizes this
1282 as a root, and strips the ".]". Later processing will add whatever is
1283 needed to get things working properly.
1285 If no device is specified, then the first directory name is taken to be
1286 a device name (or a rooted logical). */
1288 /* Point to the UNIX filename part (which needs to be fixed!)
1289 but skip vms path information.
1290 [basename != fullname since first_slash != 0]. */
1292 if ((basename[-1] == ':') /* vms path spec. */
1293 || (basename[-1] == ']')
1294 || (basename[-1] == '>'))
1295 unixname = basename;
1297 unixname = fullname;
1299 if (*unixname == '/')
1302 /* If the directory spec is not rooted, we can just copy
1303 the UNIX filename part and we are done. */
1305 if (((basename - fullname) > 1)
1306 && ( (basename[-1] == ']')
1307 || (basename[-1] == '>')))
1309 if (basename[-2] != '.')
1312 /* The VMS part ends in a `]', and the preceding character is not a `.'.
1313 -> PATH]:/name (basename = '/name', unixname = 'name')
1314 We strip the `]', and then splice the two parts of the name in the
1315 usual way. Given the default locations for include files,
1316 we will only use this code if the user specifies alternate locations
1317 with the /include (-I) switch on the command line. */
1319 basename -= 1; /* Strip "]" */
1320 unixname--; /* backspace */
1325 /* The VMS part has a ".]" at the end, and this will not do. Later
1326 processing will add a second directory spec, and this would be a syntax
1327 error. Thus we strip the ".]", and thus merge the directory specs.
1328 We also backspace unixname, so that it points to a '/'. This inhibits the
1329 generation of the 000000 root directory spec (which does not belong here
1332 basename -= 2; /* Strip ".]" */
1333 unixname--; /* backspace */
1341 /* We drop in here if there is no VMS style directory specification yet.
1342 If there is no device specification either, we make the first dir a
1343 device and try that. If we do not do this, then we will be essentially
1344 searching the users default directory (as if they did a #include "asdf.h").
1346 Then all we need to do is to push a '[' into the output string. Later
1347 processing will fill this in, and close the bracket. */
1349 if ((unixname != fullname) /* vms path spec found. */
1350 && (basename[-1] != ':'))
1351 *local_ptr++ = ':'; /* dev not in spec. take first dir */
1353 *local_ptr++ = '['; /* Open the directory specification */
1356 if (unixname == fullname) /* no vms dir spec. */
1359 if ((first_slash != 0) /* unix dir spec. */
1360 && (*unixname != '/') /* not beginning with '/' */
1361 && (*unixname != '.')) /* or './' or '../' */
1362 *local_ptr++ = '.'; /* dir is local ! */
1365 /* at this point we assume that we have the device spec, and (at least
1366 the opening "[" for a directory specification. We may have directories
1369 If there are no other slashes then the filename will be
1370 in the "root" directory. Otherwise, we need to add
1371 directory specifications. */
1373 if (strchr (unixname, '/') == 0)
1375 /* if no directories specified yet and none are following. */
1376 if (local_ptr[-1] == '[')
1378 /* Just add "000000]" as the directory string */
1379 strcpy (local_ptr, "000000]");
1380 local_ptr += strlen (local_ptr);
1381 check_filename_before_returning = 1; /* we might need to fool with this later */
1387 /* As long as there are still subdirectories to add, do them. */
1388 while (strchr (unixname, '/') != 0)
1390 /* If this token is "." we can ignore it
1391 if it's not at the beginning of a path. */
1392 if ((unixname[0] == '.') && (unixname[1] == '/'))
1394 /* remove it at beginning of path. */
1395 if ( ((unixname == fullname) /* no device spec */
1396 && (fullname+2 != basename)) /* starts with ./ */
1398 || ((basename[-1] == ':') /* device spec */
1399 && (unixname-1 == basename))) /* and ./ afterwards */
1400 *local_ptr++ = '.'; /* make '[.' start of path. */
1405 /* Add a subdirectory spec. Do not duplicate "." */
1406 if ( local_ptr[-1] != '.'
1407 && local_ptr[-1] != '['
1408 && local_ptr[-1] != '<')
1411 /* If this is ".." then the spec becomes "-" */
1412 if ( (unixname[0] == '.')
1413 && (unixname[1] == '.')
1414 && (unixname[2] == '/'))
1416 /* Add "-" and skip the ".." */
1417 if ((local_ptr[-1] == '.')
1418 && (local_ptr[-2] == '['))
1419 local_ptr--; /* prevent [.- */
1425 /* Copy the subdirectory */
1426 while (*unixname != '/')
1427 *local_ptr++= *unixname++;
1429 unixname++; /* Skip the "/" */
1432 /* Close the directory specification */
1433 if (local_ptr[-1] == '.') /* no trailing periods */
1436 if (local_ptr[-1] == '[') /* no dir needed */
1442 /* Now add the filename. */
1445 *local_ptr++ = *unixname++;
1448 /* Now append it to the original VMS spec. */
1450 strcpy ((must_revert==1)?fullname:basename, Local);
1452 /* If we put a [000000] in the filename, try to open it first. If this fails,
1453 remove the [000000], and return that name. This provides flexibility
1454 to the user in that they can use both rooted and non-rooted logical names
1455 to point to the location of the file. */
1457 if (check_filename_before_returning)
1459 f = open (fullname, O_RDONLY|O_NONBLOCK);
1462 /* The file name is OK as it is, so return it as is. */
1467 /* The filename did not work. Try to remove the [000000] from the name,
1470 basename = strchr (fullname, '[');
1471 local_ptr = strchr (fullname, ']') + 1;
1472 strcpy (basename, local_ptr); /* this gets rid of it */