/* dir.c: directory operations. Copyright 1992, 1993, 1994, 1995, 2008-2012 Karl Berry. Copyright 2000, 2002, 2005 Olaf Weber. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see . */ #include #include #include #include #include /* Return true if FN is a directory or a symlink to a directory, false if not. */ boolean kpathsea_dir_p (kpathsea kpse, string fn) { /* FIXME : using the stat() replacement in gnuw32, we could avoid this win32 specific code. However, I wonder if it would be as fast as this one is ? */ #ifdef WIN32 int fa; kpathsea_normalize_path(kpse, fn); fa = GetFileAttributes(fn); #ifdef KPSE_DEBUG if (KPATHSEA_DEBUG_P (KPSE_DEBUG_STAT)) { if (fa == 0xFFFFFFFF) { fprintf(stderr, "failed to get file attributes for %s (%d)\n", fn, (int)(GetLastError())); } else { fprintf(stderr, "path %s %s a directory\n", fn , (fa & FILE_ATTRIBUTE_DIRECTORY) ? "is" : "is not"); } } #endif /* KPSE_DEBUG */ return (fa != 0xFFFFFFFF && (fa & FILE_ATTRIBUTE_DIRECTORY)); #else /* !WIN32 */ struct stat stats; return stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode); #endif /* !WIN32 */ } #if defined(KPSE_COMPAT_API) boolean dir_p (string fn) { return kpathsea_dir_p (kpse_def, fn); } #endif /* Return -1 if FN isn't a directory, else its number of links. Duplicate the call to stat; no need to incur overhead of a function call for that little bit of cleanliness. The process is a bit different under Win32 : the first call memoizes the nlinks value, the following ones retrieve it. */ int kpathsea_dir_links (kpathsea kpse, const_string fn, long nlinks) { const_string *hash_ret; if (kpse->link_table.size == 0) kpse->link_table = hash_create (457); #ifdef KPSE_DEBUG /* This is annoying, but since we're storing integers as pointers, we can't print them as strings. */ if (KPATHSEA_DEBUG_P (KPSE_DEBUG_HASH)) kpse->debug_hash_lookup_int = true; #endif hash_ret = hash_lookup (kpse->link_table, fn); #ifdef KPSE_DEBUG if (KPATHSEA_DEBUG_P (KPSE_DEBUG_HASH)) kpse->debug_hash_lookup_int = false; #endif /* Have to cast the int we need to/from the const_string that the hash table stores for values. Let's hope an int fits in a pointer. */ if (hash_ret) { #ifdef WIN32 memcpy(&nlinks, hash_ret, sizeof(nlinks)); #else nlinks = (long) *hash_ret; #endif } else { #ifdef WIN32 /* Insert it only if we have some informations about it. */ if (nlinks) { char str_nlinks[sizeof(nlinks)+1]; memcpy(str_nlinks, (char *)&nlinks, sizeof(nlinks)); str_nlinks[sizeof(nlinks)] = '\0'; /* It's up to us to copy the value. */ hash_insert(&(kpse->link_table), xstrdup (fn), (const_string) str_nlinks); } #else struct stat stats; if (stat (fn, &stats) == 0 && S_ISDIR (stats.st_mode)) nlinks = stats.st_nlink; else nlinks = -1; /* It's up to us to copy the value. */ hash_insert(&(kpse->link_table), xstrdup(fn), (const_string)nlinks); #endif #ifdef KPSE_DEBUG if (KPATHSEA_DEBUG_P (KPSE_DEBUG_STAT)) DEBUGF2 ("dir_links(%s) => %ld\n", fn, nlinks); #endif } /* In any case, return nlinks (either 0, the value inserted or the value retrieved. */ return nlinks; } #if defined (KPSE_COMPAT_API) int dir_links (const_string fn, long nlinks) { return kpathsea_dir_links (kpse_def, fn, nlinks); } #endif