/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdlib.h> #include <string.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <dirent.h> #include <malloc.h> #include <fnmatch.h> #include <glob.h> __ptr_t (*__glob_opendir_hook) __P ((const char *directory)); const char *(*__glob_readdir_hook) __P ((__ptr_t stream)); void (*__glob_closedir_hook) __P ((__ptr_t stream)); static int glob_pattern_p __P ((const char *pattern, int quote)); static int glob_in_dir __P ((const char *pattern, const char *directory, int flags, int (*errfunc) __P ((const char *, int)), glob_t *pglob)); static int prefix_array __P ((const char *prefix, char **array, size_t n, int add_slash)); static int collated_compare __P ((const __ptr_t, const __ptr_t)); /* Do glob searching for PATTERN, placing results in PGLOB. The bits defined above may be set in FLAGS. If a directory cannot be opened or read and ERRFUNC is not nil, it is called with the pathname that caused the error, and the `errno' value from the failing call; if it returns non-zero `glob' returns GLOB_ABEND; if it returns zero, the error is ignored. If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned. Otherwise, `glob' returns zero. */ int glob (pattern, flags, errfunc, pglob) const char *pattern; int flags; int (*errfunc) __P ((const char *, int)); glob_t *pglob; { const char *filename; char *dirname; size_t dirlen; int status; int oldcount; if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0) { errno = EINVAL; return -1; } /* Find the filename. */ filename = strrchr (pattern, '/'); if (filename == NULL) { filename = pattern; dirname = (char *) "."; dirlen = 0; } else if (filename == pattern) { /* "/pattern". */ dirname = (char *) "/"; dirlen = 1; ++filename; } else { dirlen = filename - pattern; dirname = (char *) alloca (dirlen + 1); memcpy (dirname, pattern, dirlen); dirname[dirlen] = '\0'; ++filename; } if (filename[0] == '\0' && dirlen > 1) /* "pattern/". Expand "pattern", appending slashes. */ { int val = glob (dirname, flags | GLOB_MARK, errfunc, pglob); if (val == 0) pglob->gl_flags = (pglob->gl_flags & ~GLOB_MARK) | (flags & GLOB_MARK); return val; } if (!(flags & GLOB_APPEND)) { pglob->gl_pathc = 0; pglob->gl_pathv = NULL; } oldcount = pglob->gl_pathc; if (glob_pattern_p (dirname, !(flags & GLOB_NOESCAPE))) { /* The directory name contains metacharacters, so we have to glob for the directory, and then glob for the pattern in each directory found. */ glob_t dirs; register int i; status = glob (dirname, ((flags & (GLOB_ERR | GLOB_NOCHECK | GLOB_NOESCAPE)) | GLOB_NOSORT), errfunc, &dirs); if (status != 0) return status; /* We have successfully globbed the preceding directory name. For each name we found, call glob_in_dir on it and FILENAME, appending the results to PGLOB. */ for (i = 0; i < dirs.gl_pathc; ++i) { int oldcount; #ifdef SHELL { /* Make globbing interruptible in the bash shell. */ extern int interrupt_state; if (interrupt_state) { globfree (&dirs); globfree (&files); return GLOB_ABEND; } } #endif /* SHELL. */ oldcount = pglob->gl_pathc; status = glob_in_dir (filename, dirs.gl_pathv[i], (flags | GLOB_APPEND) & ~GLOB_NOCHECK, errfunc, pglob); if (status == GLOB_NOMATCH) /* No matches in this directory. Try the next. */ continue; if (status != 0) { globfree (&dirs); globfree (pglob); return status; } /* Stick the directory on the front of each name. */ if (prefix_array (dirs.gl_pathv[i], &pglob->gl_pathv[oldcount], pglob->gl_pathc - oldcount, flags & GLOB_MARK)) { globfree (&dirs); globfree (pglob); return GLOB_NOSPACE; } } flags |= GLOB_MAGCHAR; if (pglob->gl_pathc == oldcount) { /* No matches. */ if (flags & GLOB_NOCHECK) { size_t len = strlen (pattern) + 1; char *patcopy = (char *) malloc (len); if (patcopy == NULL) return GLOB_NOSPACE; memcpy (patcopy, pattern, len); pglob->gl_pathv = (char **) realloc (pglob->gl_pathv, (pglob->gl_pathc + ((flags & GLOB_DOOFFS) ? pglob->gl_offs : 0) + 1 + 1) * sizeof (char *)); if (pglob->gl_pathv == NULL) { free (patcopy); return GLOB_NOSPACE; } if (flags & GLOB_DOOFFS) while (pglob->gl_pathc < pglob->gl_offs) pglob->gl_pathv[pglob->gl_pathc++] = NULL; pglob->gl_pathv[pglob->gl_pathc++] = patcopy; pglob->gl_pathv[pglob->gl_pathc] = NULL; pglob->gl_flags = flags; } else { return GLOB_NOMATCH; } } } else { status = glob_in_dir (filename, dirname, flags, errfunc, pglob); if (status != 0) return status; if (dirlen > 0) { /* Stick the directory on the front of each name. */ if (prefix_array (dirname, &pglob->gl_pathv[oldcount], pglob->gl_pathc - oldcount, flags & GLOB_MARK)) { globfree (pglob); return GLOB_NOSPACE; } } } if (flags & GLOB_MARK) { /* Append slashes to directory names. glob_in_dir has already allocated the extra character for us. */ int i; struct stat st; for (i = oldcount; i < pglob->gl_pathc; ++i) if (lstat (pglob->gl_pathv[i], &st) == 0 && S_ISDIR (st.st_mode)) strcat (pglob->gl_pathv[i], "/"); } if (!(flags & GLOB_NOSORT)) /* Sort the vector. */ qsort ((__ptr_t) &pglob->gl_pathv[oldcount], pglob->gl_pathc - oldcount, sizeof (char *), (__compar_fn_t)collated_compare); return 0; } /* Free storage allocated in PGLOB by a previous `glob' call. */ void globfree (pglob) register glob_t *pglob; { if (pglob->gl_pathv != NULL) { register int i; for (i = 0; i < pglob->gl_pathc; ++i) if (pglob->gl_pathv[i] != NULL) free ((__ptr_t) pglob->gl_pathv[i]); free ((__ptr_t) pglob->gl_pathv); } } /* Do a collated comparison of A and B. */ static int collated_compare (a, b) const __ptr_t a; const __ptr_t b; { const char *const s1 = *(const char *const * const) a; const char *const s2 = *(const char *const * const) b; if (s1 == s2) return 0; if (s1 == NULL) return 1; if (s2 == NULL) return -1; return strcoll (s1, s2); } /* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's elements in place. Return nonzero if out of memory, zero if successful. A slash is inserted between DIRNAME and each elt of ARRAY, unless DIRNAME is just "/". Each old element of ARRAY is freed. If ADD_SLASH is non-zero, allocate one character more than necessary, so that a slash can be appended later. */ static int prefix_array (dirname, array, n, add_slash) const char *dirname; char **array; size_t n; int add_slash; { register size_t i; size_t dirlen = strlen (dirname); if (dirlen == 1 && dirname[0] == '/') /* DIRNAME is just "/", so normal prepending would get us "//foo". We want "/foo" instead, so don't prepend any chars from DIRNAME. */ dirlen = 0; for (i = 0; i < n; ++i) { size_t eltlen = strlen (array[i]) + 1; char *new = (char *) malloc (dirlen + 1 + eltlen + (add_slash ? 1 : 0)); if (new == NULL) { while (i > 0) free ((__ptr_t) array[--i]); return 1; } memcpy (new, dirname, dirlen); new[dirlen] = '/'; memcpy (&new[dirlen + 1], array[i], eltlen); free ((__ptr_t) array[i]); array[i] = new; } return 0; } /* Return nonzero if PATTERN contains any metacharacters. Metacharacters can be quoted with backslashes if QUOTE is nonzero. */ static int glob_pattern_p (pattern, quote) const char *pattern; int quote; { register const char *p; int open = 0; for (p = pattern; *p != '\0'; ++p) switch (*p) { case '?': case '*': return 1; case '\\': if (quote) ++p; break; case '[': open = 1; break; case ']': if (open) return 1; break; } return 0; } /* Like `glob', but PATTERN is a final pathname component, and matches are searched for in DIRECTORY. The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done. The GLOB_APPEND flag is assumed to be set (always appends). */ static int glob_in_dir (pattern, directory, flags, errfunc, pglob) const char *pattern; const char *directory; int flags; int (*errfunc) __P ((const char *, int)); glob_t *pglob; { __ptr_t stream; struct globlink { struct globlink *next; char *name; }; struct globlink *names = NULL; size_t nfound = 0; int meta; stream = (__glob_opendir_hook ? (*__glob_opendir_hook) (directory) : (__ptr_t) opendir (directory)); if (stream == NULL) { if ((errfunc != NULL && (*errfunc) (directory, errno)) || (flags & GLOB_ERR)) return GLOB_ABORTED; } meta = glob_pattern_p (pattern, !(flags & GLOB_NOESCAPE)); if (meta) flags |= GLOB_MAGCHAR; while (1) { const char *name; size_t len; if (__glob_readdir_hook) { name = (*__glob_readdir_hook) (stream); if (name == NULL) break; len = 0; } else { struct dirent *d = readdir ((DIR *) stream); if (d == NULL) break; if (! (d->d_ino != 0)) continue; name = d->d_name; #ifdef HAVE_D_NAMLEN len = d->d_namlen; #else len = 0; #endif } if ((!meta && strcmp (pattern, name) == 0) || fnmatch (pattern, name, (!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)) == 0) { struct globlink *new = (struct globlink *) alloca (sizeof (struct globlink)); if (len == 0) len = strlen (name); new->name = (char *) malloc (len + ((flags & GLOB_MARK) ? 1 : 0) + 1); if (new->name == NULL) goto memory_error; memcpy ((__ptr_t) new->name, name, len); new->name[len] = '\0'; new->next = names; names = new; ++nfound; if (!meta) break; } } if (nfound == 0 && (flags & GLOB_NOCHECK)) { size_t len = strlen (pattern); nfound = 1; names = (struct globlink *) alloca (sizeof (struct globlink)); names->next = NULL; names->name = (char *) malloc (len + (flags & GLOB_MARK ? 1 : 0) + 1); if (names->name == NULL) goto memory_error; memcpy (names->name, pattern, len); names->name[len] = '\0'; } pglob->gl_pathv = (char **) realloc (pglob->gl_pathv, (pglob->gl_pathc + ((flags & GLOB_DOOFFS) ? pglob->gl_offs : 0) + nfound + 1) * sizeof (char *)); if (pglob->gl_pathv == NULL) goto memory_error; if (flags & GLOB_DOOFFS) while (pglob->gl_pathc < pglob->gl_offs) pglob->gl_pathv[pglob->gl_pathc++] = NULL; for (; names != NULL; names = names->next) pglob->gl_pathv[pglob->gl_pathc++] = names->name; pglob->gl_pathv[pglob->gl_pathc] = NULL; pglob->gl_flags = flags; { int save = errno; if (__glob_closedir_hook) (*__glob_closedir_hook) (stream); else (void) closedir ((DIR *) stream); errno = save; } return nfound == 0 ? GLOB_NOMATCH : 0; memory_error: { int save = errno; if (__glob_closedir_hook) (*__glob_closedir_hook) (stream); else (void) closedir ((DIR *) stream); errno = save; } while (names != NULL) { if (names->name != NULL) free ((__ptr_t) names->name); names = names->next; } return GLOB_NOSPACE; }