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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /posix/glob.c
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initial import
Diffstat (limited to 'posix/glob.c')
-rw-r--r--posix/glob.c671
1 files changed, 671 insertions, 0 deletions
diff --git a/posix/glob.c b/posix/glob.c
new file mode 100644
index 0000000000..243730d9ae
--- /dev/null
+++ b/posix/glob.c
@@ -0,0 +1,671 @@
+/* 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. */
+
+/* AIX requires this to be the first thing in the file. */
+#if defined (_AIX) && !defined (__GNUC__)
+ #pragma alloca
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <sys/types.h>
+
+
+/* Comment out all this code if we are using the GNU C Library, and are not
+ actually compiling the library itself. This code is part of the GNU C
+ Library, but also included in many other GNU distributions. Compiling
+ and linking in this code is a waste when using the GNU C library
+ (especially if it is a shared library). Rather than having every GNU
+ program understand `configure --with-gnu-libc' and omit the object files,
+ it is simpler to just do this in the source for each such file. */
+
+#if defined (_LIBC) || !defined (__GNU_LIBRARY__)
+
+
+#ifdef STDC_HEADERS
+#include <stddef.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#ifndef POSIX
+#ifdef _POSIX_VERSION
+#define POSIX
+#endif
+#endif
+#endif
+
+#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
+extern int errno;
+#endif
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+
+#if defined (POSIX) || defined (HAVE_DIRENT_H) || defined (__GNU_LIBRARY__)
+#include <dirent.h>
+#ifndef __GNU_LIBRARY__
+#define D_NAMLEN(d) strlen((d)->d_name)
+#else /* GNU C library. */
+#define D_NAMLEN(d) ((d)->d_namlen)
+#endif /* Not GNU C library. */
+#else /* Not POSIX or HAVE_DIRENT_H. */
+#define direct dirent
+#define D_NAMLEN(d) ((d)->d_namlen)
+#ifdef HAVE_SYS_NDIR_H
+#include <sys/ndir.h>
+#endif /* HAVE_SYS_NDIR_H */
+#ifdef HAVE_SYS_DIR_H
+#include <sys/dir.h>
+#endif /* HAVE_SYS_DIR_H */
+#ifdef HAVE_NDIR_H
+#include <ndir.h>
+#endif /* HAVE_NDIR_H */
+#endif /* POSIX or HAVE_DIRENT_H or __GNU_LIBRARY__. */
+
+#if defined (POSIX) && !defined (__GNU_LIBRARY__)
+/* Posix does not require that the d_ino field be present, and some
+ systems do not provide it. */
+#define REAL_DIR_ENTRY(dp) 1
+#else
+#define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
+#endif /* POSIX */
+
+#if (defined (STDC_HEADERS) || defined (__GNU_LIBRARY__))
+#include <stdlib.h>
+#include <string.h>
+#define ANSI_STRING
+#else /* No standard headers. */
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#define ANSI_STRING
+#else
+#include <strings.h>
+#endif
+#ifdef HAVE_MEMORY_H
+#include <memory.h>
+#endif
+
+extern char *malloc (), *realloc ();
+extern void free ();
+
+extern void qsort ();
+extern void abort (), exit ();
+
+#endif /* Standard headers. */
+
+#ifndef ANSI_STRING
+
+#ifndef bzero
+extern void bzero ();
+#endif
+#ifndef bcopy
+extern void bcopy ();
+#endif
+
+#define memcpy(d, s, n) bcopy ((s), (d), (n))
+#define strrchr rindex
+/* memset is only used for zero here, but let's be paranoid. */
+#define memset(s, better_be_zero, n) \
+ ((void) ((better_be_zero) == 0 ? (bzero((s), (n)), 0) : (abort(), 0)))
+#endif /* Not ANSI_STRING. */
+
+#ifndef HAVE_STRCOLL
+#define strcoll strcmp
+#endif
+
+
+#ifndef __GNU_LIBRARY__
+#ifdef __GNUC__
+__inline
+#endif
+static char *
+my_realloc (p, n)
+ char *p;
+ unsigned int n;
+{
+ /* These casts are the for sake of the broken Ultrix compiler,
+ which warns of illegal pointer combinations otherwise. */
+ if (p == NULL)
+ return (char *) malloc (n);
+ return (char *) realloc (p, n);
+}
+#define realloc my_realloc
+#endif
+
+
+#if !defined(__alloca) && !defined(__GNU_LIBRARY__)
+
+#ifdef __GNUC__
+#undef alloca
+#define alloca(n) __builtin_alloca (n)
+#else /* Not GCC. */
+#if defined (sparc) || defined (HAVE_ALLOCA_H)
+#include <alloca.h>
+#else /* Not sparc or HAVE_ALLOCA_H. */
+#ifndef _AIX
+extern char *alloca ();
+#endif /* Not _AIX. */
+#endif /* sparc or HAVE_ALLOCA_H. */
+#endif /* GCC. */
+
+#define __alloca alloca
+
+#endif
+
+#ifndef STDC_HEADERS
+#undef size_t
+#define size_t unsigned int
+#endif
+
+/* Some system header files erroneously define these.
+ We want our own definitions from <fnmatch.h> to take precedence. */
+#undef FNM_PATHNAME
+#undef FNM_NOESCAPE
+#undef FNM_PERIOD
+#include <fnmatch.h>
+
+/* Some system header files erroneously define these.
+ We want our own definitions from <glob.h> to take precedence. */
+#undef GLOB_ERR
+#undef GLOB_MARK
+#undef GLOB_NOSORT
+#undef GLOB_DOOFFS
+#undef GLOB_NOCHECK
+#undef GLOB_APPEND
+#undef GLOB_NOESCAPE
+#undef GLOB_PERIOD
+#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));
+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))
+ {
+ 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))
+ {
+ globfree (pglob);
+ return GLOB_NOSPACE;
+ }
+ }
+ }
+
+ if (!(flags & GLOB_NOSORT))
+ /* Sort the vector. */
+ qsort ((__ptr_t) & pglob->gl_pathv[oldcount],
+ pglob->gl_pathc - oldcount,
+ sizeof (char *), 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. */
+static int
+prefix_array (dirname, array, n)
+ const char *dirname;
+ char **array;
+ size_t n;
+{
+ 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);
+ 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;
+
+ if (!glob_pattern_p (pattern, !(flags & GLOB_NOESCAPE)))
+ {
+ stream = NULL;
+ flags |= GLOB_NOCHECK;
+ }
+ else
+ {
+ flags |= GLOB_MAGCHAR;
+
+ 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_ABEND;
+ }
+ else
+ 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 (! REAL_DIR_ENTRY (d))
+ continue;
+ name = d->d_name;
+#ifdef HAVE_D_NAMLEN
+ len = d->d_namlen;
+#else
+ len = 0;
+#endif
+ }
+
+ if (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);
+ if (flags & GLOB_MARK)
+ new->name[len++] = '/';
+ new->name[len] = '\0';
+ new->next = names;
+ names = new;
+ ++nfound;
+ }
+ }
+ }
+
+ 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);
+ if (flags & GLOB_MARK)
+ names->name[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;
+
+ if (stream != NULL)
+ {
+ 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;
+}
+
+#endif /* _LIBC or not __GNU_LIBRARY__. */