lib: Import glob.c from glibc 2.26

The Android libc implementation (bionic) doesn't provide the glob()
function. To enable compilation of the UVC gadget library for Android,
import the glibc glob() implementation.

The glob.c and glob.h files are imported unmodified to ease copyright
management, even if they don't compile as-is. Compilation will be fixed
separately.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 1729 insertions, 0 deletions

diff --git a/lib/compat/glob.c b/lib/compat/glob.c
new file mode 100644
index 0000000..c653809
--- /dev/null
+++ b/lib/compat/glob.c
@@ -0,0 +1,1729 @@
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef	HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <glob.h>
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/* Outcomment the following line for production quality code.  */
+/* #define NDEBUG 1 */
+#include <assert.h>
+
+#include <stdio.h>		/* Needed on stupid SunOS for assert.  */
+
+#if !defined _LIBC || !defined GLOB_ONLY_P
+#if defined HAVE_UNISTD_H || defined _LIBC
+# include <unistd.h>
+# ifndef POSIX
+#  ifdef _POSIX_VERSION
+#   define POSIX
+#  endif
+# endif
+#endif
+
+#include <pwd.h>
+
+#if defined HAVE_STDINT_H || defined _LIBC
+# include <stdint.h>
+#elif !defined UINTPTR_MAX
+# define UINTPTR_MAX (~((size_t) 0))
+#endif
+
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(val) errno = (val)
+#endif
+
+#if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
+# include <dirent.h>
+#else
+# define dirent direct
+# ifdef HAVE_SYS_NDIR_H
+#  include <sys/ndir.h>
+# endif
+# ifdef HAVE_SYS_DIR_H
+#  include <sys/dir.h>
+# endif
+# ifdef HAVE_NDIR_H
+#  include <ndir.h>
+# endif
+# ifdef HAVE_VMSDIR_H
+#  include "vmsdir.h"
+# endif /* HAVE_VMSDIR_H */
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <alloca.h>
+
+#ifdef _LIBC
+# undef strdup
+# define strdup(str) __strdup (str)
+# define sysconf(id) __sysconf (id)
+# define closedir(dir) __closedir (dir)
+# define opendir(name) __opendir (name)
+# define readdir(str) __readdir64 (str)
+# define getpwnam_r(name, bufp, buf, len, res) \
+   __getpwnam_r (name, bufp, buf, len, res)
+# ifndef __stat64
+#  define __stat64(fname, buf) __xstat64 (_STAT_VER, fname, buf)
+# endif
+# define struct_stat64		struct stat64
+#else /* !_LIBC */
+# include "getlogin_r.h"
+# include "mempcpy.h"
+# include "stat-macros.h"
+# include "strdup.h"
+# define __stat64(fname, buf)	stat (fname, buf)
+# define struct_stat64		struct stat
+# define __stat(fname, buf)	stat (fname, buf)
+# define __alloca		alloca
+# define __readdir		readdir
+# define __readdir64		readdir64
+# define __glob_pattern_p	glob_pattern_p
+#endif /* _LIBC */
+
+#include <fnmatch.h>
+
+#ifdef _SC_GETPW_R_SIZE_MAX
+# define GETPW_R_SIZE_MAX()	sysconf (_SC_GETPW_R_SIZE_MAX)
+#else
+# define GETPW_R_SIZE_MAX()	(-1)
+#endif
+#ifdef _SC_LOGIN_NAME_MAX
+# define GET_LOGIN_NAME_MAX()	sysconf (_SC_LOGIN_NAME_MAX)
+#else
+# define GET_LOGIN_NAME_MAX()	(-1)
+#endif
+
+static const char *next_brace_sub (const char *begin, int flags) __THROWNL;
+
+/* A representation of a directory entry which does not depend on the
+   layout of struct dirent, or the size of ino_t.  */
+struct readdir_result
+{
+  const char *name;
+# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
+  uint8_t type;
+# endif
+  bool skip_entry;
+};
+
+# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
+/* Initializer based on the d_type member of struct dirent.  */
+#  define D_TYPE_TO_RESULT(source) (source)->d_type,
+
+/* True if the directory entry D might be a symbolic link.  */
+static bool
+readdir_result_might_be_symlink (struct readdir_result d)
+{
+  return d.type == DT_UNKNOWN || d.type == DT_LNK;
+}
+
+/* True if the directory entry D might be a directory.  */
+static bool
+readdir_result_might_be_dir (struct readdir_result d)
+{
+  return d.type == DT_DIR || readdir_result_might_be_symlink (d);
+}
+# else /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
+#  define D_TYPE_TO_RESULT(source)
+
+/* If we do not have type information, symbolic links and directories
+   are always a possibility.  */
+
+static bool
+readdir_result_might_be_symlink (struct readdir_result d)
+{
+  return true;
+}
+
+static bool
+readdir_result_might_be_dir (struct readdir_result d)
+{
+  return true;
+}
+
+# endif /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
+
+# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
+/* Initializer for skip_entry.  POSIX does not require that the d_ino
+   field be present, and some systems do not provide it. */
+#  define D_INO_TO_RESULT(source) false,
+# else
+#  define D_INO_TO_RESULT(source) (source)->d_ino == 0,
+# endif
+
+/* Construct an initializer for a struct readdir_result object from a
+   struct dirent *.  No copy of the name is made.  */
+#define READDIR_RESULT_INITIALIZER(source) \
+  {					   \
+    source->d_name,			   \
+    D_TYPE_TO_RESULT (source)		   \
+    D_INO_TO_RESULT (source)		   \
+  }
+
+#endif /* !defined _LIBC || !defined GLOB_ONLY_P */
+
+/* Call gl_readdir on STREAM.  This macro can be overridden to reduce
+   type safety if an old interface version needs to be supported.  */
+#ifndef GL_READDIR
+# define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream))
+#endif
+
+/* Extract name and type from directory entry.  No copy of the name is
+   made.  If SOURCE is NULL, result name is NULL.  Keep in sync with
+   convert_dirent64 below.  */
+static struct readdir_result
+convert_dirent (const struct dirent *source)
+{
+  if (source == NULL)
+    {
+      struct readdir_result result = { NULL, };
+      return result;
+    }
+  struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
+  return result;
+}
+
+#ifndef COMPILE_GLOB64
+/* Like convert_dirent, but works on struct dirent64 instead.  Keep in
+   sync with convert_dirent above.  */
+static struct readdir_result
+convert_dirent64 (const struct dirent64 *source)
+{
+  if (source == NULL)
+    {
+      struct readdir_result result = { NULL, };
+      return result;
+    }
+  struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
+  return result;
+}
+#endif
+
+
+#ifndef attribute_hidden
+# define attribute_hidden
+#endif
+
+static int glob_in_dir (const char *pattern, const char *directory,
+			int flags, int (*errfunc) (const char *, int),
+			glob_t *pglob, size_t alloca_used);
+extern int __glob_pattern_type (const char *pattern, int quote)
+    attribute_hidden;
+
+#if !defined _LIBC || !defined GLOB_ONLY_P
+static int prefix_array (const char *prefix, char **array, size_t n) __THROWNL;
+static int collated_compare (const void *, const void *) __THROWNL;
+
+
+/* Find the end of the sub-pattern in a brace expression.  */
+static const char *
+next_brace_sub (const char *cp, int flags)
+{
+  size_t depth = 0;
+  while (*cp != '\0')
+    if ((flags & GLOB_NOESCAPE) == 0 && *cp == '\\')
+      {
+	if (*++cp == '\0')
+	  break;
+	++cp;
+      }
+    else
+      {
+	if ((*cp == '}' && depth-- == 0) || (*cp == ',' && depth == 0))
+	  break;
+
+	if (*cp++ == '{')
+	  depth++;
+      }
+
+  return *cp != '\0' ? cp : NULL;
+}
+
+#endif /* !defined _LIBC || !defined GLOB_ONLY_P */
+
+/* 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_ABORTED; if it returns zero, the error is ignored.
+   If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
+   Otherwise, `glob' returns zero.  */
+int
+#ifdef GLOB_ATTRIBUTE
+GLOB_ATTRIBUTE
+#endif
+glob (const char *pattern, int flags, int (*errfunc) (const char *, int),
+      glob_t *pglob)
+{
+  const char *filename;
+  char *dirname = NULL;
+  size_t dirlen;
+  int status;
+  size_t oldcount;
+  int meta;
+  int dirname_modified;
+  int malloc_dirname = 0;
+  glob_t dirs;
+  int retval = 0;
+#ifdef _LIBC
+  size_t alloca_used = 0;
+#endif
+
+  if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  /* POSIX requires all slashes to be matched.  This means that with
+     a trailing slash we must match only directories.  */
+  if (pattern[0] && pattern[strlen (pattern) - 1] == '/')
+    flags |= GLOB_ONLYDIR;
+
+  if (!(flags & GLOB_DOOFFS))
+    /* Have to do this so `globfree' knows where to start freeing.  It
+       also makes all the code that uses gl_offs simpler. */
+    pglob->gl_offs = 0;
+
+  if (!(flags & GLOB_APPEND))
+    {
+      pglob->gl_pathc = 0;
+      if (!(flags & GLOB_DOOFFS))
+	pglob->gl_pathv = NULL;
+      else
+	{
+	  size_t i;
+
+	  if (pglob->gl_offs >= ~((size_t) 0) / sizeof (char *))
+	    return GLOB_NOSPACE;
+
+	  pglob->gl_pathv = (char **) malloc ((pglob->gl_offs + 1)
+					      * sizeof (char *));
+	  if (pglob->gl_pathv == NULL)
+	    return GLOB_NOSPACE;
+
+	  for (i = 0; i <= pglob->gl_offs; ++i)
+	    pglob->gl_pathv[i] = NULL;
+	}
+    }
+
+  if (flags & GLOB_BRACE)
+    {
+      const char *begin;
+
+      if (flags & GLOB_NOESCAPE)
+	begin = strchr (pattern, '{');
+      else
+	{
+	  begin = pattern;
+	  while (1)
+	    {
+	      if (*begin == '\0')
+		{
+		  begin = NULL;
+		  break;
+		}
+
+	      if (*begin == '\\' && begin[1] != '\0')
+		++begin;
+	      else if (*begin == '{')
+		break;
+
+	      ++begin;
+	    }
+	}
+
+      if (begin != NULL)
+	{
+	  /* Allocate working buffer large enough for our work.  Note that
+	    we have at least an opening and closing brace.  */
+	  size_t firstc;
+	  char *alt_start;
+	  const char *p;
+	  const char *next;
+	  const char *rest;
+	  size_t rest_len;
+	  char *onealt;
+	  size_t pattern_len = strlen (pattern) - 1;
+#ifdef _LIBC
+	  int alloca_onealt = __libc_use_alloca (alloca_used + pattern_len);
+	  if (alloca_onealt)
+	    onealt = alloca_account (pattern_len, alloca_used);
+	  else
+#endif
+	    {
+	      onealt = (char *) malloc (pattern_len);
+	      if (onealt == NULL)
+		return GLOB_NOSPACE;
+	    }
+
+	  /* We know the prefix for all sub-patterns.  */
+	  alt_start = mempcpy (onealt, pattern, begin - pattern);
+
+	  /* Find the first sub-pattern and at the same time find the
+	     rest after the closing brace.  */
+	  next = next_brace_sub (begin + 1, flags);
+	  if (next == NULL)
+	    {
+	      /* It is an illegal expression.  */
+	    illegal_brace:
+#ifdef _LIBC
+	      if (__glibc_unlikely (!alloca_onealt))
+#endif
+		free (onealt);
+	      flags &= ~GLOB_BRACE;
+	      goto no_brace;
+	    }
+
+	  /* Now find the end of the whole brace expression.  */
+	  rest = next;
+	  while (*rest != '}')
+	    {
+	      rest = next_brace_sub (rest + 1, flags);
+	      if (rest == NULL)
+		/* It is an illegal expression.  */
+		goto illegal_brace;
+	    }
+	  /* Please note that we now can be sure the brace expression
+	     is well-formed.  */
+	  rest_len = strlen (++rest) + 1;
+
+	  /* We have a brace expression.  BEGIN points to the opening {,
+	     NEXT points past the terminator of the first element, and END
+	     points past the final }.  We will accumulate result names from
+	     recursive runs for each brace alternative in the buffer using
+	     GLOB_APPEND.  */
+	  firstc = pglob->gl_pathc;
+
+	  p = begin + 1;
+	  while (1)
+	    {
+	      int result;
+
+	      /* Construct the new glob expression.  */
+	      mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len);
+
+	      result = glob (onealt,
+			     ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC))
+			      | GLOB_APPEND), errfunc, pglob);
+
+	      /* If we got an error, return it.  */
+	      if (result && result != GLOB_NOMATCH)
+		{
+#ifdef _LIBC
+		  if (__glibc_unlikely (!alloca_onealt))
+#endif
+		    free (onealt);
+		  if (!(flags & GLOB_APPEND))
+		    {
+		      globfree (pglob);
+		      pglob->gl_pathc = 0;
+		    }
+		  return result;
+		}
+
+	      if (*next == '}')
+		/* We saw the last entry.  */
+		break;
+
+	      p = next + 1;
+	      next = next_brace_sub (p, flags);
+	      assert (next != NULL);
+	    }
+
+#ifdef _LIBC
+	  if (__glibc_unlikely (!alloca_onealt))
+#endif
+	    free (onealt);
+
+	  if (pglob->gl_pathc != firstc)
+	    /* We found some entries.  */
+	    return 0;
+	  else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
+	    return GLOB_NOMATCH;
+	}
+    }
+
+ no_brace:
+  oldcount = pglob->gl_pathc + pglob->gl_offs;
+
+  /* Find the filename.  */
+  filename = strrchr (pattern, '/');
+#if defined __MSDOS__ || defined WINDOWS32
+  /* The case of "d:pattern".  Since `:' is not allowed in
+     file names, we can safely assume that wherever it
+     happens in pattern, it signals the filename part.  This
+     is so we could some day support patterns like "[a-z]:foo".  */
+  if (filename == NULL)
+    filename = strchr (pattern, ':');
+#endif /* __MSDOS__ || WINDOWS32 */
+  dirname_modified = 0;
+  if (filename == NULL)
+    {
+      /* This can mean two things: a simple name or "~name".  The latter
+	 case is nothing but a notation for a directory.  */
+      if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~')
+	{
+	  dirname = (char *) pattern;
+	  dirlen = strlen (pattern);
+
+	  /* Set FILENAME to NULL as a special flag.  This is ugly but
+	     other solutions would require much more code.  We test for
+	     this special case below.  */
+	  filename = NULL;
+	}
+      else
+	{
+	  if (__glibc_unlikely (pattern[0] == '\0'))
+	    {
+	      dirs.gl_pathv = NULL;
+	      goto no_matches;
+	    }
+
+	  filename = pattern;
+#ifdef _AMIGA
+	  dirname = (char *) "";
+#else
+	  dirname = (char *) ".";
+#endif
+	  dirlen = 0;
+	}
+    }
+  else if (filename == pattern
+	   || (filename == pattern + 1 && pattern[0] == '\\'
+	       && (flags & GLOB_NOESCAPE) == 0))
+    {
+      /* "/pattern" or "\\/pattern".  */
+      dirname = (char *) "/";
+      dirlen = 1;
+      ++filename;
+    }
+  else
+    {
+      char *newp;
+      dirlen = filename - pattern;
+#if defined __MSDOS__ || defined WINDOWS32
+      if (*filename == ':'
+	  || (filename > pattern + 1 && filename[-1] == ':'))
+	{
+	  char *drive_spec;
+
+	  ++dirlen;
+	  drive_spec = (char *) __alloca (dirlen + 1);
+	  *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0';
+	  /* For now, disallow wildcards in the drive spec, to
+	     prevent infinite recursion in glob.  */
+	  if (__glob_pattern_p (drive_spec, !(flags & GLOB_NOESCAPE)))
+	    return GLOB_NOMATCH;
+	  /* If this is "d:pattern", we need to copy `:' to DIRNAME
+	     as well.  If it's "d:/pattern", don't remove the slash
+	     from "d:/", since "d:" and "d:/" are not the same.*/
+	}
+#endif
+#ifdef _LIBC
+      if (__libc_use_alloca (alloca_used + dirlen + 1))
+	newp = alloca_account (dirlen + 1, alloca_used);
+      else
+#endif
+	{
+	  newp = malloc (dirlen + 1);
+	  if (newp == NULL)
+	    return GLOB_NOSPACE;
+	  malloc_dirname = 1;
+	}
+      *((char *) mempcpy (newp, pattern, dirlen)) = '\0';
+      dirname = newp;
+      ++filename;
+
+      if (filename[0] == '\0'
+#if defined __MSDOS__ || defined WINDOWS32
+	  && dirname[dirlen - 1] != ':'
+	  && (dirlen < 3 || dirname[dirlen - 2] != ':'
+	      || dirname[dirlen - 1] != '/')
+#endif
+	  && dirlen > 1)
+	/* "pattern/".  Expand "pattern", appending slashes.  */
+	{
+	  int orig_flags = flags;
+	  if (!(flags & GLOB_NOESCAPE) && dirname[dirlen - 1] == '\\')
+	    {
+	      /* "pattern\\/".  Remove the final backslash if it hasn't
+		 been quoted.  */
+	      char *p = (char *) &dirname[dirlen - 1];
+
+	      while (p > dirname && p[-1] == '\\') --p;
+	      if ((&dirname[dirlen] - p) & 1)
+		{
+		  *(char *) &dirname[--dirlen] = '\0';
+		  flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC);
+		}
+	    }
+	  int val = glob (dirname, flags | GLOB_MARK, errfunc, pglob);
+	  if (val == 0)
+	    pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK)
+			       | (flags & GLOB_MARK));
+	  else if (val == GLOB_NOMATCH && flags != orig_flags)
+	    {
+	      /* Make sure globfree (&dirs); is a nop.  */
+	      dirs.gl_pathv = NULL;
+	      flags = orig_flags;
+	      oldcount = pglob->gl_pathc + pglob->gl_offs;
+	      goto no_matches;
+	    }
+	  retval = val;
+	  goto out;
+	}
+    }
+
+#ifndef VMS
+  if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~')
+    {
+      if (dirname[1] == '\0' || dirname[1] == '/'
+	  || (!(flags & GLOB_NOESCAPE) && dirname[1] == '\\'
+	      && (dirname[2] == '\0' || dirname[2] == '/')))
+	{
+	  /* Look up home directory.  */
+	  char *home_dir = getenv ("HOME");
+	  int malloc_home_dir = 0;
+# ifdef _AMIGA
+	  if (home_dir == NULL || home_dir[0] == '\0')
+	    home_dir = "SYS:";
+# else
+#  ifdef WINDOWS32
+	  if (home_dir == NULL || home_dir[0] == '\0')
+	    home_dir = "c:/users/default"; /* poor default */
+#  else
+	  if (home_dir == NULL || home_dir[0] == '\0')
+	    {
+	      int success;
+	      char *name;
+	      size_t buflen = GET_LOGIN_NAME_MAX () + 1;
+
+	      if (buflen == 0)
+		/* `sysconf' does not support _SC_LOGIN_NAME_MAX.  Try
+		   a moderate value.  */
+		buflen = 20;
+	      name = alloca_account (buflen, alloca_used);
+
+	      success = __getlogin_r (name, buflen) == 0;
+	      if (success)
+		{
+		  struct passwd *p;
+#   if defined HAVE_GETPWNAM_R || defined _LIBC
+		  long int pwbuflen = GETPW_R_SIZE_MAX ();
+		  char *pwtmpbuf;
+		  struct passwd pwbuf;
+		  int malloc_pwtmpbuf = 0;
+		  int save = errno;
+
+#    ifndef _LIBC
+		  if (pwbuflen == -1)
+		    /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX.
+		       Try a moderate value.  */
+		    pwbuflen = 1024;
+#    endif
+		  if (__libc_use_alloca (alloca_used + pwbuflen))
+		    pwtmpbuf = alloca_account (pwbuflen, alloca_used);
+		  else
+		    {
+		      pwtmpbuf = malloc (pwbuflen);
+		      if (pwtmpbuf == NULL)
+			{
+			  retval = GLOB_NOSPACE;
+			  goto out;
+			}
+		      malloc_pwtmpbuf = 1;
+		    }
+
+		  while (getpwnam_r (name, &pwbuf, pwtmpbuf, pwbuflen, &p)
+			 != 0)
+		    {
+		      if (errno != ERANGE)
+			{
+			  p = NULL;
+			  break;
+			}
+
+		      if (!malloc_pwtmpbuf
+			  && __libc_use_alloca (alloca_used
+						+ 2 * pwbuflen))
+			pwtmpbuf = extend_alloca_account (pwtmpbuf, pwbuflen,
+							  2 * pwbuflen,
+							  alloca_used);
+		      else
+			{
+			  char *newp = realloc (malloc_pwtmpbuf
+						? pwtmpbuf : NULL,
+						2 * pwbuflen);
+			  if (newp == NULL)
+			    {
+			      if (__glibc_unlikely (malloc_pwtmpbuf))
+				free (pwtmpbuf);
+			      retval = GLOB_NOSPACE;
+			      goto out;
+			    }
+			  pwtmpbuf = newp;
+			  pwbuflen = 2 * pwbuflen;
+			  malloc_pwtmpbuf = 1;
+			}
+		      __set_errno (save);
+		    }
+#   else
+		  p = getpwnam (name);
+#   endif
+		  if (p != NULL)
+		    {
+		      if (!malloc_pwtmpbuf)
+			home_dir = p->pw_dir;
+		      else
+			{
+			  size_t home_dir_len = strlen (p->pw_dir) + 1;
+			  if (__libc_use_alloca (alloca_used + home_dir_len))
+			    home_dir = alloca_account (home_dir_len,
+						       alloca_used);
+			  else
+			    {
+			      home_dir = malloc (home_dir_len);
+			      if (home_dir == NULL)
+				{
+				  free (pwtmpbuf);
+				  retval = GLOB_NOSPACE;
+				  goto out;
+				}
+			      malloc_home_dir = 1;
+			    }
+			  memcpy (home_dir, p->pw_dir, home_dir_len);
+
+			  free (pwtmpbuf);
+			}
+		    }
+		}
+	    }
+	  if (home_dir == NULL || home_dir[0] == '\0')
+	    {
+	      if (flags & GLOB_TILDE_CHECK)
+		{
+		  if (__glibc_unlikely (malloc_home_dir))
+		    free (home_dir);
+		  retval = GLOB_NOMATCH;
+		  goto out;
+		}
+	      else
+		home_dir = (char *) "~"; /* No luck.  */
+	    }
+#  endif /* WINDOWS32 */
+# endif
+	  /* Now construct the full directory.  */
+	  if (dirname[1] == '\0')
+	    {
+	      if (__glibc_unlikely (malloc_dirname))
+		free (dirname);
+
+	      dirname = home_dir;
+	      dirlen = strlen (dirname);
+	      malloc_dirname = malloc_home_dir;
+	    }
+	  else
+	    {
+	      char *newp;
+	      size_t home_len = strlen (home_dir);
+	      int use_alloca = __libc_use_alloca (alloca_used
+						  + home_len + dirlen);
+	      if (use_alloca)
+		newp = alloca_account (home_len + dirlen, alloca_used);
+	      else
+		{
+		  newp = malloc (home_len + dirlen);
+		  if (newp == NULL)
+		    {
+		      if (__glibc_unlikely (malloc_home_dir))
+			free (home_dir);
+		      retval = GLOB_NOSPACE;
+		      goto out;
+		    }
+		}
+
+	      mempcpy (mempcpy (newp, home_dir, home_len),
+		       &dirname[1], dirlen);
+
+	      if (__glibc_unlikely (malloc_dirname))
+		free (dirname);
+
+	      dirname = newp;
+	      dirlen += home_len - 1;
+	      malloc_dirname = !use_alloca;
+	    }
+	  dirname_modified = 1;
+	}
+# if !defined _AMIGA && !defined WINDOWS32
+      else
+	{
+	  char *end_name = strchr (dirname, '/');
+	  char *user_name;
+	  int malloc_user_name = 0;
+	  char *unescape = NULL;
+
+	  if (!(flags & GLOB_NOESCAPE))
+	    {
+	      if (end_name == NULL)
+		{
+		  unescape = strchr (dirname, '\\');
+		  if (unescape)
+		    end_name = strchr (unescape, '\0');
+		}
+	      else
+		unescape = memchr (dirname, '\\', end_name - dirname);
+	    }
+	  if (end_name == NULL)
+	    user_name = dirname + 1;
+	  else
+	    {
+	      char *newp;
+	      if (__libc_use_alloca (alloca_used + (end_name - dirname)))
+		newp = alloca_account (end_name - dirname, alloca_used);
+	      else
+		{
+		  newp = malloc (end_name - dirname);
+		  if (newp == NULL)
+		    {
+		      retval = GLOB_NOSPACE;
+		      goto out;
+		    }
+		  malloc_user_name = 1;
+		}
+	      if (unescape != NULL)
+		{
+		  char *p = mempcpy (newp, dirname + 1,
+				     unescape - dirname - 1);
+		  char *q = unescape;
+		  while (*q != '\0')
+		    {
+		      if (*q == '\\')
+			{
+			  if (q[1] == '\0')
+			    {
+			      /* "~fo\\o\\" unescape to user_name "foo\\",
+				 but "~fo\\o\\/" unescape to user_name
+				 "foo".  */
+			      if (filename == NULL)
+				*p++ = '\\';
+			      break;
+			    }
+			  ++q;
+			}
+		      *p++ = *q++;
+		    }
+		  *p = '\0';
+		}
+	      else
+		*((char *) mempcpy (newp, dirname + 1, end_name - dirname))
+		  = '\0';
+	      user_name = newp;
+	    }
+
+	  /* Look up specific user's home directory.  */
+	  {
+	    struct passwd *p;
+#  if defined HAVE_GETPWNAM_R || defined _LIBC
+	    long int buflen = GETPW_R_SIZE_MAX ();
+	    char *pwtmpbuf;
+	    int malloc_pwtmpbuf = 0;
+	    struct passwd pwbuf;
+	    int save = errno;
+
+#   ifndef _LIBC
+	    if (buflen == -1)
+	      /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX.  Try a
+		 moderate value.  */
+	      buflen = 1024;
+#   endif
+	    if (__libc_use_alloca (alloca_used + buflen))
+	      pwtmpbuf = alloca_account (buflen, alloca_used);
+	    else
+	      {
+		pwtmpbuf = malloc (buflen);
+		if (pwtmpbuf == NULL)
+		  {
+		  nomem_getpw:
+		    if (__glibc_unlikely (malloc_user_name))
+		      free (user_name);
+		    retval = GLOB_NOSPACE;
+		    goto out;
+		  }
+		malloc_pwtmpbuf = 1;
+	      }
+
+	    while (getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) != 0)
+	      {
+		if (errno != ERANGE)
+		  {
+		    p = NULL;
+		    break;
+		  }
+		if (!malloc_pwtmpbuf
+		    && __libc_use_alloca (alloca_used + 2 * buflen))
+		  pwtmpbuf = extend_alloca_account (pwtmpbuf, buflen,
+						    2 * buflen, alloca_used);
+		else
+		  {
+		    char *newp = realloc (malloc_pwtmpbuf ? pwtmpbuf : NULL,
+					  2 * buflen);
+		    if (newp == NULL)
+		      {
+			if (__glibc_unlikely (malloc_pwtmpbuf))
+			  free (pwtmpbuf);
+			goto nomem_getpw;
+		      }
+		    pwtmpbuf = newp;
+		    malloc_pwtmpbuf = 1;
+		  }
+		__set_errno (save);
+	      }
+#  else
+	    p = getpwnam (user_name);
+#  endif
+
+	    if (__glibc_unlikely (malloc_user_name))
+	      free (user_name);
+
+	    /* If we found a home directory use this.  */
+	    if (p != NULL)
+	      {
+		size_t home_len = strlen (p->pw_dir);
+		size_t rest_len = end_name == NULL ? 0 : strlen (end_name);
+
+		if (__glibc_unlikely (malloc_dirname))
+		  free (dirname);
+		malloc_dirname = 0;
+
+		if (__libc_use_alloca (alloca_used + home_len + rest_len + 1))
+		  dirname = alloca_account (home_len + rest_len + 1,
+					    alloca_used);
+		else
+		  {
+		    dirname = malloc (home_len + rest_len + 1);
+		    if (dirname == NULL)
+		      {
+			if (__glibc_unlikely (malloc_pwtmpbuf))
+			  free (pwtmpbuf);
+			retval = GLOB_NOSPACE;
+			goto out;
+		      }
+		    malloc_dirname = 1;
+		  }
+		*((char *) mempcpy (mempcpy (dirname, p->pw_dir, home_len),
+				    end_name, rest_len)) = '\0';
+
+		dirlen = home_len + rest_len;
+		dirname_modified = 1;
+
+		if (__glibc_unlikely (malloc_pwtmpbuf))
+		  free (pwtmpbuf);
+	      }
+	    else
+	      {
+		if (__glibc_unlikely (malloc_pwtmpbuf))
+		  free (pwtmpbuf);
+
+		if (flags & GLOB_TILDE_CHECK)
+		  /* We have to regard it as an error if we cannot find the
+		     home directory.  */
+		  return GLOB_NOMATCH;
+	      }
+	  }
+	}
+# endif	/* Not Amiga && not WINDOWS32.  */
+    }
+#endif	/* Not VMS.  */
+
+  /* Now test whether we looked for "~" or "~NAME".  In this case we
+     can give the answer now.  */
+  if (filename == NULL)
+    {
+      struct stat st;
+      struct_stat64 st64;
+
+      /* Return the directory if we don't check for error or if it exists.  */
+      if ((flags & GLOB_NOCHECK)
+	  || (((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
+	       ? ((*pglob->gl_stat) (dirname, &st) == 0
+		  && S_ISDIR (st.st_mode))
+	       : (__stat64 (dirname, &st64) == 0 && S_ISDIR (st64.st_mode)))))
+	{
+	  size_t newcount = pglob->gl_pathc + pglob->gl_offs;
+	  char **new_gl_pathv;
+
+	  if (newcount > UINTPTR_MAX - (1 + 1)
+	      || newcount + 1 + 1 > ~((size_t) 0) / sizeof (char *))
+	    {
+	    nospace:
+	      free (pglob->gl_pathv);
+	      pglob->gl_pathv = NULL;
+	      pglob->gl_pathc = 0;
+	      return GLOB_NOSPACE;
+	    }
+
+	  new_gl_pathv
+	    = (char **) realloc (pglob->gl_pathv,
+				 (newcount + 1 + 1) * sizeof (char *));
+	  if (new_gl_pathv == NULL)
+	    goto nospace;
+	  pglob->gl_pathv = new_gl_pathv;
+
+	  if (flags & GLOB_MARK)
+	    {
+	      char *p;
+	      pglob->gl_pathv[newcount] = malloc (dirlen + 2);
+	      if (pglob->gl_pathv[newcount] == NULL)
+		goto nospace;
+	      p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen);
+	      p[0] = '/';
+	      p[1] = '\0';
+	    }
+	  else
+	    {
+	      pglob->gl_pathv[newcount] = strdup (dirname);
+	      if (pglob->gl_pathv[newcount] == NULL)
+		goto nospace;
+	    }
+	  pglob->gl_pathv[++newcount] = NULL;
+	  ++pglob->gl_pathc;
+	  pglob->gl_flags = flags;
+
+	  return 0;
+	}
+
+      /* Not found.  */
+      return GLOB_NOMATCH;
+    }
+
+  meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE));
+  /* meta is 1 if correct glob pattern containing metacharacters.
+     If meta has bit (1 << 2) set, it means there was an unterminated
+     [ which we handle the same, using fnmatch.  Broken unterminated
+     pattern bracket expressions ought to be rare enough that it is
+     not worth special casing them, fnmatch will do the right thing.  */
+  if (meta & 5)
+    {
+      /* The directory name contains metacharacters, so we
+	 have to glob for the directory, and then glob for
+	 the pattern in each directory found.  */
+      size_t i;
+
+      if (!(flags & GLOB_NOESCAPE) && dirlen > 0 && dirname[dirlen - 1] == '\\')
+	{
+	  /* "foo\\/bar".  Remove the final backslash from dirname
+	     if it has not been quoted.  */
+	  char *p = (char *) &dirname[dirlen - 1];
+
+	  while (p > dirname && p[-1] == '\\') --p;
+	  if ((&dirname[dirlen] - p) & 1)
+	    *(char *) &dirname[--dirlen] = '\0';
+	}
+
+      if (__glibc_unlikely ((flags & GLOB_ALTDIRFUNC) != 0))
+	{
+	  /* Use the alternative access functions also in the recursive
+	     call.  */
+	  dirs.gl_opendir = pglob->gl_opendir;
+	  dirs.gl_readdir = pglob->gl_readdir;
+	  dirs.gl_closedir = pglob->gl_closedir;
+	  dirs.gl_stat = pglob->gl_stat;
+	  dirs.gl_lstat = pglob->gl_lstat;
+	}
+
+      status = glob (dirname,
+		     ((flags & (GLOB_ERR | GLOB_NOESCAPE
+				| GLOB_ALTDIRFUNC))
+		      | GLOB_NOSORT | GLOB_ONLYDIR),
+		     errfunc, &dirs);
+      if (status != 0)
+	{
+	  if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH)
+	    return status;
+	  goto no_matches;
+	}
+
+      /* 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)
+	{
+	  size_t old_pathc;
+
+#ifdef	SHELL
+	  {
+	    /* Make globbing interruptible in the bash shell. */
+	    extern int interrupt_state;
+
+	    if (interrupt_state)
+	      {
+		globfree (&dirs);
+		return GLOB_ABORTED;
+	      }
+	  }
+#endif /* SHELL.  */
+
+	  old_pathc = pglob->gl_pathc;
+	  status = glob_in_dir (filename, dirs.gl_pathv[i],
+				((flags | GLOB_APPEND)
+				 & ~(GLOB_NOCHECK | GLOB_NOMAGIC)),
+				errfunc, pglob, alloca_used);
+	  if (status == GLOB_NOMATCH)
+	    /* No matches in this directory.  Try the next.  */
+	    continue;
+
+	  if (status != 0)
+	    {
+	      globfree (&dirs);
+	      globfree (pglob);
+	      pglob->gl_pathc = 0;
+	      return status;
+	    }
+
+	  /* Stick the directory on the front of each name.  */
+	  if (prefix_array (dirs.gl_pathv[i],
+			    &pglob->gl_pathv[old_pathc + pglob->gl_offs],
+			    pglob->gl_pathc - old_pathc))
+	    {
+	      globfree (&dirs);
+	      globfree (pglob);
+	      pglob->gl_pathc = 0;
+	      return GLOB_NOSPACE;
+	    }
+	}
+
+      flags |= GLOB_MAGCHAR;
+
+      /* We have ignored the GLOB_NOCHECK flag in the `glob_in_dir' calls.
+	 But if we have not found any matching entry and the GLOB_NOCHECK
+	 flag was set we must return the input pattern itself.  */
+      if (pglob->gl_pathc + pglob->gl_offs == oldcount)
+	{
+	no_matches:
+	  /* No matches.  */
+	  if (flags & GLOB_NOCHECK)
+	    {
+	      size_t newcount = pglob->gl_pathc + pglob->gl_offs;
+	      char **new_gl_pathv;
+
+	      if (newcount > UINTPTR_MAX - 2
+		  || newcount + 2 > ~((size_t) 0) / sizeof (char *))
+		{
+		nospace2:
+		  globfree (&dirs);
+		  return GLOB_NOSPACE;
+		}
+
+	      new_gl_pathv = (char **) realloc (pglob->gl_pathv,
+						(newcount + 2)
+						* sizeof (char *));
+	      if (new_gl_pathv == NULL)
+		goto nospace2;
+	      pglob->gl_pathv = new_gl_pathv;
+
+	      pglob->gl_pathv[newcount] = __strdup (pattern);
+	      if (pglob->gl_pathv[newcount] == NULL)
+		{
+		  globfree (&dirs);
+		  globfree (pglob);
+		  pglob->gl_pathc = 0;
+		  return GLOB_NOSPACE;
+		}
+
+	      ++pglob->gl_pathc;
+	      ++newcount;
+
+	      pglob->gl_pathv[newcount] = NULL;
+	      pglob->gl_flags = flags;
+	    }
+	  else
+	    {
+	      globfree (&dirs);
+	      return GLOB_NOMATCH;
+	    }
+	}
+
+      globfree (&dirs);
+    }
+  else
+    {
+      size_t old_pathc = pglob->gl_pathc;
+      int orig_flags = flags;
+
+      if (meta & 2)
+	{
+	  char *p = strchr (dirname, '\\'), *q;
+	  /* We need to unescape the dirname string.  It is certainly
+	     allocated by alloca, as otherwise filename would be NULL
+	     or dirname wouldn't contain backslashes.  */
+	  q = p;
+	  do
+	    {
+	      if (*p == '\\')
+		{
+		  *q = *++p;
+		  --dirlen;
+		}
+	      else
+		*q = *p;
+	      ++q;
+	    }
+	  while (*p++ != '\0');
+	  dirname_modified = 1;
+	}
+      if (dirname_modified)
+	flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC);
+      status = glob_in_dir (filename, dirname, flags, errfunc, pglob,
+			    alloca_used);
+      if (status != 0)
+	{
+	  if (status == GLOB_NOMATCH && flags != orig_flags
+	      && pglob->gl_pathc + pglob->gl_offs == oldcount)
+	    {
+	      /* Make sure globfree (&dirs); is a nop.  */
+	      dirs.gl_pathv = NULL;
+	      flags = orig_flags;
+	      goto no_matches;
+	    }
+	  return status;
+	}
+
+      if (dirlen > 0)
+	{
+	  /* Stick the directory on the front of each name.  */
+	  if (prefix_array (dirname,
+			    &pglob->gl_pathv[old_pathc + pglob->gl_offs],
+			    pglob->gl_pathc - old_pathc))
+	    {
+	      globfree (pglob);
+	      pglob->gl_pathc = 0;
+	      return GLOB_NOSPACE;
+	    }
+	}
+    }
+
+  if (flags & GLOB_MARK)
+    {
+      /* Append slashes to directory names.  */
+      size_t i;
+      struct stat st;
+      struct_stat64 st64;
+
+      for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i)
+	if ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+	     ? ((*pglob->gl_stat) (pglob->gl_pathv[i], &st) == 0
+		&& S_ISDIR (st.st_mode))
+	     : (__stat64 (pglob->gl_pathv[i], &st64) == 0
+		&& S_ISDIR (st64.st_mode))))
+	  {
+	    size_t len = strlen (pglob->gl_pathv[i]) + 2;
+	    char *new = realloc (pglob->gl_pathv[i], len);
+	    if (new == NULL)
+	      {
+		globfree (pglob);
+		pglob->gl_pathc = 0;
+		return GLOB_NOSPACE;
+	      }
+	    strcpy (&new[len - 2], "/");
+	    pglob->gl_pathv[i] = new;
+	  }
+    }
+
+  if (!(flags & GLOB_NOSORT))
+    {
+      /* Sort the vector.  */
+      qsort (&pglob->gl_pathv[oldcount],
+	     pglob->gl_pathc + pglob->gl_offs - oldcount,
+	     sizeof (char *), collated_compare);
+    }
+
+ out:
+  if (__glibc_unlikely (malloc_dirname))
+    free (dirname);
+
+  return retval;
+}
+#if defined _LIBC && !defined glob
+libc_hidden_def (glob)
+#endif
+
+
+#if !defined _LIBC || !defined GLOB_ONLY_P
+
+/* Free storage allocated in PGLOB by a previous `glob' call.  */
+void
+globfree (glob_t *pglob)
+{
+  if (pglob->gl_pathv != NULL)
+    {
+      size_t i;
+      for (i = 0; i < pglob->gl_pathc; ++i)
+	free (pglob->gl_pathv[pglob->gl_offs + i]);
+      free (pglob->gl_pathv);
+      pglob->gl_pathv = NULL;
+    }
+}
+#if defined _LIBC && !defined globfree
+libc_hidden_def (globfree)
+#endif
+
+
+/* Do a collated comparison of A and B.  */
+static int
+collated_compare (const void *a, const void *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 (const char *dirname, char **array, size_t n)
+{
+  size_t i;
+  size_t dirlen = strlen (dirname);
+#if defined __MSDOS__ || defined WINDOWS32
+  int sep_char = '/';
+# define DIRSEP_CHAR sep_char
+#else
+# define DIRSEP_CHAR '/'
+#endif
+
+  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;
+#if defined __MSDOS__ || defined WINDOWS32
+  else if (dirlen > 1)
+    {
+      if (dirname[dirlen - 1] == '/' && dirname[dirlen - 2] == ':')
+	/* DIRNAME is "d:/".  Don't prepend the slash from DIRNAME.  */
+	--dirlen;
+      else if (dirname[dirlen - 1] == ':')
+	{
+	  /* DIRNAME is "d:".  Use `:' instead of `/'.  */
+	  --dirlen;
+	  sep_char = ':';
+	}
+    }
+#endif
+
+  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 (array[--i]);
+	  return 1;
+	}
+
+      {
+	char *endp = mempcpy (new, dirname, dirlen);
+	*endp++ = DIRSEP_CHAR;
+	mempcpy (endp, array[i], eltlen);
+      }
+      free (array[i]);
+      array[i] = new;
+    }
+
+  return 0;
+}
+
+
+/* We must not compile this function twice.  */
+#if !defined _LIBC || !defined NO_GLOB_PATTERN_P
+int
+__glob_pattern_type (const char *pattern, int quote)
+{
+  const char *p;
+  int ret = 0;
+
+  for (p = pattern; *p != '\0'; ++p)
+    switch (*p)
+      {
+      case '?':
+      case '*':
+	return 1;
+
+      case '\\':
+	if (quote)
+	  {
+	    if (p[1] != '\0')
+	      ++p;
+	    ret |= 2;
+	  }
+	break;
+
+      case '[':
+	ret |= 4;
+	break;
+
+      case ']':
+	if (ret & 4)
+	  return 1;
+	break;
+      }
+
+  return ret;
+}
+
+/* Return nonzero if PATTERN contains any metacharacters.
+   Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
+int
+__glob_pattern_p (const char *pattern, int quote)
+{
+  return __glob_pattern_type (pattern, quote) == 1;
+}
+# ifdef _LIBC
+weak_alias (__glob_pattern_p, glob_pattern_p)
+# endif
+#endif
+
+#endif /* !GLOB_ONLY_P */
+
+
+/* We put this in a separate function mainly to allow the memory
+   allocated with alloca to be recycled.  */
+#if !defined _LIBC || !defined GLOB_ONLY_P
+static int
+__attribute_noinline__
+link_exists2_p (const char *dir, size_t dirlen, const char *fname,
+	       glob_t *pglob
+# ifndef _LIBC
+		, int flags
+# endif
+		)
+{
+  size_t fnamelen = strlen (fname);
+  char *fullname = (char *) __alloca (dirlen + 1 + fnamelen + 1);
+  struct stat st;
+# ifndef _LIBC
+  struct_stat64 st64;
+# endif
+
+  mempcpy (mempcpy (mempcpy (fullname, dir, dirlen), "/", 1),
+	   fname, fnamelen + 1);
+
+# ifdef _LIBC
+  return (*pglob->gl_stat) (fullname, &st) == 0;
+# else
+  return ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+	   ? (*pglob->gl_stat) (fullname, &st)
+	   : __stat64 (fullname, &st64)) == 0);
+# endif
+}
+# ifdef _LIBC
+#  define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
+  (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)			      \
+   ? link_exists2_p (dirname, dirnamelen, fname, pglob)			      \
+   : ({ struct stat64 st64;						      \
+       __fxstatat64 (_STAT_VER, dfd, fname, &st64, 0) == 0; }))
+# else
+#  define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
+  link_exists2_p (dirname, dirnamelen, fname, pglob, flags)
+# endif
+#endif
+
+
+/* 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 (const char *pattern, const char *directory, int flags,
+	     int (*errfunc) (const char *, int),
+	     glob_t *pglob, size_t alloca_used)
+{
+  size_t dirlen = strlen (directory);
+  void *stream = NULL;
+  struct globnames
+    {
+      struct globnames *next;
+      size_t count;
+      char *name[64];
+    };
+#define INITIAL_COUNT sizeof (init_names.name) / sizeof (init_names.name[0])
+  struct globnames init_names;
+  struct globnames *names = &init_names;
+  struct globnames *names_alloca = &init_names;
+  size_t nfound = 0;
+  size_t cur = 0;
+  int meta;
+  int save;
+
+  alloca_used += sizeof (init_names);
+
+  init_names.next = NULL;
+  init_names.count = INITIAL_COUNT;
+
+  meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE));
+  if (meta == 0 && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
+    {
+      /* We need not do any tests.  The PATTERN contains no meta
+	 characters and we must not return an error therefore the
+	 result will always contain exactly one name.  */
+      flags |= GLOB_NOCHECK;
+    }
+  else if (meta == 0)
+    {
+      /* Since we use the normal file functions we can also use stat()
+	 to verify the file is there.  */
+      union
+      {
+	struct stat st;
+	struct_stat64 st64;
+      } ust;
+      size_t patlen = strlen (pattern);
+      int alloca_fullname = __libc_use_alloca (alloca_used
+					       + dirlen + 1 + patlen + 1);
+      char *fullname;
+      if (alloca_fullname)
+	fullname = alloca_account (dirlen + 1 + patlen + 1, alloca_used);
+      else
+	{
+	  fullname = malloc (dirlen + 1 + patlen + 1);
+	  if (fullname == NULL)
+	    return GLOB_NOSPACE;
+	}
+
+      mempcpy (mempcpy (mempcpy (fullname, directory, dirlen),
+			"/", 1),
+	       pattern, patlen + 1);
+      if ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+	   ? (*pglob->gl_stat) (fullname, &ust.st)
+	   : __stat64 (fullname, &ust.st64)) == 0)
+	/* We found this file to be existing.  Now tell the rest
+	   of the function to copy this name into the result.  */
+	flags |= GLOB_NOCHECK;
+
+      if (__glibc_unlikely (!alloca_fullname))
+	free (fullname);
+    }
+  else
+    {
+      stream = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+		? (*pglob->gl_opendir) (directory)
+		: opendir (directory));
+      if (stream == NULL)
+	{
+	  if (errno != ENOTDIR
+	      && ((errfunc != NULL && (*errfunc) (directory, errno))
+		  || (flags & GLOB_ERR)))
+	    return GLOB_ABORTED;
+	}
+      else
+	{
+#ifdef _LIBC
+	  int dfd = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
+		     ? -1 : dirfd ((DIR *) stream));
+#endif
+	  int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0)
+			   | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
+#if defined _AMIGA || defined VMS
+			   | FNM_CASEFOLD
+#endif
+			   );
+	  flags |= GLOB_MAGCHAR;
+
+	  while (1)
+	    {
+	      struct readdir_result d;
+	      {
+		if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
+		  d = convert_dirent (GL_READDIR (pglob, stream));
+		else
+		  {
+#ifdef COMPILE_GLOB64
+		    d = convert_dirent (__readdir (stream));
+#else
+		    d = convert_dirent64 (__readdir64 (stream));
+#endif
+		  }
+	      }
+	      if (d.name == NULL)
+		break;
+	      if (d.skip_entry)
+		continue;
+
+	      /* If we shall match only directories use the information
+		 provided by the dirent call if possible.  */
+	      if ((flags & GLOB_ONLYDIR) && !readdir_result_might_be_dir (d))
+		continue;
+
+	      if (fnmatch (pattern, d.name, fnm_flags) == 0)
+		{
+		  /* If the file we found is a symlink we have to
+		     make sure the target file exists.  */
+		  if (!readdir_result_might_be_symlink (d)
+		      || link_exists_p (dfd, directory, dirlen, d.name,
+					pglob, flags))
+		    {
+		      if (cur == names->count)
+			{
+			  struct globnames *newnames;
+			  size_t count = names->count * 2;
+			  size_t size = (sizeof (struct globnames)
+					 + ((count - INITIAL_COUNT)
+					    * sizeof (char *)));
+			  if (__libc_use_alloca (alloca_used + size))
+			    newnames = names_alloca
+			      = alloca_account (size, alloca_used);
+			  else if ((newnames = malloc (size))
+				   == NULL)
+			    goto memory_error;
+			  newnames->count = count;
+			  newnames->next = names;
+			  names = newnames;
+			  cur = 0;
+			}
+		      names->name[cur] = strdup (d.name);
+		      if (names->name[cur] == NULL)
+			goto memory_error;
+		      ++cur;
+		      ++nfound;
+		    }
+		}
+	    }
+	}
+    }
+
+  if (nfound == 0 && (flags & GLOB_NOCHECK))
+    {
+      size_t len = strlen (pattern);
+      nfound = 1;
+      names->name[cur] = (char *) malloc (len + 1);
+      if (names->name[cur] == NULL)
+	goto memory_error;
+      *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0';
+    }
+
+  int result = GLOB_NOMATCH;
+  if (nfound != 0)
+    {
+      result = 0;
+
+      if (pglob->gl_pathc > UINTPTR_MAX - pglob->gl_offs
+	  || pglob->gl_pathc + pglob->gl_offs > UINTPTR_MAX - nfound
+	  || pglob->gl_pathc + pglob->gl_offs + nfound > UINTPTR_MAX - 1
+	  || (pglob->gl_pathc + pglob->gl_offs + nfound + 1
+	      > UINTPTR_MAX / sizeof (char *)))
+	goto memory_error;
+
+      char **new_gl_pathv;
+      new_gl_pathv
+	= (char **) realloc (pglob->gl_pathv,
+			     (pglob->gl_pathc + pglob->gl_offs + nfound + 1)
+			     * sizeof (char *));
+      if (new_gl_pathv == NULL)
+	{
+	memory_error:
+	  while (1)
+	    {
+	      struct globnames *old = names;
+	      for (size_t i = 0; i < cur; ++i)
+		free (names->name[i]);
+	      names = names->next;
+	      /* NB: we will not leak memory here if we exit without
+		 freeing the current block assigned to OLD.  At least
+		 the very first block is always allocated on the stack
+		 and this is the block assigned to OLD here.  */
+	      if (names == NULL)
+		{
+		  assert (old == &init_names);
+		  break;
+		}
+	      cur = names->count;
+	      if (old == names_alloca)
+		names_alloca = names;
+	      else
+		free (old);
+	    }
+	  result = GLOB_NOSPACE;
+	}
+      else
+	{
+	  while (1)
+	    {
+	      struct globnames *old = names;
+	      for (size_t i = 0; i < cur; ++i)
+		new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++]
+		  = names->name[i];
+	      names = names->next;
+	      /* NB: we will not leak memory here if we exit without
+		 freeing the current block assigned to OLD.  At least
+		 the very first block is always allocated on the stack
+		 and this is the block assigned to OLD here.  */
+	      if (names == NULL)
+		{
+		  assert (old == &init_names);
+		  break;
+		}
+	      cur = names->count;
+	      if (old == names_alloca)
+		names_alloca = names;
+	      else
+		free (old);
+	    }
+
+	  pglob->gl_pathv = new_gl_pathv;
+
+	  pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
+
+	  pglob->gl_flags = flags;
+	}
+    }
+
+  if (stream != NULL)
+    {
+      save = errno;
+      if (__glibc_unlikely (flags & GLOB_ALTDIRFUNC))
+	(*pglob->gl_closedir) (stream);
+      else
+	closedir (stream);
+      __set_errno (save);
+    }
+
+  return result;
+}