[platform/upstream/linaro-glibc.git] / sysdeps / generic / glob.c

/* Copyright (C) 1991-2002,2003,2004,2005 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 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

/* Enable GNU extensions in glob.h.  */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE    1
#endif

#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

/* Outcomment the following line for production quality code.  */
/* #define NDEBUG 1 */
#include <assert.h>

#include <stdio.h>              /* Needed on stupid SunOS for assert.  */


/* 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.  */

#define GLOB_INTERFACE_VERSION 1
#if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
# include <gnu-versions.h>
# if _GNU_GLOB_INTERFACE_VERSION == GLOB_INTERFACE_VERSION
#  define ELIDE_CODE
# endif
#endif

#ifndef ELIDE_CODE
#if !defined _LIBC || !defined GLOB_ONLY_P

#if defined STDC_HEADERS || defined __GNU_LIBRARY__
# include <stddef.h>
#endif

#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
# ifndef POSIX
#  ifdef _POSIX_VERSION
#   define POSIX
#  endif
# endif
#endif

#if !defined _AMIGA && !defined VMS && !defined WINDOWS32
# include <pwd.h>
#endif

#if !defined __GNU_LIBRARY__ && !defined STDC_HEADERS
extern int errno;
#endif
#ifndef __set_errno
# define __set_errno(val) errno = (val)
#endif

#ifndef NULL
# define NULL   0
#endif


#if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# 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


/* In GNU systems, <dirent.h> defines this macro for us.  */
#ifdef _D_NAMLEN
# undef NAMLEN
# define NAMLEN(d) _D_NAMLEN(d)
#endif

/* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available
   if the `d_type' member for `struct dirent' is available.  */
#ifdef _DIRENT_HAVE_D_TYPE
# define HAVE_D_TYPE    1
#endif

#if _LIBC
# define HAVE_DIRENT64  1
#endif

/* If the system has the `struct dirent64' type we use it internally.  */
#if defined HAVE_DIRENT64 && !defined COMPILE_GLOB64
# if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
#  define CONVERT_D_NAMLEN(d64, d32)
# else
#  define CONVERT_D_NAMLEN(d64, d32) \
  (d64)->d_namlen = (d32)->d_namlen;
# endif

# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
#  define CONVERT_D_INO(d64, d32)
# else
#  define CONVERT_D_INO(d64, d32) \
  (d64)->d_ino = (d32)->d_ino;
# endif

# ifdef HAVE_D_TYPE
#  define CONVERT_D_TYPE(d64, d32) \
  (d64)->d_type = (d32)->d_type;
# else
#  define CONVERT_D_TYPE(d64, d32)
# endif

# define CONVERT_DIRENT_DIRENT64(d64, d32) \
  memcpy ((d64)->d_name, (d32)->d_name, NAMLEN (d32) + 1);                    \
  CONVERT_D_NAMLEN (d64, d32)                                                 \
  CONVERT_D_INO (d64, d32)                                                    \
  CONVERT_D_TYPE (d64, d32)
#endif


#if (defined POSIX || defined WINDOWS32) && !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.  */

extern char *getenv ();

# 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.  */

/* NAME_MAX is usually defined in <dirent.h> or <limits.h>.  */
#if defined HAVE_LIMITS_H || defined __GNU_LIBRARY__
# include <limits.h>
#endif
#ifndef NAME_MAX
# define NAME_MAX (sizeof (((struct dirent *) 0)->d_name))
#endif

#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.  */

#if !defined HAVE_STRCOLL && !defined _LIBC
# define strcoll        strcmp
#endif

#if !defined HAVE_MEMPCPY && __GLIBC__ - 0 == 2 && __GLIBC_MINOR__ >= 1
# define HAVE_MEMPCPY   1
# undef  mempcpy
# define mempcpy(Dest, Src, Len) __mempcpy (Dest, Src, Len)
#endif

#ifndef __GNU_LIBRARY__
# ifdef __GNUC__
__inline
# endif
# ifndef __SASC
#  ifdef WINDOWS32
static void *
#  else
static char *
# endif
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 /* __SASC */
#endif /* __GNU_LIBRARY__ */


#if !defined __alloca && !defined __GNU_LIBRARY__

# ifdef __GNUC__
#  undef alloca
#  define alloca(n)     __builtin_alloca (n)
# else  /* Not GCC.  */
#  ifdef HAVE_ALLOCA_H
#   include <alloca.h>
#  else /* Not HAVE_ALLOCA_H.  */
#   ifndef _AIX
#    ifdef WINDOWS32
#     include <malloc.h>
#    else
extern char *alloca ();
#    endif /* WINDOWS32 */
#   endif /* Not _AIX.  */
#  endif /* sparc or HAVE_ALLOCA_H.  */
# endif /* GCC.  */

# define __alloca       alloca

#endif

#ifndef __GNU_LIBRARY__
# define __stat stat
# ifdef STAT_MACROS_BROKEN
#  undef S_ISDIR
# endif
# ifndef S_ISDIR
#  define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
# endif
#endif

#ifdef _LIBC
# include <alloca.h>
# 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 HAVE_STAT64    1
#endif

#ifndef HAVE_STAT64
# define __stat64(fname, buf) __stat (fname, buf)
/* This is the variable name we are using.  */
# define st64 st
#endif

#if !(defined STDC_HEADERS || defined __GNU_LIBRARY__)
# 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.  */
#ifndef __GNU_LIBRARY__
# undef FNM_PATHNAME
# undef FNM_NOESCAPE
# undef FNM_PERIOD
#endif
#include <fnmatch.h>

/* Some system header files erroneously define these.
   We want our own definitions from <glob.h> to take precedence.  */
#ifndef __GNU_LIBRARY__
# undef GLOB_ERR
# undef GLOB_MARK
# undef GLOB_NOSORT
# undef GLOB_DOOFFS
# undef GLOB_NOCHECK
# undef GLOB_APPEND
# undef GLOB_NOESCAPE
# undef GLOB_PERIOD
#endif
#include <glob.h>

#ifdef HAVE_GETLOGIN_R
extern int getlogin_r (char *, size_t);
#else
extern char *getlogin (void);
#endif
\f
static const char *next_brace_sub (const char *begin, int flags) __THROW;

#endif /* GLOB_ONLY_P */

static int glob_in_dir (const char *pattern, const char *directory,
                        int flags, int (*errfunc) (const char *, int),
                        glob_t *pglob);

#if !defined _LIBC || !defined GLOB_ONLY_P
static int prefix_array (const char *prefix, char **array, size_t n) __THROW;
static int collated_compare (const __ptr_t, const __ptr_t) __THROW;


/* Find the end of the sub-pattern in a brace expression.  */
static const char *
next_brace_sub (cp, flags)
     const char *cp;
     int flags;
{
  unsigned int 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 /* !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 (pattern, flags, errfunc, pglob)
     const char *pattern;
     int flags;
     int (*errfunc) (const char *, int);
     glob_t *pglob;
{
  const char *filename;
  const char *dirname;
  size_t dirlen;
  int status;
  size_t oldcount;

  if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0)
    {
      __set_errno (EINVAL);
      return -1;
    }

  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_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;
#ifdef __GNUC__
          char onealt[strlen (pattern) - 1];
#else
          char *onealt = (char *) malloc (strlen (pattern) - 1);
          if (onealt == NULL)
            {
              if (!(flags & GLOB_APPEND))
                {
                  pglob->gl_pathc = 0;
                  pglob->gl_pathv = NULL;
                }
              return GLOB_NOSPACE;
            }
#endif

          /* We know the prefix for all sub-patterns.  */
#ifdef HAVE_MEMPCPY
          alt_start = mempcpy (onealt, pattern, begin - pattern);
#else
          memcpy (onealt, pattern, begin - pattern);
          alt_start = &onealt[begin - pattern];
#endif

          /* 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.  */
#ifndef __GNUC__
              free (onealt);
#endif
              return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
            }

          /* 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.  */
#ifndef __GNUC__
                  free (onealt);
#endif
                  return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
                }
            }
          /* 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.  */

          if (!(flags & GLOB_APPEND))
            {
              /* This call is to set a new vector, so clear out the
                 vector so we can append to it.  */
              pglob->gl_pathc = 0;
              pglob->gl_pathv = NULL;
            }
          firstc = pglob->gl_pathc;

          p = begin + 1;
          while (1)
            {
              int result;

              /* Construct the new glob expression.  */
#ifdef HAVE_MEMPCPY
              mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len);
#else
              memcpy (alt_start, p, next - p);
              memcpy (&alt_start[next - p], rest, rest_len);
#endif

              result = glob (onealt,
                             ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC))
                              | GLOB_APPEND), errfunc, pglob);

              /* If we got an error, return it.  */
              if (result && result != GLOB_NOMATCH)
                {
#ifndef __GNUC__
                  free (onealt);
#endif
                  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);
            }

#ifndef __GNUC__
          free (onealt);
#endif

          if (pglob->gl_pathc != firstc)
            /* We found some entries.  */
            return 0;
          else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
            return GLOB_NOMATCH;
        }
    }

  /* 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 */
  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 = 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
        {
          filename = pattern;
#ifdef _AMIGA
          dirname = "";
#else
          dirname = ".";
#endif
          dirlen = 0;
        }
    }
  else if (filename == pattern)
    {
      /* "/pattern".  */
      dirname = "/";
      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);
#ifdef HAVE_MEMPCPY
          *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0';
#else
          memcpy (drive_spec, pattern, dirlen);
          drive_spec[dirlen] = '\0';
#endif
          /* 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
      newp = (char *) __alloca (dirlen + 1);
#ifdef HAVE_MEMPCPY
      *((char *) mempcpy (newp, pattern, dirlen)) = '\0';
#else
      memcpy (newp, pattern, dirlen);
      newp[dirlen] = '\0';
#endif
      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 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;
      if (!(flags & GLOB_DOOFFS))
        pglob->gl_pathv = NULL;
      else
        {
          size_t i;
          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;
        }
    }

  oldcount = pglob->gl_pathc + pglob->gl_offs;

#ifndef VMS
  if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~')
    {
      if (dirname[1] == '\0' || dirname[1] == '/')
        {
          /* Look up home directory.  */
          const char *home_dir = getenv ("HOME");
# 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;
#   if defined HAVE_GETLOGIN_R || defined _LIBC
              size_t buflen = sysconf (_SC_LOGIN_NAME_MAX) + 1;

              if (buflen == 0)
                /* `sysconf' does not support _SC_LOGIN_NAME_MAX.  Try
                   a moderate value.  */
                buflen = 20;
              name = (char *) __alloca (buflen);

              success = getlogin_r (name, buflen) == 0;
#   else
              success = (name = getlogin ()) != NULL;
#   endif
              if (success)
                {
                  struct passwd *p;
#   if defined HAVE_GETPWNAM_R || defined _LIBC
                  long int pwbuflen = sysconf (_SC_GETPW_R_SIZE_MAX);
                  char *pwtmpbuf;
                  struct passwd pwbuf;
                  int save = errno;

#    ifndef _LIBC
                  if (pwbuflen == -1)
                    /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX.
                       Try a moderate value.  */
                    pwbuflen = 1024;
#    endif
                  pwtmpbuf = (char *) __alloca (pwbuflen);

                  while (getpwnam_r (name, &pwbuf, pwtmpbuf, pwbuflen, &p)
                         != 0)
                    {
                      if (errno != ERANGE)
                        {
                          p = NULL;
                          break;
                        }
#    ifdef _LIBC
                      pwtmpbuf = extend_alloca (pwtmpbuf, pwbuflen,
                                                2 * pwbuflen);
#    else
                      pwbuflen *= 2;
                      pwtmpbuf = (char *) __alloca (pwbuflen);
#    endif
                      __set_errno (save);
                    }
#   else
                  p = getpwnam (name);
#   endif
                  if (p != NULL)
                    home_dir = p->pw_dir;
                }
            }
          if (home_dir == NULL || home_dir[0] == '\0')
            {
              if (flags & GLOB_TILDE_CHECK)
                return GLOB_NOMATCH;
              else
                home_dir = "~"; /* No luck.  */
            }
#  endif /* WINDOWS32 */
# endif
          /* Now construct the full directory.  */
          if (dirname[1] == '\0')
            dirname = home_dir;
          else
            {
              char *newp;
              size_t home_len = strlen (home_dir);
              newp = (char *) __alloca (home_len + dirlen);
# ifdef HAVE_MEMPCPY
              mempcpy (mempcpy (newp, home_dir, home_len),
                       &dirname[1], dirlen);
# else
              memcpy (newp, home_dir, home_len);
              memcpy (&newp[home_len], &dirname[1], dirlen);
# endif
              dirname = newp;
            }
        }
# if !defined _AMIGA && !defined WINDOWS32
      else
        {
          char *end_name = strchr (dirname, '/');
          const char *user_name;
          const char *home_dir;

          if (end_name == NULL)
            user_name = dirname + 1;
          else
            {
              char *newp;
              newp = (char *) __alloca (end_name - dirname);
# ifdef HAVE_MEMPCPY
              *((char *) mempcpy (newp, dirname + 1, end_name - dirname))
                = '\0';
# else
              memcpy (newp, dirname + 1, end_name - dirname);
              newp[end_name - dirname - 1] = '\0';
# endif
              user_name = newp;
            }

          /* Look up specific user's home directory.  */
          {
            struct passwd *p;
#  if defined HAVE_GETPWNAM_R || defined _LIBC
            long int buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
            char *pwtmpbuf;
            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
            pwtmpbuf = (char *) __alloca (buflen);

            while (getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) != 0)
              {
                if (errno != ERANGE)
                  {
                    p = NULL;
                    break;
                  }
#   ifdef _LIBC
                pwtmpbuf = extend_alloca (pwtmpbuf, buflen, 2 * buflen);
#   else
                buflen *= 2;
                pwtmpbuf = __alloca (buflen);
#   endif
                __set_errno (save);
              }
#  else
            p = getpwnam (user_name);
#  endif
            if (p != NULL)
              home_dir = p->pw_dir;
            else
              home_dir = NULL;
          }
          /* If we found a home directory use this.  */
          if (home_dir != NULL)
            {
              char *newp;
              size_t home_len = strlen (home_dir);
              size_t rest_len = end_name == NULL ? 0 : strlen (end_name);
              newp = (char *) __alloca (home_len + rest_len + 1);
#  ifdef HAVE_MEMPCPY
              *((char *) mempcpy (mempcpy (newp, home_dir, home_len),
                                  end_name, rest_len)) = '\0';
#  else
              memcpy (newp, home_dir, home_len);
              memcpy (&newp[home_len], end_name, rest_len);
              newp[home_len + rest_len] = '\0';
#  endif
              dirname = newp;
            }
          else
            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;
#ifdef HAVE_STAT64
      struct stat64 st64;
#endif

      /* Return the directory if we don't check for error or if it exists.  */
      if ((flags & GLOB_NOCHECK)
          || (((flags & GLOB_ALTDIRFUNC)
               ? ((*pglob->gl_stat) (dirname, &st) == 0
                  && S_ISDIR (st.st_mode))
               : (__stat64 (dirname, &st64) == 0 && S_ISDIR (st64.st_mode)))))
        {
          int newcount = pglob->gl_pathc + pglob->gl_offs;
          char **new_gl_pathv;

          new_gl_pathv
            = (char **) realloc (pglob->gl_pathv,
                                 (newcount + 1 + 1) * sizeof (char *));
          if (new_gl_pathv == NULL)
            {
            nospace:
              free (pglob->gl_pathv);
              pglob->gl_pathv = NULL;
              pglob->gl_pathc = 0;
              return GLOB_NOSPACE;
            }
          pglob->gl_pathv = new_gl_pathv;

#if defined HAVE_STRDUP || defined _LIBC
           pglob->gl_pathv[newcount] = strdup (dirname);
#else
          {
            size_t len = strlen (dirname) + 1;
            char *dircopy = (char *) malloc (len);
            if (dircopy != NULL)
              pglob->gl_pathv[newcount] = memcpy (dircopy, dirname, len);
          }
#endif
          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;
    }

  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;
      size_t i;

      if ((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_NOCHECK | GLOB_NOESCAPE
                                | GLOB_ALTDIRFUNC))
                      | GLOB_NOSORT | GLOB_ONLYDIR),
                     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 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);
          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.  */
          if (flags & GLOB_NOCHECK)
            {
              int newcount = pglob->gl_pathc + pglob->gl_offs;
              char **new_gl_pathv;

              new_gl_pathv = (char **) realloc (pglob->gl_pathv,
                                                (newcount + 2)
                                                * sizeof (char *));
              if (new_gl_pathv == NULL)
                {
                  globfree (&dirs);
                  return GLOB_NOSPACE;
                }
              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
    {
      int old_pathc = pglob->gl_pathc;

      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[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;
#ifdef HAVE_STAT64
      struct stat64 st64;
#endif

      for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i)
        if (((flags & GLOB_ALTDIRFUNC)
             ? ((*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 ((__ptr_t) &pglob->gl_pathv[oldcount],
             pglob->gl_pathc + pglob->gl_offs - oldcount,
             sizeof (char *), collated_compare);
    }

  return 0;
}
#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 (pglob)
     register glob_t *pglob;
{
  if (pglob->gl_pathv != NULL)
    {
      size_t i;
      for (i = 0; i < pglob->gl_pathc; ++i)
        if (pglob->gl_pathv[pglob->gl_offs + i] != NULL)
          free ((__ptr_t) pglob->gl_pathv[pglob->gl_offs + i]);
      free ((__ptr_t) 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 (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 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 ((__ptr_t) array[--i]);
          return 1;
        }

#ifdef HAVE_MEMPCPY
      {
        char *endp = (char *) mempcpy (new, dirname, dirlen);
        *endp++ = DIRSEP_CHAR;
        mempcpy (endp, array[i], eltlen);
      }
#else
      memcpy (new, dirname, dirlen);
      new[dirlen] = DIRSEP_CHAR;
      memcpy (&new[dirlen + 1], array[i], eltlen);
#endif
      free ((__ptr_t) array[i]);
      array[i] = new;
    }

  return 0;
}


/* We must not compile this function twice.  */
#if !defined _LIBC || !defined NO_GLOB_PATTERN_P
/* Return nonzero if PATTERN contains any metacharacters.
   Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
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[1] != '\0')
          ++p;
        break;

      case '[':
        open = 1;
        break;

      case ']':
        if (open)
          return 1;
        break;
      }

  return 0;
}
# 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
link_exists_p (const char *dir, size_t dirlen, const char *fname,
               glob_t *pglob, int flags)
{
  size_t fnamelen = strlen (fname);
  char *fullname = (char *) __alloca (dirlen + 1 + fnamelen + 1);
  struct stat st;
  struct stat64 st64;

# ifdef HAVE_MEMPCPY
  mempcpy (mempcpy (mempcpy (fullname, dir, dirlen), "/", 1),
           fname, fnamelen + 1);
# else
  memcpy (fullname, dir, dirlen);
  fullname[dirlen] = '/';
  memcpy (&fullname[dirlen + 1], fname, fnamelen + 1);
# endif

  return (((flags & GLOB_ALTDIRFUNC)
           ? (*pglob->gl_stat) (fullname, &st)
           : __stat64 (fullname, &st64)) == 0);
}
#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 (pattern, directory, flags, errfunc, pglob)
     const char *pattern;
     const char *directory;
     int flags;
     int (*errfunc) (const char *, int);
     glob_t *pglob;
{
  size_t dirlen = strlen (directory);
  __ptr_t stream = NULL;
  struct globlink
    {
      struct globlink *next;
      char *name;
    };
  struct globlink *names = NULL;
  size_t nfound;
  int meta;
  int save;

  meta = __glob_pattern_p (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;
      nfound = 0;
    }
  else if (meta == 0 &&
           ((flags & GLOB_NOESCAPE) || strchr (pattern, '\\') == NULL))
    {
      /* Since we use the normal file functions we can also use stat()
         to verify the file is there.  */
      struct stat st;
# ifdef HAVE_STAT64
      struct stat64 st64;
# endif
      size_t patlen = strlen (pattern);
      char *fullname = (char *) __alloca (dirlen + 1 + patlen + 1);

# ifdef HAVE_MEMPCPY
      mempcpy (mempcpy (mempcpy (fullname, directory, dirlen),
                        "/", 1),
               pattern, patlen + 1);
# else
      memcpy (fullname, directory, dirlen);
      fullname[dirlen] = '/';
      memcpy (&fullname[dirlen + 1], pattern, patlen + 1);
# endif
      if (((flags & GLOB_ALTDIRFUNC)
           ? (*pglob->gl_stat) (fullname, &st)
           : __stat64 (fullname, &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;

      nfound = 0;
    }
  else
    {
      if (pattern[0] == '\0')
        {
          /* This is a special case for matching directories like in
             "*a/".  */
          names = (struct globlink *) __alloca (sizeof (struct globlink));
          names->name = (char *) malloc (1);
          if (names->name == NULL)
            goto memory_error;
          names->name[0] = '\0';
          names->next = NULL;
          nfound = 1;
          meta = 0;
        }
      else
        {
          stream = ((flags & GLOB_ALTDIRFUNC)
                    ? (*pglob->gl_opendir) (directory)
                    : (__ptr_t) opendir (directory));
          if (stream == NULL)
            {
              if (errno != ENOTDIR
                  && ((errfunc != NULL && (*errfunc) (directory, errno))
                      || (flags & GLOB_ERR)))
                return GLOB_ABORTED;
              nfound = 0;
              meta = 0;
            }
          else
            {
              int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0)
                               | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
#if defined _AMIGA || defined VMS
                               | FNM_CASEFOLD
#endif
                               );
              nfound = 0;
              flags |= GLOB_MAGCHAR;

              while (1)
                {
                  const char *name;
                  size_t len;
#if defined HAVE_DIRENT64 && !defined COMPILE_GLOB64
                  struct dirent64 *d;
                  union
                    {
                      struct dirent64 d64;
                      char room [offsetof (struct dirent64, d_name[0])
                                 + NAME_MAX + 1];
                    }
                  d64buf;

                  if (flags & GLOB_ALTDIRFUNC)
                    {
                      struct dirent *d32 = (*pglob->gl_readdir) (stream);
                      if (d32 != NULL)
                        {
                          CONVERT_DIRENT_DIRENT64 (&d64buf.d64, d32);
                          d = &d64buf.d64;
                        }
                      else
                        d = NULL;
                    }
                  else
                    d = __readdir64 ((DIR *) stream);
#else
                  struct dirent *d = ((flags & GLOB_ALTDIRFUNC)
                                      ? ((struct dirent *)
                                         (*pglob->gl_readdir) (stream))
                                      : __readdir ((DIR *) stream));
#endif
                  if (d == NULL)
                    break;
                  if (! REAL_DIR_ENTRY (d))
                    continue;

#ifdef HAVE_D_TYPE
                  /* If we shall match only directories use the information
                     provided by the dirent call if possible.  */
                  if ((flags & GLOB_ONLYDIR)
                      && d->d_type != DT_UNKNOWN
                      && d->d_type != DT_DIR
                      && d->d_type != DT_LNK)
                    continue;
#endif

                  name = d->d_name;

                  if (fnmatch (pattern, name, fnm_flags) == 0)
                    {
                      /* If the file we found is a symlink we have to
                         make sure the target file exists.  */
                      if (
#ifdef HAVE_D_TYPE
                          (d->d_type != DT_UNKNOWN && d->d_type != DT_LNK) ||
#endif
                          link_exists_p (directory, dirlen, name, pglob,
                                         flags))
                        {
                          struct globlink *new = (struct globlink *)
                            __alloca (sizeof (struct globlink));
                          len = NAMLEN (d);
                          new->name = (char *) malloc (len + 1);
                          if (new->name == NULL)
                            goto memory_error;
#ifdef HAVE_MEMPCPY
                          *((char *) mempcpy ((__ptr_t) new->name, name, len))
                            = '\0';
#else
                          memcpy ((__ptr_t) new->name, name, len);
                          new->name[len] = '\0';
#endif
                          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 + 1);
      if (names->name == NULL)
        goto memory_error;
#ifdef HAVE_MEMPCPY
      *((char *) mempcpy (names->name, pattern, len)) = '\0';
#else
      memcpy (names->name, pattern, len);
      names->name[len] = '\0';
#endif
    }

  if (nfound != 0)
    {
      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)
        goto memory_error;
      pglob->gl_pathv = new_gl_pathv;

      for (; names != NULL; names = names->next)
        pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc++] = names->name;
      pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;

      pglob->gl_flags = flags;
    }

  save = errno;
  if (stream != NULL)
    {
      if (flags & GLOB_ALTDIRFUNC)
        (*pglob->gl_closedir) (stream);
      else
        closedir ((DIR *) stream);
    }
  __set_errno (save);

  return nfound == 0 ? GLOB_NOMATCH : 0;

 memory_error:
  {
    int save = errno;
    if (flags & GLOB_ALTDIRFUNC)
      (*pglob->gl_closedir) (stream);
    else
      closedir ((DIR *) stream);
    __set_errno (save);
  }
  while (names != NULL)
    {
      if (names->name != NULL)
        free ((__ptr_t) names->name);
      names = names->next;
    }
  return GLOB_NOSPACE;
}

#endif  /* Not ELIDE_CODE.  */