568 lines
13 KiB
C
568 lines
13 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* IGNORE(@ */
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#include <ansidecl.h>
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/* @) */
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#include <glob.h>
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#include <fnmatch.h>
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#ifdef SHELL
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#include "config.h"
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#endif
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#include <errno.h>
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#ifdef __GNU_LIBRARY__
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#include <stddef.h>
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#endif
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#if !defined(__GNU_LIBRARY__) && !defined(STDC_HEADERS)
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extern int errno;
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#endif
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#if defined (USGr3) && !defined (DIRENT)
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#define DIRENT
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#endif /* USGr3 and not DIRENT. */
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#if defined (Xenix) && !defined (SYSNDIR)
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#define SYSNDIR
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#endif /* Xenix and not SYSNDIR. */
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#if defined (POSIX) || defined (DIRENT) || defined (__GNU_LIBRARY__)
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include <dirent.h>
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#else
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#if defined (USG) && !defined (sgi)
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#ifdef SYSNDIR
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#include <sys/ndir.h>
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#else /* not SYSNDIR */
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#include "ndir.h"
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#endif /* SYSNDIR */
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#else /* not USG */
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#include <sys/types.h>
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#include <sys/dir.h>
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#endif /* USG */
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#undef dirent
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#define dirent direct
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#endif /* POSIX or DIRENT or __GNU_LIBRARY__ */
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#if defined(__GNU_LIBRARY__) || !defined(POSIX) && !defined(USG)
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#define D_NAMLEN(d) ((d)->d_namlen)
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#else
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#define D_NAMLEN(d) strlen((d)->d_name)
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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#if defined(POSIX) && !defined(__GNU_LIBRARY__)
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/* Posix does not require that the d_ino field be present, and some
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systems do not provide it. */
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#define REAL_DIR_ENTRY(dp) 1
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#else
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#define REAL_DIR_ENTRY(dp) ((dp)->d_ino != 0)
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#endif
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#if defined(__GNU_LIBRARY__) || defined(POSIX)
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#include <unistd.h>
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#endif
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#if defined (STDC_HEADERS) || defined (__GNU_LIBRARY__)
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#include <stdlib.h>
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#include <string.h>
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#define STDC_STRINGS
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#else /* Not STDC_HEADERS and not __GNU_LIBRARY__. */
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#ifdef USG
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#include <string.h>
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#ifndef POSIX
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#include <memory.h>
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#endif /* Not POSIX. */
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#define STDC_STRINGS
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#else /* Not USG. */
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#ifdef NeXT
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#include <string.h>
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#else /* Not NeXT. */
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#include <strings.h>
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#endif /* NeXT. */
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/* Declaring bcopy causes errors on systems whose declarations are different.
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If the declaration is omitted, everything works fine. */
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#endif /* Not USG. */
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extern char *malloc ();
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extern char *realloc ();
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extern void free ();
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extern void qsort ();
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#ifdef __GNUC__
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__inline
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#endif
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static char *
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my_realloc (p, n)
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char *p;
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unsigned int n;
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{
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if (p == NULL)
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return malloc (n);
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return realloc (p, n);
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}
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#define realloc my_realloc
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#define strcoll strcmp
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#endif /* Not STDC_HEADERS or __GNU_LIBRARY__. */
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#ifndef STDC_STRINGS
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#define memcpy(d, s, n) bcopy((s), (d), (n))
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#define strrchr rindex
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/* memset is only used for zero here, but let's be paranoid. */
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#define memset(s, better_be_zero, n) \
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((void) ((better_be_zero) == 0 ? (bzero((s), (n)), 0) : (abort(), 0)))
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#endif
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#if !defined(__alloca) && !defined(__GNU_LIBRARY__)
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#ifdef __GNUC__
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#define alloca __builtin_alloca
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#else /* Not GCC. */
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#ifdef sparc
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#include <alloca.h>
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#else /* Not sparc. */
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extern char *alloca ();
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#endif /* sparc. */
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#endif /* GCC. */
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#define __alloca alloca
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#endif
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#ifndef __STDC__
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#undef size_t
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#define size_t unsigned int
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#endif
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static int EXFUN(glob_pattern_p, (CONST char *pattern, int quote));
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static int EXFUN(glob_in_dir, (CONST char *pattern, CONST char *directory,
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int flags,
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int EXFUN((*errfunc), (CONST char *, int)),
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glob_t *pglob));
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static int EXFUN(prefix_array, (CONST char *prefix, char **array, size_t n));
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static int EXFUN(collated_compare, (CONST PTR, CONST PTR));
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/* Do glob searching for PATTERN, placing results in PGLOB.
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The bits defined above may be set in FLAGS.
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If a directory cannot be opened or read and ERRFUNC is not nil,
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it is called with the pathname that caused the error, and the
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`errno' value from the failing call; if it returns non-zero
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`glob' returns GLOB_ABEND; if it returns zero, the error is ignored.
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If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
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Otherwise, `glob' returns zero. */
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int
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DEFUN(glob, (pattern, flags, errfunc, pglob),
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CONST char *pattern AND int flags AND
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int EXFUN((*errfunc), (CONST char *, int)) AND
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glob_t *pglob)
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{
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CONST char *filename;
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char *dirname;
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size_t dirlen;
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int status;
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int oldcount;
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if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0)
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{
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errno = EINVAL;
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return -1;
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}
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/* Find the filename. */
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filename = strrchr(pattern, '/');
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if (filename == NULL)
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{
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filename = pattern;
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dirname = (char *) ".";
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dirlen = 0;
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}
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else if (filename == pattern)
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{
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/* "/pattern". */
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dirname = (char *) "/";
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dirlen = 1;
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++filename;
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}
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else
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{
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dirlen = filename - pattern;
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dirname = (char *) __alloca(dirlen + 1);
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memcpy(dirname, pattern, dirlen);
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dirname[dirlen] = '\0';
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++filename;
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}
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if (filename[0] == '\0' && dirlen > 1)
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/* "pattern/". Expand "pattern", appending slashes. */
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return glob(dirname, flags|GLOB_MARK, errfunc, pglob);
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if (!(flags & GLOB_APPEND))
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{
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pglob->gl_pathc = 0;
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pglob->gl_pathv = NULL;
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}
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oldcount = pglob->gl_pathc;
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if (glob_pattern_p(dirname, !(flags & GLOB_NOESCAPE)))
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{
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/* The directory name contains metacharacters, so we
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have to glob for the directory, and then glob for
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the pattern in each directory found. */
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glob_t dirs;
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register int i;
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status = glob(dirname, ((flags & (GLOB_ERR|GLOB_NOCHECK|GLOB_NOESCAPE)) |
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GLOB_NOSORT),
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errfunc, &dirs);
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if (status != 0)
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return status;
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/* We have successfully globbed the preceding directory name.
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For each name we found, call glob_in_dir on it and FILENAME,
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appending the results to PGLOB. */
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for (i = 0; i < dirs.gl_pathc; ++i)
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{
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int oldcount;
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#ifdef SHELL
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{
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/* Make globbing interruptible in the bash shell. */
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extern int interrupt_state;
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if (interrupt_state)
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{
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globfree (&dirs);
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globfree (&files);
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return GLOB_ABEND;
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}
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}
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#endif /* SHELL. */
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oldcount = pglob->gl_pathc;
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status = glob_in_dir(filename, dirs.gl_pathv[i],
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(flags | GLOB_APPEND) & ~GLOB_NOCHECK,
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errfunc, pglob);
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if (status == GLOB_NOMATCH)
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/* No matches in this directory. Try the next. */
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continue;
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if (status != 0)
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{
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globfree (&dirs);
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globfree (pglob);
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return status;
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}
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/* Stick the directory on the front of each name. */
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if (prefix_array(dirs.gl_pathv[i],
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&pglob->gl_pathv[oldcount],
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pglob->gl_pathc - oldcount))
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{
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globfree (&dirs);
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globfree (pglob);
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return GLOB_NOSPACE;
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}
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}
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if (pglob->gl_pathc == oldcount)
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/* No matches. */
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if (flags & GLOB_NOCHECK)
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{
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CONST size_t len = strlen (pattern) + 1;
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char *patcopy = (char *) malloc (len);
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if (patcopy == NULL)
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return GLOB_NOSPACE;
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memcpy (patcopy, pattern, len);
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pglob->gl_pathv
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= (char **) realloc(pglob->gl_pathv,
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(pglob->gl_pathc +
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((flags & GLOB_DOOFFS) ?
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pglob->gl_offs : 0) +
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1 + 1) *
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sizeof(char *));
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if (pglob->gl_pathv == NULL)
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{
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free (patcopy);
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return GLOB_NOSPACE;
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}
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if (flags & GLOB_DOOFFS)
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while (pglob->gl_pathc < pglob->gl_offs)
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pglob->gl_pathv[pglob->gl_pathc++] = NULL;
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pglob->gl_pathv[pglob->gl_pathc++] = patcopy;
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return 0;
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}
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else
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return GLOB_NOMATCH;
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}
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else
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{
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status = glob_in_dir(filename, dirname, flags, errfunc, pglob);
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if (status != 0)
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return status;
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if (dirlen > 0)
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{
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/* Stick the directory on the front of each name. */
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if (prefix_array(dirname,
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&pglob->gl_pathv[oldcount],
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pglob->gl_pathc - oldcount))
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{
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globfree (pglob);
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return GLOB_NOSPACE;
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}
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}
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}
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if (!(flags & GLOB_NOSORT))
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qsort((PTR) &pglob->gl_pathv[oldcount], pglob->gl_pathc - oldcount,
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sizeof(char *), collated_compare);
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return 0;
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}
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/* Free storage allocated in PGLOB by a previous `glob' call. */
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void
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DEFUN(globfree, (pglob), register glob_t *pglob)
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{
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if (pglob->gl_pathv != NULL)
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{
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register int i;
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for (i = 0; i < pglob->gl_pathc; ++i)
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if (pglob->gl_pathv[i] != NULL)
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free((PTR) pglob->gl_pathv[i]);
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free((PTR) pglob->gl_pathv);
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}
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}
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/* Do a collated comparison of A and B. */
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static int
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DEFUN(collated_compare, (a, b), CONST PTR a AND CONST PTR b)
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{
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CONST char *CONST s1 = *(CONST char *CONST *CONST) a;
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CONST char *CONST s2 = *(CONST char *CONST *CONST) b;
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if (s1 == s2)
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return 0;
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if (s1 == NULL)
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return 1;
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if (s2 == NULL)
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return -1;
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return strcoll (s1, s2);
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}
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/* Prepend PREFIX to each of N members of ARRAY, replacing ARRAY's
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elements in place. Return nonzero if out of memory, zero if successful.
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A slash is inserted between PREFIX and each elt of ARRAY.
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Each old element of ARRAY is freed. */
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static int
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DEFUN(prefix_array, (prefix, array, n),
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CONST char *prefix AND char **array AND CONST size_t n)
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{
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register size_t i;
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CONST size_t prelen = strlen(prefix);
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for (i = 0; i < n; ++i)
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{
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CONST size_t eltlen = strlen(array[i]) + 1;
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char *new = (char *) malloc(prelen + 1 + eltlen);
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if (new == NULL)
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{
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while (i > 0)
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free((PTR) array[--i]);
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return 1;
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}
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memcpy(new, prefix, prelen);
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new[prelen] = '/';
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memcpy(&new[prelen + 1], array[i], eltlen);
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free((PTR) array[i]);
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array[i] = new;
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}
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return 0;
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}
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/* Return nonzero if PATTERN contains any metacharacters.
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Metacharacters can be quoted with backslashes if QUOTE is nonzero. */
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static int
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DEFUN(glob_pattern_p, (pattern, quote),
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CONST char *pattern AND CONST int quote)
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{
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register CONST char *p;
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int open = 0;
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for (p = pattern; *p != '\0'; ++p)
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switch (*p)
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{
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case '?':
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case '*':
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return 1;
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case '\\':
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if (quote)
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++p;
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break;
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case '[':
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open = 1;
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break;
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case ']':
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if (open)
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return 1;
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break;
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}
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return 0;
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}
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/* Like `glob', but PATTERN is a final pathname component,
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and matches are searched for in DIRECTORY.
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The GLOB_NOSORT bit in FLAGS is ignored. No sorting is ever done.
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The GLOB_APPEND flag is assumed to be set (always appends). */
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static int
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DEFUN(glob_in_dir, (pattern, directory, flags, errfunc, pglob),
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CONST char *pattern AND CONST char *directory AND int flags AND
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int EXFUN((*errfunc), (CONST char *, int)) AND glob_t *pglob)
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{
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register DIR *stream;
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register struct dirent *d;
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struct globlink
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{
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struct globlink *next;
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char *name;
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};
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struct globlink *names = NULL;
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size_t nfound = 0;
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if (!glob_pattern_p (pattern, !(flags & GLOB_NOESCAPE)))
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{
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stream = NULL;
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flags |= GLOB_NOCHECK;
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}
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else
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{
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stream = opendir(directory);
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if (stream == NULL)
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{
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if ((errfunc != NULL && (*errfunc)(directory, errno)) ||
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(flags & GLOB_ERR))
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return GLOB_ABEND;
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}
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else
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while ((d = readdir(stream)) != NULL)
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if (REAL_DIR_ENTRY (d) &&
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fnmatch(pattern, d->d_name,
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(!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
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((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)) == 0)
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{
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struct globlink *new = (struct globlink *)
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__alloca(sizeof (struct globlink));
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size_t len = D_NAMLEN (d);
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new->name = (char *) malloc(len +
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((flags & GLOB_MARK) ? 1 : 0) + 1);
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if (new->name == NULL)
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goto memory_error;
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memcpy ((PTR) new->name, d->d_name, len);
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if (flags & GLOB_MARK)
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new->name[len++] = '/';
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new->name[len] = '\0';
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new->next = names;
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names = new;
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++nfound;
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}
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}
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if (nfound == 0 && (flags & GLOB_NOCHECK))
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{
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size_t len = strlen (pattern);
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nfound = 1;
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names = (struct globlink *) __alloca (sizeof (struct globlink));
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names->next = NULL;
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names->name = (char *) malloc (len + ((flags & GLOB_MARK) ? 1 : 0) + 1);
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if (names->name == NULL)
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goto memory_error;
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memcpy (names->name, pattern, len);
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if (flags & GLOB_MARK)
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names->name[len++] = '/';
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names->name[len] = '\0';
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}
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pglob->gl_pathv
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= (char **) realloc(pglob->gl_pathv,
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(pglob->gl_pathc +
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((flags & GLOB_DOOFFS) ? pglob->gl_offs : 0) +
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nfound + 1) *
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sizeof(char *));
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if (pglob->gl_pathv == NULL)
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goto memory_error;
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if (flags & GLOB_DOOFFS)
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while (pglob->gl_pathc < pglob->gl_offs)
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pglob->gl_pathv[pglob->gl_pathc++] = NULL;
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for (; names != NULL; names = names->next)
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pglob->gl_pathv[pglob->gl_pathc++] = names->name;
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pglob->gl_pathv[pglob->gl_pathc] = NULL;
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if (stream != NULL)
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{
|
||
int save = errno;
|
||
(void) closedir (stream);
|
||
errno = save;
|
||
}
|
||
return nfound == 0 ? GLOB_NOMATCH : 0;
|
||
|
||
memory_error:
|
||
{
|
||
int save = errno;
|
||
(void) closedir (stream);
|
||
errno = save;
|
||
}
|
||
while (names != NULL)
|
||
{
|
||
if (names->name != NULL)
|
||
free((PTR) names->name);
|
||
names = names->next;
|
||
}
|
||
return GLOB_NOSPACE;
|
||
}
|