718 lines
17 KiB
C
718 lines
17 KiB
C
/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Guido van Rossum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)glob.c 5.12 (Berkeley) 6/24/91";
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#endif /* LIBC_SCCS and not lint */
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/*
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* Glob: the interface is a superset of the one defined in POSIX 1003.2,
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* draft 9.
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*
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* The [!...] convention to negate a range is supported (SysV, Posix, ksh).
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*
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* Optional extra services, controlled by flags not defined by POSIX:
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*
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* GLOB_QUOTE:
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* Escaping convention: \ inhibits any special meaning the following
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* character might have (except \ at end of string is retained).
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* GLOB_MAGCHAR:
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* Set in gl_flags if pattern contained a globbing character.
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* GLOB_ALTNOT:
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* Use ^ instead of ! for "not".
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* gl_matchc:
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* Number of matches in the current invocation of glob.
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*/
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#ifdef WINNT_NATIVE
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#pragma warning(disable:4244)
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#endif /* WINNT_NATIVE */
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#define Char __Char
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#include "sh.h"
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#include "glob.h"
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#undef Char
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#undef QUOTE
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#undef TILDE
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#undef META
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#undef ismeta
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#undef Strchr
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#ifndef S_ISDIR
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#define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
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#endif
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#if !defined(S_ISLNK) && defined(S_IFLNK)
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#define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
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#endif
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#if !defined(S_ISLNK) && !defined(lstat)
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#define lstat stat
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#endif
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typedef unsigned short Char;
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static int glob1 (Char *, glob_t *, int);
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static int glob2 (struct strbuf *, const Char *, glob_t *, int);
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static int glob3 (struct strbuf *, const Char *, const Char *,
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glob_t *, int);
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static void globextend (const char *, glob_t *);
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static int match (const char *, const Char *, const Char *,
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int);
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static int compare (const void *, const void *);
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static DIR *Opendir (const char *);
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#ifdef S_IFLNK
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static int Lstat (const char *, struct stat *);
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#endif
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static int Stat (const char *, struct stat *sb);
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static Char *Strchr (Char *, int);
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#ifdef DEBUG
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static void qprintf (const Char *);
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#endif
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#define DOLLAR '$'
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#define DOT '.'
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#define EOS '\0'
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#define LBRACKET '['
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#define NOT '!'
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#define ALTNOT '^'
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#define QUESTION '?'
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#define QUOTE '\\'
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#define RANGE '-'
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#define RBRACKET ']'
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#define SEP '/'
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#define STAR '*'
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#define TILDE '~'
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#define UNDERSCORE '_'
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#define M_META 0x8000
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#define M_PROTECT 0x4000
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#define M_MASK 0xffff
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#define M_ASCII 0x00ff
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#define LCHAR(c) ((c)&M_ASCII)
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#define META(c) ((c)|M_META)
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#define M_ALL META('*')
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#define M_END META(']')
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#define M_NOT META('!')
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#define M_ALTNOT META('^')
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#define M_ONE META('?')
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#define M_RNG META('-')
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#define M_SET META('[')
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#define ismeta(c) (((c)&M_META) != 0)
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int
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globcharcoll(__Char c1, __Char c2, int cs)
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{
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#if defined(NLS) && defined(LC_COLLATE) && defined(HAVE_STRCOLL)
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# if defined(WIDE_STRINGS)
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wchar_t s1[2], s2[2];
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if (c1 == c2)
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return (0);
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if (cs) {
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c1 = towlower(c1);
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c2 = towlower(c2);
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} else {
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/* This should not be here, but I'll rather leave it in than engage in
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a LC_COLLATE flamewar about a shell I don't use... */
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if (iswlower(c1) && iswupper(c2))
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return (1);
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if (iswupper(c1) && iswlower(c2))
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return (-1);
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}
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s1[0] = c1;
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s2[0] = c2;
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s1[1] = s2[1] = '\0';
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return wcscoll(s1, s2);
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# else /* not WIDE_STRINGS */
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char s1[2], s2[2];
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if (c1 == c2)
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return (0);
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/*
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* From kevin lyda <kevin@suberic.net>:
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* strcoll does not guarantee case sorting, so we pre-process now:
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*/
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if (cs) {
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c1 = islower(c1) ? c1 : tolower(c1);
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c2 = islower(c2) ? c2 : tolower(c2);
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} else {
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if (islower(c1) && isupper(c2))
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return (1);
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if (isupper(c1) && islower(c2))
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return (-1);
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}
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s1[0] = c1;
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s2[0] = c2;
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s1[1] = s2[1] = '\0';
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return strcoll(s1, s2);
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# endif
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#else
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return (c1 - c2);
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#endif
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}
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/*
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* Need to dodge two kernel bugs:
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* opendir("") != opendir(".")
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* NAMEI_BUG: on plain files trailing slashes are ignored in some kernels.
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* POSIX specifies that they should be ignored in directories.
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*/
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static DIR *
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Opendir(const char *str)
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{
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#if defined(hpux) || defined(__hpux)
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struct stat st;
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#endif
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if (!*str)
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return (opendir("."));
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#if defined(hpux) || defined(__hpux)
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/*
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* Opendir on some device files hangs, so avoid it
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*/
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if (stat(str, &st) == -1 || !S_ISDIR(st.st_mode))
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return NULL;
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#endif
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return opendir(str);
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}
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#ifdef S_IFLNK
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static int
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Lstat(const char *fn, struct stat *sb)
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{
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int st;
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st = lstat(fn, sb);
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# ifdef NAMEI_BUG
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if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
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st = -1;
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# endif /* NAMEI_BUG */
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return st;
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}
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#else
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#define Lstat Stat
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#endif /* S_IFLNK */
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static int
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Stat(const char *fn, struct stat *sb)
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{
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int st;
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st = stat(fn, sb);
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#ifdef NAMEI_BUG
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if (*fn != 0 && strend(fn)[-1] == '/' && !S_ISDIR(sb->st_mode))
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st = -1;
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#endif /* NAMEI_BUG */
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return st;
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}
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static Char *
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Strchr(Char *str, int ch)
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{
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do
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if (*str == ch)
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return (str);
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while (*str++);
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return (NULL);
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}
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#ifdef DEBUG
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static void
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qprintf(const Char *s)
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{
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const Char *p;
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for (p = s; *p; p++)
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printf("%c", *p & 0xff);
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printf("\n");
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for (p = s; *p; p++)
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printf("%c", *p & M_PROTECT ? '"' : ' ');
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printf("\n");
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for (p = s; *p; p++)
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printf("%c", *p & M_META ? '_' : ' ');
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printf("\n");
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}
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#endif /* DEBUG */
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static int
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compare(const void *p, const void *q)
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{
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#if defined(NLS) && defined(HAVE_STRCOLL)
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return (strcoll(*(char *const *) p, *(char *const *) q));
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#else
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return (strcmp(*(char *const *) p, *(char *const *) q));
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#endif /* NLS && HAVE_STRCOLL */
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}
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/*
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* The main glob() routine: compiles the pattern (optionally processing
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* quotes), calls glob1() to do the real pattern matching, and finally
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* sorts the list (unless unsorted operation is requested). Returns 0
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* if things went well, nonzero if errors occurred. It is not an error
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* to find no matches.
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*/
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int
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glob(const char *pattern, int flags, int (*errfunc) (const char *, int),
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glob_t *pglob)
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{
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int err, oldpathc;
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Char *bufnext, m_not;
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const unsigned char *patnext;
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int c, not;
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Char *qpatnext, *patbuf;
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int no_match;
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patnext = (const unsigned char *) pattern;
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if (!(flags & GLOB_APPEND)) {
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pglob->gl_pathc = 0;
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pglob->gl_pathv = NULL;
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if (!(flags & GLOB_DOOFFS))
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pglob->gl_offs = 0;
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}
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pglob->gl_flags = flags & ~GLOB_MAGCHAR;
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pglob->gl_errfunc = errfunc;
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oldpathc = pglob->gl_pathc;
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pglob->gl_matchc = 0;
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if (pglob->gl_flags & GLOB_ALTNOT) {
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not = ALTNOT;
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m_not = M_ALTNOT;
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}
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else {
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not = NOT;
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m_not = M_NOT;
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}
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patbuf = xmalloc((strlen(pattern) + 1) * sizeof(*patbuf));
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bufnext = patbuf;
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no_match = *patnext == not;
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if (no_match)
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patnext++;
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if (flags & GLOB_QUOTE) {
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/* Protect the quoted characters */
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while ((c = *patnext++) != EOS) {
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#ifdef WIDE_STRINGS
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int len;
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len = mblen((const char *)(patnext - 1), MB_LEN_MAX);
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if (len == -1)
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mblen(NULL, 0);
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if (len > 1) {
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*bufnext++ = (Char) c;
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while (--len != 0)
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*bufnext++ = (Char) (*patnext++ | M_PROTECT);
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} else
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#endif /* WIDE_STRINGS */
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if (c == QUOTE) {
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if ((c = *patnext++) == EOS) {
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c = QUOTE;
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--patnext;
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}
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*bufnext++ = (Char) (c | M_PROTECT);
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}
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else
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*bufnext++ = (Char) c;
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}
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}
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else
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while ((c = *patnext++) != EOS)
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*bufnext++ = (Char) c;
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*bufnext = EOS;
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bufnext = patbuf;
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qpatnext = patbuf;
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while ((c = *qpatnext++) != EOS) {
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switch (c) {
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case LBRACKET:
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c = *qpatnext;
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if (c == not)
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++qpatnext;
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if (*qpatnext == EOS ||
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Strchr(qpatnext + 1, RBRACKET) == NULL) {
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*bufnext++ = LBRACKET;
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if (c == not)
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--qpatnext;
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break;
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}
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pglob->gl_flags |= GLOB_MAGCHAR;
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*bufnext++ = M_SET;
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if (c == not)
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*bufnext++ = m_not;
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c = *qpatnext++;
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do {
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*bufnext++ = LCHAR(c);
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if (*qpatnext == RANGE &&
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(c = qpatnext[1]) != RBRACKET) {
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*bufnext++ = M_RNG;
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*bufnext++ = LCHAR(c);
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qpatnext += 2;
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}
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} while ((c = *qpatnext++) != RBRACKET);
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*bufnext++ = M_END;
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break;
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case QUESTION:
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pglob->gl_flags |= GLOB_MAGCHAR;
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*bufnext++ = M_ONE;
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break;
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case STAR:
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pglob->gl_flags |= GLOB_MAGCHAR;
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/* collapse adjacent stars to one, to avoid
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* exponential behavior
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*/
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if (bufnext == patbuf || bufnext[-1] != M_ALL)
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*bufnext++ = M_ALL;
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break;
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default:
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*bufnext++ = LCHAR(c);
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break;
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}
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}
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*bufnext = EOS;
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#ifdef DEBUG
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qprintf(patbuf);
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#endif
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if ((err = glob1(patbuf, pglob, no_match)) != 0) {
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xfree(patbuf);
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return (err);
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}
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/*
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* If there was no match we are going to append the pattern
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* if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
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* and the pattern did not contain any magic characters
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* GLOB_NOMAGIC is there just for compatibility with csh.
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*/
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if (pglob->gl_pathc == oldpathc &&
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((flags & GLOB_NOCHECK) ||
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((flags & GLOB_NOMAGIC) && !(pglob->gl_flags & GLOB_MAGCHAR)))) {
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if (!(flags & GLOB_QUOTE))
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globextend(pattern, pglob);
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else {
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char *copy, *dest;
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const char *src;
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/* copy pattern, interpreting quotes */
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copy = xmalloc(strlen(pattern) + 1);
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dest = copy;
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src = pattern;
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while (*src != EOS) {
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if (*src == QUOTE) {
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if (*++src == EOS)
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--src;
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}
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*dest++ = *src++;
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}
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*dest = EOS;
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globextend(copy, pglob);
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xfree(copy);
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}
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xfree(patbuf);
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return 0;
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}
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else if (!(flags & GLOB_NOSORT) && (pglob->gl_pathc != oldpathc))
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qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
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pglob->gl_pathc - oldpathc, sizeof(char *), compare);
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xfree(patbuf);
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return (0);
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}
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static int
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glob1(Char *pattern, glob_t *pglob, int no_match)
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{
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struct strbuf pathbuf = strbuf_INIT;
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int err;
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/*
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* a null pathname is invalid -- POSIX 1003.1 sect. 2.4.
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*/
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if (*pattern == EOS)
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return (0);
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err = glob2(&pathbuf, pattern, pglob, no_match);
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xfree(pathbuf.s);
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return err;
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}
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/*
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* functions glob2 and glob3 are mutually recursive; there is one level
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* of recursion for each segment in the pattern that contains one or
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* more meta characters.
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*/
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static int
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glob2(struct strbuf *pathbuf, const Char *pattern, glob_t *pglob, int no_match)
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{
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struct stat sbuf;
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int anymeta;
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const Char *p;
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size_t orig_len;
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/*
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* loop over pattern segments until end of pattern or until segment with
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* meta character found.
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*/
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anymeta = 0;
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for (;;) {
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if (*pattern == EOS) { /* end of pattern? */
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strbuf_terminate(pathbuf);
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if (Lstat(pathbuf->s, &sbuf))
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return (0);
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if (((pglob->gl_flags & GLOB_MARK) &&
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pathbuf->s[pathbuf->len - 1] != SEP) &&
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(S_ISDIR(sbuf.st_mode)
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#ifdef S_IFLNK
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|| (S_ISLNK(sbuf.st_mode) &&
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(Stat(pathbuf->s, &sbuf) == 0) &&
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S_ISDIR(sbuf.st_mode))
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#endif
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)) {
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strbuf_append1(pathbuf, SEP);
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strbuf_terminate(pathbuf);
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}
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++pglob->gl_matchc;
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globextend(pathbuf->s, pglob);
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return 0;
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}
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/* find end of next segment, tentatively copy to pathbuf */
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p = pattern;
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orig_len = pathbuf->len;
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while (*p != EOS && *p != SEP) {
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if (ismeta(*p))
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anymeta = 1;
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strbuf_append1(pathbuf, *p++);
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}
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if (!anymeta) { /* no expansion, do next segment */
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pattern = p;
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while (*pattern == SEP)
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strbuf_append1(pathbuf, *pattern++);
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}
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else { /* need expansion, recurse */
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pathbuf->len = orig_len;
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return (glob3(pathbuf, pattern, p, pglob, no_match));
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}
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}
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/* NOTREACHED */
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}
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static int
|
|
glob3(struct strbuf *pathbuf, const Char *pattern, const Char *restpattern,
|
|
glob_t *pglob, int no_match)
|
|
{
|
|
DIR *dirp;
|
|
struct dirent *dp;
|
|
int err;
|
|
Char m_not = (pglob->gl_flags & GLOB_ALTNOT) ? M_ALTNOT : M_NOT;
|
|
size_t orig_len;
|
|
|
|
strbuf_terminate(pathbuf);
|
|
errno = 0;
|
|
|
|
if (!(dirp = Opendir(pathbuf->s))) {
|
|
/* todo: don't call for ENOENT or ENOTDIR? */
|
|
if ((pglob->gl_errfunc && (*pglob->gl_errfunc) (pathbuf->s, errno)) ||
|
|
(pglob->gl_flags & GLOB_ERR))
|
|
return (GLOB_ABEND);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
orig_len = pathbuf->len;
|
|
/* search directory for matching names */
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
/* initial DOT must be matched literally */
|
|
if (dp->d_name[0] == DOT && *pattern != DOT)
|
|
continue;
|
|
pathbuf->len = orig_len;
|
|
strbuf_append(pathbuf, dp->d_name);
|
|
strbuf_terminate(pathbuf);
|
|
if (match(pathbuf->s + orig_len, pattern, restpattern, (int) m_not)
|
|
== no_match)
|
|
continue;
|
|
err = glob2(pathbuf, restpattern, pglob, no_match);
|
|
if (err)
|
|
break;
|
|
}
|
|
/* todo: check error from readdir? */
|
|
closedir(dirp);
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Extend the gl_pathv member of a glob_t structure to accomodate a new item,
|
|
* add the new item, and update gl_pathc.
|
|
*
|
|
* This assumes the BSD realloc, which only copies the block when its size
|
|
* crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
|
|
* behavior.
|
|
*
|
|
* Return 0 if new item added, error code if memory couldn't be allocated.
|
|
*
|
|
* Invariant of the glob_t structure:
|
|
* Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
|
|
* gl_pathv points to (gl_offs + gl_pathc + 1) items.
|
|
*/
|
|
static void
|
|
globextend(const char *path, glob_t *pglob)
|
|
{
|
|
char **pathv;
|
|
int i;
|
|
size_t newsize;
|
|
|
|
newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
|
|
pathv = xrealloc(pglob->gl_pathv, newsize);
|
|
|
|
if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
|
|
/* first time around -- clear initial gl_offs items */
|
|
pathv += pglob->gl_offs;
|
|
for (i = pglob->gl_offs; --i >= 0;)
|
|
*--pathv = NULL;
|
|
}
|
|
pglob->gl_pathv = pathv;
|
|
|
|
pathv[pglob->gl_offs + pglob->gl_pathc++] = strsave(path);
|
|
pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
|
|
}
|
|
|
|
static size_t
|
|
One_Char_mbtowc(__Char *pwc, const Char *s, size_t n)
|
|
{
|
|
#ifdef WIDE_STRINGS
|
|
char buf[MB_LEN_MAX], *p;
|
|
|
|
if (n > MB_LEN_MAX)
|
|
n = MB_LEN_MAX;
|
|
p = buf;
|
|
while (p < buf + n && (*p++ = LCHAR(*s++)) != 0)
|
|
;
|
|
return one_mbtowc(pwc, buf, n);
|
|
#else
|
|
*pwc = *s & CHAR;
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* pattern matching function for filenames. Each occurrence of the *
|
|
* pattern causes a recursion level.
|
|
*/
|
|
static int
|
|
match(const char *name, const Char *pat, const Char *patend, int m_not)
|
|
{
|
|
int ok, negate_range;
|
|
Char c;
|
|
|
|
while (pat < patend) {
|
|
size_t lwk;
|
|
__Char wc, wk;
|
|
|
|
c = *pat; /* Only for M_MASK bits */
|
|
pat += One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
|
|
lwk = one_mbtowc(&wk, name, MB_LEN_MAX);
|
|
switch (c & M_MASK) {
|
|
case M_ALL:
|
|
if (pat == patend)
|
|
return (1);
|
|
for (;;) {
|
|
if (match(name, pat, patend, m_not))
|
|
return (1);
|
|
if (*name == EOS)
|
|
break;
|
|
name += lwk;
|
|
lwk = one_mbtowc(&wk, name, MB_LEN_MAX);
|
|
}
|
|
return (0);
|
|
case M_ONE:
|
|
if (*name == EOS)
|
|
return (0);
|
|
name += lwk;
|
|
break;
|
|
case M_SET:
|
|
ok = 0;
|
|
if (*name == EOS)
|
|
return (0);
|
|
name += lwk;
|
|
if ((negate_range = ((*pat & M_MASK) == m_not)) != 0)
|
|
++pat;
|
|
while ((*pat & M_MASK) != M_END) {
|
|
pat += One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
|
|
if ((*pat & M_MASK) == M_RNG) {
|
|
__Char wc2;
|
|
|
|
pat++;
|
|
pat += One_Char_mbtowc(&wc2, pat, MB_LEN_MAX);
|
|
if (globcharcoll(wc, wk, 0) <= 0 &&
|
|
globcharcoll(wk, wc2, 0) <= 0)
|
|
ok = 1;
|
|
} else if (wc == wk)
|
|
ok = 1;
|
|
}
|
|
pat += One_Char_mbtowc(&wc, pat, MB_LEN_MAX);
|
|
if (ok == negate_range)
|
|
return (0);
|
|
break;
|
|
default:
|
|
name += lwk;
|
|
if (samecase(wk) != samecase(wc))
|
|
return (0);
|
|
break;
|
|
}
|
|
}
|
|
return (*name == EOS);
|
|
}
|
|
|
|
/* free allocated data belonging to a glob_t structure */
|
|
void
|
|
globfree(glob_t *pglob)
|
|
{
|
|
int i;
|
|
char **pp;
|
|
|
|
if (pglob->gl_pathv != NULL) {
|
|
pp = pglob->gl_pathv + pglob->gl_offs;
|
|
for (i = pglob->gl_pathc; i--; ++pp)
|
|
if (*pp)
|
|
xfree(*pp), *pp = NULL;
|
|
xfree(pglob->gl_pathv), pglob->gl_pathv = NULL;
|
|
}
|
|
}
|