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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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741 lines
18 KiB
C
741 lines
18 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 notdef
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <ctype.h>
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typedef void * ptr_t;
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#endif
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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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#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 CHAR
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#undef ismeta
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#undef Strchr
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#include "glob.h"
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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 __P((Char *, glob_t *, int));
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static int glob2 __P((Char *, Char *, Char *, glob_t *, int));
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static int glob3 __P((Char *, Char *, Char *, Char *,
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glob_t *, int));
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static int globextend __P((Char *, glob_t *));
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static int match __P((Char *, Char *, Char *, int));
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#ifndef __clipper__
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static int compare __P((const ptr_t, const ptr_t));
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#endif
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static DIR *Opendir __P((Char *));
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#ifdef S_IFLNK
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static int Lstat __P((Char *, struct stat *));
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#endif
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static int Stat __P((Char *, struct stat *sb));
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static Char *Strchr __P((Char *, int));
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#ifdef DEBUG
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static void qprintf __P((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 CHAR(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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#ifndef BUFSIZE
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#define GLOBBUFLEN MAXPATHLEN
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#else
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#define GLOBBUFLEN BUFSIZE
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#endif
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int
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globcharcoll(c1, c2)
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int c1, c2;
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{
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#if defined(NLS) && defined(LC_COLLATE) && !defined(NOSTRCOLL)
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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 (islower(c1) && isupper(c2))
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return (1);
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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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#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(str)
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register Char *str;
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{
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char buf[GLOBBUFLEN];
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register char *dc = buf;
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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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while ((*dc++ = *str++) != '\0')
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continue;
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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(buf, &st) == -1 || !S_ISDIR(st.st_mode))
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return NULL;
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#endif
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return (opendir(buf));
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}
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#ifdef S_IFLNK
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static int
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Lstat(fn, sb)
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register Char *fn;
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struct stat *sb;
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{
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char buf[GLOBBUFLEN];
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register char *dc = buf;
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while ((*dc++ = *fn++) != '\0')
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continue;
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# ifdef NAMEI_BUG
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{
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int st;
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st = lstat(buf, sb);
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if (*buf)
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dc--;
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return (*--dc == '/' && !S_ISDIR(sb->st_mode) ? -1 : st);
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}
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# else
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return (lstat(buf, sb));
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# endif /* NAMEI_BUG */
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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(fn, sb)
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register Char *fn;
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struct stat *sb;
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{
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char buf[GLOBBUFLEN];
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register char *dc = buf;
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while ((*dc++ = *fn++) != '\0')
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continue;
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#ifdef NAMEI_BUG
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{
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int st;
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st = stat(buf, sb);
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if (*buf)
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dc--;
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return (*--dc == '/' && !S_ISDIR(sb->st_mode) ? -1 : st);
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}
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#else
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return (stat(buf, sb));
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#endif /* NAMEI_BUG */
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}
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static Char *
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Strchr(str, ch)
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Char *str;
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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(s)
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Char *s;
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{
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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(p, q)
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const ptr_t p, q;
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{
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#if defined(NLS) && !defined(NOSTRCOLL)
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errno = 0; /* strcoll sets errno, another brain-damage */
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return (strcoll(*(char **) p, *(char **) q));
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#else
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return (strcmp(*(char **) p, *(char **) q));
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#endif /* NLS && !NOSTRCOLL */
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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(pattern, flags, errfunc, pglob)
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const char *pattern;
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int flags;
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int (*errfunc) __P((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, *bufend, *compilebuf, m_not;
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const unsigned char *compilepat, *patnext;
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int c, not;
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Char patbuf[GLOBBUFLEN + 1], *qpatnext;
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int no_match;
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patnext = (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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bufnext = patbuf;
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bufend = bufnext + GLOBBUFLEN;
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compilebuf = bufnext;
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compilepat = patnext;
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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 (bufnext < bufend && (c = *patnext++) != EOS)
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#ifdef DSPMBYTE
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if (Ismbyte1(c) && *patnext != EOS)
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{
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*bufnext++ = (Char) c;
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*bufnext++ = (Char) *patnext++;
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}
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else
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#endif /* DSPMBYTE */
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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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else
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while (bufnext < bufend && (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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/* we don't need to check for buffer overflow any more */
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while ((c = *qpatnext++) != EOS) {
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#ifdef DSPMBYTE
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if (Ismbyte1(c) && *qpatnext != EOS)
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{
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*bufnext++ = CHAR(c);
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*bufnext++ = CHAR(*qpatnext++);
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}
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else
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#endif /* DSPMBYTE */
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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++ = CHAR(c);
|
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if (*qpatnext == RANGE &&
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(c = qpatnext[1]) != RBRACKET) {
|
|
*bufnext++ = M_RNG;
|
|
*bufnext++ = CHAR(c);
|
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qpatnext += 2;
|
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}
|
|
} while ((c = *qpatnext++) != RBRACKET);
|
|
*bufnext++ = M_END;
|
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break;
|
|
case QUESTION:
|
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pglob->gl_flags |= GLOB_MAGCHAR;
|
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*bufnext++ = M_ONE;
|
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break;
|
|
case STAR:
|
|
pglob->gl_flags |= GLOB_MAGCHAR;
|
|
/* collapse adjacent stars to one, to avoid
|
|
* exponential behavior
|
|
*/
|
|
if (bufnext == patbuf || bufnext[-1] != M_ALL)
|
|
*bufnext++ = M_ALL;
|
|
break;
|
|
default:
|
|
*bufnext++ = CHAR(c);
|
|
break;
|
|
}
|
|
}
|
|
*bufnext = EOS;
|
|
#ifdef DEBUG
|
|
qprintf(patbuf);
|
|
#endif
|
|
|
|
if ((err = glob1(patbuf, pglob, no_match)) != 0)
|
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return (err);
|
|
|
|
/*
|
|
* If there was no match we are going to append the pattern
|
|
* if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
|
|
* and the pattern did not contain any magic characters
|
|
* GLOB_NOMAGIC is there just for compatibility with csh.
|
|
*/
|
|
if (pglob->gl_pathc == oldpathc &&
|
|
((flags & GLOB_NOCHECK) ||
|
|
((flags & GLOB_NOMAGIC) && !(pglob->gl_flags & GLOB_MAGCHAR)))) {
|
|
if (!(flags & GLOB_QUOTE)) {
|
|
Char *dp = compilebuf;
|
|
const unsigned char *sp = compilepat;
|
|
|
|
while ((*dp++ = *sp++) != '\0')
|
|
continue;
|
|
}
|
|
else {
|
|
/*
|
|
* copy pattern, interpreting quotes; this is slightly different
|
|
* than the interpretation of quotes above -- which should prevail?
|
|
*/
|
|
while (*compilepat != EOS) {
|
|
if (*compilepat == QUOTE) {
|
|
if (*++compilepat == EOS)
|
|
--compilepat;
|
|
}
|
|
*compilebuf++ = (unsigned char) *compilepat++;
|
|
}
|
|
*compilebuf = EOS;
|
|
}
|
|
return (globextend(patbuf, pglob));
|
|
}
|
|
else if (!(flags & GLOB_NOSORT) && (pglob->gl_pathc != oldpathc))
|
|
qsort((char *) (pglob->gl_pathv + pglob->gl_offs + oldpathc),
|
|
pglob->gl_pathc - oldpathc, sizeof(char *),
|
|
(int (*) __P((const void *, const void *))) compare);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
glob1(pattern, pglob, no_match)
|
|
Char *pattern;
|
|
glob_t *pglob;
|
|
int no_match;
|
|
{
|
|
Char pathbuf[GLOBBUFLEN + 1];
|
|
|
|
/*
|
|
* a null pathname is invalid -- POSIX 1003.1 sect. 2.4.
|
|
*/
|
|
if (*pattern == EOS)
|
|
return (0);
|
|
return (glob2(pathbuf, pathbuf, pattern, pglob, no_match));
|
|
}
|
|
|
|
/*
|
|
* functions glob2 and glob3 are mutually recursive; there is one level
|
|
* of recursion for each segment in the pattern that contains one or
|
|
* more meta characters.
|
|
*/
|
|
static int
|
|
glob2(pathbuf, pathend, pattern, pglob, no_match)
|
|
Char *pathbuf, *pathend, *pattern;
|
|
glob_t *pglob;
|
|
int no_match;
|
|
{
|
|
struct stat sbuf;
|
|
int anymeta;
|
|
Char *p, *q;
|
|
|
|
/*
|
|
* loop over pattern segments until end of pattern or until segment with
|
|
* meta character found.
|
|
*/
|
|
anymeta = 0;
|
|
for (;;) {
|
|
if (*pattern == EOS) { /* end of pattern? */
|
|
*pathend = EOS;
|
|
|
|
if (Lstat(pathbuf, &sbuf))
|
|
return (0);
|
|
|
|
if (((pglob->gl_flags & GLOB_MARK) &&
|
|
pathend[-1] != SEP) &&
|
|
(S_ISDIR(sbuf.st_mode)
|
|
#ifdef S_IFLNK
|
|
|| (S_ISLNK(sbuf.st_mode) &&
|
|
(Stat(pathbuf, &sbuf) == 0) &&
|
|
S_ISDIR(sbuf.st_mode))
|
|
#endif
|
|
)) {
|
|
*pathend++ = SEP;
|
|
*pathend = EOS;
|
|
}
|
|
++pglob->gl_matchc;
|
|
return (globextend(pathbuf, pglob));
|
|
}
|
|
|
|
/* find end of next segment, copy tentatively to pathend */
|
|
q = pathend;
|
|
p = pattern;
|
|
while (*p != EOS && *p != SEP) {
|
|
if (ismeta(*p))
|
|
anymeta = 1;
|
|
*q++ = *p++;
|
|
}
|
|
|
|
if (!anymeta) { /* no expansion, do next segment */
|
|
pathend = q;
|
|
pattern = p;
|
|
while (*pattern == SEP)
|
|
*pathend++ = *pattern++;
|
|
}
|
|
else /* need expansion, recurse */
|
|
return (glob3(pathbuf, pathend, pattern, p, pglob, no_match));
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
|
|
static int
|
|
glob3(pathbuf, pathend, pattern, restpattern, pglob, no_match)
|
|
Char *pathbuf, *pathend, *pattern, *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;
|
|
char cpathbuf[GLOBBUFLEN], *ptr;;
|
|
|
|
*pathend = EOS;
|
|
errno = 0;
|
|
|
|
if (!(dirp = Opendir(pathbuf))) {
|
|
/* todo: don't call for ENOENT or ENOTDIR? */
|
|
for (ptr = cpathbuf; (*ptr++ = (char) *pathbuf++) != EOS;)
|
|
continue;
|
|
if ((pglob->gl_errfunc && (*pglob->gl_errfunc) (cpathbuf, errno)) ||
|
|
(pglob->gl_flags & GLOB_ERR))
|
|
return (GLOB_ABEND);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
/* search directory for matching names */
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
register unsigned char *sc;
|
|
register Char *dc;
|
|
|
|
/* initial DOT must be matched literally */
|
|
if (dp->d_name[0] == DOT && *pattern != DOT)
|
|
continue;
|
|
for (sc = (unsigned char *) dp->d_name, dc = pathend;
|
|
(*dc++ = *sc++) != '\0';)
|
|
continue;
|
|
if (match(pathend, pattern, restpattern, (int) m_not) == no_match) {
|
|
*pathend = EOS;
|
|
continue;
|
|
}
|
|
err = glob2(pathbuf, --dc, restpattern, pglob, no_match);
|
|
if (err)
|
|
break;
|
|
}
|
|
/* todo: check error from readdir? */
|
|
(void) 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 int
|
|
globextend(path, pglob)
|
|
Char *path;
|
|
glob_t *pglob;
|
|
{
|
|
register char **pathv;
|
|
register int i;
|
|
unsigned int newsize;
|
|
char *copy;
|
|
Char *p;
|
|
|
|
newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
|
|
pathv = (char **) (pglob->gl_pathv ?
|
|
xrealloc((ptr_t) pglob->gl_pathv, (size_t) newsize) :
|
|
xmalloc((size_t) newsize));
|
|
if (pathv == NULL)
|
|
return (GLOB_NOSPACE);
|
|
|
|
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;
|
|
|
|
for (p = path; *p++;)
|
|
continue;
|
|
if ((copy = (char *) xmalloc((size_t) (p - path))) != NULL) {
|
|
register char *dc = copy;
|
|
register Char *sc = path;
|
|
|
|
while ((*dc++ = *sc++) != '\0')
|
|
continue;
|
|
pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
|
|
}
|
|
pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
|
|
return ((copy == NULL) ? GLOB_NOSPACE : 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* pattern matching function for filenames. Each occurrence of the *
|
|
* pattern causes a recursion level.
|
|
*/
|
|
static int
|
|
match(name, pat, patend, m_not)
|
|
register Char *name, *pat, *patend;
|
|
int m_not;
|
|
{
|
|
int ok, negate_range;
|
|
Char c, k;
|
|
|
|
while (pat < patend) {
|
|
c = *pat++;
|
|
switch (c & M_MASK) {
|
|
case M_ALL:
|
|
if (pat == patend)
|
|
return (1);
|
|
do
|
|
if (match(name, pat, patend, m_not))
|
|
return (1);
|
|
while (*name++ != EOS);
|
|
return (0);
|
|
case M_ONE:
|
|
if (*name++ == EOS)
|
|
return (0);
|
|
break;
|
|
case M_SET:
|
|
ok = 0;
|
|
if ((k = *name++) == EOS)
|
|
return (0);
|
|
if ((negate_range = ((*pat & M_MASK) == m_not)) != 0)
|
|
++pat;
|
|
while (((c = *pat++) & M_MASK) != M_END) {
|
|
if ((*pat & M_MASK) == M_RNG) {
|
|
if (globcharcoll(CHAR(c), CHAR(k)) <= 0 &&
|
|
globcharcoll(CHAR(k), CHAR(pat[1])) <= 0)
|
|
ok = 1;
|
|
pat += 2;
|
|
}
|
|
else if (c == k)
|
|
ok = 1;
|
|
}
|
|
if (ok == negate_range)
|
|
return (0);
|
|
break;
|
|
default:
|
|
k = *name++;
|
|
if (samecase(k) != samecase(c))
|
|
return (0);
|
|
break;
|
|
}
|
|
}
|
|
return (*name == EOS);
|
|
}
|
|
|
|
/* free allocated data belonging to a glob_t structure */
|
|
void
|
|
globfree(pglob)
|
|
glob_t *pglob;
|
|
{
|
|
register int i;
|
|
register char **pp;
|
|
|
|
if (pglob->gl_pathv != NULL) {
|
|
pp = pglob->gl_pathv + pglob->gl_offs;
|
|
for (i = pglob->gl_pathc; i--; ++pp)
|
|
if (*pp)
|
|
xfree((ptr_t) *pp), *pp = NULL;
|
|
xfree((ptr_t) pglob->gl_pathv), pglob->gl_pathv = NULL;
|
|
}
|
|
}
|