Replace the current implementations of ftw() and nftw() with the OpenBSD
implementations written by Todd C. Miller. These are cleaner, less buggy and actively maintained.
This commit is contained in:
parent
aaa7f2858e
commit
e1bcce4f46
137
include/ftw.h
137
include/ftw.h
@ -1,107 +1,62 @@
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/* $OpenBSD: ftw.h,v 1.1 2003/07/21 21:13:18 millert Exp $ */
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/*
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* Copyright (c) 2003 by Joel Baker.
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* All rights reserved.
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* Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
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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 Author nor the names of any 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 AUTHOR 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 AUTHOR 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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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*
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* $FreeBSD$
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*/
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#ifndef _FTW_H
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#define _FTW_H
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#ifndef _FTW_H
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#define _FTW_H
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#include <sys/types.h>
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#include <sys/stat.h>
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__BEGIN_DECLS
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/*
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* Valid flags for the 3rd argument to the function that is passed as the
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* second argument to ftw(3) and nftw(3). Say it three times fast!
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*/
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#define FTW_F 0 /* File. */
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#define FTW_D 1 /* Directory. */
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#define FTW_DNR 2 /* Directory without read permission. */
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#define FTW_DP 3 /* Directory with subdirectories visited. */
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#define FTW_NS 4 /* Unknown type; stat() failed. */
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#define FTW_SL 5 /* Symbolic link. */
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#define FTW_SLN 6 /* Sym link that names a nonexistent file. */
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/* Enumerated values for 'flag' when calling [n]ftw */
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enum {
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FTW_D, /* Directories */
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FTW_DNR, /* Unreadable directory */
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FTW_F, /* Regular files */
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FTW_SL, /* Symbolic link */
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FTW_NS, /* stat(2) failed */
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#if __XSI_VISIBLE /* X/Open */
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/* Flags for nftw only */
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FTW_DP, /* Directory, subdirs visited */
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FTW_SLN, /* Dangling symlink */
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#endif /* __XSI_VISIBLE */
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};
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#if __XSI_VISIBLE /* X/Open */
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/* Enumerated values for 'flags' when calling nftw */
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enum {
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FTW_CHDIR = 1, /* Do a chdir(2) when entering a directory */
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FTW_DEPTH = 2, /* Report files first (before directory) */
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FTW_MOUNT = 4, /* Single filesystem */
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FTW_PHYS = 8 /* Physical walk; ignore symlinks */
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};
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#define FTW_PHYS FTW_PHYS
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#define FTW_MOUNT FTW_MOUNT
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#define FTW_CHDIR FTW_CHDIR
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#define FTW_DEPTH FTW_DEPTH
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/* FTW struct for callbacks from nftw */
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/*
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* Flags for use as the 4th argument to nftw(3). These may be ORed together.
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*/
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#define FTW_PHYS 0x01 /* Physical walk, don't follow sym links. */
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#define FTW_MOUNT 0x02 /* The walk does not cross a mount point. */
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#define FTW_DEPTH 0x04 /* Subdirs visited before the dir itself. */
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#define FTW_CHDIR 0x08 /* Change to a directory before reading it. */
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struct FTW {
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int base;
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int level;
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int base;
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int level;
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};
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#endif /* __XSI_VISIBLE */
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/* Typecasts for callback functions */
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typedef int (*__ftw_func_t) \
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(const char *file, const struct stat *status, int flag);
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/* ftw: walk a directory tree, calling a function for each element */
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extern int ftw (const char *dir, __ftw_func_t func, int descr);
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#if __XSI_VISIBLE /* X/Open */
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typedef int (*__nftw_func_t) \
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(const char *file, const struct stat *status, int flag, struct FTW *detail);
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/* nftw: walk a directory tree, calling a function for each element; much
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* like ftw, but with behavior flags and minty freshness.
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*/
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extern int nftw (const char *dir, __nftw_func_t func, int descr, int flags);
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#endif /* __XSI_VISIBLE */
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__BEGIN_DECLS
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int ftw(const char *, int (*)(const char *, const struct stat *, int), int);
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int nftw(const char *, int (*)(const char *, const struct stat *, int,
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struct FTW *), int, int);
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__END_DECLS
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#endif /* _FTW_H */
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#endif /* !_FTW_H */
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@ -18,7 +18,7 @@ SRCS+= __xuname.c _pthread_stubs.c _rand48.c _spinlock_stub.c _thread_init.c \
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getpeereid.c getprogname.c getpwent.c getttyent.c \
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getusershell.c getvfsbyname.c glob.c \
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initgroups.c isatty.c isinf.c isnan.c jrand48.c lcong48.c \
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lockf.c lrand48.c mrand48.c nice.c \
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lockf.c lrand48.c mrand48.c nftw.c nice.c \
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nlist.c nrand48.c ntp_gettime.c opendir.c \
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pause.c pmadvise.c popen.c posixshm.c pselect.c \
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psignal.c pw_scan.c pwcache.c \
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@ -1,200 +1,98 @@
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/* $OpenBSD: ftw.c,v 1.4 2004/07/07 16:05:23 millert Exp $ */
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/*
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* Copyright (c) 2003 by Joel Baker.
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* All rights reserved.
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* Copyright (c) 2003, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
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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 Author nor the names of any 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 AUTHOR 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 AUTHOR 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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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* $FreeBSD$
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include <sys/types.h> /* Because fts(3) says so */
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#if 0
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$OpenBSD: ftw.c,v 1.4 2004/07/07 16:05:23 millert Exp $";
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#endif /* LIBC_SCCS and not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fts.h>
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#include <ftw.h>
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#include <limits.h>
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#include <unistd.h> /* We want strcpy */
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int
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ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
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int nfds)
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{
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char * const paths[2] = { (char *)path, NULL };
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FTSENT *cur;
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FTS *ftsp;
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int error = 0, fnflag, sverrno;
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#include <errno.h> /* Because errno is our friend */
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/* XXX - nfds is currently unused */
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if (nfds < 1 || nfds > OPEN_MAX) {
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errno = EINVAL;
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return (-1);
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}
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#include "ftw.h"
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/* I like symbolic values - this is only used in this file. */
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enum __ftw_modes {
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MODE_FTW,
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MODE_NFTW
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};
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/* Prototype this so that we can have it later */
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static int __ftw_core(const char *, void (*)(), int, int, enum __ftw_modes);
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/*
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* The external function calls are really just wrappers around __ftw_core,
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* since the work they do is 90% the same.
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*/
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int ftw (const char *dir, __ftw_func_t func, int descr) {
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return __ftw_core(dir, (void (*)())func, descr, 0, MODE_FTW);
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}
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int nftw (const char *dir, __nftw_func_t func, int descr, int flags) {
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return __ftw_core(dir, (void (*)())func, descr, flags, MODE_NFTW);
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}
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/*
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typedef int (*__ftw_func_t) \
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(const char *file, const struct stat status, int flag);
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typedef int (*__nftw_func_t) \
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(const char *file, const struct stat status, int flag, struct FTW detail);
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*/
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static int __ftw_core(const char *dir, void (*func)(), int descr, int flags,
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enum __ftw_modes mode) {
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FTS *hierarchy;
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FTSENT *entry;
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int fts_options;
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const char *paths[2];
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int ftw_flag, func_ret;
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struct FTW ftw_st;
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__ftw_func_t ftw_func;
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__nftw_func_t nftw_func;
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int saved_errno;
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errno = 0;
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/* We need at least one descriptor to call fts */
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if (descr < 1) {
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errno = EINVAL;
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return -1;
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}
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/* Decide which mode we're running in, and set the FTS options suitably. */
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if (MODE_NFTW == mode) { /* NFTW mode, with all the bells and whistles. */
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fts_options = (flags & FTW_PHYS) ? FTS_PHYSICAL : FTS_LOGICAL;
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fts_options |= (flags & FTW_CHDIR) ? 0 : FTS_NOCHDIR;
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fts_options |= (flags & FTW_MOUNT) ? FTS_XDEV : 0;
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} else { /* We must be in FTW mode. Nothing else makes sense. */
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fts_options = FTS_LOGICAL;
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}
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/* FTW gets a const char *, but FTS expects a null-term array of them. */
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paths[0] = dir;
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paths[1] = NULL;
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/* Open the file hierarchy. */
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if (!(hierarchy = fts_open((char * const *)paths, fts_options, NULL))) {
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if (EACCES == errno) {
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return 0;
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} else {
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return -1;
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}
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}
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/* The main loop. Is it not nifty? Worship the loop. */
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while ((entry = fts_read(hierarchy))) {
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switch (entry->fts_info) {
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case FTS_D:
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if ((MODE_NFTW != mode) || !(flags & FTW_DEPTH)) {
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ftw_flag = FTW_D;
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}
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break;
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case FTS_DNR:
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ftw_flag = FTW_DNR;
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break;
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case FTS_F:
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ftw_flag = FTW_F;
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break;
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case FTS_SL:
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ftw_flag = FTW_SL;
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break;
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case FTS_NS:
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ftw_flag = FTW_NS;
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break;
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/* Values that should only occur in nftw mode */
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case FTS_SLNONE:
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if (MODE_NFTW == mode) {
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ftw_flag = FTW_SLN;
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} else {
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ftw_flag = FTW_SL;
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}
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break;
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case FTS_DP:
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if ((MODE_NFTW == mode) && (flags & FTW_DEPTH)) {
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ftw_flag = FTW_D;
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}
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break;
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default:
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/* I'm not sure this is right, but we don't have a valid FTW
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* type to call with, so cowardice seems the better part of
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* guessing.
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*/
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break;
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}
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if (MODE_FTW == mode) {
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ftw_func = (__ftw_func_t) func;
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func_ret = (*ftw_func)
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(entry->fts_path, entry->fts_statp, ftw_flag);
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} else if (MODE_NFTW == mode) {
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ftw_st.base = (entry->fts_pathlen - entry->fts_namelen);
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ftw_st.level = entry->fts_level;
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nftw_func = (__nftw_func_t) func;
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func_ret = (*nftw_func)
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(entry->fts_path, entry->fts_statp, ftw_flag, &ftw_st);
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}
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if (0 != func_ret) {
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saved_errno = errno;
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fts_close(hierarchy);
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errno = saved_errno;
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return func_ret;
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}
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}
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/* The janitors will be upset if we don't clean up after ourselves. */
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saved_errno = errno;
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fts_close(hierarchy);
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if (0 != saved_errno) { /* fts_read returned NULL, and set errno - bail */
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errno = saved_errno;
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}
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return errno ? -1 : 0;
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ftsp = fts_open(paths, FTS_LOGICAL | FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
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if (ftsp == NULL)
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return (-1);
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while ((cur = fts_read(ftsp)) != NULL) {
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switch (cur->fts_info) {
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case FTS_D:
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fnflag = FTW_D;
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break;
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case FTS_DNR:
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fnflag = FTW_DNR;
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break;
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case FTS_DP:
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/* we only visit in preorder */
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continue;
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case FTS_F:
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case FTS_DEFAULT:
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fnflag = FTW_F;
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break;
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case FTS_NS:
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case FTS_NSOK:
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case FTS_SLNONE:
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fnflag = FTW_NS;
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break;
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case FTS_SL:
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fnflag = FTW_SL;
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break;
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case FTS_DC:
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errno = ELOOP;
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/* FALLTHROUGH */
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default:
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error = -1;
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goto done;
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}
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error = fn(cur->fts_path, cur->fts_statp, fnflag);
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if (error != 0)
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break;
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}
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done:
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sverrno = errno;
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if (fts_close(ftsp) != 0 && error == 0)
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error = -1;
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else
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errno = sverrno;
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return (error);
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}
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|
117
lib/libc/gen/nftw.c
Normal file
117
lib/libc/gen/nftw.c
Normal file
@ -0,0 +1,117 @@
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/* $OpenBSD: nftw.c,v 1.4 2004/07/07 16:05:23 millert Exp $ */
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/*
|
||||
* Copyright (c) 2003, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*
|
||||
* Sponsored in part by the Defense Advanced Research Projects
|
||||
* Agency (DARPA) and Air Force Research Laboratory, Air Force
|
||||
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
|
||||
*/
|
||||
|
||||
#if 0
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
static const char rcsid[] = "$OpenBSD: nftw.c,v 1.4 2004/07/07 16:05:23 millert Exp $";
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
#endif
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <errno.h>
|
||||
#include <fts.h>
|
||||
#include <ftw.h>
|
||||
#include <limits.h>
|
||||
|
||||
int
|
||||
nftw(const char *path, int (*fn)(const char *, const struct stat *, int,
|
||||
struct FTW *), int nfds, int ftwflags)
|
||||
{
|
||||
char * const paths[2] = { (char *)path, NULL };
|
||||
struct FTW ftw;
|
||||
FTSENT *cur;
|
||||
FTS *ftsp;
|
||||
int error = 0, ftsflags, fnflag, postorder, sverrno;
|
||||
|
||||
/* XXX - nfds is currently unused */
|
||||
if (nfds < 1 || nfds > OPEN_MAX) {
|
||||
errno = EINVAL;
|
||||
return (-1);
|
||||
}
|
||||
|
||||
ftsflags = FTS_COMFOLLOW;
|
||||
if (!(ftwflags & FTW_CHDIR))
|
||||
ftsflags |= FTS_NOCHDIR;
|
||||
if (ftwflags & FTW_MOUNT)
|
||||
ftsflags |= FTS_XDEV;
|
||||
if (ftwflags & FTW_PHYS)
|
||||
ftsflags |= FTS_PHYSICAL;
|
||||
else
|
||||
ftsflags |= FTS_LOGICAL;
|
||||
postorder = (ftwflags & FTW_DEPTH) != 0;
|
||||
ftsp = fts_open(paths, ftsflags, NULL);
|
||||
if (ftsp == NULL)
|
||||
return (-1);
|
||||
while ((cur = fts_read(ftsp)) != NULL) {
|
||||
switch (cur->fts_info) {
|
||||
case FTS_D:
|
||||
if (postorder)
|
||||
continue;
|
||||
fnflag = FTW_D;
|
||||
break;
|
||||
case FTS_DNR:
|
||||
fnflag = FTW_DNR;
|
||||
break;
|
||||
case FTS_DP:
|
||||
if (!postorder)
|
||||
continue;
|
||||
fnflag = FTW_DP;
|
||||
break;
|
||||
case FTS_F:
|
||||
case FTS_DEFAULT:
|
||||
fnflag = FTW_F;
|
||||
break;
|
||||
case FTS_NS:
|
||||
case FTS_NSOK:
|
||||
fnflag = FTW_NS;
|
||||
break;
|
||||
case FTS_SL:
|
||||
fnflag = FTW_SL;
|
||||
break;
|
||||
case FTS_SLNONE:
|
||||
fnflag = FTW_SLN;
|
||||
break;
|
||||
case FTS_DC:
|
||||
errno = ELOOP;
|
||||
/* FALLTHROUGH */
|
||||
default:
|
||||
error = -1;
|
||||
goto done;
|
||||
}
|
||||
ftw.base = cur->fts_pathlen - cur->fts_namelen;
|
||||
ftw.level = cur->fts_level;
|
||||
error = fn(cur->fts_path, cur->fts_statp, fnflag, &ftw);
|
||||
if (error != 0)
|
||||
break;
|
||||
}
|
||||
done:
|
||||
sverrno = errno;
|
||||
if (fts_close(ftsp) != 0 && error == 0)
|
||||
error = -1;
|
||||
else
|
||||
errno = sverrno;
|
||||
return (error);
|
||||
}
|
Loading…
Reference in New Issue
Block a user