abacbbbf01
goes to a fair degree of trouble to enable something like this to be safe: cd /tmp && find . -mtime +7 -delete It removes both files and directories. It does not attempt to remove immutable files (an earlier version I showed to a few people did a chflags and tried to blow away even immutable files. Too risky..) It is thought to be safe because it forces the fts(3) driven descent to only do "minimal risk" stuff. specifically, -follow is disabled, it does checking to see that it chdir'ed to the directory it thought it was going to, it will *not* pass a pathname with a '/' character in it to unlink(), so it should be totally immune to symlink tree races. If it runs into something "fishy", it bails out rather than blunder ahead.. It's better to do that if somebody is trying to compromise security rather than risk giving them an opportunity. Since the unlink()/rmdir() is being called from within the current working directory during the tree descent, there are no fork/exec overheads or races. As a side effect of this paranoia, you cannot do a "find /somewhere/dir -delete", as the last argument to rmdir() is "/somewhere/dir", and the checking won't allow it. Besides, one would use rm -rf for that case anyway. :-) Reviewed by: pst (some time ago, but I've removed the immutable file deletion code that he complained about since he last saw it)
81 lines
3.1 KiB
C
81 lines
3.1 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)extern.h 8.3 (Berkeley) 4/16/94
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*/
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#include <sys/cdefs.h>
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void brace_subst __P((char *, char **, char *, int));
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void *emalloc __P((unsigned int));
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PLAN *find_create __P((char ***));
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int find_execute __P((PLAN *, char **));
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PLAN *find_formplan __P((char **));
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PLAN *not_squish __P((PLAN *));
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PLAN *or_squish __P((PLAN *));
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PLAN *paren_squish __P((PLAN *));
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struct stat;
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void printlong __P((char *, char *, struct stat *));
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int queryuser __P((char **));
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PLAN *c_atime __P((char *));
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PLAN *c_ctime __P((char *));
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PLAN *c_delete __P((void));
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PLAN *c_depth __P((void));
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PLAN *c_exec __P((char ***, int));
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PLAN *c_follow __P((void));
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PLAN *c_fstype __P((char *));
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PLAN *c_group __P((char *));
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PLAN *c_inum __P((char *));
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PLAN *c_links __P((char *));
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PLAN *c_ls __P((void));
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PLAN *c_name __P((char *));
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PLAN *c_newer __P((char *));
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PLAN *c_nogroup __P((void));
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PLAN *c_nouser __P((void));
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PLAN *c_path __P((char *));
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PLAN *c_perm __P((char *));
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PLAN *c_print __P((void));
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PLAN *c_print0 __P((void));
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PLAN *c_prune __P((void));
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PLAN *c_size __P((char *));
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PLAN *c_type __P((char *));
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PLAN *c_user __P((char *));
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PLAN *c_xdev __P((void));
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PLAN *c_openparen __P((void));
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PLAN *c_closeparen __P((void));
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PLAN *c_mtime __P((char *));
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PLAN *c_not __P((void));
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PLAN *c_or __P((void));
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extern int ftsoptions, isdeprecated, isdepth, isoutput, isxargs;
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