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/* $OpenBSD: rm.c,v 1.8 2016/10/10 18:07:03 tedu Exp $ */
/* $NetBSD: rm.c,v 1.19 1995/09/07 06:48:50 jtc Exp $ */
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <pwd.h>
#include <grp.h>
#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
extern char *__progname;
static int eval, stdin_ok;
static void checkdot(char **);
static void rm_tree(char **);
static void __dead
usage(void)
{
(void)fprintf(stderr, "usage: %s [-dfiPRr] file ...\n", __progname);
exit(1);
}
/*
* rm --
* This rm is different from historic rm's, but is expected to match
* POSIX 1003.2 behavior. The most visible difference is that -f
* has two specific effects now, ignore non-existent files and force
* file removal.
*/
int
rmmain(int argc, char *argv[])
{
checkdot(argv);
if (*argv) {
stdin_ok = isatty(STDIN_FILENO);
rm_tree(argv);
}
return (eval);
}
static void
rm_tree(char **argv)
{
FTS *fts;
FTSENT *p;
int flags;
/*
* If the -i option is specified, the user can skip on the pre-order
* visit. The fts_number field flags skipped directories.
*/
#define SKIPPED 1
flags = FTS_PHYSICAL;
flags |= FTS_NOSTAT;
if (!(fts = fts_open(argv, flags, NULL)))
err(1, NULL);
while ((p = fts_read(fts)) != NULL) {
switch (p->fts_info) {
case FTS_DNR:
if (p->fts_errno != ENOENT) {
warnx("%s: %s",
p->fts_path, strerror(p->fts_errno));
eval = 1;
}
continue;
case FTS_ERR:
errc(1, p->fts_errno, "%s", p->fts_path);
case FTS_NS:
/*
* FTS_NS: assume that if can't stat the file, it
* can't be unlinked.
*/
break;
case FTS_D:
/* Pre-order: give user chance to skip. */
continue;
case FTS_DP:
/* Post-order: see if user skipped. */
if (p->fts_number == SKIPPED)
continue;
break;
default:
break;
}
/*
* If we can't read or search the directory, may still be
* able to remove it. Don't print out the un{read,search}able
* message unless the remove fails.
*/
switch (p->fts_info) {
case FTS_DP:
case FTS_DNR:
if (!rmdir(p->fts_accpath) ||
(errno == ENOENT))
continue;
break;
case FTS_F:
case FTS_NSOK:
default:
if (!unlink(p->fts_accpath) ||
(errno == ENOENT))
continue;
}
warn("%s", p->fts_path);
eval = 1;
}
if (errno)
err(1, "fts_read");
fts_close(fts);
}
/*
* POSIX.2 requires that if "." or ".." are specified as the basename
* portion of an operand, a diagnostic message be written to standard
* error and nothing more be done with such operands.
*
* Since POSIX.2 defines basename as the final portion of a path after
* trailing slashes have been removed, we'll remove them here.
*/
#define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
static void
checkdot(char **argv)
{
char *p, **save, **t;
int complained;
complained = 0;
for (t = argv; *t;) {
/* strip trailing slashes */
p = strrchr (*t, '\0');
while (--p > *t && *p == '/')
*p = '\0';
/* extract basename */
if ((p = strrchr(*t, '/')) != NULL)
++p;
else
p = *t;
if (ISDOT(p)) {
if (!complained++)
warnx("\".\" and \"..\" may not be removed");
eval = 1;
for (save = t; (t[0] = t[1]) != NULL; ++t)
continue;
t = save;
} else
++t;
}
}
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