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Allow root to delete uchg/uappnd files

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This commit is contained in:
ache 1995-04-13 13:35:09 +00:00
parent fdacac9026
commit bf4c9aa148
2 changed files with 68 additions and 30 deletions
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5
bin/rm/Makefile
View File

@ -1,6 +1,9 @@
# @(#)Makefile 8.1 (Berkeley) 5/31/93
# $Id$
# $Id: Makefile,v 1.2 1994/09/24 02:56:59 davidg Exp $
PROG= rm
SRCS= rm.c stat_flags.c
.PATH: ${.CURDIR}/../ls
.include <bsd.prog.mk>

93
bin/rm/rm.c
View File

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: rm.c,v 1.5 1994/09/24 02:57:02 davidg Exp $
*/
#ifndef lint
@ -55,7 +55,10 @@ static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
#include <string.h>
#include <unistd.h>
extern char *flags_to_string __P((u_long, char *));
int dflag, eval, fflag, iflag, Pflag, stdin_ok;
uid_t uid;
int check __P((char *, char *, struct stat *));
void checkdot __P((char **));
@ -114,6 +117,7 @@ main(argc, argv)
exit (eval);
stdin_ok = isatty(STDIN_FILENO);
uid = geteuid();
if (rflag)
rm_tree(argv);
@ -129,12 +133,13 @@ rm_tree(argv)
FTS *fts;
FTSENT *p;
int needstat;
int rval;
/*
* Remove a file hierarchy. If forcing removal (-f), or interactive
* (-i) or can't ask anyway (stdin_ok), don't stat the file.
*/
needstat = !fflag && !iflag && stdin_ok;
needstat = !uid || !fflag && !iflag && stdin_ok;
/*
* If the -i option is specified, the user can skip on the pre-order
@ -177,6 +182,12 @@ rm_tree(argv)
(void)fts_set(fts, p, FTS_SKIP);
p->fts_number = SKIPPED;
}
else if (!uid &&
(p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
!(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
chflags(p->fts_accpath,
p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
goto err;
continue;
case FTS_DP:
/* Post-order: see if user skipped. */
@ -188,25 +199,34 @@ rm_tree(argv)
!check(p->fts_path, p->fts_accpath, p->fts_statp))
continue;
/*
* 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.
*/
if (p->fts_info == FTS_DP || p->fts_info == FTS_DNR) {
if (!rmdir(p->fts_accpath))
continue;
if (errno == ENOENT) {
if (fflag)
rval = 0;
if (!uid &&
(p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
!(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
rval = chflags(p->fts_accpath,
p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
if (!rval) {
/*
* 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.
*/
if (p->fts_info == FTS_DP || p->fts_info == FTS_DNR) {
if (!rmdir(p->fts_accpath))
continue;
} else if (p->fts_info != FTS_DP)
warnx("%s: unable to read", p->fts_path);
} else {
if (Pflag)
rm_overwrite(p->fts_accpath, NULL);
if (!unlink(p->fts_accpath) || (fflag && errno == ENOENT))
continue;
if (errno == ENOENT) {
if (fflag)
continue;
} else if (p->fts_info != FTS_DP)
warnx("%s: unable to read", p->fts_path);
} else {
if (Pflag)
rm_overwrite(p->fts_accpath, NULL);
if (!unlink(p->fts_accpath) || (fflag && errno == ENOENT))
continue;
}
}
err:
warn("%s", p->fts_path);
eval = 1;
}
@ -243,12 +263,19 @@ rm_file(argv)
}
if (!fflag && !check(f, f, &sb))
continue;
if (S_ISDIR(sb.st_mode))
rval = rmdir(f);
else {
if (Pflag)
rm_overwrite(f, &sb);
rval = unlink(f);
rval = 0;
if (!uid &&
(sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
!(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
if (!rval) {
if (S_ISDIR(sb.st_mode))
rval = rmdir(f);
else {
if (Pflag)
rm_overwrite(f, &sb);
rval = unlink(f);
}
}
if (rval && (!fflag || errno != ENOENT)) {
warn("%s", f);
@ -318,7 +345,7 @@ check(path, name, sp)
struct stat *sp;
{
int ch, first;
char modep[15];
char modep[15], flagsp[128];
/* Check -i first. */
if (iflag)
@ -330,13 +357,21 @@ check(path, name, sp)
* because their permissions are meaningless. Check stdin_ok
* first because we may not have stat'ed the file.
*/
if (!stdin_ok || S_ISLNK(sp->st_mode) || !access(name, W_OK))
if (!stdin_ok || S_ISLNK(sp->st_mode) ||
!access(name, W_OK) &&
!(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
(!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid))
return (1);
strmode(sp->st_mode, modep);
(void)fprintf(stderr, "override %s%s%s/%s for %s? ",
strcpy(flagsp, flags_to_string(sp->st_flags, NULL));
if (*flagsp)
strcat(flagsp, " ");
(void)fprintf(stderr, "override %s%s%s/%s %sfor %s? ",
modep + 1, modep[9] == ' ' ? "" : " ",
user_from_uid(sp->st_uid, 0),
group_from_gid(sp->st_gid, 0), path);
group_from_gid(sp->st_gid, 0),
*flagsp ? flagsp : "",
path);
}
(void)fflush(stderr);