#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1990, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
#if 0
static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
#else
static const char rcsid[] =
"$FreeBSD: src/bin/rm/rm.c,v 1.33 2001/06/13 15:01:25 ru Exp $";
#endif
#endif
#include <sys/stat.h>
#include <sys/param.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 <sysexits.h>
#include <unistd.h>
#ifdef __APPLE__
#include <pwd.h>
#include <grp.h>
#include "get_compat.h"
#else
#define COMPAT_MODE(func, mode) 1
#endif
int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
uid_t uid;
int check __P((char *, char *, struct stat *));
int checkdir __P((char *));
int yes_or_no __P((void));
void checkdot __P((char **));
void rm_file __P((char **));
void rm_overwrite __P((char *, struct stat *));
void rm_tree __P((char **));
void usage __P((void));
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, rflag;
char *p;
if (argc < 1)
usage();
if ((p = rindex(argv[0], '/')) == NULL)
p = argv[0];
else
++p;
if (strcmp(p, "unlink") == 0) {
if (argc == 2) {
rm_file(&argv[1]);
exit(eval);
} else
usage();
}
Pflag = rflag = 0;
while ((ch = getopt(argc, argv, "dfiPRrvW")) != -1)
switch(ch) {
case 'd':
dflag = 1;
break;
case 'f':
fflag = 1;
iflag = 0;
break;
case 'i':
fflag = 0;
iflag = 1;
break;
case 'P':
Pflag = 1;
break;
case 'R':
case 'r':
rflag = 1;
break;
case 'v':
vflag = 1;
break;
case 'W':
Wflag = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1) {
if (fflag)
return 0;
usage();
}
checkdot(argv);
uid = geteuid();
if (*argv) {
stdin_ok = isatty(STDIN_FILENO);
if (rflag)
rm_tree(argv);
else
rm_file(argv);
}
exit (eval);
}
void
rm_tree(argv)
char **argv;
{
FTS *fts;
FTSENT *p;
int needstat;
int flags;
int rval;
int wantConformance = COMPAT_MODE("bin/rm", "unix2003");
needstat = !uid || (!fflag && !iflag && stdin_ok);
#define SKIPPED 1
flags = FTS_PHYSICAL;
if (!needstat)
flags |= FTS_NOSTAT;
if (Wflag)
flags |= FTS_WHITEOUT;
if (!(fts = fts_open(argv, flags, NULL))) {
if (fflag && errno == ENOENT)
return;
err(1, NULL);
}
while ((p = fts_read(fts)) != NULL) {
switch (p->fts_info) {
case FTS_DNR:
if (!fflag || p->fts_errno != ENOENT) {
warnx("%s: %s",
p->fts_path, strerror(p->fts_errno));
eval = 1;
}
continue;
case FTS_ERR:
errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
case FTS_NS:
if (!needstat)
break;
if (!fflag || p->fts_errno != ENOENT) {
warnx("%s: %s",
p->fts_path, strerror(p->fts_errno));
eval = 1;
}
continue;
case FTS_D:
if (!fflag &&
( (wantConformance && !checkdir(p->fts_path)) ||
(!wantConformance && !check(p->fts_path, p->fts_accpath, p->fts_statp))
)
){
(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:
if(p->fts_number == SKIPPED)
continue;
else if(wantConformance)
{
if(fflag || check(p->fts_path, p->fts_accpath, p->fts_statp))
break;
else
continue;
}
break;
default:
if (!fflag &&
!check(p->fts_path, p->fts_accpath, p->fts_statp))
continue;
}
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 == 0) {
switch (p->fts_info) {
case FTS_DP:
case FTS_DNR:
rval = rmdir(p->fts_accpath);
if (rval == 0 || (fflag && errno == ENOENT)) {
if (rval == 0 && vflag)
(void)printf("%s\n",
p->fts_path);
continue;
}
break;
case FTS_W:
rval = undelete(p->fts_accpath);
if (rval == 0 && (fflag && errno == ENOENT)) {
if (vflag)
(void)printf("%s\n",
p->fts_path);
continue;
}
break;
default:
if (Pflag)
rm_overwrite(p->fts_accpath, NULL);
rval = unlink(p->fts_accpath);
if (rval == 0 || (fflag && errno == ENOENT)) {
if (rval == 0 && vflag)
(void)printf("%s\n",
p->fts_path);
continue;
}
}
}
err:
warn("%s", p->fts_path);
eval = 1;
}
if (errno)
err(1, "fts_read");
fts_close(fts);
}
void
rm_file(argv)
char **argv;
{
struct stat sb;
int rval;
char *f;
while ((f = *argv++) != NULL) {
if (lstat(f, &sb)) {
if (Wflag) {
sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
} else {
if (!fflag || errno != ENOENT) {
warn("%s", f);
eval = 1;
}
continue;
}
} else if (Wflag) {
warnx("%s: %s", f, strerror(EEXIST));
eval = 1;
continue;
}
if (S_ISDIR(sb.st_mode) && !dflag) {
warnx("%s: is a directory", f);
eval = 1;
continue;
}
if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
continue;
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 == 0) {
if (S_ISWHT(sb.st_mode))
rval = undelete(f);
else 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);
eval = 1;
}
if (vflag && rval == 0)
(void)printf("%s\n", f);
}
}
void
rm_overwrite(file, sbp)
char *file;
struct stat *sbp;
{
struct stat sb;
struct statfs fsb;
off_t len;
int bsize, fd, wlen;
char *buf = NULL;
fd = -1;
if (sbp == NULL) {
if (lstat(file, &sb))
goto err;
sbp = &sb;
}
if (!S_ISREG(sbp->st_mode))
return;
if ((fd = open(file, O_WRONLY, 0)) == -1)
goto err;
if (fstatfs(fd, &fsb) == -1)
goto err;
bsize = MAX(fsb.f_iosize, 1024);
if ((buf = malloc(bsize)) == NULL)
err(1, "malloc");
#define PASS(byte) { \
memset(buf, byte, bsize); \
for (len = sbp->st_size; len > 0; len -= wlen) { \
wlen = len < bsize ? len : bsize; \
if (write(fd, buf, wlen) != wlen) \
goto err; \
} \
}
PASS(0xff);
if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
goto err;
PASS(0x00);
if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
goto err;
PASS(0xff);
if (!fsync(fd) && !close(fd)) {
free(buf);
return;
}
err: eval = 1;
if (buf)
free(buf);
warn("%s", file);
}
int
yes_or_no()
{
int ch, first;
(void)fflush(stderr);
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
return (first == 'y' || first == 'Y');
}
int
checkdir(path)
char *path;
{
if(!iflag)
return 1; (void)fprintf(stderr, "examine files in directory %s? ", path);
return yes_or_no();
}
int
check(path, name, sp)
char *path, *name;
struct stat *sp;
{
char modep[15], *flagsp;
if (iflag)
(void)fprintf(stderr, "remove %s? ", path);
else {
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);
if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
err(1, NULL);
(void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
modep + 1, modep[9] == ' ' ? "" : " ",
user_from_uid(sp->st_uid, 0),
group_from_gid(sp->st_gid, 0),
*flagsp ? flagsp : "", *flagsp ? " " : "",
path);
free(flagsp);
}
return yes_or_no();
}
#define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
void
checkdot(argv)
char **argv;
{
char *p, **save, **t;
int complained;
complained = 0;
for (t = argv; *t;) {
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;
}
}
void
usage()
{
(void)fprintf(stderr, "%s\n%s\n",
"usage: rm [-f | -i] [-dPRrvW] file ...",
" unlink file");
exit(EX_USAGE);
}