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freebsd-skq/sbin/fsdb/fsdb.c
Joerg Wunsch 36b8baa315 Implement a -r option to fsdb(8), ``read/only''.
1997-04-15 09:02:48 +00:00

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/* $NetBSD: fsdb.c,v 1.2 1995/10/08 23:18:10 thorpej Exp $ */
/*
* Copyright (c) 1995 John T. Kohl
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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.
*/
#ifndef lint
static char rcsid[] = "$Id: fsdb.c,v 1.7 1997/03/13 12:44:51 peter Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <ctype.h>
#include <fcntl.h>
#include <grp.h>
#include <histedit.h>
#include <limits.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include "fsdb.h"
#include "fsck.h"
extern char *__progname; /* from crt0.o */
void usage __P((void));
int cmdloop __P((void));
void
usage()
{
errx(1, "usage: %s [-d] [-r] -f <fsname>", __progname);
}
int returntosingle = 0;
char nflag = 0;
/*
* We suck in lots of fsck code, and just pick & choose the stuff we want.
*
* fsreadfd is set up to read from the file system, fswritefd to write to
* the file system.
*/
void
main(argc, argv)
int argc;
char *argv[];
{
int ch, rval;
char *fsys = NULL;
struct stat stb;
while (-1 != (ch = getopt(argc, argv, "f:dr"))) {
switch (ch) {
case 'f':
fsys = optarg;
break;
case 'd':
debug++;
break;
case 'r':
nflag++; /* "no" in fsck, readonly for us */
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (fsys == NULL) {
if (argc != 1)
usage();
else
fsys = argv[0];
}
if (!setup(fsys))
errx(1, "cannot set up file system `%s'", fsys);
printf("%s file system `%s'\nLast Mounted on %s\n",
nflag? "Examining": "Editing", fsys, sblock.fs_fsmnt);
rval = cmdloop();
if (!nflag) {
sblock.fs_clean = 0; /* mark it dirty */
sbdirty();
ckfini(0);
printf("*** FILE SYSTEM MARKED DIRTY\n");
printf("*** BE SURE TO RUN FSCK TO CLEAN UP ANY DAMAGE\n");
printf("*** IF IT WAS MOUNTED, RE-MOUNT WITH -u -o reload\n");
}
exit(rval);
}
#define CMDFUNC(func) int func __P((int argc, char *argv[]))
#define CMDFUNCSTART(func) int func(argc, argv) \
int argc; \
char *argv[];
CMDFUNC(helpfn);
CMDFUNC(focus); /* focus on inode */
CMDFUNC(active); /* print active inode */
CMDFUNC(focusname); /* focus by name */
CMDFUNC(zapi); /* clear inode */
CMDFUNC(uplink); /* incr link */
CMDFUNC(downlink); /* decr link */
CMDFUNC(linkcount); /* set link count */
CMDFUNC(quit); /* quit */
CMDFUNC(ls); /* list directory */
CMDFUNC(rm); /* remove name */
CMDFUNC(ln); /* add name */
CMDFUNC(newtype); /* change type */
CMDFUNC(chmode); /* change mode */
CMDFUNC(chlen); /* change length */
CMDFUNC(chaflags); /* change flags */
CMDFUNC(chgen); /* change generation */
CMDFUNC(chowner); /* change owner */
CMDFUNC(chgroup); /* Change group */
CMDFUNC(back); /* pop back to last ino */
CMDFUNC(chmtime); /* Change mtime */
CMDFUNC(chctime); /* Change ctime */
CMDFUNC(chatime); /* Change atime */
CMDFUNC(chinum); /* Change inode # of dirent */
CMDFUNC(chname); /* Change dirname of dirent */
struct cmdtable cmds[] = {
{ "help", "Print out help", 1, 1, FL_RO, helpfn },
{ "?", "Print out help", 1, 1, FL_RO, helpfn },
{ "inode", "Set active inode to INUM", 2, 2, FL_RO, focus },
{ "clri", "Clear inode INUM", 2, 2, FL_WR, zapi },
{ "lookup", "Set active inode by looking up NAME", 2, 2, FL_RO, focusname },
{ "cd", "Set active inode by looking up NAME", 2, 2, FL_RO, focusname },
{ "back", "Go to previous active inode", 1, 1, FL_RO, back },
{ "active", "Print active inode", 1, 1, FL_RO, active },
{ "print", "Print active inode", 1, 1, FL_RO, active },
{ "uplink", "Increment link count", 1, 1, FL_WR, uplink },
{ "downlink", "Decrement link count", 1, 1, FL_WR, downlink },
{ "linkcount", "Set link count to COUNT", 2, 2, FL_WR, linkcount },
{ "ls", "List current inode as directory", 1, 1, FL_RO, ls },
{ "rm", "Remove NAME from current inode directory", 2, 2, FL_WR, rm },
{ "del", "Remove NAME from current inode directory", 2, 2, FL_WR, rm },
{ "ln", "Hardlink INO into current inode directory as NAME", 3, 3, FL_WR, ln },
{ "chinum", "Change dir entry number INDEX to INUM", 3, 3, FL_WR, chinum },
{ "chname", "Change dir entry number INDEX to NAME", 3, 3, FL_WR, chname },
{ "chtype", "Change type of current inode to TYPE", 2, 2, FL_WR, newtype },
{ "chmod", "Change mode of current inode to MODE", 2, 2, FL_WR, chmode },
{ "chlen", "Change length of current inode to LENGTH", 2, 2, FL_WR, chlen },
{ "chown", "Change owner of current inode to OWNER", 2, 2, FL_WR, chowner },
{ "chgrp", "Change group of current inode to GROUP", 2, 2, FL_WR, chgroup },
{ "chflags", "Change flags of current inode to FLAGS", 2, 2, FL_WR, chaflags },
{ "chgen", "Change generation number of current inode to GEN", 2, 2, FL_WR, chgen },
{ "mtime", "Change mtime of current inode to MTIME", 2, 2, FL_WR, chmtime },
{ "ctime", "Change ctime of current inode to CTIME", 2, 2, FL_WR, chctime },
{ "atime", "Change atime of current inode to ATIME", 2, 2, FL_WR, chatime },
{ "quit", "Exit", 1, 1, FL_RO, quit },
{ "q", "Exit", 1, 1, FL_RO, quit },
{ "exit", "Exit", 1, 1, FL_RO, quit },
{ NULL, 0, 0, 0 },
};
int
helpfn(argc, argv)
int argc;
char *argv[];
{
register struct cmdtable *cmdtp;
printf("Commands are:\n%-10s %5s %5s %s\n",
"command", "min argc", "max argc", "what");
for (cmdtp = cmds; cmdtp->cmd; cmdtp++)
printf("%-10s %5u %5u %s\n",
cmdtp->cmd, cmdtp->minargc, cmdtp->maxargc, cmdtp->helptxt);
return 0;
}
char *
prompt(el)
EditLine *el;
{
static char pstring[64];
snprintf(pstring, sizeof(pstring), "fsdb (inum: %d)> ", curinum);
return pstring;
}
int
cmdloop()
{
char *line;
const char *elline;
int cmd_argc, rval = 0, known;
#define scratch known
char **cmd_argv;
struct cmdtable *cmdp;
History *hist;
EditLine *elptr;
curinode = ginode(ROOTINO);
curinum = ROOTINO;
printactive();
hist = history_init();
history(hist, H_EVENT, 100); /* 100 elt history buffer */
elptr = el_init(__progname, stdin, stdout);
el_set(elptr, EL_EDITOR, "emacs");
el_set(elptr, EL_PROMPT, prompt);
el_set(elptr, EL_HIST, history, hist);
el_source(elptr, NULL);
while ((elline = el_gets(elptr, &scratch)) != NULL && scratch != 0) {
if (debug)
printf("command `%s'\n", line);
history(hist, H_ENTER, elline);
line = strdup(elline);
cmd_argv = crack(line, &cmd_argc);
/*
* el_parse returns -1 to signal that it's not been handled
* internally.
*/
if (el_parse(elptr, cmd_argc, cmd_argv) != -1)
continue;
if (cmd_argc) {
known = 0;
for (cmdp = cmds; cmdp->cmd; cmdp++) {
if (!strcmp(cmdp->cmd, cmd_argv[0])) {
if ((cmdp->flags & FL_WR) == FL_WR && nflag)
warnx("`%s' requires write access", cmd_argv[0]),
rval = 1;
else if (cmd_argc >= cmdp->minargc &&
cmd_argc <= cmdp->maxargc)
rval = (*cmdp->handler)(cmd_argc, cmd_argv);
else
rval = argcount(cmdp, cmd_argc, cmd_argv);
known = 1;
break;
}
}
if (!known)
warnx("unknown command `%s'", cmd_argv[0]), rval = 1;
} else
rval = 0;
free(line);
if (rval < 0)
return rval;
if (rval)
warnx("rval was %d", rval);
}
el_end(elptr);
history_end(hist);
return rval;
}
struct dinode *curinode;
ino_t curinum, ocurrent;
#define GETINUM(ac,inum) inum = strtoul(argv[ac], &cp, 0); \
if (inum < ROOTINO || inum > maxino || cp == argv[ac] || *cp != '\0' ) { \
printf("inode %d out of range; range is [%d,%d]\n", \
inum, ROOTINO, maxino); \
return 1; \
}
/*
* Focus on given inode number
*/
CMDFUNCSTART(focus)
{
ino_t inum;
char *cp;
GETINUM(1,inum);
curinode = ginode(inum);
ocurrent = curinum;
curinum = inum;
printactive();
return 0;
}
CMDFUNCSTART(back)
{
curinum = ocurrent;
curinode = ginode(curinum);
printactive();
return 0;
}
CMDFUNCSTART(zapi)
{
ino_t inum;
struct dinode *dp;
char *cp;
GETINUM(1,inum);
dp = ginode(inum);
clearinode(dp);
inodirty();
if (curinode) /* re-set after potential change */
curinode = ginode(curinum);
return 0;
}
CMDFUNCSTART(active)
{
printactive();
return 0;
}
CMDFUNCSTART(quit)
{
return -1;
}
CMDFUNCSTART(uplink)
{
if (!checkactive())
return 1;
printf("inode %d link count now %d\n", curinum, ++curinode->di_nlink);
inodirty();
return 0;
}
CMDFUNCSTART(downlink)
{
if (!checkactive())
return 1;
printf("inode %d link count now %d\n", curinum, --curinode->di_nlink);
inodirty();
return 0;
}
const char *typename[] = {
"unknown",
"fifo",
"char special",
"unregistered #3",
"directory",
"unregistered #5",
"blk special",
"unregistered #7",
"regular",
"unregistered #9",
"symlink",
"unregistered #11",
"socket",
"unregistered #13",
"whiteout",
};
int slot;
int
scannames(idesc)
struct inodesc *idesc;
{
register struct direct *dirp = idesc->id_dirp;
printf("slot %d ino %d reclen %d: %s, `%.*s'\n",
slot++, dirp->d_ino, dirp->d_reclen, typename[dirp->d_type],
dirp->d_namlen, dirp->d_name);
return (KEEPON);
}
CMDFUNCSTART(ls)
{
struct inodesc idesc;
checkactivedir(); /* let it go on anyway */
slot = 0;
idesc.id_number = curinum;
idesc.id_func = scannames;
idesc.id_type = DATA;
idesc.id_fix = IGNORE;
ckinode(curinode, &idesc);
curinode = ginode(curinum);
return 0;
}
int findino __P((struct inodesc *idesc)); /* from fsck */
static int dolookup __P((char *name));
static int
dolookup(name)
char *name;
{
struct inodesc idesc;
if (!checkactivedir())
return 0;
idesc.id_number = curinum;
idesc.id_func = findino;
idesc.id_name = name;
idesc.id_type = DATA;
idesc.id_fix = IGNORE;
if (ckinode(curinode, &idesc) & FOUND) {
curinum = idesc.id_parent;
curinode = ginode(curinum);
printactive();
return 1;
} else {
warnx("name `%s' not found in current inode directory", name);
return 0;
}
}
CMDFUNCSTART(focusname)
{
char *p, *val;
if (!checkactive())
return 1;
ocurrent = curinum;
if (argv[1][0] == '/') {
curinum = ROOTINO;
curinode = ginode(ROOTINO);
} else {
if (!checkactivedir())
return 1;
}
for (p = argv[1]; p != NULL;) {
while ((val = strsep(&p, "/")) != NULL && *val == '\0');
if (val) {
printf("component `%s': ", val);
fflush(stdout);
if (!dolookup(val)) {
curinode = ginode(curinum);
return(1);
}
}
}
return 0;
}
CMDFUNCSTART(ln)
{
ino_t inum;
struct dinode *dp;
int rval;
char *cp;
GETINUM(1,inum);
if (!checkactivedir())
return 1;
rval = makeentry(curinum, inum, argv[2]);
if (rval)
printf("Ino %d entered as `%s'\n", inum, argv[2]);
else
printf("could not enter name? weird.\n");
curinode = ginode(curinum);
return rval;
}
CMDFUNCSTART(rm)
{
int rval;
if (!checkactivedir())
return 1;
rval = changeino(curinum, argv[1], 0);
if (rval & ALTERED) {
printf("Name `%s' removed\n", argv[1]);
return 0;
} else {
printf("could not remove name? weird.\n");
return 1;
}
}
long slotcount, desired;
int
chinumfunc(idesc)
struct inodesc *idesc;
{
register struct direct *dirp = idesc->id_dirp;
if (slotcount++ == desired) {
dirp->d_ino = idesc->id_parent;
return STOP|ALTERED|FOUND;
}
return KEEPON;
}
CMDFUNCSTART(chinum)
{
int rval;
char *cp;
ino_t inum;
struct inodesc idesc;
slotcount = 0;
if (!checkactivedir())
return 1;
GETINUM(2,inum);
desired = strtol(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' || desired < 0) {
printf("invalid slot number `%s'\n", argv[1]);
return 1;
}
idesc.id_number = curinum;
idesc.id_func = chinumfunc;
idesc.id_fix = IGNORE;
idesc.id_type = DATA;
idesc.id_parent = inum; /* XXX convenient hiding place */
if (ckinode(curinode, &idesc) & FOUND)
return 0;
else {
warnx("no %sth slot in current directory", argv[1]);
return 1;
}
}
int
chnamefunc(idesc)
struct inodesc *idesc;
{
register struct direct *dirp = idesc->id_dirp;
struct direct testdir;
if (slotcount++ == desired) {
/* will name fit? */
testdir.d_namlen = strlen(idesc->id_name);
if (DIRSIZ(NEWDIRFMT, &testdir) <= dirp->d_reclen) {
dirp->d_namlen = testdir.d_namlen;
strcpy(dirp->d_name, idesc->id_name);
return STOP|ALTERED|FOUND;
} else
return STOP|FOUND; /* won't fit, so give up */
}
return KEEPON;
}
CMDFUNCSTART(chname)
{
int rval;
char *cp;
ino_t inum;
struct inodesc idesc;
slotcount = 0;
if (!checkactivedir())
return 1;
desired = strtoul(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0') {
printf("invalid slot number `%s'\n", argv[1]);
return 1;
}
idesc.id_number = curinum;
idesc.id_func = chnamefunc;
idesc.id_fix = IGNORE;
idesc.id_type = DATA;
idesc.id_name = argv[2];
rval = ckinode(curinode, &idesc);
if ((rval & (FOUND|ALTERED)) == (FOUND|ALTERED))
return 0;
else if (rval & FOUND) {
warnx("new name `%s' does not fit in slot %s\n", argv[2], argv[1]);
return 1;
} else {
warnx("no %sth slot in current directory", argv[1]);
return 1;
}
}
struct typemap {
const char *typename;
int typebits;
} typenamemap[] = {
{"file", IFREG},
{"dir", IFDIR},
{"socket", IFSOCK},
{"fifo", IFIFO},
};
CMDFUNCSTART(newtype)
{
int rval = 1;
int type;
struct typemap *tp;
if (!checkactive())
return 1;
type = curinode->di_mode & IFMT;
for (tp = typenamemap;
tp < &typenamemap[sizeof(typemap)/sizeof(*typemap)];
tp++) {
if (!strcmp(argv[1], tp->typename)) {
printf("setting type to %s\n", tp->typename);
type = tp->typebits;
break;
}
}
if (tp == &typenamemap[sizeof(typemap)/sizeof(*typemap)]) {
warnx("type `%s' not known", argv[1]);
warnx("try one of `file', `dir', `socket', `fifo'");
return 1;
}
curinode->di_mode &= ~IFMT;
curinode->di_mode |= type;
inodirty();
printactive();
return 0;
}
CMDFUNCSTART(chlen)
{
int rval = 1;
long len;
char *cp;
if (!checkactive())
return 1;
len = strtol(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' || len < 0) {
warnx("bad length `%s'", argv[1]);
return 1;
}
curinode->di_size = len;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(chmode)
{
int rval = 1;
long modebits;
char *cp;
if (!checkactive())
return 1;
modebits = strtol(argv[1], &cp, 8);
if (cp == argv[1] || *cp != '\0' ) {
warnx("bad modebits `%s'", argv[1]);
return 1;
}
curinode->di_mode &= ~07777;
curinode->di_mode |= modebits;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(chaflags)
{
int rval = 1;
u_long flags;
char *cp;
if (!checkactive())
return 1;
flags = strtoul(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' ) {
warnx("bad flags `%s'", argv[1]);
return 1;
}
if (flags > UINT_MAX) {
warnx("flags set beyond 32-bit range of field (%lx)\n", flags);
return(1);
}
curinode->di_flags = flags;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(chgen)
{
int rval = 1;
long gen;
char *cp;
if (!checkactive())
return 1;
gen = strtol(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' ) {
warnx("bad gen `%s'", argv[1]);
return 1;
}
if (gen > INT_MAX || gen < INT_MIN) {
warnx("gen set beyond 32-bit range of field (%lx)\n", gen);
return(1);
}
curinode->di_gen = gen;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(linkcount)
{
int rval = 1;
int lcnt;
char *cp;
if (!checkactive())
return 1;
lcnt = strtol(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' ) {
warnx("bad link count `%s'", argv[1]);
return 1;
}
if (lcnt > USHRT_MAX || lcnt < 0) {
warnx("max link count is %d\n", USHRT_MAX);
return 1;
}
curinode->di_nlink = lcnt;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(chowner)
{
int rval = 1;
unsigned long uid;
char *cp;
struct passwd *pwd;
if (!checkactive())
return 1;
uid = strtoul(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' ) {
/* try looking up name */
if (pwd = getpwnam(argv[1])) {
uid = pwd->pw_uid;
} else {
warnx("bad uid `%s'", argv[1]);
return 1;
}
}
curinode->di_uid = uid;
inodirty();
printactive();
return rval;
}
CMDFUNCSTART(chgroup)
{
int rval = 1;
unsigned long gid;
char *cp;
struct group *grp;
if (!checkactive())
return 1;
gid = strtoul(argv[1], &cp, 0);
if (cp == argv[1] || *cp != '\0' ) {
if (grp = getgrnam(argv[1])) {
gid = grp->gr_gid;
} else {
warnx("bad gid `%s'", argv[1]);
return 1;
}
}
curinode->di_gid = gid;
inodirty();
printactive();
return rval;
}
int
dotime(name, rts)
char *name;
struct timespec *rts;
{
char *p, *val;
struct tm t;
int32_t sec;
int32_t nsec;
p = strchr(name, '.');
if (p) {
*p = '\0';
nsec = strtoul(++p, &val, 0);
if (val == p || *val != '\0' || nsec >= 1000000000 || nsec < 0) {
warnx("invalid nanoseconds");
goto badformat;
}
} else
nsec = 0;
if (strlen(name) != 14) {
badformat:
warnx("date format: YYYYMMDDHHMMSS[.nsec]");
return 1;
}
for (p = name; *p; p++)
if (*p < '0' || *p > '9')
goto badformat;
p = name;
#define VAL() ((*p++) - '0')
t.tm_year = VAL();
t.tm_year = VAL() + t.tm_year * 10;
t.tm_year = VAL() + t.tm_year * 10;
t.tm_year = VAL() + t.tm_year * 10 - 1900;
t.tm_mon = VAL();
t.tm_mon = VAL() + t.tm_mon * 10 - 1;
t.tm_mday = VAL();
t.tm_mday = VAL() + t.tm_mday * 10;
t.tm_hour = VAL();
t.tm_hour = VAL() + t.tm_hour * 10;
t.tm_min = VAL();
t.tm_min = VAL() + t.tm_min * 10;
t.tm_sec = VAL();
t.tm_sec = VAL() + t.tm_sec * 10;
t.tm_isdst = -1;
sec = mktime(&t);
if (sec == -1) {
warnx("date/time out of range");
return 1;
}
rts->tv_sec = sec;
rts->tv_nsec = nsec;
return 0;
}
CMDFUNCSTART(chmtime)
{
if (dotime(argv[1], &curinode->di_ctime))
return 1;
inodirty();
printactive();
return 0;
}
CMDFUNCSTART(chatime)
{
if (dotime(argv[1], &curinode->di_ctime))
return 1;
inodirty();
printactive();
return 0;
}
CMDFUNCSTART(chctime)
{
if (dotime(argv[1], &curinode->di_ctime))
return 1;
inodirty();
printactive();
return 0;
}
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