source: vendor/current/lib/tdb/tools/tdbdump.c

/*
   Unix SMB/CIFS implementation.
   simple tdb dump util
   Copyright (C) Andrew Tridgell              2001

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "replace.h"
#include "system/locale.h"
#include "system/time.h"
#include "system/filesys.h"
#include "system/wait.h"
#include "tdb.h"

static void print_data(TDB_DATA d)
{
        unsigned char *p = (unsigned char *)d.dptr;
        int len = d.dsize;
        while (len--) {
                if (isprint(*p) && !strchr("\"\\", *p)) {
                        fputc(*p, stdout);
                } else {
                        printf("\\%02X", *p);
                }
                p++;
        }
}

static int traverse_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
        printf("{\n");
        printf("key(%d) = \"", (int)key.dsize);
        print_data(key);
        printf("\"\n");
        printf("data(%d) = \"", (int)dbuf.dsize);
        print_data(dbuf);
        printf("\"\n");
        printf("}\n");
        return 0;
}

static void log_stderr(struct tdb_context *tdb, enum tdb_debug_level level,
                       const char *fmt, ...)
{
        va_list ap;
        const char *name = tdb_name(tdb);
        const char *prefix = "";

        if (!name)
                name = "unnamed";

        switch (level) {
        case TDB_DEBUG_ERROR:
                prefix = "ERROR: ";
                break;
        case TDB_DEBUG_WARNING:
                prefix = "WARNING: ";
                break;
        case TDB_DEBUG_TRACE:
                return;

        default:
        case TDB_DEBUG_FATAL:
                prefix = "FATAL: ";
                break;
        }

        va_start(ap, fmt);
        fprintf(stderr, "tdb(%s): %s", name, prefix);
        vfprintf(stderr, fmt, ap);
        va_end(ap);
}

static void emergency_walk(TDB_DATA key, TDB_DATA dbuf, void *keyname)
{
        if (keyname) {
                if (key.dsize != strlen(keyname))
                        return;
                if (memcmp(key.dptr, keyname, key.dsize) != 0)
                        return;
        }
        traverse_fn(NULL, key, dbuf, NULL);
}

static int dump_tdb(const char *fname, const char *keyname, bool emergency)
{
        TDB_CONTEXT *tdb;
        TDB_DATA key, value;
        struct tdb_logging_context logfn = { log_stderr };
        int tdb_flags = TDB_DEFAULT;

        /*
         * Note: that O_RDONLY implies TDB_NOLOCK, but we want to make it
         * explicit as it's important when working on databases which were
         * created with mutex locking.
         */
        tdb_flags |= TDB_NOLOCK;

        tdb = tdb_open_ex(fname, 0, tdb_flags, O_RDONLY, 0, &logfn, NULL);
        if (!tdb) {
                printf("Failed to open %s\n", fname);
                return 1;
        }

        if (emergency) {
                return tdb_rescue(tdb, emergency_walk, discard_const(keyname)) == 0;
        }
        if (!keyname) {
                return tdb_traverse(tdb, traverse_fn, NULL) == -1 ? 1 : 0;
        } else {
                key.dptr = discard_const_p(uint8_t, keyname);
                key.dsize = strlen(keyname);
                value = tdb_fetch(tdb, key);
                if (!value.dptr) {
                        return 1;
                } else {
                        print_data(value);
                        free(value.dptr);
                }
        }

        return 0;
}

static void usage( void)
{
        printf( "Usage: tdbdump [options] <filename>\n\n");
        printf( "   -h          this help message\n");
        printf( "   -k keyname  dumps value of keyname\n");
        printf( "   -e          emergency dump, for corrupt databases\n");
}

 int main(int argc, char *argv[])
{
        char *fname, *keyname=NULL;
        bool emergency = false;
        int c;

        if (argc < 2) {
                printf("Usage: tdbdump <fname>\n");
                exit(1);
        }

        while ((c = getopt( argc, argv, "hk:e")) != -1) {
                switch (c) {
                case 'h':
                        usage();
                        exit( 0);
                case 'k':
                        keyname = optarg;
                        break;
                case 'e':
                        emergency = true;
                        break;
                default:
                        usage();
                        exit( 1);
                }
        }

        fname = argv[optind];

        return dump_tdb(fname, keyname, emergency);
}