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/*
tdbrestore -- construct a tdb from tdbdump output.
Copyright (C) Volker Lendecke 2010
Copyright (C) Simon McVittie 2005
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 <assert.h>
#include "replace.h"
#include "system/locale.h"
#include "system/time.h"
#include "system/filesys.h"
#include "system/wait.h"
#include "tdb.h"
static int read_linehead(FILE *f)
{
int i, c;
int num_bytes;
char prefix[128];
while (1) {
c = getc(f);
if (c == EOF) {
return -1;
}
if (c == '(') {
break;
}
}
for (i=0; i<sizeof(prefix); i++) {
c = getc(f);
if (c == EOF) {
return -1;
}
prefix[i] = c;
if (c == '"') {
break;
}
}
if (i == sizeof(prefix)) {
return -1;
}
prefix[i] = '\0';
if (sscanf(prefix, "%d) = ", &num_bytes) != 1) {
return -1;
}
return num_bytes;
}
static int read_hex(void) {
int c;
c = getchar();
if (c == EOF) {
fprintf(stderr, "Unexpected EOF in data\n");
return -1;
} else if (c == '"') {
fprintf(stderr, "Unexpected \\\" sequence\n");
return -1;
} else if ('0' <= c && c <= '9') {
return c - '0';
} else if ('A' <= c && c <= 'F') {
return c - 'A' + 10;
} else if ('a' <= c && c <= 'f') {
return c - 'a' + 10;
} else {
fprintf(stderr, "Invalid hex: %c\n", c);
return -1;
}
}
static int read_data(FILE *f, TDB_DATA *d, size_t size) {
int c, low, high;
int i;
d->dptr = (unsigned char *)malloc(size);
if (d->dptr == NULL) {
return -1;
}
d->dsize = size;
for (i=0; i<size; i++) {
c = getc(f);
if (c == EOF) {
fprintf(stderr, "Unexpected EOF in data\n");
return 1;
} else if (c == '"') {
return 0;
} else if (c == '\\') {
high = read_hex();
if (high < 0) {
return -1;
}
high = high << 4;
assert(high == (high & 0xf0));
low = read_hex();
if (low < 0) {
return -1;
}
assert(low == (low & 0x0f));
d->dptr[i] = (low|high);
} else {
d->dptr[i] = c;
}
}
return 0;
}
static int swallow(FILE *f, const char *s, int *eof)
{
char line[128];
if (fgets(line, sizeof(line), f) == NULL) {
if (eof != NULL) {
*eof = 1;
}
return -1;
}
if (strcmp(line, s) != 0) {
return -1;
}
return 0;
}
static int read_rec(FILE *f, TDB_CONTEXT *tdb, int *eof)
{
int length;
TDB_DATA key, data;
int ret = -1;
key.dptr = NULL;
data.dptr = NULL;
if (swallow(f, "{\n", eof) == -1) {
goto fail;
}
length = read_linehead(f);
if (length == -1) {
goto fail;
}
if (read_data(f, &key, length) == -1) {
goto fail;
}
if (swallow(f, "\"\n", NULL) == -1) {
goto fail;
}
length = read_linehead(f);
if (length == -1) {
goto fail;
}
if (read_data(f, &data, length) == -1) {
goto fail;
}
if ((swallow(f, "\"\n", NULL) == -1)
|| (swallow(f, "}\n", NULL) == -1)) {
goto fail;
}
if (tdb_store(tdb, key, data, TDB_INSERT) != 0) {
fprintf(stderr, "TDB error: %s\n", tdb_errorstr(tdb));
goto fail;
}
ret = 0;
fail:
free(key.dptr);
free(data.dptr);
return ret;
}
static int restore_tdb(const char *fname)
{
TDB_CONTEXT *tdb;
tdb = tdb_open(fname, 0, 0, O_RDWR|O_CREAT|O_EXCL, 0666);
if (!tdb) {
perror("tdb_open");
fprintf(stderr, "Failed to open %s\n", fname);
return 1;
}
while (1) {
int eof = 0;
if (read_rec(stdin, tdb, &eof) == -1) {
if (eof) {
break;
}
return 1;
}
}
if (tdb_close(tdb)) {
fprintf(stderr, "Error closing tdb\n");
return 1;
}
return 0;
}
int main(int argc, char *argv[])
{
char *fname;
if (argc < 2) {
printf("Usage: %s dbname < tdbdump_output\n", argv[0]);
exit(1);
}
fname = argv[1];
return restore_tdb(fname);
}
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