493 lines
11 KiB
C
493 lines
11 KiB
C
/* mdb_load.c - memory-mapped database load tool */
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/*
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* Copyright 2011-2018 Howard Chu, Symas Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include "lmdb.h"
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#define PRINT 1
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#define NOHDR 2
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static int mode;
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static char *subname = NULL;
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static mdb_size_t lineno;
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static int version;
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static int flags;
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static char *prog;
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static int Eof;
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static MDB_envinfo info;
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static MDB_val kbuf, dbuf;
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static MDB_val k0buf;
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#define Yu MDB_PRIy(u)
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#define STRLENOF(s) (sizeof(s)-1)
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typedef struct flagbit {
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int bit;
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char *name;
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int len;
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} flagbit;
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#define S(s) s, STRLENOF(s)
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flagbit dbflags[] = {
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{ MDB_REVERSEKEY, S("reversekey") },
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{ MDB_DUPSORT, S("dupsort") },
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{ MDB_INTEGERKEY, S("integerkey") },
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{ MDB_DUPFIXED, S("dupfixed") },
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{ MDB_INTEGERDUP, S("integerdup") },
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{ MDB_REVERSEDUP, S("reversedup") },
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{ 0, NULL, 0 }
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};
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static void readhdr(void)
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{
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char *ptr;
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flags = 0;
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while (fgets(dbuf.mv_data, dbuf.mv_size, stdin) != NULL) {
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lineno++;
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if (!strncmp(dbuf.mv_data, "VERSION=", STRLENOF("VERSION="))) {
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version=atoi((char *)dbuf.mv_data+STRLENOF("VERSION="));
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if (version > 3) {
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fprintf(stderr, "%s: line %"Yu": unsupported VERSION %d\n",
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prog, lineno, version);
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exit(EXIT_FAILURE);
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}
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} else if (!strncmp(dbuf.mv_data, "HEADER=END", STRLENOF("HEADER=END"))) {
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break;
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} else if (!strncmp(dbuf.mv_data, "format=", STRLENOF("format="))) {
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if (!strncmp((char *)dbuf.mv_data+STRLENOF("FORMAT="), "print", STRLENOF("print")))
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mode |= PRINT;
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else if (strncmp((char *)dbuf.mv_data+STRLENOF("FORMAT="), "bytevalue", STRLENOF("bytevalue"))) {
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fprintf(stderr, "%s: line %"Yu": unsupported FORMAT %s\n",
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prog, lineno, (char *)dbuf.mv_data+STRLENOF("FORMAT="));
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exit(EXIT_FAILURE);
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}
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} else if (!strncmp(dbuf.mv_data, "database=", STRLENOF("database="))) {
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ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size);
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if (ptr) *ptr = '\0';
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if (subname) free(subname);
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subname = strdup((char *)dbuf.mv_data+STRLENOF("database="));
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} else if (!strncmp(dbuf.mv_data, "type=", STRLENOF("type="))) {
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if (strncmp((char *)dbuf.mv_data+STRLENOF("type="), "btree", STRLENOF("btree"))) {
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fprintf(stderr, "%s: line %"Yu": unsupported type %s\n",
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prog, lineno, (char *)dbuf.mv_data+STRLENOF("type="));
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exit(EXIT_FAILURE);
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}
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} else if (!strncmp(dbuf.mv_data, "mapaddr=", STRLENOF("mapaddr="))) {
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int i;
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ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size);
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if (ptr) *ptr = '\0';
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i = sscanf((char *)dbuf.mv_data+STRLENOF("mapaddr="), "%p", &info.me_mapaddr);
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if (i != 1) {
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fprintf(stderr, "%s: line %"Yu": invalid mapaddr %s\n",
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prog, lineno, (char *)dbuf.mv_data+STRLENOF("mapaddr="));
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exit(EXIT_FAILURE);
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}
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} else if (!strncmp(dbuf.mv_data, "mapsize=", STRLENOF("mapsize="))) {
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int i;
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ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size);
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if (ptr) *ptr = '\0';
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i = sscanf((char *)dbuf.mv_data+STRLENOF("mapsize="),
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"%" MDB_SCNy(u), &info.me_mapsize);
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if (i != 1) {
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fprintf(stderr, "%s: line %"Yu": invalid mapsize %s\n",
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prog, lineno, (char *)dbuf.mv_data+STRLENOF("mapsize="));
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exit(EXIT_FAILURE);
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}
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} else if (!strncmp(dbuf.mv_data, "maxreaders=", STRLENOF("maxreaders="))) {
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int i;
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ptr = memchr(dbuf.mv_data, '\n', dbuf.mv_size);
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if (ptr) *ptr = '\0';
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i = sscanf((char *)dbuf.mv_data+STRLENOF("maxreaders="), "%u", &info.me_maxreaders);
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if (i != 1) {
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fprintf(stderr, "%s: line %"Yu": invalid maxreaders %s\n",
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prog, lineno, (char *)dbuf.mv_data+STRLENOF("maxreaders="));
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exit(EXIT_FAILURE);
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}
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} else {
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int i;
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for (i=0; dbflags[i].bit; i++) {
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if (!strncmp(dbuf.mv_data, dbflags[i].name, dbflags[i].len) &&
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((char *)dbuf.mv_data)[dbflags[i].len] == '=') {
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flags |= dbflags[i].bit;
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break;
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}
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}
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if (!dbflags[i].bit) {
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ptr = memchr(dbuf.mv_data, '=', dbuf.mv_size);
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if (!ptr) {
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fprintf(stderr, "%s: line %"Yu": unexpected format\n",
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prog, lineno);
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exit(EXIT_FAILURE);
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} else {
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*ptr = '\0';
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fprintf(stderr, "%s: line %"Yu": unrecognized keyword ignored: %s\n",
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prog, lineno, (char *)dbuf.mv_data);
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}
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}
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}
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}
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}
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static void badend(void)
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{
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fprintf(stderr, "%s: line %"Yu": unexpected end of input\n",
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prog, lineno);
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}
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static int unhex(unsigned char *c2)
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{
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int x, c;
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x = *c2++ & 0x4f;
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if (x & 0x40)
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x -= 55;
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c = x << 4;
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x = *c2 & 0x4f;
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if (x & 0x40)
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x -= 55;
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c |= x;
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return c;
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}
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static int readline(MDB_val *out, MDB_val *buf)
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{
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unsigned char *c1, *c2, *end;
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size_t len, l2;
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int c;
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if (!(mode & NOHDR)) {
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c = fgetc(stdin);
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if (c == EOF) {
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Eof = 1;
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return EOF;
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}
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if (c != ' ') {
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lineno++;
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if (fgets(buf->mv_data, buf->mv_size, stdin) == NULL) {
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badend:
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Eof = 1;
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badend();
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return EOF;
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}
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if (c == 'D' && !strncmp(buf->mv_data, "ATA=END", STRLENOF("ATA=END")))
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return EOF;
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goto badend;
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}
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}
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if (fgets(buf->mv_data, buf->mv_size, stdin) == NULL) {
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Eof = 1;
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return EOF;
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}
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lineno++;
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c1 = buf->mv_data;
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len = strlen((char *)c1);
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l2 = len;
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/* Is buffer too short? */
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while (c1[len-1] != '\n') {
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buf->mv_data = realloc(buf->mv_data, buf->mv_size*2);
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if (!buf->mv_data) {
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Eof = 1;
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fprintf(stderr, "%s: line %"Yu": out of memory, line too long\n",
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prog, lineno);
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return EOF;
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}
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c1 = buf->mv_data;
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c1 += l2;
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if (fgets((char *)c1, buf->mv_size+1, stdin) == NULL) {
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Eof = 1;
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badend();
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return EOF;
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}
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buf->mv_size *= 2;
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len = strlen((char *)c1);
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l2 += len;
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}
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c1 = c2 = buf->mv_data;
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len = l2;
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c1[--len] = '\0';
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end = c1 + len;
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if (mode & PRINT) {
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while (c2 < end) {
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if (*c2 == '\\') {
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if (c2[1] == '\\') {
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*c1++ = *c2;
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} else {
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if (c2+3 > end || !isxdigit(c2[1]) || !isxdigit(c2[2])) {
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Eof = 1;
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badend();
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return EOF;
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}
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*c1++ = unhex(++c2);
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}
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c2 += 2;
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} else {
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/* copies are redundant when no escapes were used */
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*c1++ = *c2++;
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}
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}
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} else {
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/* odd length not allowed */
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if (len & 1) {
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Eof = 1;
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badend();
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return EOF;
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}
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while (c2 < end) {
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if (!isxdigit(*c2) || !isxdigit(c2[1])) {
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Eof = 1;
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badend();
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return EOF;
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}
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*c1++ = unhex(c2);
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c2 += 2;
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}
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}
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c2 = out->mv_data = buf->mv_data;
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out->mv_size = c1 - c2;
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return 0;
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}
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static void usage(void)
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{
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fprintf(stderr, "usage: %s [-V] [-a] [-f input] [-n] [-s name] [-N] [-T] dbpath\n", prog);
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exit(EXIT_FAILURE);
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}
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static int greater(const MDB_val *a, const MDB_val *b)
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{
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return 1;
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}
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int main(int argc, char *argv[])
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{
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int i, rc;
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MDB_env *env;
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MDB_txn *txn;
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MDB_cursor *mc;
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MDB_dbi dbi;
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char *envname;
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int envflags = MDB_NOSYNC, putflags = 0;
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int dohdr = 0, append = 0;
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MDB_val prevk;
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prog = argv[0];
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if (argc < 2) {
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usage();
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}
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/* -a: append records in input order
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* -f: load file instead of stdin
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* -n: use NOSUBDIR flag on env_open
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* -s: load into named subDB
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* -N: use NOOVERWRITE on puts
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* -T: read plaintext
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* -V: print version and exit
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*/
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while ((i = getopt(argc, argv, "af:ns:NTV")) != EOF) {
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switch(i) {
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case 'V':
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printf("%s\n", MDB_VERSION_STRING);
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exit(0);
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break;
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case 'a':
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append = 1;
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break;
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case 'f':
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if (freopen(optarg, "r", stdin) == NULL) {
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fprintf(stderr, "%s: %s: reopen: %s\n",
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prog, optarg, strerror(errno));
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exit(EXIT_FAILURE);
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}
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break;
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case 'n':
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envflags |= MDB_NOSUBDIR;
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break;
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case 's':
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subname = strdup(optarg);
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break;
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case 'N':
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putflags = MDB_NOOVERWRITE|MDB_NODUPDATA;
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break;
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case 'T':
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mode |= NOHDR | PRINT;
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break;
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default:
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usage();
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}
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}
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if (optind != argc - 1)
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usage();
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dbuf.mv_size = 4096;
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dbuf.mv_data = malloc(dbuf.mv_size);
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if (!(mode & NOHDR))
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readhdr();
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envname = argv[optind];
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rc = mdb_env_create(&env);
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if (rc) {
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fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
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return EXIT_FAILURE;
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}
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mdb_env_set_maxdbs(env, 2);
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if (info.me_maxreaders)
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mdb_env_set_maxreaders(env, info.me_maxreaders);
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if (info.me_mapsize)
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mdb_env_set_mapsize(env, info.me_mapsize);
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if (info.me_mapaddr)
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envflags |= MDB_FIXEDMAP;
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rc = mdb_env_open(env, envname, envflags, 0664);
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if (rc) {
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fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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kbuf.mv_size = mdb_env_get_maxkeysize(env) * 2 + 2;
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kbuf.mv_data = malloc(kbuf.mv_size * 2);
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k0buf.mv_size = kbuf.mv_size;
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k0buf.mv_data = (char *)kbuf.mv_data + kbuf.mv_size;
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prevk.mv_data = k0buf.mv_data;
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while(!Eof) {
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MDB_val key, data;
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int batch = 0;
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int appflag;
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if (!dohdr) {
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dohdr = 1;
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} else if (!(mode & NOHDR))
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readhdr();
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rc = mdb_txn_begin(env, NULL, 0, &txn);
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if (rc) {
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fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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rc = mdb_open(txn, subname, flags|MDB_CREATE, &dbi);
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if (rc) {
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fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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prevk.mv_size = 0;
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if (append) {
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mdb_set_compare(txn, dbi, greater);
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if (flags & MDB_DUPSORT)
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mdb_set_dupsort(txn, dbi, greater);
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}
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rc = mdb_cursor_open(txn, dbi, &mc);
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if (rc) {
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fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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while(1) {
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rc = readline(&key, &kbuf);
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if (rc) /* rc == EOF */
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break;
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rc = readline(&data, &dbuf);
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if (rc) {
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fprintf(stderr, "%s: line %"Yu": failed to read key value\n", prog, lineno);
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goto txn_abort;
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}
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if (append) {
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appflag = MDB_APPEND;
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if (flags & MDB_DUPSORT) {
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if (prevk.mv_size == key.mv_size && !memcmp(prevk.mv_data, key.mv_data, key.mv_size))
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appflag = MDB_CURRENT|MDB_APPENDDUP;
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else {
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memcpy(prevk.mv_data, key.mv_data, key.mv_size);
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prevk.mv_size = key.mv_size;
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}
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}
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} else {
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appflag = 0;
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}
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rc = mdb_cursor_put(mc, &key, &data, putflags|appflag);
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if (rc == MDB_KEYEXIST && putflags)
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continue;
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if (rc) {
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fprintf(stderr, "mdb_cursor_put failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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batch++;
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if (batch == 100) {
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rc = mdb_txn_commit(txn);
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if (rc) {
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fprintf(stderr, "%s: line %"Yu": txn_commit: %s\n",
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prog, lineno, mdb_strerror(rc));
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goto env_close;
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}
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rc = mdb_txn_begin(env, NULL, 0, &txn);
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if (rc) {
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fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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rc = mdb_cursor_open(txn, dbi, &mc);
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if (rc) {
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fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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if (appflag & MDB_APPENDDUP) {
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MDB_val k, d;
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mdb_cursor_get(mc, &k, &d, MDB_LAST);
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}
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batch = 0;
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}
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}
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rc = mdb_txn_commit(txn);
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txn = NULL;
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if (rc) {
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fprintf(stderr, "%s: line %"Yu": txn_commit: %s\n",
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prog, lineno, mdb_strerror(rc));
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goto env_close;
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}
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mdb_dbi_close(env, dbi);
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}
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txn_abort:
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mdb_txn_abort(txn);
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env_close:
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mdb_env_close(env);
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return rc ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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