4 Copyright (C) Amitay Isaacs 2013
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "system/filesys.h"
22 #include "system/network.h"
26 #include "ctdb_private.h"
28 #include "common/system.h"
30 static char *progname = NULL;
32 static void send_result(int fd, char result)
34 sys_write(fd, &result, 1);
41 static void usage(void)
43 fprintf(stderr, "\n");
44 fprintf(stderr, "Usage: %s <log-fd> <ctdbd-pid> <output-fd> RECORD <db-path> <db-flags> <db-key>\n",
46 fprintf(stderr, " %s <log-fd> <ctdbd-pid> <output-fd> DB <db1-path> <db1-flags> [<db2-path> <db2-flags>...]\n",
50 static uint8_t *hex_decode_talloc(TALLOC_CTX *mem_ctx,
51 const char *hex_in, size_t *len)
56 *len = strlen(hex_in) / 2;
57 buffer = talloc_array(mem_ctx, unsigned char, *len);
59 for (i=0; i<*len; i++) {
60 sscanf(&hex_in[i*2], "%02X", &num);
61 buffer[i] = (uint8_t)num;
67 static int lock_record(const char *dbpath, const char *dbflags, const char *dbkey)
70 struct tdb_context *tdb;
73 /* No error checking since CTDB always passes sane values */
74 tdb_flags = strtol(dbflags, NULL, 0);
76 /* Convert hex key to key */
77 if (strcmp(dbkey, "NULL") == 0) {
81 key.dptr = hex_decode_talloc(NULL, dbkey, &key.dsize);
84 tdb = tdb_open(dbpath, 0, tdb_flags, O_RDWR, 0600);
86 fprintf(stderr, "%s: Error opening database %s\n", progname, dbpath);
90 if (tdb_chainlock(tdb, key) < 0) {
91 fprintf(stderr, "%s: Error getting record lock (%s)\n",
92 progname, tdb_errorstr(tdb));
101 static int lock_db(const char *dbpath, const char *dbflags)
103 struct tdb_context *tdb;
106 /* No error checking since CTDB always passes sane values */
107 tdb_flags = strtol(dbflags, NULL, 0);
109 tdb = tdb_open(dbpath, 0, tdb_flags, O_RDWR, 0600);
111 fprintf(stderr, "%s: Error opening database %s\n", progname, dbpath);
115 if (tdb_lockall(tdb) < 0) {
116 fprintf(stderr, "%s: Error getting db lock (%s)\n",
117 progname, tdb_errorstr(tdb));
125 int main(int argc, char *argv[])
127 int write_fd, log_fd;
130 const char *lock_type;
139 if (!set_scheduler()) {
140 fprintf(stderr, "%s: Unable to set real-time scheduler priority\n",
144 log_fd = atoi(argv[1]);
145 close(STDOUT_FILENO);
146 close(STDERR_FILENO);
147 dup2(log_fd, STDOUT_FILENO);
148 dup2(log_fd, STDERR_FILENO);
151 ppid = atoi(argv[2]);
152 write_fd = atoi(argv[3]);
155 if (strcmp(lock_type, "RECORD") == 0) {
157 fprintf(stderr, "%s: Invalid number of arguments (%d)\n",
162 result = lock_record(argv[5], argv[6], argv[7]);
164 } else if (strcmp(lock_type, "DB") == 0) {
167 /* If there are no databases specified, no need for lock */
169 for (n=5; n+1<argc; n+=2) {
170 result = lock_db(argv[n], argv[n+1]);
178 fprintf(stderr, "%s: Invalid lock-type '%s'\n", progname, lock_type);
183 send_result(write_fd, result);
185 while (kill(ppid, 0) == 0 || errno != ESRCH) {