1/* 2 Unix SMB/CIFS implementation. 3 4 wins hook feature, we run a specified script 5 which can then do some custom actions 6 7 Copyright (C) Stefan Metzmacher 2005 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. 21*/ 22 23#include "includes.h" 24#include "nbt_server/nbt_server.h" 25#include "nbt_server/wins/winsdb.h" 26#include "system/filesys.h" 27 28static const char *wins_hook_action_string(enum wins_hook_action action) 29{ 30 switch (action) { 31 case WINS_HOOK_ADD: return "add"; 32 case WINS_HOOK_MODIFY: return "refresh"; 33 case WINS_HOOK_DELETE: return "delete"; 34 } 35 36 return "unknown"; 37} 38 39void wins_hook(struct winsdb_handle *h, const struct winsdb_record *rec, 40 enum wins_hook_action action, const char *wins_hook_script) 41{ 42 uint32_t i, length; 43 int child; 44 char *cmd = NULL; 45 TALLOC_CTX *tmp_mem = NULL; 46 47 if (!wins_hook_script || !wins_hook_script[0]) return; 48 49 tmp_mem = talloc_new(h); 50 if (!tmp_mem) goto failed; 51 52 length = winsdb_addr_list_length(rec->addresses); 53 54 if (action == WINS_HOOK_MODIFY && length < 1) { 55 action = WINS_HOOK_DELETE; 56 } 57 58 cmd = talloc_asprintf(tmp_mem, 59 "%s %s %s %02x %ld", 60 wins_hook_script, 61 wins_hook_action_string(action), 62 rec->name->name, 63 rec->name->type, 64 rec->expire_time); 65 if (!cmd) goto failed; 66 67 for (i=0; rec->addresses[i]; i++) { 68 cmd = talloc_asprintf_append_buffer(cmd, " %s", rec->addresses[i]->address); 69 if (!cmd) goto failed; 70 } 71 72 DEBUG(10,("call wins hook '%s'\n", cmd)); 73 74 /* signal handling in posix really sucks - doing this in a library 75 affects the whole app, but what else to do?? */ 76 signal(SIGCHLD, SIG_IGN); 77 78 child = fork(); 79 if (child == (pid_t)-1) { 80 goto failed; 81 } 82 83 if (child == 0) { 84/* TODO: close file handles */ 85 execl("/bin/sh", "sh", "-c", cmd, NULL); 86 _exit(0); 87 } 88 89 talloc_free(tmp_mem); 90 return; 91failed: 92 talloc_free(tmp_mem); 93 DEBUG(0,("FAILED: calling wins hook '%s'\n", wins_hook_script)); 94} 95