source/utils/smbcontrol.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    program to send control messages to Samba processes
   5    Copyright (C) Andrew Tridgell 1994-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 static struct {
  25         char *name;
  26         int value;
  27 } msg_types[] = {
  28         {"debug", MSG_DEBUG},
  29         {"force-election", MSG_FORCE_ELECTION},
  30         {"ping", MSG_PING},
  31         {"profile", MSG_PROFILE},
  32         {"profilelevel", MSG_REQ_PROFILELEVEL},
  33         {"debuglevel", MSG_REQ_DEBUGLEVEL},
  34         {"printer-notify", MSG_PRINTER_NOTIFY},
  35         {NULL, -1}
  36 };
  37
  38 time_t timeout_start;
  39
  40 #define MAX_WAIT        10
  41
  42 static void usage(BOOL doexit)
  43 {
  44         int i;
  45         if (doexit) {
  46                 printf("Usage: smbcontrol -i\n");
  47                 printf("       smbcontrol <destination> <message-type> <parameters>\n\n");
  48         } else {
  49                 printf("<destination> <message-type> <parameters>\n\n");
  50         }
  51         printf("\t<destination> is one of \"nmbd\", \"smbd\" or a process ID\n");
  52         printf("\t<message-type> is one of: ");
  53         for (i=0; msg_types[i].name; i++)
  54             printf("%s%s", i?", ":"",msg_types[i].name);
  55         printf("\n");
  56         if (doexit) exit(1);
  57 }
  58
  59 static int pong_count;
  60 static BOOL got_level;
  61 static BOOL pong_registered = False;
  62 static BOOL debuglevel_registered = False;
  63 static BOOL profilelevel_registered = False;
  64
  65
  66 /****************************************************************************
  67 a useful function for testing the message system
  68 ****************************************************************************/
  69 void pong_function(int msg_type, pid_t src, void *buf, size_t len)
  70 {
  71         pong_count++;
  72         printf("PONG from PID %u\n",(unsigned int)src);
  73 }
  74
  75 /****************************************************************************
  76 Prints out the current Debug level returned by MSG_DEBUGLEVEL
  77 ****************************************************************************/
  78 void debuglevel_function(int msg_type, pid_t src, void *buf, size_t len)
  79 {
  80         int i;
  81         int debuglevel_class[DBGC_LAST];
  82
  83         memcpy(debuglevel_class, buf, len);
  84
  85         printf("Current debug level of PID %u is %d ",(unsigned int)src, debuglevel_class[0]);
  86         for (i=1;i<DBGC_LAST;i++)
  87                 if (debuglevel_class[i])
  88                         printf("%s:%d ", debug_classname_from_index(i), debuglevel_class[i]);
  89         printf("\n");
  90
  91         got_level = True;
  92 }
  93
  94 /****************************************************************************
  95 Prints out the current Profile level returned by MSG_PROFILELEVEL
  96 ****************************************************************************/
  97 void profilelevel_function(int msg_type, pid_t src, void *buf, size_t len)
  98 {
  99         int level;
 100         char *s=NULL;
 101         memcpy(&level, buf, sizeof(int));
 102
 103         if (level) {
 104             switch (level) {
 105             case 1:
 106                 s = "off";
 107                 break;
 108             case 3:
 109                 s = "count only";
 110                 break;
 111             case 7:
 112                 s = "count and time";
 113                 break;
 114             }
 115             printf("Profiling %s on PID %u\n",s,(unsigned int)src);
 116         } else {
 117             printf("Profiling not available on PID %u\n",(unsigned int)src);
 118         }
 119         got_level = True;
 120 }
 121
 122 /****************************************************************************
 123 send a message to a named destination
 124 ****************************************************************************/
 125 static BOOL send_message(char *dest, int msg_type, void *buf, int len, BOOL duplicates)
 126 {
 127         pid_t pid;
 128         TDB_CONTEXT *the_tdb;
 129
 130         the_tdb = tdb_open(lock_path("connections.tdb"), 0, 0, O_RDONLY, 0);
 131         if (!the_tdb) {
 132                 fprintf(stderr,"Failed to open connections database in send_message.\n");
 133                 return False;
 134         }
 135
 136         /* "smbd" is the only broadcast operation */
 137         if (strequal(dest,"smbd")) {
 138                 return message_send_all(the_tdb,msg_type, buf, len, duplicates);
 139         } else if (strequal(dest,"nmbd")) {
 140                 pid = pidfile_pid(dest);
 141                 if (pid == 0) {
 142                         fprintf(stderr,"Can't find pid for nmbd\n");
 143                         return False;
 144                 }
 145         } else if (strequal(dest,"self")) {
 146                 pid = getpid();
 147         } else {
 148                 pid = atoi(dest);
 149                 if (pid == 0) {
 150                         fprintf(stderr,"Not a valid pid\n");
 151                         return False;
 152                 }
 153         }
 154
 155         return message_send_pid(pid, msg_type, buf, len, duplicates);
 156 }
 157
 158 /****************************************************************************
 159 evaluate a message type string
 160 ****************************************************************************/
 161 static int parse_type(char *mtype)
 162 {
 163         int i;
 164         for (i=0;msg_types[i].name;i++) {
 165                 if (strequal(mtype, msg_types[i].name)) return msg_types[i].value;
 166         }
 167         return -1;
 168 }
 169
 170
 171 /****************************************************************************
 172 do command
 173 ****************************************************************************/
 174 static BOOL do_command(char *dest, char *msg_name, char **params)
 175 {
 176         int i, n, v;
 177         int mtype;
 178         BOOL retval=False;
 179         int debuglevel_class[DBGC_LAST];
 180
 181         mtype = parse_type(msg_name);
 182         if (mtype == -1) {
 183                 fprintf(stderr,"Couldn't resolve message type: %s\n", msg_name);
 184                 return(False);
 185         }
 186
 187         switch (mtype) {
 188         case MSG_DEBUG:
 189                 if (!params || !params[0]) {
 190                         fprintf(stderr,"MSG_DEBUG needs a parameter\n");
 191                         return(False);
 192                 }
 193
 194                 ZERO_ARRAY(debuglevel_class);
 195                 if (!debug_parse_params(params, debuglevel_class)) {
 196                         fprintf(stderr, "MSG_DEBUG error. Expected <class name>:level\n");
 197                         return(False);
 198                 } else
 199                         send_message(dest, MSG_DEBUG, debuglevel_class, sizeof(debuglevel_class), False);
 200                 break;
 201
 202         case MSG_PROFILE:
 203                 if (!params[0]) {
 204                         fprintf(stderr,"MSG_PROFILE needs a parameter\n");
 205                         return(False);
 206                 }
 207                 if (strequal(params[0], "off")) {
 208                         v = 0;
 209                 } else if (strequal(params[0], "count")) {
 210                         v = 1;
 211                 } else if (strequal(params[0], "on")) {
 212                         v = 2;
 213                 } else if (strequal(params[0], "flush")) {
 214                         v = 3;
 215                 } else {
 216                     fprintf(stderr,
 217                         "MSG_PROFILE parameter must be off, count, on, or flush\n");
 218                     return(False);
 219                 }
 220                 send_message(dest, MSG_PROFILE, &v, sizeof(int), False);
 221                 break;
 222
 223         case MSG_FORCE_ELECTION:
 224                 if (!strequal(dest, "nmbd")) {
 225                         fprintf(stderr,"force-election can only be sent to nmbd\n");
 226                         return(False);
 227                 }
 228                 send_message(dest, MSG_FORCE_ELECTION, NULL, 0, False);
 229                 break;
 230
 231         case MSG_REQ_PROFILELEVEL:
 232                 if (!profilelevel_registered) {
 233                     message_register(MSG_PROFILELEVEL, profilelevel_function);
 234                     profilelevel_registered = True;
 235                 }
 236                 got_level = False;
 237                 retval = send_message(dest, MSG_REQ_PROFILELEVEL, NULL, 0, True);
 238                 if (retval) {
 239                         timeout_start = time(NULL);
 240                         while (!got_level) {
 241                                 message_dispatch();
 242                                 if ((time(NULL) - timeout_start) > MAX_WAIT) {
 243                                         fprintf(stderr,"profilelevel timeout\n");
 244                                         break;
 245                                 }
 246                         }
 247                 }
 248                 break;
 249
 250         case MSG_REQ_DEBUGLEVEL:
 251                 if (!debuglevel_registered) {
 252                     message_register(MSG_DEBUGLEVEL, debuglevel_function);
 253                     debuglevel_registered = True;
 254                 }
 255                 got_level = False;
 256                 retval = send_message(dest, MSG_REQ_DEBUGLEVEL, NULL, 0, True);
 257                 if (retval) {
 258                         timeout_start = time(NULL);
 259                         while (!got_level) {
 260                                 message_dispatch();
 261                                 if ((time(NULL) - timeout_start) > MAX_WAIT) {
 262                                         fprintf(stderr,"debuglevel timeout\n");
 263                                         break;
 264                                 }
 265                         }
 266                 }
 267                 break;
 268
 269         case MSG_PRINTER_NOTIFY:
 270                 if (!strequal(dest, "smbd")) {
 271                         fprintf(stderr,"printer-notify can only be sent to smbd\n");
 272                         return(False);
 273                 }
 274                 if (!params[0]) {
 275                         fprintf(stderr, "printer-notify needs a printer name\n");
 276                         return (False);
 277                 }
 278                 retval = send_message(dest, MSG_PRINTER_NOTIFY, params[0],
 279                                       strlen(params[0]) + 1, False);
 280                 break;
 281
 282         case MSG_PING:
 283                 if (!pong_registered) {
 284                     message_register(MSG_PONG, pong_function);
 285                     pong_registered = True;
 286                 }
 287                 if (!params[0]) {
 288                         fprintf(stderr,"MSG_PING needs a parameter\n");
 289                         return(False);
 290                 }
 291                 n = atoi(params[0]);
 292                 pong_count = 0;
 293                 for (i=0;i<n;i++) {
 294                         retval = send_message(dest, MSG_PING, NULL, 0, True);
 295                         if (retval == False) break;
 296                 }
 297                 if (retval) {
 298                         timeout_start = time(NULL);
 299                         while (pong_count < n) {
 300                                 message_dispatch();
 301                                 if ((time(NULL) - timeout_start) > MAX_WAIT) {
 302                                         fprintf(stderr,"PING timeout\n");
 303                                         break;
 304                                 }
 305                         }
 306                 }
 307                 break;
 308
 309         }
 310
 311         return (True);
 312 }
 313
 314  int main(int argc, char *argv[])
 315 {
 316         int opt;
 317         char temp[255];
 318         extern int optind;
 319         pstring servicesf = CONFIGFILE;
 320         BOOL interactive = False;
 321
 322         TimeInit();
 323         setup_logging(argv[0],True);
 324
 325         charset_initialise();
 326         lp_load(servicesf,False,False,False);
 327
 328         if (!message_init()) exit(1);
 329
 330         if (argc < 2) usage(True);
 331
 332         while ((opt = getopt(argc, argv,"i")) != EOF) {
 333                 switch (opt) {
 334                 case 'i':
 335                         interactive = True;
 336                         break;
 337                 default:
 338                         printf("Unknown option %c (%d)\n", (char)opt, opt);
 339                         usage(True);
 340                 }
 341         }
 342
 343         argc -= optind;
 344         argv = &argv[optind];
 345
 346         if (!interactive) {
 347                 if (argc < 2) usage(True);
 348                 return (do_command(argv[0],argv[1],argc > 2 ? &argv[2] : 0));
 349         }
 350
 351         while (True) {
 352                 char *myargv[3];
 353                 int myargc;
 354
 355                 printf("smbcontrol> ");
 356                 if (!fgets(temp, sizeof(temp)-1, stdin)) break;
 357                 myargc = 0;
 358                 while ((myargc < 3) &&
 359                        (myargv[myargc] = strtok(myargc?NULL:temp," \t\n"))) {
 360                         myargc++;
 361                 }
 362                 if (!myargc) break;
 363                 if (strequal(myargv[0],"q")) break;
 364                 if (myargc < 2)
 365                         usage(False);
 366                 else if (!do_command(myargv[0],myargv[1],myargc > 2 ? &myargv[2] : 0))
 367                         usage(False);
 368         }
 369         return(0);
 370 }
 371