source3/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 #define NO_SYSLOG
  23
  24 #include "includes.h"
  25
  26 static struct {
  27         char *name;
  28         int value;
  29 } msg_types[] = {
  30         {"debug", MSG_DEBUG},
  31         {"force-election", MSG_FORCE_ELECTION},
  32         {"ping", MSG_PING},
  33         {"profile", MSG_PROFILE},
  34         {"debuglevel", MSG_REQ_DEBUGLEVEL},
  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
  64
  65 /****************************************************************************
  66 a useful function for testing the message system
  67 ****************************************************************************/
  68 void pong_function(int msg_type, pid_t src, void *buf, size_t len)
  69 {
  70         pong_count++;
  71         printf("PONG from PID %d\n",src);
  72 }
  73
  74 /****************************************************************************
  75 Prints out the current Debug level returned by MSG_DEBUGLEVEL
  76 ****************************************************************************/
  77 void debuglevel_function(int msg_type, pid_t src, void *buf, size_t len)
  78 {
  79         int level;
  80         memcpy(&level, buf, sizeof(int));
  81
  82         printf("Current debug level of PID %d is %d\n",src,level);
  83         got_level = True;
  84 }
  85
  86 /****************************************************************************
  87 send a message to a named destination
  88 ****************************************************************************/
  89 static BOOL send_message(char *dest, int msg_type, void *buf, int len)
  90 {
  91         pid_t pid;
  92
  93         /* "smbd" is the only broadcast operation */
  94         if (strequal(dest,"smbd")) {
  95                 return message_send_all(msg_type, buf, len);
  96         } else if (strequal(dest,"nmbd")) {
  97                 pid = pidfile_pid(dest);
  98                 if (pid == 0) {
  99                         fprintf(stderr,"Can't find pid for nmbd\n");
 100                         return False;
 101                 }
 102         } else {
 103                 pid = atoi(dest);
 104                 if (pid == 0) {
 105                         fprintf(stderr,"Not a valid pid\n");
 106                         return False;
 107                 }
 108         }
 109
 110         return message_send_pid(pid, msg_type, buf, len);
 111 }
 112
 113 /****************************************************************************
 114 evaluate a message type string
 115 ****************************************************************************/
 116 static int parse_type(char *mtype)
 117 {
 118         int i;
 119         for (i=0;msg_types[i].name;i++) {
 120                 if (strequal(mtype, msg_types[i].name)) return msg_types[i].value;
 121         }
 122         return -1;
 123 }
 124
 125
 126 /****************************************************************************
 127 do command
 128 ****************************************************************************/
 129 static BOOL do_command(char *dest, char *msg_name, char *params)
 130 {
 131         int i, n, v;
 132         int mtype;
 133         BOOL retval;
 134
 135         mtype = parse_type(msg_name);
 136         if (mtype == -1) {
 137                 fprintf(stderr,"Couldn't resolve message type: %s\n", msg_name);
 138                 return(False);
 139         }
 140
 141         switch (mtype) {
 142         case MSG_DEBUG:
 143                 if (!params) {
 144                         fprintf(stderr,"MSG_DEBUG needs a parameter\n");
 145                         return(False);
 146                 }
 147                 v = atoi(params);
 148                 send_message(dest, MSG_DEBUG, &v, sizeof(int));
 149                 break;
 150
 151         case MSG_PROFILE:
 152                 if (!params) {
 153                         fprintf(stderr,"MSG_PROFILE needs a parameter\n");
 154                         return(False);
 155                 }
 156                 if (strequal(params, "off")) {
 157                         v = 0;
 158                 } else if (strequal(params, "count")) {
 159                         v = 1;
 160                 } else if (strequal(params, "on")) {
 161                         v = 2;
 162                 } else if (strequal(params, "flush")) {
 163                         v = 3;
 164                 } else {
 165                     fprintf(stderr,
 166                         "MSG_PROFILE parameter must be off, count, on, or flush\n");
 167                     return(False);
 168                 }
 169                 send_message(dest, MSG_PROFILE, &v, sizeof(int));
 170                 break;
 171
 172         case MSG_FORCE_ELECTION:
 173                 if (!strequal(dest, "nmbd")) {
 174                         fprintf(stderr,"force-election can only be sent to nmbd\n");
 175                         return(False);
 176                 }
 177                 send_message(dest, MSG_FORCE_ELECTION, NULL, 0);
 178                 break;
 179
 180         case MSG_REQ_DEBUGLEVEL:
 181                 if (!debuglevel_registered) {
 182                     message_register(MSG_DEBUGLEVEL, debuglevel_function);
 183                     debuglevel_registered = True;
 184                 }
 185                 got_level = False;
 186                 retval = send_message(dest, MSG_REQ_DEBUGLEVEL, NULL, 0);
 187                 if (retval) {
 188                         timeout_start = time(NULL);
 189                         while (!got_level) {
 190                                 message_dispatch();
 191                                 if ((time(NULL) - timeout_start) > MAX_WAIT) {
 192                                         fprintf(stderr,"debuglevel timeout\n");
 193                                         break;
 194                                 }
 195                         }
 196                 }
 197                 break;
 198
 199         case MSG_PING:
 200                 if (!pong_registered) {
 201                     message_register(MSG_PONG, pong_function);
 202                     pong_registered = True;
 203                 }
 204                 if (!params) {
 205                         fprintf(stderr,"MSG_PING needs a parameter\n");
 206                         return(False);
 207                 }
 208                 n = atoi(params);
 209                 pong_count = 0;
 210                 for (i=0;i<n;i++) {
 211                         retval = send_message(dest, MSG_PING, NULL, 0);
 212                         if (retval == False) break;
 213                 }
 214                 if (retval) {
 215                         timeout_start = time(NULL);
 216                         while (pong_count < n) {
 217                                 message_dispatch();
 218                                 if ((time(NULL) - timeout_start) > MAX_WAIT) {
 219                                         fprintf(stderr,"PING timeout\n");
 220                                         break;
 221                                 }
 222                         }
 223                 }
 224                 break;
 225
 226         }
 227
 228         return (True);
 229 }
 230
 231  int main(int argc, char *argv[])
 232 {
 233         int opt;
 234         char temp[255];
 235         extern int optind;
 236         pstring servicesf = CONFIGFILE;
 237         BOOL interactive = False;
 238
 239         TimeInit();
 240         setup_logging(argv[0],True);
 241
 242         charset_initialise();
 243         lp_load(servicesf,False,False,False);
 244
 245         if (!message_init()) exit(1);
 246
 247         if (argc < 2) usage(True);
 248
 249         while ((opt = getopt(argc, argv,"i")) != EOF) {
 250                 switch (opt) {
 251                 case 'i':
 252                         interactive = True;
 253                         break;
 254                 default:
 255                         printf("Unknown option %c (%d)\n", (char)opt, opt);
 256                         usage(True);
 257                 }
 258         }
 259
 260         argc -= optind;
 261         argv = &argv[optind];
 262
 263         if (!interactive) {
 264                 if (argc < 2) usage(True);
 265                 return (do_command(argv[0],argv[1],argc > 2 ? argv[2] : 0));
 266         }
 267
 268         while (True) {
 269                 char *myargv[3];
 270                 int myargc;
 271
 272                 printf("smbcontrol> ");
 273                 if (!fgets(temp, sizeof(temp)-1, stdin)) break;
 274                 myargc = 0;
 275                 while ((myargc < 3) &&
 276                        (myargv[myargc] = strtok(myargc?NULL:temp," \t\n"))) {
 277                         myargc++;
 278                 }
 279                 if (!myargc) break;
 280                 if (strequal(myargv[0],"q")) break;
 281                 if (myargc < 2)
 282                         usage(False);
 283                 else if (!do_command(myargv[0],myargv[1],myargc > 2 ? myargv[2] : 0))
 284                         usage(False);
 285         }
 286         return(0);
 287 }
 288