pegasus/src/Service/ServerProcessUnix.cpp - annotate

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1 h.sterling 1.1 //%2005//////////////////////////////////////////////////////////////////////// 2 // 3 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development 4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. 5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.; 6 // IBM Corp.; EMC Corporation, The Open Group. 7 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; 8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. 9 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; 10 // EMC Corporation; VERITAS Software Corporation; The Open Group. 11 // 12 // Permission is hereby granted, free of charge, to any person obtaining a copy 13 // of this software and associated documentation files (the "Software"), to 14 // deal in the Software without restriction, including without limitation the 15 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 16 // sell copies of the Software, and to permit persons to whom the Software is 17 // furnished to do so, subject to the following conditions: 18 // 19 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN 20 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED 21 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT 22 h.sterling 1.1 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 23 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 24 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 25 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 27 // 28 //============================================================================== 29 // 30 // Author: Mike Day (mdday@us.ibm.com) 31 // 32 // Modified By: Jenny Yu, Hewlett-Packard Company (jenny_yu@hp.com) 33 // Yi Zhou, Hewlett-Packard Company (yi_zhou@hp.com) 34 // Marek Szermutzky, IBM (ddt6szer@de.ibm.com) 35 //%///////////////////////////////////////////////////////////////////////////// 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 #if defined(PEGASUS_OS_HPUX) 39 #include <sys/pstat.h> 40 #endif 41 #include <fcntl.h> 42 #include <unistd.h> 43 h.sterling 1.1 #include <Pegasus/Common/Signal.h> 44 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 45 #include <sys/ps.h> 46 #endif
47 w.otsuka 1.4 #define MAX_WAIT_TIME 240
48 h.sterling 1.1 #if defined(PEGASUS_OS_AIX) 49 extern "C" { 50 #include <procinfo.h> 51 extern int getprocs(struct procsinfo , int, struct fdsinfo , int,pid_t *,int); 52 #define PROCSIZE sizeof(struct procsinfo) 53 } 54 #endif 55 56 PEGASUS_USING_PEGASUS; 57 PEGASUS_USING_STD; 58 59 Boolean handleSigUsr1 = false; 60 Boolean graveError = false; 61 62 pid_t server_pid;
63 h.sterling 1.3 Uint32 parentPid = 0;
64 h.sterling 1.1 65 void sigUsr1Handler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 66 { 67 handleSigUsr1 = true; 68 } 69 70 void sigTermHandler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 71 { 72 graveError= handleSigUsr1=true; 73 } 74 75 76 //constructor 77 ServerProcess::ServerProcess() {} 78 79 //destructor 80 ServerProcess::~ServerProcess() {} 81 82 // no-ops 83 void ServerProcess::cimserver_set_process(void* p) {} 84 void ServerProcess::cimserver_exitRC(int rc) {} 85 h.sterling 1.1 int ServerProcess::cimserver_initialize(void) { return 1; } 86 int ServerProcess::cimserver_wait(void) { return 1; } 87 String ServerProcess::getHome(void) { return String::EMPTY; } 88 89 // daemon_init , RW Stevens, "Advance UNIX Programming" 90 91 int ServerProcess::cimserver_fork(void) 92 { 93 getSigHandle()->registerHandler(PEGASUS_SIGUSR1, sigUsr1Handler); 94 getSigHandle()->activate(PEGASUS_SIGUSR1); 95 getSigHandle()->registerHandler(SIGTERM, sigTermHandler); 96 getSigHandle()->activate(SIGTERM); 97 98 pid_t pid; 99 if( (pid = fork() ) < 0) 100 { 101 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 102 getSigHandle()->deactivate(SIGTERM); 103 return(-1); 104 } 105 else if (pid != 0) 106 h.sterling 1.1 { 107 // 108 // parent wait for child 109 // if there is a problem with signal, parent process terminates 110 // when waitTime expires 111 // 112 Uint32 waitTime = MAX_WAIT_TIME; 113 114 while(!handleSigUsr1 && waitTime > 0) 115 { 116 sleep(1); 117 waitTime--; 118 }
119 w.otsuka 1.4 if( !handleSigUsr1 ) 120 { 121 MessageLoaderParms parms("src.Service.ServerProcessUnix.CIMSERVER_START_TIMEOUT", 122 "The cimserver command timed out waiting for the CIM server to start."); 123 PEGASUS_STD(cerr) << MessageLoader::getMessage(parms) << PEGASUS_STD(endl); 124 }
125 h.sterling 1.1 exit(graveError); 126 } 127 128 setsid(); 129 umask(0); 130 131 // get the pid of the cimserver process 132 server_pid = getpid(); 133 return(0); 134 } 135 136 long ServerProcess::get_server_pid() 137 { 138 return server_pid; 139 } 140
141 h.sterling 1.3 void ServerProcess::set_parent_pid(int pid) 142 { 143 parentPid = pid; 144 } 145 146
147 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
148 h.sterling 1.1 149 //=========================================================================== 150 // NAME : verify_process_name 151 // DESCRIPTION : Opens the 'stat' file in the /proc/<pid> directory to 152 // verify that the process name is that of the cimserver. 153 //=========================================================================== 154 int verify_process_name(char directory, const char server_process_name) 155 { 156 static char filename[80]; 157 static char buffer[512]; 158 int fd, bytesRead; 159 160 // generate the name of the stat file in the process's /proc directory, 161 // and open it 162 sprintf(filename, "%s/%s", directory, "stat"); 163 if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) 164 { 165 return -1; 166 } 167 168 // read the contents 169 h.sterling 1.1 if ( (bytesRead = read( fd, buffer, (sizeof buffer) - 1 )) <= 0 ) 170 { 171 close(fd); 172 return -1; 173 } 174 175 // null terminate the file contents 176 buffer[bytesRead] = 0; 177 178 close(fd); 179 180 // the process name is the second element of the file contents and 181 // is surrounded by parentheses. 182 // 183 // find the positions of the parentheses in the file contents 184 char * open_paren; 185 char * close_paren; 186 187 open_paren = strchr (buffer, '('); 188 close_paren = strchr (buffer, ')'); 189 if (open_paren == NULL \|\| close_paren == NULL \|\| close_paren < open_paren) 190 h.sterling 1.1 { 191 return -1; 192 } 193 194 // allocate memory for the result 195 char * process_name; 196 process_name = (char*) malloc(close_paren - open_paren - 1); 197 198 // copy the process name into the result 199 strncpy (process_name, open_paren + 1, close_paren - open_paren -1); 200 201 // strncpy doesn't NULL-terminate the result, so do it here 202 process_name[close_paren - open_paren -1] = '\0'; 203 204 if (strcmp(process_name, server_process_name) != 0) 205 { 206 return -1; 207 } 208 209 return 0; 210 } 211 h.sterling 1.1 212 //============================================================================= 213 // NAME : get_proc 214 // DESCRIPTION : get_proc() makes a stat() system call on the directory in 215 // /proc with a name that matches the pid of the cimserver. 216 // It returns 0 if it successfully located the process dir 217 // and verified that the process name matches that of the 218 // cimserver. It returns -1 if it fails to open /proc, or 219 // the cimserver process does not exist. 220 //============================================================================= 221 int ServerProcess::get_proc(int pid) 222 { 223 static char path[32]; 224 static struct stat stat_buff; 225 226 sprintf(path, "/proc/%d", pid); 227 if (stat(path, &stat_buff) == -1) // process stopped running 228 { 229 return -1; 230 } 231 232 h.sterling 1.1 // get the process name to make sure it is the cimserver process 233 // ATTN: skip verify for Solaris
234 jim.wunderlich 1.5 #if !defined(PEGASUS_OS_SOLARIS)
235 h.sterling 1.1 if ((verify_process_name(path, getProcessName())) == -1) 236 { 237 return -1; 238 } 239 #endif 240 241 // 242 // Check to see if this command process has the same pid as the cimserver 243 // daemon process pid stored in the cimserver_start.conf file. Since the 244 // command has the same name as the cimserver daemon process, this could 245 // happen after a system reboot. If the pids are the same, cimserver 246 // isn't really running. 247 // 248 Uint32 mypid = System::getPID(); 249 if ((mypid == (unsigned)pid) \|\| ((unsigned)parentPid == (unsigned)pid)) 250 { 251 return -1; 252 } 253 return 0; 254 } 255 #endif 256 h.sterling 1.1 257 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 258 Boolean isProcRunning(pid_t pid) 259 { 260 W_PSPROC buf; 261 int token = 0; 262 memset(&buf, 0x00, sizeof(buf)); 263 buf.ps_conttyptr =(char ) malloc(buf.ps_conttylen =PS_CONTTYBLEN); 264 buf.ps_pathptr =(char ) malloc(buf.ps_pathlen =PS_PATHBLEN); 265 buf.ps_cmdptr =(char ) malloc(buf.ps_cmdlen =PS_CMDBLEN); 266 267 token = w_getpsent(token, &buf, sizeof(buf)); 268 do { 269 token = w_getpsent(token, &buf, sizeof(buf)); 270 if (buf.ps_pid==pid) { 271 free(buf.ps_conttyptr); 272 free(buf.ps_pathptr); 273 free(buf.ps_cmdptr); 274 return true; 275 } 276 } while(token>0); 277 h.sterling 1.1 278 free(buf.ps_conttyptr); 279 free(buf.ps_pathptr); 280 free(buf.ps_cmdptr); 281 return false; 282 } 283 #endif 284 285 #if defined(PEGASUS_OS_AIX) 286 287 ///////////////////////////////////////////////////////////////////////////// 288 // NAME : processdata 289 // FUNCTION : it calls subroutine getprocs() to get information 290 // about all processes. 291 ///////////////////////////////////////////////////////////////////////////// 292 // ARGUMENTS: 293 // cnt: the number of the processes in the returned table 294 // RETURN VALUES: 295 // when it successfully gets the process table entries, 296 // an array of procsinfo structures filled with process table 297 // entries are returned. Otherewise, a null pointer is 298 h.sterling 1.1 // returned. 299 // 300 ///////////////////////////////////////////////////////////////////////////// 301 struct procsinfo processdata(int cnt) 302 { 303 struct procsinfo proctable=NULL, rtnp=NULL; 304 int count=1048576, rtncnt, repeat=1, nextp=0; 305 306 cnt=0; 307 while ( repeat && (rtncnt=getprocs(rtnp,PROCSIZE,0,0,&nextp, count))>0) 308 { 309 if (!rtnp) 310 { 311 count=rtncnt; 312 proctable=(struct procsinfo ) malloc((size_t) \ 313 PROCSIZEcount); 314 if (!proctable) 315 return NULL; 316 rtnp=proctable; 317 nextp=0; 318 } else 319 h.sterling 1.1 { 320 cnt+=rtncnt; 321 if (rtncnt>=count) 322 { 323 proctable=(struct procsinfo ) realloc(\ 324 (void)proctable, (size_t)\ 325 (PROCSIZE(cnt+count))); 326 if (!proctable) 327 return NULL; 328 rtnp=proctable+(cnt); 329 } else 330 repeat=0; 331 } // end of if(!rtnp) 332 } //end of while 333 return proctable; 334 } 335 336 ///////////////////////////////////////////////////////////////////////////// 337 // NAME : aixcimsrvrunning 338 // FUNCTION : it figures out if the cimserver process is running 339 // by checking the process table entries in the array 340 h.sterling 1.1 // returned from processdata(). If the cimserver process is 341 // running and its pid is the same as the pid in the file 342 // getPIDFileName(), it will return 0, otherwise it will 343 // return -1. 344 ///////////////////////////////////////////////////////////////////////////// 345 // ARGUMENTS: 346 // pid: the process identifier saved in the file 347 // getPIDFileName() 348 // RETURN VALUES: 349 // 0: successful 350 // -1: errors 351 // 352 ///////////////////////////////////////////////////////////////////////////// 353
354 h.sterling 1.2 int aixcimsrvrunning(pid_t pid, const char* processName)
355 h.sterling 1.1 { 356 int i,count; 357 struct procsinfo *proctable; 358 359 proctable=processdata(&count); 360 if (proctable==NULL) 361 return -1; 362 for (i=0;i<count;i++)
363 h.sterling 1.2 if (!strcmp(proctable[i].pi_comm, processName) && \
364 h.sterling 1.1 proctable[i].pi_pid==pid) 365 { 366 free(proctable); 367 return 0; 368 } 369 370 free(proctable); 371 return -1; 372 } 373 #endif 374 375 Boolean ServerProcess::isCIMServerRunning(void) 376 { 377 FILE *pid_file; 378 pid_t pid = 0; 379 380 // open the file containing the CIMServer process ID 381 pid_file = fopen(getPIDFileName(), "r"); 382 if (!pid_file) 383 { 384 return false; 385 h.sterling 1.1 } 386 387 // get the pid from the file 388 fscanf(pid_file, "%d\n", &pid); 389 390 fclose(pid_file); 391 392 if (pid == 0) 393 { 394 return false; 395 } 396 397 // 398 // check to see if cimserver process is alive 399 // 400 #if defined(PEGASUS_OS_HPUX) 401 struct pst_status pstru; 402 403 int ret_code; 404 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 405 406 h.sterling 1.1 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 407 { 408 // 409 // Check to see if this command process has the same pid as the 410 // cimserver daemon process pid stored in the cimserver_start.conf 411 // file. Since the command has the same name as the cimserver daemon 412 // process, this could happen after a system reboot. If the pids are 413 // the same, cimserver isn't really running. 414 // 415 Uint32 mypid = System::getPID(); 416 if ((mypid != pid) && (parentPid != pid)) 417 { 418 // cimserver is running 419 return true; 420 } 421 } 422 #endif
423 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
424 h.sterling 1.1 if (get_proc(pid) != -1 ) 425 { 426 // cimserver is running 427 return true; 428 } 429 #endif 430 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 431 return isProcRunning(pid); 432 #endif 433 #if defined(PEGASUS_OS_AIX)
434 h.sterling 1.2 if (aixcimsrvrunning(pid, getProcessName())!=-1)
435 h.sterling 1.1 return true; 436 #endif 437 return false; 438 } 439 440 int ServerProcess::cimserver_kill(int id) 441 { 442 FILE *pid_file; 443 pid_t pid = 0; 444 445 // open the file containing the CIMServer process ID 446 pid_file = fopen(getPIDFileName(), "r"); 447 if (!pid_file) 448 { 449 return (-1); 450 } 451 452 // get the pid from the file 453 fscanf(pid_file, "%d\n", &pid); 454 455 fclose(pid_file); 456 h.sterling 1.1 457 if (pid == 0) 458 { 459 System::removeFile(getPIDFileName()); 460 return (-1); 461 } 462 463 // 464 // kill the process if it is still alive 465 // 466 #if defined(PEGASUS_OS_HPUX) 467 struct pst_status pstru; 468 469 int ret_code; 470 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 471 472 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 473 { 474 // cimserver is running, kill the process 475 kill(pid, SIGKILL); 476 } 477 h.sterling 1.1 #endif
478 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
479 h.sterling 1.1 if (get_proc(pid) != -1 ) 480 { 481 kill(pid, SIGKILL); 482 } 483 #endif 484 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 485 if (isProcRunning(pid)) { 486 kill(pid, SIGKILL); 487 } 488 #endif 489 #if defined(PEGASUS_OS_AIX)
490 h.sterling 1.2 if (!aixcimsrvrunning(pid, getProcessName()))
491 h.sterling 1.1 kill(pid,SIGKILL); 492 #endif 493 // remove the file 494 System::removeFile(getPIDFileName()); 495 496 return(0); 497 } 498 499 // notify parent process to terminate so user knows that cimserver 500 // is ready to serve CIM requests. 501 void ServerProcess::notify_parent(int id) 502 { 503 pid_t ppid = getppid(); 504 if (id) 505 kill(ppid, SIGTERM); 506 else 507 kill(ppid, PEGASUS_SIGUSR1); 508 } 509 510 511 // Platform specific run 512 h.sterling 1.1 int ServerProcess::platform_run( int argc, char** argv, Boolean shutdownOption ) 513 { 514 return cimserver_run( argc, argv, shutdownOption ); 515 } 516 517 518 519 520 521

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