pegasus/src/Service/ServerProcessUnix.cpp - annotate

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1 karl 1.8 //%2006////////////////////////////////////////////////////////////////////////
2 h.sterling 1.1 // 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 karl 1.8 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.; 12 // EMC Corporation; Symantec Corporation; The Open Group.
13 h.sterling 1.1 // 14 // Permission is hereby granted, free of charge, to any person obtaining a copy 15 // of this software and associated documentation files (the "Software"), to 16 // deal in the Software without restriction, including without limitation the 17 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 18 // sell copies of the Software, and to permit persons to whom the Software is 19 // furnished to do so, subject to the following conditions: 20 // 21 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN 22 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED 23 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT 24 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 25 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 26 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 27 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 29 // 30 //============================================================================== 31 // 32 // Author: Mike Day (mdday@us.ibm.com) 33 // 34 h.sterling 1.1 // Modified By: Jenny Yu, Hewlett-Packard Company (jenny_yu@hp.com) 35 // Yi Zhou, Hewlett-Packard Company (yi_zhou@hp.com) 36 // Marek Szermutzky, IBM (ddt6szer@de.ibm.com) 37 //%///////////////////////////////////////////////////////////////////////////// 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #if defined(PEGASUS_OS_HPUX) 41 #include <sys/pstat.h>
42 mateus.baur 1.11.18.1 #include <libgen.h>
43 h.sterling 1.1 #endif 44 #include <fcntl.h> 45 #include <unistd.h> 46 #include <Pegasus/Common/Signal.h>
47 mike 1.11 #include <Pegasus/Common/AutoPtr.h>
48 h.sterling 1.1 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 49 #include <sys/ps.h> 50 #endif
51 w.otsuka 1.4 #define MAX_WAIT_TIME 240
52 h.sterling 1.1 #if defined(PEGASUS_OS_AIX) 53 extern "C" { 54 #include <procinfo.h> 55 extern int getprocs(struct procsinfo , int, struct fdsinfo , int,pid_t *,int); 56 #define PROCSIZE sizeof(struct procsinfo) 57 } 58 #endif 59 60 PEGASUS_USING_PEGASUS; 61 PEGASUS_USING_STD; 62 63 Boolean handleSigUsr1 = false; 64 Boolean graveError = false; 65
66 r.kieninger 1.9 // the current pid is the server pid. After fork it is overwritten. 67 pid_t server_pid = getpid();
68 h.sterling 1.3 Uint32 parentPid = 0;
69 h.sterling 1.1 70 void sigUsr1Handler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 71 { 72 handleSigUsr1 = true; 73 } 74 75 void sigTermHandler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 76 { 77 graveError= handleSigUsr1=true; 78 } 79 80 81 //constructor 82 ServerProcess::ServerProcess() {} 83 84 //destructor 85 ServerProcess::~ServerProcess() {} 86 87 // no-ops 88 void ServerProcess::cimserver_set_process(void* p) {} 89 void ServerProcess::cimserver_exitRC(int rc) {} 90 h.sterling 1.1 int ServerProcess::cimserver_initialize(void) { return 1; }
91 marek 1.10 92 // for all OSes supporting signals provide a cimserver_wait function 93 // that waits to be awakened by signal PEGASUS_SIGTERM or PEGASUS_SIGHUP 94 #ifdef PEGASUS_HAS_SIGNALS 95 int ServerProcess::cimserver_wait(void) 96 { 97 int sig = -1; 98 sigset_t set; 99 sigemptyset(&set); 100 sigaddset(&set, PEGASUS_SIGTERM); 101 sigaddset(&set, PEGASUS_SIGHUP); 102 errno = 0; 103 do 104 { 105 #if defined(PEGASUS_OS_ZOS) \|\| defined(PEGASUS_OS_SOLARIS) 106 sig = sigwait(&set); 107 #else // else for platforms = LINUX, HPUX, AIX 108 sigwait(&set, &sig); 109 #endif 110 } while (errno == EINTR); 111 return sig; 112 marek 1.10 } 113 #else
114 h.sterling 1.1 int ServerProcess::cimserver_wait(void) { return 1; }
115 marek 1.10 #endif 116
117 h.sterling 1.1 String ServerProcess::getHome(void) { return String::EMPTY; } 118 119 // daemon_init , RW Stevens, "Advance UNIX Programming" 120 121 int ServerProcess::cimserver_fork(void) 122 { 123 getSigHandle()->registerHandler(PEGASUS_SIGUSR1, sigUsr1Handler); 124 getSigHandle()->activate(PEGASUS_SIGUSR1); 125 getSigHandle()->registerHandler(SIGTERM, sigTermHandler); 126 getSigHandle()->activate(SIGTERM); 127 128 pid_t pid; 129 if( (pid = fork() ) < 0) 130 { 131 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 132 getSigHandle()->deactivate(SIGTERM); 133 return(-1); 134 } 135 else if (pid != 0) 136 { 137 // 138 h.sterling 1.1 // parent wait for child 139 // if there is a problem with signal, parent process terminates 140 // when waitTime expires 141 // 142 Uint32 waitTime = MAX_WAIT_TIME; 143 144 while(!handleSigUsr1 && waitTime > 0) 145 { 146 sleep(1); 147 waitTime--; 148 }
149 w.otsuka 1.4 if( !handleSigUsr1 ) 150 { 151 MessageLoaderParms parms("src.Service.ServerProcessUnix.CIMSERVER_START_TIMEOUT", 152 "The cimserver command timed out waiting for the CIM server to start."); 153 PEGASUS_STD(cerr) << MessageLoader::getMessage(parms) << PEGASUS_STD(endl); 154 }
155 h.sterling 1.1 exit(graveError); 156 } 157 158 setsid();
159 marek 1.10 umask(S_IRWXG \| S_IRWXO ); 160 161 // spawned daemon process doesn't need the old signal handlers of its parent 162 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 163 getSigHandle()->deactivate(SIGTERM);
164 h.sterling 1.1 165 // get the pid of the cimserver process 166 server_pid = getpid(); 167 return(0); 168 } 169 170 long ServerProcess::get_server_pid() 171 { 172 return server_pid; 173 } 174
175 h.sterling 1.3 void ServerProcess::set_parent_pid(int pid) 176 { 177 parentPid = pid; 178 } 179 180
181 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
182 h.sterling 1.1 183 //=========================================================================== 184 // NAME : verify_process_name 185 // DESCRIPTION : Opens the 'stat' file in the /proc/<pid> directory to 186 // verify that the process name is that of the cimserver. 187 //=========================================================================== 188 int verify_process_name(char directory, const char server_process_name) 189 { 190 static char filename[80]; 191 static char buffer[512]; 192 int fd, bytesRead; 193 194 // generate the name of the stat file in the process's /proc directory, 195 // and open it 196 sprintf(filename, "%s/%s", directory, "stat"); 197 if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) 198 { 199 return -1; 200 } 201 202 // read the contents 203 h.sterling 1.1 if ( (bytesRead = read( fd, buffer, (sizeof buffer) - 1 )) <= 0 ) 204 { 205 close(fd); 206 return -1; 207 } 208 209 // null terminate the file contents 210 buffer[bytesRead] = 0; 211 212 close(fd); 213 214 // the process name is the second element of the file contents and 215 // is surrounded by parentheses. 216 // 217 // find the positions of the parentheses in the file contents 218 char * open_paren; 219 char * close_paren; 220 221 open_paren = strchr (buffer, '('); 222 close_paren = strchr (buffer, ')'); 223 if (open_paren == NULL \|\| close_paren == NULL \|\| close_paren < open_paren) 224 h.sterling 1.1 { 225 return -1; 226 } 227 228 // allocate memory for the result
229 kumpf 1.6 AutoArrayPtr<char> process_name(new char[close_paren - open_paren]);
230 h.sterling 1.1 231 // copy the process name into the result
232 kumpf 1.6 strncpy (process_name.get(), open_paren + 1, close_paren - open_paren -1);
233 h.sterling 1.1 234 // strncpy doesn't NULL-terminate the result, so do it here
235 kumpf 1.6 process_name.get()[close_paren - open_paren -1] = '\0';
236 h.sterling 1.1
237 kumpf 1.6 if (strcmp(process_name.get(), server_process_name) != 0)
238 h.sterling 1.1 { 239 return -1; 240 } 241 242 return 0; 243 } 244 245 //============================================================================= 246 // NAME : get_proc 247 // DESCRIPTION : get_proc() makes a stat() system call on the directory in 248 // /proc with a name that matches the pid of the cimserver. 249 // It returns 0 if it successfully located the process dir 250 // and verified that the process name matches that of the 251 // cimserver. It returns -1 if it fails to open /proc, or 252 // the cimserver process does not exist. 253 //============================================================================= 254 int ServerProcess::get_proc(int pid) 255 { 256 static char path[32]; 257 static struct stat stat_buff; 258 259 h.sterling 1.1 sprintf(path, "/proc/%d", pid); 260 if (stat(path, &stat_buff) == -1) // process stopped running 261 { 262 return -1; 263 } 264 265 // get the process name to make sure it is the cimserver process 266 // ATTN: skip verify for Solaris
267 jim.wunderlich 1.5 #if !defined(PEGASUS_OS_SOLARIS)
268 h.sterling 1.1 if ((verify_process_name(path, getProcessName())) == -1) 269 { 270 return -1; 271 } 272 #endif 273 274 // 275 // Check to see if this command process has the same pid as the cimserver 276 // daemon process pid stored in the cimserver_start.conf file. Since the 277 // command has the same name as the cimserver daemon process, this could 278 // happen after a system reboot. If the pids are the same, cimserver 279 // isn't really running. 280 // 281 Uint32 mypid = System::getPID(); 282 if ((mypid == (unsigned)pid) \|\| ((unsigned)parentPid == (unsigned)pid)) 283 { 284 return -1; 285 } 286 return 0; 287 } 288 #endif 289 h.sterling 1.1 290 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 291 Boolean isProcRunning(pid_t pid) 292 { 293 W_PSPROC buf; 294 int token = 0; 295 memset(&buf, 0x00, sizeof(buf)); 296 buf.ps_conttyptr =(char ) malloc(buf.ps_conttylen =PS_CONTTYBLEN); 297 buf.ps_pathptr =(char ) malloc(buf.ps_pathlen =PS_PATHBLEN); 298 buf.ps_cmdptr =(char *) malloc(buf.ps_cmdlen =PS_CMDBLEN); 299
300 marek 1.11.18.2 while((token = w_getpsent(token, &buf, sizeof(buf))) > 0) 301 { 302 if (buf.ps_pid==pid) 303 { 304 // If the process id is associated with the program 305 // "cimserver", then a cimserver is still running. 306 if (strstr(buf.ps_pathptr,"cimserver")!= NULL ) 307 {
308 h.sterling 1.1 free(buf.ps_conttyptr); 309 free(buf.ps_pathptr); 310 free(buf.ps_cmdptr); 311 return true; 312 }
313 marek 1.11.18.2 // pid found was not associated with a cimserver 314 break; 315 } 316 }
317 h.sterling 1.1 318 free(buf.ps_conttyptr); 319 free(buf.ps_pathptr); 320 free(buf.ps_cmdptr); 321 return false; 322 } 323 #endif 324 325 #if defined(PEGASUS_OS_AIX) 326 327 ///////////////////////////////////////////////////////////////////////////// 328 // NAME : processdata 329 // FUNCTION : it calls subroutine getprocs() to get information 330 // about all processes. 331 ///////////////////////////////////////////////////////////////////////////// 332 // ARGUMENTS: 333 // cnt: the number of the processes in the returned table 334 // RETURN VALUES: 335 // when it successfully gets the process table entries, 336 // an array of procsinfo structures filled with process table 337 // entries are returned. Otherewise, a null pointer is 338 h.sterling 1.1 // returned. 339 // 340 ///////////////////////////////////////////////////////////////////////////// 341 struct procsinfo processdata(int cnt) 342 { 343 struct procsinfo proctable=NULL, rtnp=NULL; 344 int count=1048576, rtncnt, repeat=1, nextp=0; 345 346 cnt=0; 347 while ( repeat && (rtncnt=getprocs(rtnp,PROCSIZE,0,0,&nextp, count))>0) 348 { 349 if (!rtnp) 350 { 351 count=rtncnt; 352 proctable=(struct procsinfo ) malloc((size_t) \ 353 PROCSIZEcount); 354 if (!proctable) 355 return NULL; 356 rtnp=proctable; 357 nextp=0; 358 } else 359 h.sterling 1.1 { 360 cnt+=rtncnt; 361 if (rtncnt>=count) 362 { 363 proctable=(struct procsinfo ) realloc(\ 364 (void)proctable, (size_t)\ 365 (PROCSIZE(cnt+count))); 366 if (!proctable) 367 return NULL; 368 rtnp=proctable+(*cnt); 369 } else 370 repeat=0; 371 } // end of if(!rtnp) 372 } //end of while 373 return proctable; 374 } 375 376 ///////////////////////////////////////////////////////////////////////////// 377 // NAME : aixcimsrvrunning 378 // FUNCTION : it figures out if the cimserver process is running 379 // by checking the process table entries in the array 380 h.sterling 1.1 // returned from processdata(). If the cimserver process is 381 // running and its pid is the same as the pid in the file 382 // getPIDFileName(), it will return 0, otherwise it will 383 // return -1. 384 ///////////////////////////////////////////////////////////////////////////// 385 // ARGUMENTS: 386 // pid: the process identifier saved in the file 387 // getPIDFileName() 388 // RETURN VALUES: 389 // 0: successful 390 // -1: errors 391 // 392 ///////////////////////////////////////////////////////////////////////////// 393
394 h.sterling 1.2 int aixcimsrvrunning(pid_t pid, const char* processName)
395 h.sterling 1.1 { 396 int i,count; 397 struct procsinfo *proctable; 398 399 proctable=processdata(&count); 400 if (proctable==NULL) 401 return -1; 402 for (i=0;i<count;i++)
403 h.sterling 1.2 if (!strcmp(proctable[i].pi_comm, processName) && \
404 h.sterling 1.1 proctable[i].pi_pid==pid) 405 { 406 free(proctable); 407 return 0; 408 } 409 410 free(proctable); 411 return -1; 412 } 413 #endif 414 415 Boolean ServerProcess::isCIMServerRunning(void) 416 { 417 FILE *pid_file; 418 pid_t pid = 0; 419 420 // open the file containing the CIMServer process ID 421 pid_file = fopen(getPIDFileName(), "r"); 422 if (!pid_file) 423 { 424 return false; 425 h.sterling 1.1 } 426 427 // get the pid from the file 428 fscanf(pid_file, "%d\n", &pid); 429 430 fclose(pid_file); 431 432 if (pid == 0) 433 { 434 return false; 435 } 436 437 // 438 // check to see if cimserver process is alive 439 // 440 #if defined(PEGASUS_OS_HPUX) 441 struct pst_status pstru; 442 443 int ret_code; 444 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 445
446 mateus.baur 1.11.18.1 if (ret_code != -1)
447 h.sterling 1.1 { 448 //
449 mateus.baur 1.11.18.1 // Gets the command basename disregarding the command parameters
450 h.sterling 1.1 //
451 mateus.baur 1.11.18.1 char execName = strchr(pstru.pst_cmd,' '); 452 if (execName) 453 { 454 execName = '\0'; 455 } 456 execName = basename(pstru.pst_cmd); 457 458 if (strcmp(execName, getProcessName()) == 0)
459 h.sterling 1.1 {
460 mateus.baur 1.11.18.1 // 461 // Check to see if this command process has the same pid as the 462 // cimserver daemon process pid stored in the cimserver_start.conf 463 // file. Since the command has the same name as the cimserver daemon 464 // process, this could happen after a system reboot. If the pids are 465 // the same, cimserver isn't really running. 466 // 467 Uint32 mypid = System::getPID(); 468 if ((mypid != pid) && (parentPid != pid)) 469 { 470 // cimserver is running 471 return true; 472 }
473 h.sterling 1.1 } 474 } 475 #endif
476 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
477 h.sterling 1.1 if (get_proc(pid) != -1 ) 478 { 479 // cimserver is running 480 return true; 481 } 482 #endif 483 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 484 return isProcRunning(pid); 485 #endif 486 #if defined(PEGASUS_OS_AIX)
487 h.sterling 1.2 if (aixcimsrvrunning(pid, getProcessName())!=-1)
488 h.sterling 1.1 return true; 489 #endif 490 return false; 491 } 492 493 int ServerProcess::cimserver_kill(int id) 494 { 495 FILE *pid_file; 496 pid_t pid = 0; 497 498 // open the file containing the CIMServer process ID 499 pid_file = fopen(getPIDFileName(), "r"); 500 if (!pid_file) 501 { 502 return (-1); 503 } 504 505 // get the pid from the file 506 fscanf(pid_file, "%d\n", &pid); 507 508 fclose(pid_file); 509 h.sterling 1.1 510 if (pid == 0) 511 { 512 System::removeFile(getPIDFileName()); 513 return (-1); 514 } 515 516 // 517 // kill the process if it is still alive 518 // 519 #if defined(PEGASUS_OS_HPUX) 520 struct pst_status pstru; 521 522 int ret_code; 523 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 524 525 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 526 { 527 // cimserver is running, kill the process 528 kill(pid, SIGKILL); 529 } 530 h.sterling 1.1 #endif
531 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
532 h.sterling 1.1 if (get_proc(pid) != -1 ) 533 { 534 kill(pid, SIGKILL); 535 } 536 #endif 537 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 538 if (isProcRunning(pid)) { 539 kill(pid, SIGKILL); 540 } 541 #endif 542 #if defined(PEGASUS_OS_AIX)
543 h.sterling 1.2 if (!aixcimsrvrunning(pid, getProcessName()))
544 h.sterling 1.1 kill(pid,SIGKILL); 545 #endif 546 // remove the file 547 System::removeFile(getPIDFileName()); 548 549 return(0); 550 } 551 552 // notify parent process to terminate so user knows that cimserver 553 // is ready to serve CIM requests. 554 void ServerProcess::notify_parent(int id) 555 { 556 pid_t ppid = getppid(); 557 if (id) 558 kill(ppid, SIGTERM); 559 else 560 kill(ppid, PEGASUS_SIGUSR1); 561 } 562 563 564 // Platform specific run
565 kumpf 1.7 int ServerProcess::platform_run( 566 int argc, 567 char** argv, 568 Boolean shutdownOption, 569 Boolean debugOutputOption)
570 h.sterling 1.1 {
571 kumpf 1.7 return cimserver_run(argc, argv, shutdownOption, debugOutputOption);
572 h.sterling 1.1 }

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