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 token = w_getpsent(token, &buf, sizeof(buf)); 301 do { 302 token = w_getpsent(token, &buf, sizeof(buf)); 303 if (buf.ps_pid==pid) { 304 free(buf.ps_conttyptr); 305 free(buf.ps_pathptr); 306 free(buf.ps_cmdptr); 307 return true; 308 } 309 } while(token>0); 310 h.sterling 1.1 311 free(buf.ps_conttyptr); 312 free(buf.ps_pathptr); 313 free(buf.ps_cmdptr); 314 return false; 315 } 316 #endif 317 318 #if defined(PEGASUS_OS_AIX) 319 320 ///////////////////////////////////////////////////////////////////////////// 321 // NAME : processdata 322 // FUNCTION : it calls subroutine getprocs() to get information 323 // about all processes. 324 ///////////////////////////////////////////////////////////////////////////// 325 // ARGUMENTS: 326 // cnt: the number of the processes in the returned table 327 // RETURN VALUES: 328 // when it successfully gets the process table entries, 329 // an array of procsinfo structures filled with process table 330 // entries are returned. Otherewise, a null pointer is 331 h.sterling 1.1 // returned. 332 // 333 ///////////////////////////////////////////////////////////////////////////// 334 struct procsinfo processdata(int cnt) 335 { 336 struct procsinfo proctable=NULL, rtnp=NULL; 337 int count=1048576, rtncnt, repeat=1, nextp=0; 338 339 cnt=0; 340 while ( repeat && (rtncnt=getprocs(rtnp,PROCSIZE,0,0,&nextp, count))>0) 341 { 342 if (!rtnp) 343 { 344 count=rtncnt; 345 proctable=(struct procsinfo ) malloc((size_t) \ 346 PROCSIZEcount); 347 if (!proctable) 348 return NULL; 349 rtnp=proctable; 350 nextp=0; 351 } else 352 h.sterling 1.1 { 353 cnt+=rtncnt; 354 if (rtncnt>=count) 355 { 356 proctable=(struct procsinfo ) realloc(\ 357 (void)proctable, (size_t)\ 358 (PROCSIZE(cnt+count))); 359 if (!proctable) 360 return NULL; 361 rtnp=proctable+(cnt); 362 } else 363 repeat=0; 364 } // end of if(!rtnp) 365 } //end of while 366 return proctable; 367 } 368 369 ///////////////////////////////////////////////////////////////////////////// 370 // NAME : aixcimsrvrunning 371 // FUNCTION : it figures out if the cimserver process is running 372 // by checking the process table entries in the array 373 h.sterling 1.1 // returned from processdata(). If the cimserver process is 374 // running and its pid is the same as the pid in the file 375 // getPIDFileName(), it will return 0, otherwise it will 376 // return -1. 377 ///////////////////////////////////////////////////////////////////////////// 378 // ARGUMENTS: 379 // pid: the process identifier saved in the file 380 // getPIDFileName() 381 // RETURN VALUES: 382 // 0: successful 383 // -1: errors 384 // 385 ///////////////////////////////////////////////////////////////////////////// 386
387 h.sterling 1.2 int aixcimsrvrunning(pid_t pid, const char* processName)
388 h.sterling 1.1 { 389 int i,count; 390 struct procsinfo *proctable; 391 392 proctable=processdata(&count); 393 if (proctable==NULL) 394 return -1; 395 for (i=0;i<count;i++)
396 h.sterling 1.2 if (!strcmp(proctable[i].pi_comm, processName) && \
397 h.sterling 1.1 proctable[i].pi_pid==pid) 398 { 399 free(proctable); 400 return 0; 401 } 402 403 free(proctable); 404 return -1; 405 } 406 #endif 407 408 Boolean ServerProcess::isCIMServerRunning(void) 409 { 410 FILE *pid_file; 411 pid_t pid = 0; 412 413 // open the file containing the CIMServer process ID 414 pid_file = fopen(getPIDFileName(), "r"); 415 if (!pid_file) 416 { 417 return false; 418 h.sterling 1.1 } 419 420 // get the pid from the file 421 fscanf(pid_file, "%d\n", &pid); 422 423 fclose(pid_file); 424 425 if (pid == 0) 426 { 427 return false; 428 } 429 430 // 431 // check to see if cimserver process is alive 432 // 433 #if defined(PEGASUS_OS_HPUX) 434 struct pst_status pstru; 435 436 int ret_code; 437 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 438
439 mateus.baur 1.11.18.1 if (ret_code != -1)
440 h.sterling 1.1 { 441 //
442 mateus.baur 1.11.18.1 // Gets the command basename disregarding the command parameters
443 h.sterling 1.1 //
444 mateus.baur 1.11.18.1 char execName = strchr(pstru.pst_cmd,' '); 445 if (execName) 446 { 447 execName = '\0'; 448 } 449 execName = basename(pstru.pst_cmd); 450 451 if (strcmp(execName, getProcessName()) == 0)
452 h.sterling 1.1 {
453 mateus.baur 1.11.18.1 // 454 // Check to see if this command process has the same pid as the 455 // cimserver daemon process pid stored in the cimserver_start.conf 456 // file. Since the command has the same name as the cimserver daemon 457 // process, this could happen after a system reboot. If the pids are 458 // the same, cimserver isn't really running. 459 // 460 Uint32 mypid = System::getPID(); 461 if ((mypid != pid) && (parentPid != pid)) 462 { 463 // cimserver is running 464 return true; 465 }
466 h.sterling 1.1 } 467 } 468 #endif
469 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
470 h.sterling 1.1 if (get_proc(pid) != -1 ) 471 { 472 // cimserver is running 473 return true; 474 } 475 #endif 476 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 477 return isProcRunning(pid); 478 #endif 479 #if defined(PEGASUS_OS_AIX)
480 h.sterling 1.2 if (aixcimsrvrunning(pid, getProcessName())!=-1)
481 h.sterling 1.1 return true; 482 #endif 483 return false; 484 } 485 486 int ServerProcess::cimserver_kill(int id) 487 { 488 FILE *pid_file; 489 pid_t pid = 0; 490 491 // open the file containing the CIMServer process ID 492 pid_file = fopen(getPIDFileName(), "r"); 493 if (!pid_file) 494 { 495 return (-1); 496 } 497 498 // get the pid from the file 499 fscanf(pid_file, "%d\n", &pid); 500 501 fclose(pid_file); 502 h.sterling 1.1 503 if (pid == 0) 504 { 505 System::removeFile(getPIDFileName()); 506 return (-1); 507 } 508 509 // 510 // kill the process if it is still alive 511 // 512 #if defined(PEGASUS_OS_HPUX) 513 struct pst_status pstru; 514 515 int ret_code; 516 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 517 518 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 519 { 520 // cimserver is running, kill the process 521 kill(pid, SIGKILL); 522 } 523 h.sterling 1.1 #endif
524 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
525 h.sterling 1.1 if (get_proc(pid) != -1 ) 526 { 527 kill(pid, SIGKILL); 528 } 529 #endif 530 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 531 if (isProcRunning(pid)) { 532 kill(pid, SIGKILL); 533 } 534 #endif 535 #if defined(PEGASUS_OS_AIX)
536 h.sterling 1.2 if (!aixcimsrvrunning(pid, getProcessName()))
537 h.sterling 1.1 kill(pid,SIGKILL); 538 #endif 539 // remove the file 540 System::removeFile(getPIDFileName()); 541 542 return(0); 543 } 544 545 // notify parent process to terminate so user knows that cimserver 546 // is ready to serve CIM requests. 547 void ServerProcess::notify_parent(int id) 548 { 549 pid_t ppid = getppid(); 550 if (id) 551 kill(ppid, SIGTERM); 552 else 553 kill(ppid, PEGASUS_SIGUSR1); 554 } 555 556 557 // Platform specific run
558 kumpf 1.7 int ServerProcess::platform_run( 559 int argc, 560 char** argv, 561 Boolean shutdownOption, 562 Boolean debugOutputOption)
563 h.sterling 1.1 {
564 kumpf 1.7 return cimserver_run(argc, argv, shutdownOption, debugOutputOption);
565 h.sterling 1.1 }

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