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 #endif 43 #include <fcntl.h> 44 #include <unistd.h> 45 #include <Pegasus/Common/Signal.h>
46 mike 1.11 #include <Pegasus/Common/AutoPtr.h>
47 h.sterling 1.1 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 48 #include <sys/ps.h> 49 #endif
50 w.otsuka 1.4 #define MAX_WAIT_TIME 240
51 h.sterling 1.1 #if defined(PEGASUS_OS_AIX) 52 extern "C" { 53 #include <procinfo.h> 54 extern int getprocs(struct procsinfo , int, struct fdsinfo , int,pid_t *,int); 55 #define PROCSIZE sizeof(struct procsinfo) 56 } 57 #endif
58 mike 1.11.16.4 #include <Pegasus/ExecutorClient/ExecutorClient.h>
59 mike 1.11.16.1
60 h.sterling 1.1 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 mike 1.11.16.1 {
123 h.sterling 1.1 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 // 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 h.sterling 1.1 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 mike 1.11.16.1
158 h.sterling 1.1 159 setsid();
160 marek 1.10 umask(S_IRWXG \| S_IRWXO ); 161 162 // spawned daemon process doesn't need the old signal handlers of its parent 163 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 164 getSigHandle()->deactivate(SIGTERM);
165 h.sterling 1.1 166 // get the pid of the cimserver process 167 server_pid = getpid();
168 mike 1.11.16.1 169 // Ask the executor process to daemonize. 170 ExecutorClient::daemonizeExecutor(); 171
172 h.sterling 1.1 return(0); 173 } 174 175 long ServerProcess::get_server_pid() 176 { 177 return server_pid; 178 } 179
180 h.sterling 1.3 void ServerProcess::set_parent_pid(int pid) 181 { 182 parentPid = pid; 183 } 184 185
186 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
187 h.sterling 1.1 188 //=========================================================================== 189 // NAME : verify_process_name 190 // DESCRIPTION : Opens the 'stat' file in the /proc/<pid> directory to 191 // verify that the process name is that of the cimserver. 192 //=========================================================================== 193 int verify_process_name(char directory, const char server_process_name) 194 { 195 static char filename[80]; 196 static char buffer[512]; 197 int fd, bytesRead; 198 199 // generate the name of the stat file in the process's /proc directory, 200 // and open it 201 sprintf(filename, "%s/%s", directory, "stat"); 202 if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) 203 { 204 return -1; 205 } 206 207 // read the contents 208 h.sterling 1.1 if ( (bytesRead = read( fd, buffer, (sizeof buffer) - 1 )) <= 0 ) 209 { 210 close(fd); 211 return -1; 212 } 213 214 // null terminate the file contents 215 buffer[bytesRead] = 0; 216 217 close(fd); 218 219 // the process name is the second element of the file contents and 220 // is surrounded by parentheses. 221 // 222 // find the positions of the parentheses in the file contents 223 char * open_paren; 224 char * close_paren; 225 226 open_paren = strchr (buffer, '('); 227 close_paren = strchr (buffer, ')'); 228 if (open_paren == NULL \|\| close_paren == NULL \|\| close_paren < open_paren) 229 h.sterling 1.1 { 230 return -1; 231 } 232 233 // allocate memory for the result
234 kumpf 1.6 AutoArrayPtr<char> process_name(new char[close_paren - open_paren]);
235 h.sterling 1.1 236 // copy the process name into the result
237 kumpf 1.6 strncpy (process_name.get(), open_paren + 1, close_paren - open_paren -1);
238 h.sterling 1.1 239 // strncpy doesn't NULL-terminate the result, so do it here
240 kumpf 1.6 process_name.get()[close_paren - open_paren -1] = '\0';
241 h.sterling 1.1
242 kumpf 1.6 if (strcmp(process_name.get(), server_process_name) != 0)
243 h.sterling 1.1 { 244 return -1; 245 } 246 247 return 0; 248 } 249 250 //============================================================================= 251 // NAME : get_proc 252 // DESCRIPTION : get_proc() makes a stat() system call on the directory in 253 // /proc with a name that matches the pid of the cimserver. 254 // It returns 0 if it successfully located the process dir 255 // and verified that the process name matches that of the 256 // cimserver. It returns -1 if it fails to open /proc, or 257 // the cimserver process does not exist. 258 //============================================================================= 259 int ServerProcess::get_proc(int pid) 260 { 261 static char path[32]; 262 static struct stat stat_buff; 263 264 h.sterling 1.1 sprintf(path, "/proc/%d", pid); 265 if (stat(path, &stat_buff) == -1) // process stopped running 266 { 267 return -1; 268 } 269 270 // get the process name to make sure it is the cimserver process 271 // ATTN: skip verify for Solaris
272 jim.wunderlich 1.5 #if !defined(PEGASUS_OS_SOLARIS)
273 h.sterling 1.1 if ((verify_process_name(path, getProcessName())) == -1) 274 { 275 return -1; 276 } 277 #endif 278 279 // 280 // Check to see if this command process has the same pid as the cimserver 281 // daemon process pid stored in the cimserver_start.conf file. Since the 282 // command has the same name as the cimserver daemon process, this could 283 // happen after a system reboot. If the pids are the same, cimserver 284 // isn't really running. 285 // 286 Uint32 mypid = System::getPID(); 287 if ((mypid == (unsigned)pid) \|\| ((unsigned)parentPid == (unsigned)pid)) 288 { 289 return -1; 290 } 291 return 0; 292 } 293 #endif 294 h.sterling 1.1 295 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 296 Boolean isProcRunning(pid_t pid) 297 { 298 W_PSPROC buf; 299 int token = 0; 300 memset(&buf, 0x00, sizeof(buf)); 301 buf.ps_conttyptr =(char ) malloc(buf.ps_conttylen =PS_CONTTYBLEN); 302 buf.ps_pathptr =(char ) malloc(buf.ps_pathlen =PS_PATHBLEN); 303 buf.ps_cmdptr =(char ) malloc(buf.ps_cmdlen =PS_CMDBLEN); 304 305 token = w_getpsent(token, &buf, sizeof(buf)); 306 do { 307 token = w_getpsent(token, &buf, sizeof(buf)); 308 if (buf.ps_pid==pid) { 309 free(buf.ps_conttyptr); 310 free(buf.ps_pathptr); 311 free(buf.ps_cmdptr); 312 return true; 313 } 314 } while(token>0); 315 h.sterling 1.1 316 free(buf.ps_conttyptr); 317 free(buf.ps_pathptr); 318 free(buf.ps_cmdptr); 319 return false; 320 } 321 #endif 322 323 #if defined(PEGASUS_OS_AIX) 324 325 ///////////////////////////////////////////////////////////////////////////// 326 // NAME : processdata 327 // FUNCTION : it calls subroutine getprocs() to get information 328 // about all processes. 329 ///////////////////////////////////////////////////////////////////////////// 330 // ARGUMENTS: 331 // cnt: the number of the processes in the returned table 332 // RETURN VALUES: 333 // when it successfully gets the process table entries, 334 // an array of procsinfo structures filled with process table 335 // entries are returned. Otherewise, a null pointer is 336 h.sterling 1.1 // returned. 337 // 338 ///////////////////////////////////////////////////////////////////////////// 339 struct procsinfo processdata(int cnt) 340 { 341 struct procsinfo proctable=NULL, rtnp=NULL; 342 int count=1048576, rtncnt, repeat=1, nextp=0; 343 344 cnt=0; 345 while ( repeat && (rtncnt=getprocs(rtnp,PROCSIZE,0,0,&nextp, count))>0) 346 { 347 if (!rtnp) 348 { 349 count=rtncnt; 350 proctable=(struct procsinfo ) malloc((size_t) \ 351 PROCSIZEcount); 352 if (!proctable) 353 return NULL; 354 rtnp=proctable; 355 nextp=0; 356 } else 357 h.sterling 1.1 { 358 cnt+=rtncnt; 359 if (rtncnt>=count) 360 { 361 proctable=(struct procsinfo ) realloc(\ 362 (void)proctable, (size_t)\ 363 (PROCSIZE(cnt+count))); 364 if (!proctable) 365 return NULL; 366 rtnp=proctable+(cnt); 367 } else 368 repeat=0; 369 } // end of if(!rtnp) 370 } //end of while 371 return proctable; 372 } 373 374 ///////////////////////////////////////////////////////////////////////////// 375 // NAME : aixcimsrvrunning 376 // FUNCTION : it figures out if the cimserver process is running 377 // by checking the process table entries in the array 378 h.sterling 1.1 // returned from processdata(). If the cimserver process is 379 // running and its pid is the same as the pid in the file 380 // getPIDFileName(), it will return 0, otherwise it will 381 // return -1. 382 ///////////////////////////////////////////////////////////////////////////// 383 // ARGUMENTS: 384 // pid: the process identifier saved in the file 385 // getPIDFileName() 386 // RETURN VALUES: 387 // 0: successful 388 // -1: errors 389 // 390 ///////////////////////////////////////////////////////////////////////////// 391
392 h.sterling 1.2 int aixcimsrvrunning(pid_t pid, const char* processName)
393 h.sterling 1.1 { 394 int i,count; 395 struct procsinfo *proctable; 396 397 proctable=processdata(&count); 398 if (proctable==NULL) 399 return -1; 400 for (i=0;i<count;i++)
401 h.sterling 1.2 if (!strcmp(proctable[i].pi_comm, processName) && \
402 h.sterling 1.1 proctable[i].pi_pid==pid) 403 { 404 free(proctable); 405 return 0; 406 } 407 408 free(proctable); 409 return -1; 410 } 411 #endif 412 413 Boolean ServerProcess::isCIMServerRunning(void) 414 { 415 FILE *pid_file; 416 pid_t pid = 0; 417 418 // open the file containing the CIMServer process ID 419 pid_file = fopen(getPIDFileName(), "r"); 420 if (!pid_file) 421 { 422 return false; 423 h.sterling 1.1 } 424 425 // get the pid from the file 426 fscanf(pid_file, "%d\n", &pid); 427 428 fclose(pid_file); 429 430 if (pid == 0) 431 { 432 return false; 433 } 434 435 // 436 // check to see if cimserver process is alive 437 // 438 #if defined(PEGASUS_OS_HPUX) 439 struct pst_status pstru; 440 441 int ret_code; 442 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 443 444 h.sterling 1.1 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 445 { 446 // 447 // Check to see if this command process has the same pid as the 448 // cimserver daemon process pid stored in the cimserver_start.conf 449 // file. Since the command has the same name as the cimserver daemon 450 // process, this could happen after a system reboot. If the pids are 451 // the same, cimserver isn't really running. 452 // 453 Uint32 mypid = System::getPID(); 454 if ((mypid != pid) && (parentPid != pid)) 455 { 456 // cimserver is running 457 return true; 458 } 459 } 460 #endif
461 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
462 h.sterling 1.1 if (get_proc(pid) != -1 ) 463 { 464 // cimserver is running 465 return true; 466 } 467 #endif 468 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 469 return isProcRunning(pid); 470 #endif 471 #if defined(PEGASUS_OS_AIX)
472 h.sterling 1.2 if (aixcimsrvrunning(pid, getProcessName())!=-1)
473 h.sterling 1.1 return true; 474 #endif
475 mike 1.11.16.2
476 h.sterling 1.1 return false; 477 } 478 479 int ServerProcess::cimserver_kill(int id) 480 { 481 FILE *pid_file; 482 pid_t pid = 0; 483 484 // open the file containing the CIMServer process ID 485 pid_file = fopen(getPIDFileName(), "r"); 486 if (!pid_file) 487 { 488 return (-1); 489 } 490 491 // get the pid from the file 492 fscanf(pid_file, "%d\n", &pid); 493 494 fclose(pid_file); 495 496 if (pid == 0) 497 h.sterling 1.1 { 498 System::removeFile(getPIDFileName()); 499 return (-1); 500 } 501 502 // 503 // kill the process if it is still alive 504 // 505 #if defined(PEGASUS_OS_HPUX) 506 struct pst_status pstru; 507 508 int ret_code; 509 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 510 511 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 512 { 513 // cimserver is running, kill the process 514 kill(pid, SIGKILL); 515 } 516 #endif
517 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
518 h.sterling 1.1 if (get_proc(pid) != -1 ) 519 { 520 kill(pid, SIGKILL); 521 } 522 #endif 523 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 524 if (isProcRunning(pid)) { 525 kill(pid, SIGKILL); 526 } 527 #endif 528 #if defined(PEGASUS_OS_AIX)
529 h.sterling 1.2 if (!aixcimsrvrunning(pid, getProcessName()))
530 h.sterling 1.1 kill(pid,SIGKILL); 531 #endif 532 // remove the file 533 System::removeFile(getPIDFileName()); 534 535 return(0); 536 } 537 538 // notify parent process to terminate so user knows that cimserver 539 // is ready to serve CIM requests. 540 void ServerProcess::notify_parent(int id) 541 { 542 pid_t ppid = getppid(); 543 if (id) 544 kill(ppid, SIGTERM); 545 else 546 kill(ppid, PEGASUS_SIGUSR1); 547 } 548 549 550 // Platform specific run
551 kumpf 1.7 int ServerProcess::platform_run( 552 int argc, 553 char** argv, 554 Boolean shutdownOption, 555 Boolean debugOutputOption)
556 h.sterling 1.1 {
557 kumpf 1.7 return cimserver_run(argc, argv, shutdownOption, debugOutputOption);
558 h.sterling 1.1 }

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