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 59 PEGASUS_USING_PEGASUS; 60 PEGASUS_USING_STD; 61 62 Boolean handleSigUsr1 = false; 63 Boolean graveError = false; 64
65 r.kieninger 1.9 // the current pid is the server pid. After fork it is overwritten. 66 pid_t server_pid = getpid();
67 h.sterling 1.3 Uint32 parentPid = 0;
68 h.sterling 1.1 69 void sigUsr1Handler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 70 { 71 handleSigUsr1 = true; 72 } 73 74 void sigTermHandler(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig) 75 { 76 graveError= handleSigUsr1=true; 77 } 78 79 80 //constructor 81 ServerProcess::ServerProcess() {} 82 83 //destructor 84 ServerProcess::~ServerProcess() {} 85 86 // no-ops 87 void ServerProcess::cimserver_set_process(void* p) {} 88 void ServerProcess::cimserver_exitRC(int rc) {} 89 h.sterling 1.1 int ServerProcess::cimserver_initialize(void) { return 1; }
90 marek 1.10 91 // for all OSes supporting signals provide a cimserver_wait function 92 // that waits to be awakened by signal PEGASUS_SIGTERM or PEGASUS_SIGHUP 93 #ifdef PEGASUS_HAS_SIGNALS 94 int ServerProcess::cimserver_wait(void) 95 { 96 int sig = -1; 97 sigset_t set; 98 sigemptyset(&set); 99 sigaddset(&set, PEGASUS_SIGTERM); 100 sigaddset(&set, PEGASUS_SIGHUP); 101 errno = 0; 102 do 103 { 104 #if defined(PEGASUS_OS_ZOS) \|\| defined(PEGASUS_OS_SOLARIS) 105 sig = sigwait(&set); 106 #else // else for platforms = LINUX, HPUX, AIX 107 sigwait(&set, &sig); 108 #endif 109 } while (errno == EINTR); 110 return sig; 111 marek 1.10 } 112 #else
113 h.sterling 1.1 int ServerProcess::cimserver_wait(void) { return 1; }
114 marek 1.10 #endif 115
116 h.sterling 1.1 String ServerProcess::getHome(void) { return String::EMPTY; } 117 118 // daemon_init , RW Stevens, "Advance UNIX Programming" 119 120 int ServerProcess::cimserver_fork(void) 121 { 122 getSigHandle()->registerHandler(PEGASUS_SIGUSR1, sigUsr1Handler); 123 getSigHandle()->activate(PEGASUS_SIGUSR1); 124 getSigHandle()->registerHandler(SIGTERM, sigTermHandler); 125 getSigHandle()->activate(SIGTERM); 126 127 pid_t pid; 128 if( (pid = fork() ) < 0) 129 { 130 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 131 getSigHandle()->deactivate(SIGTERM); 132 return(-1); 133 } 134 else if (pid != 0) 135 { 136 // 137 h.sterling 1.1 // parent wait for child 138 // if there is a problem with signal, parent process terminates 139 // when waitTime expires 140 // 141 Uint32 waitTime = MAX_WAIT_TIME; 142 143 while(!handleSigUsr1 && waitTime > 0) 144 { 145 sleep(1); 146 waitTime--; 147 }
148 w.otsuka 1.4 if( !handleSigUsr1 ) 149 { 150 MessageLoaderParms parms("src.Service.ServerProcessUnix.CIMSERVER_START_TIMEOUT", 151 "The cimserver command timed out waiting for the CIM server to start."); 152 PEGASUS_STD(cerr) << MessageLoader::getMessage(parms) << PEGASUS_STD(endl); 153 }
154 h.sterling 1.1 exit(graveError); 155 } 156 157 setsid();
158 marek 1.10 umask(S_IRWXG \| S_IRWXO ); 159 160 // spawned daemon process doesn't need the old signal handlers of its parent 161 getSigHandle()->deactivate(PEGASUS_SIGUSR1); 162 getSigHandle()->deactivate(SIGTERM);
163 h.sterling 1.1 164 // get the pid of the cimserver process 165 server_pid = getpid(); 166 return(0); 167 } 168 169 long ServerProcess::get_server_pid() 170 { 171 return server_pid; 172 } 173
174 h.sterling 1.3 void ServerProcess::set_parent_pid(int pid) 175 { 176 parentPid = pid; 177 } 178 179
180 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
181 h.sterling 1.1 182 //=========================================================================== 183 // NAME : verify_process_name 184 // DESCRIPTION : Opens the 'stat' file in the /proc/<pid> directory to 185 // verify that the process name is that of the cimserver. 186 //=========================================================================== 187 int verify_process_name(char directory, const char server_process_name) 188 { 189 static char filename[80]; 190 static char buffer[512]; 191 int fd, bytesRead; 192 193 // generate the name of the stat file in the process's /proc directory, 194 // and open it 195 sprintf(filename, "%s/%s", directory, "stat"); 196 if ( (fd = open(filename, O_RDONLY, 0)) == -1 ) 197 { 198 return -1; 199 } 200 201 // read the contents 202 h.sterling 1.1 if ( (bytesRead = read( fd, buffer, (sizeof buffer) - 1 )) <= 0 ) 203 { 204 close(fd); 205 return -1; 206 } 207 208 // null terminate the file contents 209 buffer[bytesRead] = 0; 210 211 close(fd); 212 213 // the process name is the second element of the file contents and 214 // is surrounded by parentheses. 215 // 216 // find the positions of the parentheses in the file contents 217 char * open_paren; 218 char * close_paren; 219 220 open_paren = strchr (buffer, '('); 221 close_paren = strchr (buffer, ')'); 222 if (open_paren == NULL \|\| close_paren == NULL \|\| close_paren < open_paren) 223 h.sterling 1.1 { 224 return -1; 225 } 226 227 // allocate memory for the result
228 kumpf 1.6 AutoArrayPtr<char> process_name(new char[close_paren - open_paren]);
229 h.sterling 1.1 230 // copy the process name into the result
231 kumpf 1.6 strncpy (process_name.get(), open_paren + 1, close_paren - open_paren -1);
232 h.sterling 1.1 233 // strncpy doesn't NULL-terminate the result, so do it here
234 kumpf 1.6 process_name.get()[close_paren - open_paren -1] = '\0';
235 h.sterling 1.1
236 kumpf 1.6 if (strcmp(process_name.get(), server_process_name) != 0)
237 h.sterling 1.1 { 238 return -1; 239 } 240 241 return 0; 242 } 243 244 //============================================================================= 245 // NAME : get_proc 246 // DESCRIPTION : get_proc() makes a stat() system call on the directory in 247 // /proc with a name that matches the pid of the cimserver. 248 // It returns 0 if it successfully located the process dir 249 // and verified that the process name matches that of the 250 // cimserver. It returns -1 if it fails to open /proc, or 251 // the cimserver process does not exist. 252 //============================================================================= 253 int ServerProcess::get_proc(int pid) 254 { 255 static char path[32]; 256 static struct stat stat_buff; 257 258 h.sterling 1.1 sprintf(path, "/proc/%d", pid); 259 if (stat(path, &stat_buff) == -1) // process stopped running 260 { 261 return -1; 262 } 263 264 // get the process name to make sure it is the cimserver process 265 // ATTN: skip verify for Solaris
266 jim.wunderlich 1.5 #if !defined(PEGASUS_OS_SOLARIS)
267 h.sterling 1.1 if ((verify_process_name(path, getProcessName())) == -1) 268 { 269 return -1; 270 } 271 #endif 272 273 // 274 // Check to see if this command process has the same pid as the cimserver 275 // daemon process pid stored in the cimserver_start.conf file. Since the 276 // command has the same name as the cimserver daemon process, this could 277 // happen after a system reboot. If the pids are the same, cimserver 278 // isn't really running. 279 // 280 Uint32 mypid = System::getPID(); 281 if ((mypid == (unsigned)pid) \|\| ((unsigned)parentPid == (unsigned)pid)) 282 { 283 return -1; 284 } 285 return 0; 286 } 287 #endif 288 h.sterling 1.1 289 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 290 Boolean isProcRunning(pid_t pid) 291 { 292 W_PSPROC buf; 293 int token = 0; 294 memset(&buf, 0x00, sizeof(buf)); 295 buf.ps_conttyptr =(char ) malloc(buf.ps_conttylen =PS_CONTTYBLEN); 296 buf.ps_pathptr =(char ) malloc(buf.ps_pathlen =PS_PATHBLEN); 297 buf.ps_cmdptr =(char ) malloc(buf.ps_cmdlen =PS_CMDBLEN); 298 299 token = w_getpsent(token, &buf, sizeof(buf)); 300 do { 301 token = w_getpsent(token, &buf, sizeof(buf)); 302 if (buf.ps_pid==pid) { 303 free(buf.ps_conttyptr); 304 free(buf.ps_pathptr); 305 free(buf.ps_cmdptr); 306 return true; 307 } 308 } while(token>0); 309 h.sterling 1.1 310 free(buf.ps_conttyptr); 311 free(buf.ps_pathptr); 312 free(buf.ps_cmdptr); 313 return false; 314 } 315 #endif 316 317 #if defined(PEGASUS_OS_AIX) 318 319 ///////////////////////////////////////////////////////////////////////////// 320 // NAME : processdata 321 // FUNCTION : it calls subroutine getprocs() to get information 322 // about all processes. 323 ///////////////////////////////////////////////////////////////////////////// 324 // ARGUMENTS: 325 // cnt: the number of the processes in the returned table 326 // RETURN VALUES: 327 // when it successfully gets the process table entries, 328 // an array of procsinfo structures filled with process table 329 // entries are returned. Otherewise, a null pointer is 330 h.sterling 1.1 // returned. 331 // 332 ///////////////////////////////////////////////////////////////////////////// 333 struct procsinfo processdata(int cnt) 334 { 335 struct procsinfo proctable=NULL, rtnp=NULL; 336 int count=1048576, rtncnt, repeat=1, nextp=0; 337 338 cnt=0; 339 while ( repeat && (rtncnt=getprocs(rtnp,PROCSIZE,0,0,&nextp, count))>0) 340 { 341 if (!rtnp) 342 { 343 count=rtncnt; 344 proctable=(struct procsinfo ) malloc((size_t) \ 345 PROCSIZEcount); 346 if (!proctable) 347 return NULL; 348 rtnp=proctable; 349 nextp=0; 350 } else 351 h.sterling 1.1 { 352 cnt+=rtncnt; 353 if (rtncnt>=count) 354 { 355 proctable=(struct procsinfo ) realloc(\ 356 (void)proctable, (size_t)\ 357 (PROCSIZE(cnt+count))); 358 if (!proctable) 359 return NULL; 360 rtnp=proctable+(cnt); 361 } else 362 repeat=0; 363 } // end of if(!rtnp) 364 } //end of while 365 return proctable; 366 } 367 368 ///////////////////////////////////////////////////////////////////////////// 369 // NAME : aixcimsrvrunning 370 // FUNCTION : it figures out if the cimserver process is running 371 // by checking the process table entries in the array 372 h.sterling 1.1 // returned from processdata(). If the cimserver process is 373 // running and its pid is the same as the pid in the file 374 // getPIDFileName(), it will return 0, otherwise it will 375 // return -1. 376 ///////////////////////////////////////////////////////////////////////////// 377 // ARGUMENTS: 378 // pid: the process identifier saved in the file 379 // getPIDFileName() 380 // RETURN VALUES: 381 // 0: successful 382 // -1: errors 383 // 384 ///////////////////////////////////////////////////////////////////////////// 385
386 h.sterling 1.2 int aixcimsrvrunning(pid_t pid, const char* processName)
387 h.sterling 1.1 { 388 int i,count; 389 struct procsinfo *proctable; 390 391 proctable=processdata(&count); 392 if (proctable==NULL) 393 return -1; 394 for (i=0;i<count;i++)
395 h.sterling 1.2 if (!strcmp(proctable[i].pi_comm, processName) && \
396 h.sterling 1.1 proctable[i].pi_pid==pid) 397 { 398 free(proctable); 399 return 0; 400 } 401 402 free(proctable); 403 return -1; 404 } 405 #endif 406 407 Boolean ServerProcess::isCIMServerRunning(void) 408 { 409 FILE *pid_file; 410 pid_t pid = 0; 411 412 // open the file containing the CIMServer process ID 413 pid_file = fopen(getPIDFileName(), "r"); 414 if (!pid_file) 415 { 416 return false; 417 h.sterling 1.1 } 418 419 // get the pid from the file 420 fscanf(pid_file, "%d\n", &pid); 421 422 fclose(pid_file); 423 424 if (pid == 0) 425 { 426 return false; 427 } 428 429 // 430 // check to see if cimserver process is alive 431 // 432 #if defined(PEGASUS_OS_HPUX) 433 struct pst_status pstru; 434 435 int ret_code; 436 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 437 438 h.sterling 1.1 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 439 { 440 // 441 // Check to see if this command process has the same pid as the 442 // cimserver daemon process pid stored in the cimserver_start.conf 443 // file. Since the command has the same name as the cimserver daemon 444 // process, this could happen after a system reboot. If the pids are 445 // the same, cimserver isn't really running. 446 // 447 Uint32 mypid = System::getPID(); 448 if ((mypid != pid) && (parentPid != pid)) 449 { 450 // cimserver is running 451 return true; 452 } 453 } 454 #endif
455 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
456 h.sterling 1.1 if (get_proc(pid) != -1 ) 457 { 458 // cimserver is running 459 return true; 460 } 461 #endif 462 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 463 return isProcRunning(pid); 464 #endif 465 #if defined(PEGASUS_OS_AIX)
466 h.sterling 1.2 if (aixcimsrvrunning(pid, getProcessName())!=-1)
467 h.sterling 1.1 return true; 468 #endif 469 return false; 470 } 471 472 int ServerProcess::cimserver_kill(int id) 473 { 474 FILE *pid_file; 475 pid_t pid = 0; 476 477 // open the file containing the CIMServer process ID 478 pid_file = fopen(getPIDFileName(), "r"); 479 if (!pid_file) 480 { 481 return (-1); 482 } 483 484 // get the pid from the file 485 fscanf(pid_file, "%d\n", &pid); 486 487 fclose(pid_file); 488 h.sterling 1.1 489 if (pid == 0) 490 { 491 System::removeFile(getPIDFileName()); 492 return (-1); 493 } 494 495 // 496 // kill the process if it is still alive 497 // 498 #if defined(PEGASUS_OS_HPUX) 499 struct pst_status pstru; 500 501 int ret_code; 502 ret_code = pstat_getproc(&pstru, sizeof(struct pst_status), (size_t)0, pid); 503 504 if ( (ret_code != -1 ) && (strcmp(pstru.pst_ucomm, getProcessName())) == 0) 505 { 506 // cimserver is running, kill the process 507 kill(pid, SIGKILL); 508 } 509 h.sterling 1.1 #endif
510 jim.wunderlich 1.5 #if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) \|\| defined(PEGASUS_OS_SOLARIS)
511 h.sterling 1.1 if (get_proc(pid) != -1 ) 512 { 513 kill(pid, SIGKILL); 514 } 515 #endif 516 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) 517 if (isProcRunning(pid)) { 518 kill(pid, SIGKILL); 519 } 520 #endif 521 #if defined(PEGASUS_OS_AIX)
522 h.sterling 1.2 if (!aixcimsrvrunning(pid, getProcessName()))
523 h.sterling 1.1 kill(pid,SIGKILL); 524 #endif 525 // remove the file 526 System::removeFile(getPIDFileName()); 527 528 return(0); 529 } 530 531 // notify parent process to terminate so user knows that cimserver 532 // is ready to serve CIM requests. 533 void ServerProcess::notify_parent(int id) 534 { 535 pid_t ppid = getppid(); 536 if (id) 537 kill(ppid, SIGTERM); 538 else 539 kill(ppid, PEGASUS_SIGUSR1); 540 } 541 542 543 // Platform specific run
544 kumpf 1.7 int ServerProcess::platform_run( 545 int argc, 546 char** argv, 547 Boolean shutdownOption, 548 Boolean debugOutputOption)
549 h.sterling 1.1 {
550 kumpf 1.7 return cimserver_run(argc, argv, shutdownOption, debugOutputOption);
551 h.sterling 1.1 }

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