├── AUTHORS ├── COPYING ├── plugstack.conf ├── slurm-spank-x11-plug.c ├── slurm-spank-x11.c └── slurm-spank-x11.spec /AUTHORS: -------------------------------------------------------------------------------- 1 | Matthieu HAUTREUX 2 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /plugstack.conf: -------------------------------------------------------------------------------- 1 | ################################################################################ 2 | # X11 SLURM spank plugin configuration file 3 | # 4 | # this plugin can be used to add X11 support in slurm jobs using ssh X11 5 | # tunneling capabilities 6 | # 7 | # The following configuration parameters are available (the character | 8 | # replaces the space in compound options) : 9 | # 10 | # ssh_cmd : can be used to modify the ssh binary to use. 11 | # default corresponds to ssh_cmd=ssh 12 | # ssh_args : can be used to modify the ssh arguments to use. 13 | # default corresponds to ssh_cmd= 14 | # helpertask_cmd: can be used to add a trailing argument to the helper task 15 | # responsible for setting up the ssh tunnel 16 | # default corresponds to helpertask_cmd= 17 | # an interesting value can be helpertask_cmd=2>/tmp/log to 18 | # capture the stderr of the helper task 19 | # 20 | # Users can ask for X11 support for both interactive (srun) and batch (sbatch) 21 | # jobs using parameter --x11=[batch|first|last|all] or the SLURM_SPANK_X11 22 | # environment variable set to the required value. 23 | # 24 | # In interactive mode (srun), values can be first to establish a tunnel with 25 | # the first allocated node, last for the last one and all for all nodes. 26 | # 27 | # In batch mode (sbatch), only "batch" mode can be used but batch script can 28 | # be used first|last|all values with srun. In batch mode, the first allocated 29 | # node will contact the submission node using ssh to establish the tunnel 30 | # from the submission node to itself. As a result, the user must kept its 31 | # initial connection to the submission host as long as it wants to be able to 32 | # forward its X11 display to batch execution node. 33 | # 34 | #------------------------------------------------------------------------------- 35 | #optional x11.so 36 | #------------------------------------------------------------------------------- 37 | -------------------------------------------------------------------------------- /slurm-spank-x11-plug.c: -------------------------------------------------------------------------------- 1 | /***************************************************************************\ 2 | * slurm-spank-x11.c - SLURM SPANK X11 plugin 3 | *************************************************************************** 4 | * Copyright CEA/DAM/DIF (2008) 5 | * 6 | * Written by Matthieu Hautreux 7 | * 8 | * This file is part of slurm-spank-x11, a SLURM SPANK Plugin aiming at 9 | * providing access to X11 display through tunneling on SLURM execution 10 | * nodes using OpenSSH. 11 | * 12 | * slurm-spank-x11 is free software; you can redistribute it and/or modify 13 | * it under the terms of the GNU General Public License as published by the 14 | * Free Software Foundation; either version 2 of the License, or (at your 15 | * option) any later version. 16 | * 17 | * slurm-spank-x11 is distributed in the hope that it will be useful, but 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 19 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 | * for more details. 21 | * 22 | * You should have received a copy of the GNU General Public License along 23 | * with slurm-spank-x11; if not, write to the Free Software Foundation, Inc., 24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 25 | * 26 | \***************************************************************************/ 27 | /* Note: To compile: gcc -fPIC -shared -o x11 slurm-spank-x11-plug.c */ 28 | #include 29 | #include 30 | #include 31 | 32 | #include 33 | #include 34 | #include 35 | #include 36 | 37 | #include 38 | 39 | #include 40 | #include 41 | 42 | #ifndef X11_LIBEXEC_PROG 43 | #define X11_LIBEXEC_PROG "/usr/libexec/slurm-spank-x11" 44 | #endif 45 | 46 | #define SPANK_X11_ENVVAR "SLURM_SPANK_X11" 47 | 48 | #define X11_MODE_NONE 0 49 | #define X11_MODE_FIRST 1 50 | #define X11_MODE_LAST 2 51 | #define X11_MODE_ALL 3 52 | #define X11_MODE_BATCH 4 53 | 54 | #define INFO slurm_debug 55 | #define DEBUG slurm_debug 56 | #define ERROR slurm_error 57 | 58 | static int x11_mode = X11_MODE_NONE ; 59 | 60 | static char* ssh_cmd = NULL; 61 | static char* ssh_args = NULL; 62 | static char* helpertask_args = NULL ; 63 | 64 | /* 65 | * can be used to adapt the ssh parameters to use to 66 | * set up the ssh tunnel 67 | * 68 | * this can be overriden by ssh_cmd= and ssh_args= 69 | * spank plugin conf args 70 | */ 71 | #define DEFAULT_SSH_CMD "ssh" 72 | #define DEFAULT_SSH_ARGS "" 73 | 74 | /* 75 | * can be used to add trailing options to the command executed to 76 | * set up the ssh tunnel 77 | * 78 | * this can be overriden by helpertask_args= spank plugin conf arg 79 | */ 80 | #define DEFAULT_HELPERTASK_ARGS "" 81 | 82 | /* 83 | * All spank plugins must define this macro for the SLURM plugin loader. 84 | */ 85 | SPANK_PLUGIN(x11, 1); 86 | 87 | /* 88 | * Implement a local version of popen that ensure that the command is 89 | * ran with real and saved set-user-id uid/git set to effective uid/gid 90 | */ 91 | static FILE *xpopen(const char *command, const char *mode) 92 | { 93 | int pid; 94 | int pep[2]; /* pipe endpoints */ 95 | int p_end, c_end; /* identify parent and child endpoints */ 96 | 97 | uid_t euid; 98 | gid_t egid; 99 | 100 | /* identify process to pipe endpoints based on requested mode (r|w) */ 101 | if ( *mode == 'r' ) { 102 | p_end = 0; 103 | c_end = 1 ; 104 | } else if ( *mode == 'w' ) { 105 | p_end = 1; 106 | c_end = 0 ; 107 | } else 108 | return NULL ; 109 | 110 | /* create the pipe */ 111 | if ( pipe(pep) < 0 ) 112 | return NULL; 113 | 114 | /* create a child task to run the command and get the 115 | * associated FILE* in the parent process */ 116 | switch( pid = fork() ) 117 | { 118 | 119 | case -1: 120 | ERROR("xopen: unable to fork child task"); 121 | return NULL; 122 | case 0: 123 | /* child process closes the parent endpoint 124 | * and redirect the pipe to either the stdin or 125 | * stdout fd (0|1) */ 126 | if (close(pep[p_end]) == -1) 127 | exit(1); 128 | if (dup2(pep[c_end],c_end) == -1) 129 | exit(1); 130 | if (close(pep[c_end]) == -1) 131 | exit(1); 132 | 133 | /* change real/saved_set-user-id uid and gid to match the effective one 134 | * without that the execl of /bin/sh would automatically revert to 135 | * an execution using the real uid/gid. That is a security issue that we 136 | * have to avoid. 137 | */ 138 | euid = geteuid(); 139 | egid = getegid(); 140 | if (setresgid(egid,-1,egid) || setresuid(euid,-1,euid)) 141 | exit(2); 142 | 143 | /* execute the provided command */ 144 | execl( "/bin/sh", "sh", "-c", command, NULL ); 145 | exit(1); 146 | 147 | default: 148 | /* parent process closes the child endpoint and return 149 | * the file descriptor to use in either r or w mode */ 150 | if ( close(pep[c_end]) == -1 ) 151 | return NULL; 152 | return fdopen(pep[p_end], mode); 153 | } 154 | } 155 | 156 | /* 157 | * Provide a --x11=first|last|all option to srun: 158 | */ 159 | static int _x11_opt_process (int val, const char *optarg, int remote); 160 | 161 | 162 | struct spank_option spank_opts[] = 163 | { 164 | { "x11", "[batch|first|last|all]", 165 | "Export x11 display on first|last|all allocated node(s)", 2, 0, 166 | (spank_opt_cb_f) _x11_opt_process 167 | }, 168 | SPANK_OPTIONS_TABLE_END 169 | }; 170 | 171 | 172 | /* 173 | * 174 | * SLURM SPANK API SLURM SPANK API SLURM SPANK API SLURM SPANK API 175 | * 176 | * SLURM SPANK API SLURM SPANK API SLURM SPANK API SLURM SPANK API 177 | * 178 | */ 179 | int 180 | slurm_spank_init (spank_t sp, int ac, char *av[]) 181 | { 182 | spank_option_register(sp,spank_opts); 183 | x11_mode = _spank_x11_get_mode(sp,ac,av); 184 | 185 | return 0; 186 | } 187 | 188 | /* 189 | * srun call, the client node connects the allocated node(s) 190 | */ 191 | int slurm_spank_local_user_init (spank_t sp, int ac, char **av) 192 | { 193 | int status; 194 | 195 | uint32_t jobid; 196 | uint32_t stepid; 197 | job_info_msg_t * job_buffer_ptr; 198 | job_info_t* job_ptr; 199 | 200 | /* only handle interactive usage */ 201 | if ( x11_mode == X11_MODE_NONE || 202 | x11_mode == X11_MODE_BATCH ) 203 | return 0; 204 | 205 | /* check DISPLAY value */ 206 | if ( getenv("DISPLAY") == NULL ) { 207 | ERROR("x11: no local DISPLAY defined, skipping"); 208 | return 0; 209 | } 210 | 211 | /* get job id */ 212 | if ( spank_get_item (sp, S_JOB_ID, &jobid) 213 | != ESPANK_SUCCESS ) { 214 | status = -1; 215 | goto exit; 216 | } 217 | 218 | /* get job step id */ 219 | if ( spank_get_item (sp, S_JOB_STEPID, &stepid) 220 | != ESPANK_SUCCESS ) { 221 | status = -1; 222 | goto exit; 223 | } 224 | 225 | /* get job infos */ 226 | status = slurm_load_job(&job_buffer_ptr,jobid,SHOW_ALL); 227 | if ( status != 0 ) { 228 | ERROR("x11: unable to get job infos"); 229 | status = -3; 230 | goto exit; 231 | } 232 | 233 | /* check infos validity */ 234 | if ( job_buffer_ptr->record_count != 1 ) { 235 | ERROR("x11: job infos are invalid"); 236 | status = -4; 237 | goto clean_exit; 238 | } 239 | job_ptr = job_buffer_ptr->job_array; 240 | 241 | /* check allocated nodes var */ 242 | if ( job_ptr->nodes == NULL ) { 243 | ERROR("x11: job has no allocated nodes defined"); 244 | status = -5; 245 | goto clean_exit; 246 | } 247 | 248 | /* connect required nodes */ 249 | status = _x11_connect_nodes(job_ptr->nodes,jobid,stepid); 250 | 251 | clean_exit: 252 | slurm_free_job_info_msg(job_buffer_ptr); 253 | 254 | exit: 255 | return status; 256 | } 257 | 258 | 259 | int _x11_init_remote_inter(spank_t sp,uint32_t jobid,uint32_t stepid) 260 | { 261 | FILE* f; 262 | int status = -1; 263 | char* cmd_pattern= X11_LIBEXEC_PROG " -i %u.%u -g"; 264 | char* cmd; 265 | size_t cmd_length; 266 | char display[256]; 267 | 268 | /* build slum-spank-x11 command to retrieve connected DISPLAY to use */ 269 | cmd_length = strlen(cmd_pattern) + 128 ; 270 | cmd = (char*) malloc(cmd_length*sizeof(char)); 271 | if ( cmd == NULL || 272 | snprintf(cmd,cmd_length,cmd_pattern,jobid,stepid) >= cmd_length ) { 273 | ERROR("x11: error while building cmd"); 274 | status = -2; 275 | } 276 | else { 277 | /* execute the command to retrieve the DISPLAY value to use */ 278 | f = popen(cmd,"r"); 279 | if ( f != NULL ) { 280 | if ( fscanf(f,"%255s\n",display) == 1 ) { 281 | if ( spank_setenv(sp,"DISPLAY",display,1) 282 | != ESPANK_SUCCESS ) { 283 | ERROR("x11: unable " 284 | "to set DISPLAY in env"); 285 | status = -5; 286 | } 287 | else { 288 | INFO("x11: now using DISPLAY=%s", 289 | display); 290 | status = 0; 291 | } 292 | } 293 | else { 294 | ERROR("x11: unable to read DISPLAY value"); 295 | status = -4; 296 | } 297 | pclose(f); 298 | } 299 | else { 300 | ERROR("x11: unable to exec get cmd '%s'",cmd); 301 | status = -3; 302 | } 303 | free(cmd); 304 | } 305 | 306 | return status; 307 | } 308 | 309 | int _x11_init_remote_batch(spank_t sp,uint32_t jobid,uint32_t stepid) 310 | { 311 | int status; 312 | 313 | FILE* f; 314 | char localhost[256]; 315 | char* cmd_pattern= X11_LIBEXEC_PROG " -u %s -s \"%s\" -o \"%s\" -f %s -d %s -t %s -i %u.%u -cwg %s &"; 316 | char* cmd; 317 | size_t cmd_length; 318 | char display[256]; 319 | 320 | struct passwd user_pwent; 321 | struct passwd *p_pwent; 322 | size_t pwent_buffer_length = sysconf(_SC_GETPW_R_SIZE_MAX); 323 | char pwent_buffer[pwent_buffer_length]; 324 | 325 | job_info_msg_t * job_buffer_ptr; 326 | job_info_t* job_ptr; 327 | 328 | /* 329 | * get current hostname 330 | */ 331 | if ( gethostname(localhost,256) != 0 ) { 332 | status = -20; 333 | goto exit; 334 | } 335 | 336 | /* 337 | * the batch script inherits the DISPLAY value of the 338 | * submission command. We will use it on the allocation node 339 | * for proper establishment of a working X11 ssh tunnel 340 | */ 341 | if ( spank_getenv(sp,"DISPLAY",display,256) != ESPANK_SUCCESS ) { 342 | ERROR("x11: unable to read batch step " 343 | "inherited DISPLAY value"); 344 | status = -1; 345 | goto exit; 346 | } 347 | 348 | /* get job infos */ 349 | status = slurm_load_job(&job_buffer_ptr,jobid,SHOW_ALL); 350 | if ( status != 0 ) { 351 | ERROR("x11: unable to get job infos"); 352 | status = -3; 353 | goto exit; 354 | } 355 | 356 | /* check infos validity */ 357 | if ( job_buffer_ptr->record_count != 1 ) { 358 | ERROR("x11: job infos are invalid"); 359 | status = -4; 360 | goto clean_exit; 361 | } 362 | job_ptr = job_buffer_ptr->job_array; 363 | 364 | /* get user name */ 365 | status = getpwuid_r(job_ptr->user_id,&user_pwent,pwent_buffer, 366 | pwent_buffer_length,&p_pwent) ; 367 | if (status) { 368 | error("x11: unable to get username for uid=%u : %s",job_ptr->user_id, 369 | strerror(status)) ; 370 | status = -10; 371 | goto clean_exit; 372 | } 373 | 374 | /* 375 | * build the command line that will be used to forward the 376 | * alloc node X11 tunnel 377 | */ 378 | cmd_length = strlen(cmd_pattern) + 128 ; 379 | cmd = (char*) malloc(cmd_length*sizeof(char)); 380 | if ( cmd == NULL || 381 | snprintf(cmd,cmd_length,cmd_pattern,user_pwent.pw_name, 382 | (ssh_cmd == NULL) ? DEFAULT_SSH_CMD : ssh_cmd, 383 | (ssh_args == NULL) ? DEFAULT_SSH_ARGS : ssh_args, 384 | job_ptr->alloc_node,display,localhost,jobid,stepid, 385 | (helpertask_args == NULL) ? DEFAULT_HELPERTASK_ARGS : helpertask_args) >= cmd_length ) { 386 | ERROR("x11: error while building cmd"); 387 | status = -2; 388 | } 389 | else { 390 | INFO("x11: batch mode : executing %s",cmd); 391 | /* execute the command to retrieve the DISPLAY value to use */ 392 | f = xpopen(cmd,"r"); 393 | if ( f != NULL ) { 394 | if ( fscanf(f,"%255s",display) == 1 ) { 395 | if ( spank_setenv(sp,"DISPLAY",display,1) 396 | != ESPANK_SUCCESS ) { 397 | ERROR("x11: unable to set DISPLAY" 398 | " in job env"); 399 | status = -5; 400 | } 401 | else { 402 | INFO("x11: now using DISPLAY=%s", 403 | display); 404 | status=0; 405 | } 406 | } 407 | else { 408 | ERROR("x11: unable to get a DISPLAY value"); 409 | status = -6; 410 | } 411 | pclose(f); 412 | } 413 | else { 414 | ERROR("x11: unable to exec get cmd '%s'",cmd); 415 | status = -3; 416 | } 417 | } 418 | 419 | if ( cmd != NULL ) 420 | free(cmd); 421 | 422 | clean_exit: 423 | slurm_free_job_info_msg(job_buffer_ptr); 424 | 425 | exit: 426 | return status; 427 | } 428 | 429 | /* 430 | * in remote mode, read DISPLAY file content and set its value in job's DISPLAY 431 | * environment variable 432 | */ 433 | int slurm_spank_user_init (spank_t sp, int ac, char **av) 434 | { 435 | int status=-1; 436 | int do_init=0; 437 | uint32_t jobid; 438 | uint32_t stepid; 439 | uint32_t nnodes; 440 | uint32_t nodeid; 441 | 442 | if ( x11_mode == X11_MODE_NONE ) 443 | return 0; 444 | 445 | /* get job id */ 446 | if ( spank_get_item (sp, S_JOB_ID, &jobid) != ESPANK_SUCCESS ) 447 | return status; 448 | 449 | /* get job step id */ 450 | if ( spank_get_item (sp, S_JOB_STEPID, &stepid) != ESPANK_SUCCESS ) 451 | return status; 452 | 453 | if ( stepid == SLURM_BATCH_SCRIPT && x11_mode == X11_MODE_BATCH ) { 454 | return _x11_init_remote_batch(sp,jobid,stepid); 455 | } 456 | else if ( x11_mode != X11_MODE_BATCH ) { 457 | 458 | /* get the number of nodes */ 459 | if ( spank_get_item (sp, S_JOB_NNODES, &nnodes) != ESPANK_SUCCESS ) 460 | return status; 461 | 462 | /* get the local node ID */ 463 | if ( spank_get_item (sp, S_JOB_NODEID, &nodeid) != ESPANK_SUCCESS ) 464 | return status; 465 | 466 | /* test if the local node has to go further */ 467 | switch ( x11_mode ) { 468 | case X11_MODE_FIRST : 469 | if ( nodeid == 0 ) { 470 | do_init = 1; 471 | } 472 | break; 473 | case X11_MODE_LAST : 474 | if ( nodeid == (nnodes - 1) ) { 475 | do_init = 1; 476 | } 477 | break; 478 | case X11_MODE_ALL : 479 | do_init = 1; 480 | break; 481 | default : 482 | break; 483 | } 484 | 485 | /* do the initialization of the X11 export if requested */ 486 | if ( do_init == 1 ) 487 | return _x11_init_remote_inter(sp,jobid,stepid); 488 | else 489 | return 0; 490 | } 491 | 492 | } 493 | 494 | /* 495 | * in remote mode, remove DISPLAY file in order to stop 496 | * ssh -X process initialized by the client 497 | */ 498 | int slurm_spank_exit (spank_t sp, int ac, char **av) 499 | { 500 | uint32_t jobid; 501 | uint32_t stepid; 502 | 503 | FILE* f; 504 | char* expc_pattern= X11_LIBEXEC_PROG " -i %u.%u -r 2>/dev/null"; 505 | char* expc_cmd; 506 | size_t expc_length; 507 | 508 | /* noting to do in local mode */ 509 | if (!spank_remote (sp)) 510 | return 0; 511 | 512 | /* get job id */ 513 | if ( spank_get_item (sp, S_JOB_ID, &jobid) != ESPANK_SUCCESS ) 514 | return -1; 515 | 516 | /* get job step id */ 517 | if ( spank_get_item (sp, S_JOB_STEPID, &stepid) != ESPANK_SUCCESS ) 518 | return -1; 519 | 520 | /* remove DISPLAY reference */ 521 | expc_length = strlen(expc_pattern) + 128 ; 522 | expc_cmd = (char*) malloc(expc_length*sizeof(char)); 523 | if ( expc_cmd != NULL && 524 | ( snprintf(expc_cmd,expc_length,expc_pattern,jobid,stepid) 525 | >= expc_length ) ) { 526 | ERROR("x11: error while creating remove reference cmd"); 527 | } 528 | else { 529 | f = xpopen(expc_cmd,"r"); 530 | if ( f == NULL ) { 531 | ERROR("x11: unable to exec remove" 532 | " cmd '%s'",expc_cmd); 533 | } 534 | else 535 | pclose(f); 536 | } 537 | if ( expc_cmd != NULL ) 538 | free(expc_cmd); 539 | 540 | return 0; 541 | } 542 | 543 | static int _x11_opt_process (int val, const char *optarg, int remote) 544 | { 545 | if (optarg == NULL) { 546 | x11_mode = X11_MODE_FIRST; 547 | return (0); 548 | } 549 | 550 | if ( strncmp(optarg,"first",6)==0 ) { 551 | x11_mode = X11_MODE_FIRST; 552 | } 553 | else if ( strncmp(optarg,"last",5)==0 ) { 554 | x11_mode = X11_MODE_LAST; 555 | } 556 | else if ( strncmp(optarg,"all",4)==0 ) { 557 | x11_mode = X11_MODE_ALL; 558 | } 559 | else if ( strncmp(optarg,"batch",5)==0 ) { 560 | x11_mode = X11_MODE_BATCH; 561 | } 562 | 563 | if ( x11_mode == X11_MODE_NONE ) { 564 | ERROR ("Bad value for --x11: %s", optarg); 565 | return (-1); 566 | } 567 | 568 | return (0); 569 | } 570 | 571 | int _connect_node (char* node,uint32_t jobid,uint32_t stepid) 572 | { 573 | int status = -1; 574 | 575 | FILE* f; 576 | char display[256]; 577 | char* expc_pattern= X11_LIBEXEC_PROG " -t %s -i %u.%u -cgw -s \"%s\" -o \"%s\" 2>/dev/null %s &"; 578 | char* expc_cmd; 579 | size_t expc_length; 580 | 581 | expc_length = strlen(expc_pattern) + strlen(node) + 128 + 582 | strlen((ssh_cmd == NULL) ? DEFAULT_SSH_CMD : ssh_cmd) + 583 | strlen((ssh_args == NULL) ? DEFAULT_SSH_ARGS : ssh_args) + 584 | strlen((helpertask_args == NULL) ? 585 | DEFAULT_HELPERTASK_ARGS : helpertask_args) ; 586 | expc_cmd = (char*) malloc(expc_length*sizeof(char)); 587 | if ( expc_cmd != NULL ) { 588 | snprintf(expc_cmd,expc_length,expc_pattern,node,jobid,stepid, 589 | (ssh_cmd == NULL) ? DEFAULT_SSH_CMD : ssh_cmd, 590 | (ssh_args == NULL) ? DEFAULT_SSH_ARGS : ssh_args, 591 | (helpertask_args == NULL) ? 592 | DEFAULT_HELPERTASK_ARGS : helpertask_args ); 593 | INFO("x11: interactive mode : executing %s",expc_cmd); 594 | f = popen(expc_cmd,"r"); 595 | if ( fscanf(f,"%255s",display) != 1 ) 596 | ERROR("x11: unable to connect node %s",node); 597 | else { 598 | INFO("x11: DISPLAY=%s on node %s",display,node); 599 | status = 0; 600 | } 601 | pclose(f); 602 | free(expc_cmd); 603 | } 604 | 605 | return status; 606 | } 607 | 608 | int _x11_connect_nodes (char* nodes,uint32_t jobid,uint32_t stepid) 609 | { 610 | char* host; 611 | hostlist_t hlist; 612 | int n=0; 613 | int i; 614 | 615 | /* count allocated nodes... */ 616 | hlist = slurm_hostlist_create(nodes); 617 | n=-1; 618 | do { 619 | n++; 620 | host = slurm_hostlist_shift(hlist); 621 | } 622 | while ( host != NULL ) ; 623 | slurm_hostlist_destroy(hlist); 624 | 625 | /* do the export stuff */ 626 | hlist = slurm_hostlist_create(nodes); 627 | for (i=0; i < n; i++ ) { 628 | host = slurm_hostlist_shift(hlist); 629 | switch ( x11_mode ) { 630 | 631 | case X11_MODE_FIRST : 632 | if ( i == 0 ) { 633 | _connect_node(host,jobid,stepid); 634 | } 635 | break; 636 | 637 | case X11_MODE_LAST : 638 | if ( i == (n - 1) ) { 639 | _connect_node(host,jobid,stepid); 640 | } 641 | break; 642 | 643 | case X11_MODE_ALL : 644 | _connect_node(host,jobid,stepid); 645 | break; 646 | 647 | default : 648 | break; 649 | } 650 | } 651 | slurm_hostlist_destroy(hlist); 652 | 653 | return 0; 654 | } 655 | 656 | 657 | int 658 | _spank_x11_get_mode(spank_t sp, int ac, char *av[]) 659 | { 660 | int i; 661 | char* elt; 662 | char* p; 663 | int fstatus; 664 | char spank_x11_env[6]; 665 | 666 | char* envval=NULL; 667 | 668 | /* get configuration line parameters, replacing '|' with ' ' */ 669 | for (i = 0; i < ac; i++) { 670 | elt = av[i]; 671 | if ( strncmp(elt,"ssh_cmd=",8) == 0 ) { 672 | ssh_cmd=strdup(elt+8); 673 | p = ssh_cmd; 674 | while ( p != NULL && *p != '\0' ) { 675 | if ( *p == '|' ) 676 | *p= ' '; 677 | p++; 678 | } 679 | } 680 | else if ( strncmp(elt,"ssh_args=",9) == 0 ) { 681 | ssh_args=strdup(elt+9); 682 | p = ssh_args; 683 | while ( p != NULL && *p != '\0' ) { 684 | if ( *p == '|' ) 685 | *p= ' '; 686 | p++; 687 | } 688 | } 689 | else if ( strncmp(elt,"helpertask_args=",16) == 0 ) { 690 | helpertask_args=strdup(elt+16); 691 | p = helpertask_args; 692 | while ( p != NULL && *p != '\0' ) { 693 | if ( *p == '|' ) 694 | *p= ' '; 695 | p++; 696 | } 697 | } 698 | } 699 | 700 | /* read env configuration variable */ 701 | if (spank_remote (sp)) { 702 | fstatus = spank_getenv(sp,SPANK_X11_ENVVAR, 703 | spank_x11_env,6); 704 | if ( fstatus == 0 ) { 705 | spank_x11_env[5]='\0'; 706 | envval=spank_x11_env; 707 | } 708 | } 709 | else { 710 | envval = getenv(SPANK_X11_ENVVAR); 711 | } 712 | /* if env variable is set, use it */ 713 | if ( envval != NULL ) { 714 | /* check env var value (can be yes|no|done)*/ 715 | if ( strncmp(envval,"first",5) == 0 ) { 716 | return X11_MODE_FIRST ; 717 | } 718 | else if ( strncmp(envval,"last",4) == 0 ) { 719 | return X11_MODE_LAST ; 720 | } 721 | else if ( strncmp(envval,"all",3) == 0 ) { 722 | return X11_MODE_ALL ; 723 | } 724 | else if ( strncmp(envval,"batch",5) == 0 ) { 725 | return X11_MODE_BATCH ; 726 | } 727 | else 728 | return X11_MODE_NONE ; 729 | } 730 | else { 731 | /* no env variable defined, return command line */ 732 | /* or configuration file auks flag */ 733 | return x11_mode ; 734 | } 735 | 736 | } 737 | -------------------------------------------------------------------------------- /slurm-spank-x11.c: -------------------------------------------------------------------------------- 1 | /***************************************************************************\ 2 | * slurm-spank-x11.c - SLURM SPANK X11 plugin helper task 3 | *************************************************************************** 4 | * Copyright CEA/DAM/DIF (2008) 5 | * 6 | * Written by Matthieu Hautreux 7 | * 8 | * This file is part of slurm-spank-x11, a SLURM SPANK Plugin aiming at 9 | * providing access to X11 display through tunneling on SLURM execution 10 | * nodes using OpenSSH. 11 | * 12 | * slurm-spank-x11 is free software; you can redistribute it and/or modify 13 | * it under the terms of the GNU General Public License as published by the 14 | * Free Software Foundation; either version 2 of the License, or (at your 15 | * option) any later version. 16 | * 17 | * slurm-spank-x11 is distributed in the hope that it will be useful, but 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 19 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 | * for more details. 21 | * 22 | * You should have received a copy of the GNU General Public License along 23 | * with slurm-spank-x11; if not, write to the Free Software Foundation, Inc., 24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 25 | * 26 | \***************************************************************************/ 27 | #include 28 | #include 29 | #include 30 | 31 | #include 32 | #include 33 | #include 34 | #include 35 | 36 | #include 37 | #include 38 | 39 | #ifndef X11_LIBEXEC_PROG 40 | #define X11_LIBEXEC_PROG "/usr/libexec/slurm-spank-x11" 41 | #endif 42 | 43 | #define REF_FILE_PATTERN "/tmp/slurm-spank-x11.%s" 44 | 45 | #define SPANK_X11_DEFAULT_SSH_CMD "ssh" 46 | #define SPANK_X11_DEFAULT_SSH_OPTS "" 47 | 48 | int write_display_ref(char* refid) 49 | { 50 | FILE* file; 51 | char* display; 52 | char ref_file[256]; 53 | 54 | /* build file reference */ 55 | if ( snprintf(ref_file,256,REF_FILE_PATTERN,refid) >= 256 ) { 56 | fprintf(stderr,"error: unable to build file reference\n"); 57 | return 20; 58 | } 59 | 60 | /* get DISPLAY reference */ 61 | display = getenv("DISPLAY"); 62 | if ( display == NULL ) { 63 | fprintf(stderr,"error: unable to get DISPLAY value\n"); 64 | return 10; 65 | } 66 | 67 | /* write it into reference file */ 68 | file = fopen(ref_file,"w"); 69 | if ( file == NULL ) { 70 | fprintf(stderr,"error: unable to create file %s\n", 71 | ref_file); 72 | return 30; 73 | } 74 | fprintf(file,"%s\n",display); 75 | fclose(file); 76 | 77 | return 0; 78 | } 79 | 80 | int read_display_ref(char* refid,char** display) 81 | { 82 | int rc; 83 | FILE* file; 84 | char rdisplay[256]; 85 | char ref_file[256]; 86 | 87 | /* build file reference */ 88 | if ( snprintf(ref_file,256,REF_FILE_PATTERN,refid) >= 256 ) { 89 | fprintf(stderr,"error: unable to build file reference\n"); 90 | return 20; 91 | } 92 | 93 | /* read reference file DISPLAY value */ 94 | file = fopen(ref_file,"r"); 95 | if ( file == NULL ) { 96 | fprintf(stderr,"error: unable to open file %s\n", 97 | ref_file); 98 | return 30; 99 | } 100 | if ( fscanf(file,"%256s\n",rdisplay) != 1 ) { 101 | fprintf(stderr,"warning: unable to read DISPLAY value " 102 | "from file %s\n",ref_file); 103 | rc = 31; 104 | } 105 | else { 106 | *display=strdup(rdisplay); 107 | fflush(stdout); 108 | rc = 0; 109 | } 110 | fclose(file); 111 | 112 | return rc; 113 | } 114 | 115 | int remove_display_ref(char* refid) 116 | { 117 | char ref_file[256]; 118 | 119 | /* build file reference */ 120 | if ( snprintf(ref_file,256,REF_FILE_PATTERN,refid) >= 256 ) { 121 | fprintf(stderr,"error: unable to build file reference\n"); 122 | return 20; 123 | } 124 | 125 | /* unlink reference file */ 126 | if ( unlink(ref_file) ) { 127 | fprintf(stderr,"error: unable to remove file %s\n", 128 | ref_file); 129 | return 31; 130 | } 131 | 132 | return 0; 133 | } 134 | 135 | int wait_display_ref(char* refid) 136 | { 137 | struct stat fstatbuf; 138 | char ref_file[256]; 139 | 140 | /* build file reference */ 141 | if ( snprintf(ref_file,256,REF_FILE_PATTERN,refid) >= 256 ) { 142 | fprintf(stderr,"error: unable to build file reference\n"); 143 | return 20; 144 | } 145 | 146 | /* loop on file existence or parent process not init */ 147 | while ( stat(ref_file,&fstatbuf) == 0 148 | && getppid() > 1 ) { 149 | sleep(1); 150 | } 151 | 152 | return 0; 153 | } 154 | 155 | int main(int argc,char** argv) 156 | { 157 | char* refid = NULL; 158 | char* display = NULL; 159 | int refid_flag = 0; 160 | int wait_flag = 0; 161 | int create_flag = 0; 162 | int get_flag = 0; 163 | int remove_flag = 0; 164 | 165 | int local_flag = 1; 166 | int proxy_flag = 0; 167 | 168 | char* src_host = NULL; 169 | char* dst_host = NULL; 170 | char* user = NULL; 171 | 172 | char* ssh_cmd = NULL; 173 | char* ssh_args = NULL; 174 | 175 | char ref_file[256]; 176 | 177 | size_t subcmd_size=1024; 178 | char subcmd[1024]; 179 | char* p; 180 | 181 | /* options processing variables */ 182 | char* progname; 183 | char* optstring = "hi:crgwf:t:pd:u:s:o:"; 184 | char* short_options_desc = "Usage : %s [-h] -i refid [-g|c|r] [-w] \n\[-u user] [-t nodeB" 185 | " [-f nodeA [-d display]] [-s ssh_cmd] [-o ssh_args] ] \n"; 186 | int option; 187 | char* addon_options_desc="\n\ 188 | -h\t\tshow this message\n\ 189 | -i refid\tjob id to use as a reference\n\ 190 | -u user\t\tuser name to use during ssh connections\n\ 191 | -d display\tDISPLAY value to use instead of using refid\n\ 192 | \tto get the good one (proxy mode only)\n\ 193 | -f nodeA\tnode to use to initiate the X11 tunneling\n\ 194 | -t nodeB\tnode to connect to to create an X11 tunnel\n\ 195 | -c\t\tcreate local DISPLAY reference\n\ 196 | -r\t\tremove local DISPLAY reference\n\ 197 | -g\t\tget local DISPLAY reference (default)\n\ 198 | -w\t\twait until reference is removed or\n\ 199 | \t\tprocess is reattached to init\n"; 200 | 201 | /* init subcmd */ 202 | snprintf(subcmd,subcmd_size,"%s",X11_LIBEXEC_PROG); 203 | 204 | /* get current program name */ 205 | progname=rindex(argv[0],'/'); 206 | if(progname==NULL) 207 | progname=argv[0]; 208 | else 209 | progname++; 210 | 211 | /* process options */ 212 | while((option = getopt(argc,argv,optstring)) != -1) 213 | { 214 | switch(option) 215 | { 216 | case 'i' : 217 | refid=strdup(optarg); 218 | refid_flag=1; 219 | p = strdup(subcmd); 220 | snprintf(subcmd,subcmd_size,"%s -i %s",p,optarg); 221 | free(p); 222 | break; 223 | case 'd' : 224 | display=strdup(optarg); 225 | p = strdup(subcmd); 226 | snprintf(subcmd,subcmd_size,"%s -d %s",p,optarg); 227 | free(p); 228 | break; 229 | case 'u' : 230 | user=strdup(optarg); 231 | p = strdup(subcmd); 232 | snprintf(subcmd,subcmd_size,"%s -u %s",p,optarg); 233 | free(p); 234 | break; 235 | case 'c' : 236 | create_flag=1; 237 | p = strdup(subcmd); 238 | snprintf(subcmd,subcmd_size,"%s -c",p); 239 | free(p); 240 | break; 241 | case 'r' : 242 | remove_flag=1; 243 | p = strdup(subcmd); 244 | snprintf(subcmd,subcmd_size,"%s -r",p); 245 | free(p); 246 | break; 247 | case 'g' : 248 | get_flag=1; 249 | p = strdup(subcmd); 250 | snprintf(subcmd,subcmd_size,"%s -g",p); 251 | free(p); 252 | break; 253 | case 'w' : 254 | wait_flag=1; 255 | p = strdup(subcmd); 256 | snprintf(subcmd,subcmd_size,"%s -w",p); 257 | free(p); 258 | break; 259 | case 's' : 260 | ssh_cmd=strdup(optarg); 261 | p = strdup(subcmd); 262 | snprintf(subcmd,subcmd_size,"%s -s \"%s\"",p,optarg); 263 | free(p); 264 | break; 265 | case 'o' : 266 | ssh_args=strdup(optarg); 267 | p = strdup(subcmd); 268 | snprintf(subcmd,subcmd_size,"%s -o \"%s\"",p,optarg); 269 | free(p); 270 | break; 271 | case 'f' : 272 | src_host=strdup(optarg); 273 | break; 274 | case 't' : 275 | dst_host=strdup(optarg); 276 | local_flag=0; 277 | break; 278 | case 'p' : 279 | proxy_flag=1; 280 | break; 281 | case 'h' : 282 | default : 283 | fprintf(stdout,short_options_desc,progname); 284 | fprintf(stdout,"%s\n",addon_options_desc); 285 | exit(0); 286 | break; 287 | } 288 | } 289 | 290 | 291 | /* check id definition */ 292 | if ( ! refid_flag ) { 293 | fprintf(stderr,short_options_desc,progname); 294 | exit(1); 295 | } 296 | 297 | /* in proxy mode, read display value corresponding to the ref and use it */ 298 | if ( proxy_flag ) { 299 | /* read reference file DISPLAY value */ 300 | if ( display != NULL ) { 301 | /* set env DISPLAY value */ 302 | setenv("DISPLAY",display,1); 303 | free(display); 304 | } 305 | else if ( read_display_ref(refid,&display) == 0 ) { 306 | /* set env DISPLAY value */ 307 | setenv("DISPLAY",display,1); 308 | free(display); 309 | } 310 | else { 311 | fprintf(stderr,"error: proxy failed : unable to read " 312 | "DISPLAY value for ref=%s",refid); 313 | exit (60); 314 | } 315 | } 316 | 317 | /* if not in local mode, execute the remote command */ 318 | if ( ! local_flag ) { 319 | 320 | if ( ssh_cmd == NULL ) 321 | ssh_cmd = strdup(SPANK_X11_DEFAULT_SSH_CMD); 322 | 323 | if ( ssh_args == NULL ) 324 | ssh_args = strdup(SPANK_X11_DEFAULT_SSH_OPTS); 325 | 326 | /* if a source host is specified, use it in proxy mode */ 327 | if ( src_host != NULL ) { 328 | p = strdup(subcmd); 329 | if ( user != NULL ) 330 | snprintf(subcmd,subcmd_size,"%s -x %s -l %s" 331 | " %s '%s -p -t %s'",ssh_cmd,ssh_args, 332 | user,src_host,p,dst_host); 333 | else 334 | snprintf(subcmd,subcmd_size,"%s -x %s %s '%s" 335 | " -p -t %s'",ssh_cmd,ssh_args, 336 | src_host,p,dst_host); 337 | free(p); 338 | } 339 | /* otherwise launch the sub command on the target node with X11 support */ 340 | else { 341 | p = strdup(subcmd); 342 | if ( user != NULL ) 343 | snprintf(subcmd,subcmd_size,"%s -Y %s -l %s" 344 | " %s '%s'",ssh_cmd,ssh_args, 345 | user,dst_host,p); 346 | else 347 | snprintf(subcmd,subcmd_size,"%s -Y %s %s '%s'", 348 | ssh_cmd,ssh_args,dst_host,p); 349 | free(p); 350 | } 351 | 352 | return system(subcmd); 353 | } 354 | 355 | /* do creation if necessary */ 356 | if ( create_flag ) { 357 | write_display_ref(refid); 358 | } 359 | 360 | /* do get if necessary */ 361 | if ( get_flag ) { 362 | /* read reference file DISPLAY value */ 363 | if ( read_display_ref(refid,&display) == 0 ) { 364 | fprintf(stdout,"%s\n",display); 365 | fflush(stdout); 366 | free(display); 367 | } 368 | } 369 | 370 | /* do remove if necessary */ 371 | if ( remove_flag ) { 372 | remove_display_ref(refid); 373 | } 374 | 375 | /* wait for reference unlink or init reattachment */ 376 | if ( wait_flag ) { 377 | wait_display_ref(refid); 378 | } 379 | 380 | return 0; 381 | } 382 | -------------------------------------------------------------------------------- /slurm-spank-x11.spec: -------------------------------------------------------------------------------- 1 | Summary: Slurm spank plugin for X11 display support 2 | Name: slurm-spank-x11 3 | Version: 0.2.5 4 | Release: 1 5 | License: GPL 6 | Group: System Environment/Base 7 | Source0: %{name}-%{version}.tar.gz 8 | BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root 9 | 10 | BuildRequires: slurm-devel 11 | Requires: slurm 12 | 13 | %description 14 | x11 SLURM spank plugin enables to export X11 display on a part or all of the 15 | allocated nodes of SLURM jobs using openSSH. 16 | If openSSH is properly configured, users can use this feature transparently, 17 | otherwise they will need to enter as many passwords as connections to establish. 18 | 19 | %prep 20 | %setup -q 21 | 22 | %build 23 | %{__cc} -g -o slurm-spank-x11 slurm-spank-x11.c 24 | %{__cc} -g -shared -fPIC -o x11.so \ 25 | -D"X11_LIBEXEC_PROG=\"%{_libexecdir}/%{name}\"" \ 26 | slurm-spank-x11-plug.c 27 | 28 | %install 29 | rm -rf $RPM_BUILD_ROOT 30 | mkdir -p $RPM_BUILD_ROOT 31 | mkdir -p $RPM_BUILD_ROOT%{_libdir} 32 | mkdir -p $RPM_BUILD_ROOT%{_libdir}/slurm 33 | mkdir -p $RPM_BUILD_ROOT%{_libexecdir} 34 | mkdir -p $RPM_BUILD_ROOT%{_sysconfdir} 35 | mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/slurm 36 | mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/slurm/plugstack.conf.d 37 | install -m 755 slurm-spank-x11 $RPM_BUILD_ROOT%{_libexecdir} 38 | install -m 755 x11.so $RPM_BUILD_ROOT%{_libdir}/slurm 39 | install -m 644 plugstack.conf $RPM_BUILD_ROOT%{_sysconfdir}/slurm/plugstack.conf.d/x11.conf.example 40 | 41 | %clean 42 | rm -rf $RPM_BUILD_ROOT 43 | 44 | %files 45 | %defattr(-,root,root,-) 46 | %{_libexecdir}/slurm-spank-x11 47 | %{_libdir}/slurm/x11.so 48 | %config %{_sysconfdir}/slurm/plugstack.conf.d/x11.conf.example 49 | 50 | %changelog 51 | * Tue Nov 06 2012 HAUTREUX Matthieu - 0.2.5-1 52 | - Correct a bug in --x11=first|last management, ensuring that only the 53 | targeted nodes performed X11 related actions 54 | * Tue Nov 06 2012 HAUTREUX Matthieu - 0.2.4-1 55 | - Move to the usage of xpopen instead of standard popen function 56 | (security fix) 57 | * Mon Mar 5 2012 HAUTREUX Matthieu - 0.2.3-1 58 | - First public version including GPL headers 59 | * Mon Apr 12 2010 HAUTREUX Matthieu - 0.2.2-1 60 | - first production release supporting batch mode 61 | * Tue Dec 15 2009 HAUTREUX Matthieu - 0.2.1-1 62 | - redesign helper task to enable batch mode 63 | * Fri Nov 14 2008 HAUTREUX Matthieu - 64 | - 0.1.2 bug correction (x11 is no longer active by default) 65 | * Tue Oct 21 2008 HAUTREUX Matthieu - 66 | - Initial build. 67 | --------------------------------------------------------------------------------