lib/services/services

/* */
This source file includes following definitions.
sigchld_setup
sigchld_open
sigchld_close
sigchld_received
sigchld_cleanup
sigchld_handler
sigchld_setup
sigchld_open
sigchld_close
sigchld_received
sigchld_cleanup
close_pipe
svc_read_output
dispatch_stdout
dispatch_stderr
pipe_out_done
pipe_err_done
set_ocf_env
set_ocf_env_with_prefix
set_alert_env
add_action_env_vars
pipe_in_single_parameter
pipe_in_action_stdin_parameters
recurring_action_timer
services__finalize_async_op
close_op_input
finish_op_output
log_op_output
parse_exit_reason_from_stderr
async_action_complete
services__generic_error
services__not_installed_error
services__authorization_error
services__configuration_error
services__handle_exec_error
exit_child
action_launch_child
wait_for_sync_result
services__execute_file
services_os_get_single_directory_list
services_os_get_directory_list
   1 /*
   2  * Copyright 2010-2021 the Pacemaker project contributors
   3  *
   4  * The version control history for this file may have further details.
   5  *
   6  * This source code is licensed under the GNU Lesser General Public License
   7  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
   8  */
   9 
  10 #include <crm_internal.h>
  11 
  12 #ifndef _GNU_SOURCE
  13 #  define _GNU_SOURCE
  14 #endif
  15 
  16 #include <sys/types.h>
  17 #include <sys/stat.h>
  18 #include <sys/wait.h>
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <dirent.h>
  22 #include <grp.h>
  23 #include <string.h>
  24 #include <sys/time.h>
  25 #include <sys/resource.h>
  26 
  27 #include "crm/crm.h"
  28 #include "crm/common/mainloop.h"
  29 #include "crm/services.h"
  30 #include "crm/services_internal.h"
  31 
  32 #include "services_private.h"
  33 
  34 static void close_pipe(int fildes[]);
  35 
  36 /* We have two alternative ways of handling SIGCHLD when synchronously waiting
  37  * for spawned processes to complete. Both rely on polling a file descriptor to
  38  * discover SIGCHLD events.
  39  *
  40  * If sys/signalfd.h is available (e.g. on Linux), we call signalfd() to
  41  * generate the file descriptor. Otherwise, we use the "self-pipe trick"
  42  * (opening a pipe and writing a byte to it when SIGCHLD is received).
  43  */
  44 #ifdef HAVE_SYS_SIGNALFD_H
  45 
  46 // signalfd() implementation
  47 
  48 #include <sys/signalfd.h>
  49 
  50 // Everything needed to manage SIGCHLD handling
  51 struct sigchld_data_s {
  52     sigset_t mask;      // Signals to block now (including SIGCHLD)
  53     sigset_t old_mask;  // Previous set of blocked signals
  54 };
  55 
  56 // Initialize SIGCHLD data and prepare for use
  57 static bool
  58 sigchld_setup(struct sigchld_data_s *data)
     /*  */
  59 {
  60     sigemptyset(&(data->mask));
  61     sigaddset(&(data->mask), SIGCHLD);
  62 
  63     sigemptyset(&(data->old_mask));
  64 
  65     // Block SIGCHLD (saving previous set of blocked signals to restore later)
  66     if (sigprocmask(SIG_BLOCK, &(data->mask), &(data->old_mask)) < 0) {
  67         crm_err("Wait for child process completion failed: %s "
  68                 CRM_XS " source=sigprocmask", pcmk_strerror(errno));
  69         return false;
  70     }
  71     return true;
  72 }
  73 
  74 // Get a file descriptor suitable for polling for SIGCHLD events
  75 static int
  76 sigchld_open(struct sigchld_data_s *data)
     /*  */
  77 {
  78     int fd;
  79 
  80     CRM_CHECK(data != NULL, return -1);
  81 
  82     fd = signalfd(-1, &(data->mask), SFD_NONBLOCK);
  83     if (fd < 0) {
  84         crm_err("Wait for child process completion failed: %s "
  85                 CRM_XS " source=signalfd", pcmk_strerror(errno));
  86     }
  87     return fd;
  88 }
  89 
  90 // Close a file descriptor returned by sigchld_open()
  91 static void
  92 sigchld_close(int fd)
     /*  */
  93 {
  94     if (fd > 0) {
  95         close(fd);
  96     }
  97 }
  98 
  99 // Return true if SIGCHLD was received from polled fd
 100 static bool
 101 sigchld_received(int fd)
     /*  */
 102 {
 103     struct signalfd_siginfo fdsi;
 104     ssize_t s;
 105 
 106     if (fd < 0) {
 107         return false;
 108     }
 109     s = read(fd, &fdsi, sizeof(struct signalfd_siginfo));
 110     if (s != sizeof(struct signalfd_siginfo)) {
 111         crm_err("Wait for child process completion failed: %s "
 112                 CRM_XS " source=read", pcmk_strerror(errno));
 113 
 114     } else if (fdsi.ssi_signo == SIGCHLD) {
 115         return true;
 116     }
 117     return false;
 118 }
 119 
 120 // Do anything needed after done waiting for SIGCHLD
 121 static void
 122 sigchld_cleanup(struct sigchld_data_s *data)
     /*  */
 123 {
 124     // Restore the original set of blocked signals
 125     if ((sigismember(&(data->old_mask), SIGCHLD) == 0)
 126         && (sigprocmask(SIG_UNBLOCK, &(data->mask), NULL) < 0)) {
 127         crm_warn("Could not clean up after child process completion: %s",
 128                  pcmk_strerror(errno));
 129     }
 130 }
 131 
 132 #else // HAVE_SYS_SIGNALFD_H not defined
 133 
 134 // Self-pipe implementation (see above for function descriptions)
 135 
 136 struct sigchld_data_s {
 137     int pipe_fd[2];             // Pipe file descriptors
 138     struct sigaction sa;        // Signal handling info (with SIGCHLD)
 139     struct sigaction old_sa;    // Previous signal handling info
 140 };
 141 
 142 // We need a global to use in the signal handler
 143 volatile struct sigchld_data_s *last_sigchld_data = NULL;
 144 
 145 static void
 146 sigchld_handler()
     /*  */
 147 {
 148     // We received a SIGCHLD, so trigger pipe polling
 149     if ((last_sigchld_data != NULL)
 150         && (last_sigchld_data->pipe_fd[1] >= 0)
 151         && (write(last_sigchld_data->pipe_fd[1], "", 1) == -1)) {
 152         crm_err("Wait for child process completion failed: %s "
 153                 CRM_XS " source=write", pcmk_strerror(errno));
 154     }
 155 }
 156 
 157 static bool
 158 sigchld_setup(struct sigchld_data_s *data)
     /*  */
 159 {
 160     int rc;
 161 
 162     data->pipe_fd[0] = data->pipe_fd[1] = -1;
 163 
 164     if (pipe(data->pipe_fd) == -1) {
 165         crm_err("Wait for child process completion failed: %s "
 166                 CRM_XS " source=pipe", pcmk_strerror(errno));
 167         return false;
 168     }
 169 
 170     rc = pcmk__set_nonblocking(data->pipe_fd[0]);
 171     if (rc != pcmk_rc_ok) {
 172         crm_warn("Could not set pipe input non-blocking: %s " CRM_XS " rc=%d",
 173                  pcmk_rc_str(rc), rc);
 174     }
 175     rc = pcmk__set_nonblocking(data->pipe_fd[1]);
 176     if (rc != pcmk_rc_ok) {
 177         crm_warn("Could not set pipe output non-blocking: %s " CRM_XS " rc=%d",
 178                  pcmk_rc_str(rc), rc);
 179     }
 180 
 181     // Set SIGCHLD handler
 182     data->sa.sa_handler = sigchld_handler;
 183     data->sa.sa_flags = 0;
 184     sigemptyset(&(data->sa.sa_mask));
 185     if (sigaction(SIGCHLD, &(data->sa), &(data->old_sa)) < 0) {
 186         crm_err("Wait for child process completion failed: %s "
 187                 CRM_XS " source=sigaction", pcmk_strerror(errno));
 188     }
 189 
 190     // Remember data for use in signal handler
 191     last_sigchld_data = data;
 192     return true;
 193 }
 194 
 195 static int
 196 sigchld_open(struct sigchld_data_s *data)
     /*  */
 197 {
 198     CRM_CHECK(data != NULL, return -1);
 199     return data->pipe_fd[0];
 200 }
 201 
 202 static void
 203 sigchld_close(int fd)
     /*  */
 204 {
 205     // Pipe will be closed in sigchld_cleanup()
 206     return;
 207 }
 208 
 209 static bool
 210 sigchld_received(int fd)
     /*  */
 211 {
 212     char ch;
 213 
 214     if (fd < 0) {
 215         return false;
 216     }
 217 
 218     // Clear out the self-pipe
 219     while (read(fd, &ch, 1) == 1) /*omit*/;
 220     return true;
 221 }
 222 
 223 static void
 224 sigchld_cleanup(struct sigchld_data_s *data)
     /*  */
 225 {
 226     // Restore the previous SIGCHLD handler
 227     if (sigaction(SIGCHLD, &(data->old_sa), NULL) < 0) {
 228         crm_warn("Could not clean up after child process completion: %s",
 229                  pcmk_strerror(errno));
 230     }
 231 
 232     close_pipe(data->pipe_fd);
 233 }
 234 
 235 #endif
 236 
 237 /*!
 238  * \internal
 239  * \brief Close the two file descriptors of a pipe
 240  *
 241  * \param[in] fildes  Array of file descriptors opened by pipe()
 242  */
 243 static void
 244 close_pipe(int fildes[])
     /*  */
 245 {
 246     if (fildes[0] >= 0) {
 247         close(fildes[0]);
 248         fildes[0] = -1;
 249     }
 250     if (fildes[1] >= 0) {
 251         close(fildes[1]);
 252         fildes[1] = -1;
 253     }
 254 }
 255 
 256 static gboolean
 257 svc_read_output(int fd, svc_action_t * op, bool is_stderr)
     /*  */
 258 {
 259     char *data = NULL;
 260     int rc = 0, len = 0;
 261     char buf[500];
 262     static const size_t buf_read_len = sizeof(buf) - 1;
 263 
 264 
 265     if (fd < 0) {
 266         crm_trace("No fd for %s", op->id);
 267         return FALSE;
 268     }
 269 
 270     if (is_stderr && op->stderr_data) {
 271         len = strlen(op->stderr_data);
 272         data = op->stderr_data;
 273         crm_trace("Reading %s stderr into offset %d", op->id, len);
 274 
 275     } else if (is_stderr == FALSE && op->stdout_data) {
 276         len = strlen(op->stdout_data);
 277         data = op->stdout_data;
 278         crm_trace("Reading %s stdout into offset %d", op->id, len);
 279 
 280     } else {
 281         crm_trace("Reading %s %s into offset %d", op->id, is_stderr?"stderr":"stdout", len);
 282     }
 283 
 284     do {
 285         rc = read(fd, buf, buf_read_len);
 286         if (rc > 0) {
 287             buf[rc] = 0;
 288             crm_trace("Got %d chars: %.80s", rc, buf);
 289             data = pcmk__realloc(data, len + rc + 1);
 290             len += sprintf(data + len, "%s", buf);
 291 
 292         } else if (errno != EINTR) {
 293             /* error or EOF
 294              * Cleanup happens in pipe_done()
 295              */
 296             rc = FALSE;
 297             break;
 298         }
 299 
 300     } while (rc == buf_read_len || rc < 0);
 301 
 302     if (is_stderr) {
 303         op->stderr_data = data;
 304     } else {
 305         op->stdout_data = data;
 306     }
 307 
 308     return rc;
 309 }
 310 
 311 static int
 312 dispatch_stdout(gpointer userdata)
     /*  */
 313 {
 314     svc_action_t *op = (svc_action_t *) userdata;
 315 
 316     return svc_read_output(op->opaque->stdout_fd, op, FALSE);
 317 }
 318 
 319 static int
 320 dispatch_stderr(gpointer userdata)
     /*  */
 321 {
 322     svc_action_t *op = (svc_action_t *) userdata;
 323 
 324     return svc_read_output(op->opaque->stderr_fd, op, TRUE);
 325 }
 326 
 327 static void
 328 pipe_out_done(gpointer user_data)
     /*  */
 329 {
 330     svc_action_t *op = (svc_action_t *) user_data;
 331 
 332     crm_trace("%p", op);
 333 
 334     op->opaque->stdout_gsource = NULL;
 335     if (op->opaque->stdout_fd > STDOUT_FILENO) {
 336         close(op->opaque->stdout_fd);
 337     }
 338     op->opaque->stdout_fd = -1;
 339 }
 340 
 341 static void
 342 pipe_err_done(gpointer user_data)
     /*  */
 343 {
 344     svc_action_t *op = (svc_action_t *) user_data;
 345 
 346     op->opaque->stderr_gsource = NULL;
 347     if (op->opaque->stderr_fd > STDERR_FILENO) {
 348         close(op->opaque->stderr_fd);
 349     }
 350     op->opaque->stderr_fd = -1;
 351 }
 352 
 353 static struct mainloop_fd_callbacks stdout_callbacks = {
 354     .dispatch = dispatch_stdout,
 355     .destroy = pipe_out_done,
 356 };
 357 
 358 static struct mainloop_fd_callbacks stderr_callbacks = {
 359     .dispatch = dispatch_stderr,
 360     .destroy = pipe_err_done,
 361 };
 362 
 363 static void
 364 set_ocf_env(const char *key, const char *value, gpointer user_data)
     /*  */
 365 {
 366     if (setenv(key, value, 1) != 0) {
 367         crm_perror(LOG_ERR, "setenv failed for key:%s and value:%s", key, value);
 368     }
 369 }
 370 
 371 static void
 372 set_ocf_env_with_prefix(gpointer key, gpointer value, gpointer user_data)
     /*  */
 373 {
 374     char buffer[500];
 375 
 376     snprintf(buffer, sizeof(buffer), strcmp(key, "OCF_CHECK_LEVEL") != 0 ? "OCF_RESKEY_%s" : "%s", (char *)key);
 377     set_ocf_env(buffer, value, user_data);
 378 }
 379 
 380 static void
 381 set_alert_env(gpointer key, gpointer value, gpointer user_data)
     /*  */
 382 {
 383     int rc;
 384 
 385     if (value != NULL) {
 386         rc = setenv(key, value, 1);
 387     } else {
 388         rc = unsetenv(key);
 389     }
 390 
 391     if (rc < 0) {
 392         crm_perror(LOG_ERR, "setenv %s=%s",
 393                   (char*)key, (value? (char*)value : ""));
 394     } else {
 395         crm_trace("setenv %s=%s", (char*)key, (value? (char*)value : ""));
 396     }
 397 }
 398 
 399 /*!
 400  * \internal
 401  * \brief Add environment variables suitable for an action
 402  *
 403  * \param[in] op  Action to use
 404  */
 405 static void
 406 add_action_env_vars(const svc_action_t *op)
     /*  */
 407 {
 408     void (*env_setter)(gpointer, gpointer, gpointer) = NULL;
 409     if (op->agent == NULL) {
 410         env_setter = set_alert_env;  /* we deal with alert handler */
 411 
 412     } else if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_OCF, pcmk__str_casei)) {
 413         env_setter = set_ocf_env_with_prefix;
 414     }
 415 
 416     if (env_setter != NULL && op->params != NULL) {
 417         g_hash_table_foreach(op->params, env_setter, NULL);
 418     }
 419 
 420     if (env_setter == NULL || env_setter == set_alert_env) {
 421         return;
 422     }
 423 
 424     set_ocf_env("OCF_RA_VERSION_MAJOR", PCMK_OCF_MAJOR_VERSION, NULL);
 425     set_ocf_env("OCF_RA_VERSION_MINOR", PCMK_OCF_MINOR_VERSION, NULL);
 426     set_ocf_env("OCF_ROOT", OCF_ROOT_DIR, NULL);
 427     set_ocf_env("OCF_EXIT_REASON_PREFIX", PCMK_OCF_REASON_PREFIX, NULL);
 428 
 429     if (op->rsc) {
 430         set_ocf_env("OCF_RESOURCE_INSTANCE", op->rsc, NULL);
 431     }
 432 
 433     if (op->agent != NULL) {
 434         set_ocf_env("OCF_RESOURCE_TYPE", op->agent, NULL);
 435     }
 436 
 437     /* Notes: this is not added to specification yet. Sept 10,2004 */
 438     if (op->provider != NULL) {
 439         set_ocf_env("OCF_RESOURCE_PROVIDER", op->provider, NULL);
 440     }
 441 }
 442 
 443 static void
 444 pipe_in_single_parameter(gpointer key, gpointer value, gpointer user_data)
     /*  */
 445 {
 446     svc_action_t *op = user_data;
 447     char *buffer = crm_strdup_printf("%s=%s\n", (char *)key, (char *) value);
 448     int ret, total = 0, len = strlen(buffer);
 449 
 450     do {
 451         errno = 0;
 452         ret = write(op->opaque->stdin_fd, buffer + total, len - total);
 453         if (ret > 0) {
 454             total += ret;
 455         }
 456 
 457     } while ((errno == EINTR) && (total < len));
 458     free(buffer);
 459 }
 460 
 461 /*!
 462  * \internal
 463  * \brief Pipe parameters in via stdin for action
 464  *
 465  * \param[in] op  Action to use
 466  */
 467 static void
 468 pipe_in_action_stdin_parameters(const svc_action_t *op)
     /*  */
 469 {
 470     crm_debug("sending args");
 471     if (op->params) {
 472         g_hash_table_foreach(op->params, pipe_in_single_parameter, (gpointer) op);
 473     }
 474 }
 475 
 476 gboolean
 477 recurring_action_timer(gpointer data)
     /*  */
 478 {
 479     svc_action_t *op = data;
 480 
 481     crm_debug("Scheduling another invocation of %s", op->id);
 482 
 483     /* Clean out the old result */
 484     free(op->stdout_data);
 485     op->stdout_data = NULL;
 486     free(op->stderr_data);
 487     op->stderr_data = NULL;
 488     op->opaque->repeat_timer = 0;
 489 
 490     services_action_async(op, NULL);
 491     return FALSE;
 492 }
 493 
 494 /*!
 495  * \internal
 496  * \brief Finalize handling of an asynchronous operation
 497  *
 498  * Given a completed asynchronous operation, cancel or reschedule it as
 499  * appropriate if recurring, call its callback if registered, stop tracking it,
 500  * and clean it up.
 501  *
 502  * \param[in,out] op  Operation to finalize
 503  *
 504  * \return Standard Pacemaker return code
 505  * \retval EINVAL      Caller supplied NULL or invalid \p op
 506  * \retval EBUSY       Uncanceled recurring action has only been cleaned up
 507  * \retval pcmk_rc_ok  Action has been freed
 508  *
 509  * \note If the return value is not pcmk_rc_ok, the caller is responsible for
 510  *       freeing the action.
 511  */
 512 int
 513 services__finalize_async_op(svc_action_t *op)
     /*  */
 514 {
 515     CRM_CHECK((op != NULL) && !(op->synchronous), return EINVAL);
 516 
 517     if (op->interval_ms != 0) {
 518         // Recurring operations must be either cancelled or rescheduled
 519         if (op->cancel) {
 520             services__set_cancelled(op);
 521             cancel_recurring_action(op);
 522         } else {
 523             op->opaque->repeat_timer = g_timeout_add(op->interval_ms,
 524                                                      recurring_action_timer,
 525                                                      (void *) op);
 526         }
 527     }
 528 
 529     if (op->opaque->callback != NULL) {
 530         op->opaque->callback(op);
 531     }
 532 
 533     // Stop tracking the operation (as in-flight or blocked)
 534     op->pid = 0;
 535     services_untrack_op(op);
 536 
 537     if ((op->interval_ms != 0) && !(op->cancel)) {
 538         // Do not free recurring actions (they will get freed when cancelled)
 539         services_action_cleanup(op);
 540         return EBUSY;
 541     }
 542 
 543     services_action_free(op);
 544     return pcmk_rc_ok;
 545 }
 546 
 547 static void
 548 close_op_input(svc_action_t *op)
     /*  */
 549 {
 550     if (op->opaque->stdin_fd >= 0) {
 551         close(op->opaque->stdin_fd);
 552     }
 553 }
 554 
 555 static void
 556 finish_op_output(svc_action_t *op, bool is_stderr)
     /*  */
 557 {
 558     mainloop_io_t **source;
 559     int fd;
 560 
 561     if (is_stderr) {
 562         source = &(op->opaque->stderr_gsource);
 563         fd = op->opaque->stderr_fd;
 564     } else {
 565         source = &(op->opaque->stdout_gsource);
 566         fd = op->opaque->stdout_fd;
 567     }
 568 
 569     if (op->synchronous || *source) {
 570         crm_trace("Finish reading %s[%d] %s",
 571                   op->id, op->pid, (is_stderr? "stdout" : "stderr"));
 572         svc_read_output(fd, op, is_stderr);
 573         if (op->synchronous) {
 574             close(fd);
 575         } else {
 576             mainloop_del_fd(*source);
 577             *source = NULL;
 578         }
 579     }
 580 }
 581 
 582 // Log an operation's stdout and stderr
 583 static void
 584 log_op_output(svc_action_t *op)
     /*  */
 585 {
 586     char *prefix = crm_strdup_printf("%s[%d] error output", op->id, op->pid);
 587 
 588     crm_log_output(LOG_NOTICE, prefix, op->stderr_data);
 589     strcpy(prefix + strlen(prefix) - strlen("error output"), "output");
 590     crm_log_output(LOG_DEBUG, prefix, op->stdout_data);
 591     free(prefix);
 592 }
 593 
 594 // Truncate exit reasons at this many characters
 595 #define EXIT_REASON_MAX_LEN 128
 596 
 597 static void
 598 parse_exit_reason_from_stderr(svc_action_t *op)
     /*  */
 599 {
 600     const char *reason_start = NULL;
 601     const char *reason_end = NULL;
 602     const int prefix_len = strlen(PCMK_OCF_REASON_PREFIX);
 603 
 604     if ((op->stderr_data == NULL) ||
 605         // Only OCF agents have exit reasons in stderr
 606         !pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_OCF, pcmk__str_none)) {
 607         return;
 608     }
 609 
 610     // Find the last occurrence of the magic string indicating an exit reason
 611     for (const char *cur = strstr(op->stderr_data, PCMK_OCF_REASON_PREFIX);
 612          cur != NULL; cur = strstr(cur, PCMK_OCF_REASON_PREFIX)) {
 613 
 614         cur += prefix_len; // Skip over magic string
 615         reason_start = cur;
 616     }
 617 
 618     if ((reason_start == NULL) || (reason_start[0] == '\n')
 619         || (reason_start[0] == '\0')) {
 620         return; // No or empty exit reason
 621     }
 622 
 623     // Exit reason goes to end of line (or end of output)
 624     reason_end = strchr(reason_start, '\n');
 625     if (reason_end == NULL) {
 626         reason_end = reason_start + strlen(reason_start);
 627     }
 628 
 629     // Limit size of exit reason to something reasonable
 630     if (reason_end > (reason_start + EXIT_REASON_MAX_LEN)) {
 631         reason_end = reason_start + EXIT_REASON_MAX_LEN;
 632     }
 633 
 634     free(op->opaque->exit_reason);
 635     op->opaque->exit_reason = strndup(reason_start, reason_end - reason_start);
 636 }
 637 
 638 /*!
 639  * \internal
 640  * \brief Process the completion of an asynchronous child process
 641  *
 642  * \param[in] p         Child process that completed
 643  * \param[in] pid       Process ID of child
 644  * \param[in] core      (unused)
 645  * \param[in] signo     Signal that interrupted child, if any
 646  * \param[in] exitcode  Exit status of child process
 647  */
 648 static void
 649 async_action_complete(mainloop_child_t *p, pid_t pid, int core, int signo,
     /*  */
 650                       int exitcode)
 651 {
 652     svc_action_t *op = mainloop_child_userdata(p);
 653 
 654     mainloop_clear_child_userdata(p);
 655     CRM_CHECK(op->pid == pid,
 656               services__set_result(op, services__generic_error(op),
 657                                    PCMK_EXEC_ERROR, "Bug in mainloop handling");
 658               return);
 659 
 660     /* Depending on the priority the mainloop gives the stdout and stderr
 661      * file descriptors, this function could be called before everything has
 662      * been read from them, so force a final read now.
 663      */
 664     finish_op_output(op, true);
 665     finish_op_output(op, false);
 666 
 667     close_op_input(op);
 668 
 669     if (signo == 0) {
 670         crm_debug("%s[%d] exited with status %d", op->id, op->pid, exitcode);
 671         services__set_result(op, exitcode, PCMK_EXEC_DONE, NULL);
 672         log_op_output(op);
 673         parse_exit_reason_from_stderr(op);
 674 
 675     } else if (mainloop_child_timeout(p)) {
 676         crm_warn("%s[%d] timed out after %dms", op->id, op->pid, op->timeout);
 677         services__set_result(op, services__generic_error(op), PCMK_EXEC_TIMEOUT,
 678                              "Process did not exit within specified timeout");
 679 
 680     } else if (op->cancel) {
 681         /* If an in-flight recurring operation was killed because it was
 682          * cancelled, don't treat that as a failure.
 683          */
 684         crm_info("%s[%d] terminated with signal %d (%s)",
 685                  op->id, op->pid, signo, strsignal(signo));
 686         services__set_result(op, PCMK_OCF_OK, PCMK_EXEC_CANCELLED, NULL);
 687 
 688     } else {
 689         crm_warn("%s[%d] terminated with signal %d (%s)",
 690                  op->id, op->pid, signo, strsignal(signo));
 691         services__set_result(op, PCMK_OCF_UNKNOWN_ERROR, PCMK_EXEC_ERROR,
 692                              "Process interrupted by signal");
 693     }
 694 
 695     services__finalize_async_op(op);
 696 }
 697 
 698 /*!
 699  * \internal
 700  * \brief Return agent standard's exit status for "generic error"
 701  *
 702  * When returning an internal error for an action, a value that is appropriate
 703  * to the action's agent standard must be used. This function returns a value
 704  * appropriate for errors in general.
 705  *
 706  * \param[in] op  Action that error is for
 707  *
 708  * \return Exit status appropriate to agent standard
 709  * \note Actions without a standard will get PCMK_OCF_UNKNOWN_ERROR.
 710  */
 711 int
 712 services__generic_error(svc_action_t *op)
     /*  */
 713 {
 714     if ((op == NULL) || (op->standard == NULL)) {
 715         return PCMK_OCF_UNKNOWN_ERROR;
 716     }
 717 
 718     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)
 719         && pcmk__str_eq(op->action, "status", pcmk__str_casei)) {
 720 
 721         return PCMK_LSB_STATUS_UNKNOWN;
 722     }
 723 
 724 #if SUPPORT_NAGIOS
 725     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
 726         return NAGIOS_STATE_UNKNOWN;
 727     }
 728 #endif
 729 
 730     return PCMK_OCF_UNKNOWN_ERROR;
 731 }
 732 
 733 /*!
 734  * \internal
 735  * \brief Return agent standard's exit status for "not installed"
 736  *
 737  * When returning an internal error for an action, a value that is appropriate
 738  * to the action's agent standard must be used. This function returns a value
 739  * appropriate for "not installed" errors.
 740  *
 741  * \param[in] op  Action that error is for
 742  *
 743  * \return Exit status appropriate to agent standard
 744  * \note Actions without a standard will get PCMK_OCF_UNKNOWN_ERROR.
 745  */
 746 int
 747 services__not_installed_error(svc_action_t *op)
     /*  */
 748 {
 749     if ((op == NULL) || (op->standard == NULL)) {
 750         return PCMK_OCF_UNKNOWN_ERROR;
 751     }
 752 
 753     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)
 754         && pcmk__str_eq(op->action, "status", pcmk__str_casei)) {
 755 
 756         return PCMK_LSB_STATUS_NOT_INSTALLED;
 757     }
 758 
 759 #if SUPPORT_NAGIOS
 760     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
 761         return NAGIOS_STATE_UNKNOWN;
 762     }
 763 #endif
 764 
 765     return PCMK_OCF_NOT_INSTALLED;
 766 }
 767 
 768 /*!
 769  * \internal
 770  * \brief Return agent standard's exit status for "insufficient privileges"
 771  *
 772  * When returning an internal error for an action, a value that is appropriate
 773  * to the action's agent standard must be used. This function returns a value
 774  * appropriate for "insufficient privileges" errors.
 775  *
 776  * \param[in] op  Action that error is for
 777  *
 778  * \return Exit status appropriate to agent standard
 779  * \note Actions without a standard will get PCMK_OCF_UNKNOWN_ERROR.
 780  */
 781 int
 782 services__authorization_error(svc_action_t *op)
     /*  */
 783 {
 784     if ((op == NULL) || (op->standard == NULL)) {
 785         return PCMK_OCF_UNKNOWN_ERROR;
 786     }
 787 
 788     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)
 789         && pcmk__str_eq(op->action, "status", pcmk__str_casei)) {
 790 
 791         return PCMK_LSB_STATUS_INSUFFICIENT_PRIV;
 792     }
 793 
 794 #if SUPPORT_NAGIOS
 795     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
 796         return NAGIOS_INSUFFICIENT_PRIV;
 797     }
 798 #endif
 799 
 800     return PCMK_OCF_INSUFFICIENT_PRIV;
 801 }
 802 
 803 /*!
 804  * \internal
 805  * \brief Return agent standard's exit status for "not configured"
 806  *
 807  * When returning an internal error for an action, a value that is appropriate
 808  * to the action's agent standard must be used. This function returns a value
 809  * appropriate for "not configured" errors.
 810  *
 811  * \param[in] op        Action that error is for
 812  * \param[in] is_fatal  Whether problem is cluster-wide instead of only local
 813  *
 814  * \return Exit status appropriate to agent standard
 815  * \note Actions without a standard will get PCMK_OCF_UNKNOWN_ERROR.
 816  */
 817 int
 818 services__configuration_error(svc_action_t *op, bool is_fatal)
     /*  */
 819 {
 820     if ((op == NULL) || (op->standard == NULL)) {
 821         return PCMK_OCF_UNKNOWN_ERROR;
 822     }
 823 
 824     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)
 825         && pcmk__str_eq(op->action, "status", pcmk__str_casei)) {
 826 
 827         return PCMK_LSB_NOT_CONFIGURED;
 828     }
 829 
 830 #if SUPPORT_NAGIOS
 831     if (pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
 832         return NAGIOS_STATE_UNKNOWN;
 833     }
 834 #endif
 835 
 836     return is_fatal? PCMK_OCF_NOT_CONFIGURED : PCMK_OCF_INVALID_PARAM;
 837 }
 838 
 839 
 840 /*!
 841  * \internal
 842  * \brief Set operation rc and status per errno from stat(), fork() or execvp()
 843  *
 844  * \param[in,out] op     Operation to set rc and status for
 845  * \param[in]     error  Value of errno after system call
 846  *
 847  * \return void
 848  */
 849 void
 850 services__handle_exec_error(svc_action_t * op, int error)
     /*  */
 851 {
 852     switch (error) {   /* see execve(2), stat(2) and fork(2) */
 853         case ENOENT:   /* No such file or directory */
 854         case EISDIR:   /* Is a directory */
 855         case ENOTDIR:  /* Path component is not a directory */
 856         case EINVAL:   /* Invalid executable format */
 857         case ENOEXEC:  /* Invalid executable format */
 858             services__set_result(op, services__not_installed_error(op),
 859                                  PCMK_EXEC_NOT_INSTALLED, pcmk_rc_str(error));
 860             break;
 861         case EACCES:   /* permission denied (various errors) */
 862         case EPERM:    /* permission denied (various errors) */
 863             services__set_result(op, services__authorization_error(op),
 864                                  PCMK_EXEC_ERROR, pcmk_rc_str(error));
 865             break;
 866         default:
 867             services__set_result(op, services__generic_error(op),
 868                                  PCMK_EXEC_ERROR, pcmk_rc_str(error));
 869     }
 870 }
 871 
 872 /*!
 873  * \internal
 874  * \brief Exit a child process that failed before executing agent
 875  *
 876  * \param[in] op           Action that failed
 877  * \param[in] exit_status  Exit status code to use
 878  * \param[in] exit_reason  Exit reason to output if for OCF agent
 879  */
 880 static void
 881 exit_child(svc_action_t *op, int exit_status, const char *exit_reason)
     /*  */
 882 {
 883     if ((op != NULL) && (exit_reason != NULL)
 884         && pcmk__str_eq(op->standard, PCMK_RESOURCE_CLASS_OCF,
 885                         pcmk__str_none)) {
 886         fprintf(stderr, PCMK_OCF_REASON_PREFIX "%s\n", exit_reason);
 887     }
 888     _exit(exit_status);
 889 }
 890 
 891 static void
 892 action_launch_child(svc_action_t *op)
     /*  */
 893 {
 894     int rc;
 895 
 896     /* SIGPIPE is ignored (which is different from signal blocking) by the gnutls library.
 897      * Depending on the libqb version in use, libqb may set SIGPIPE to be ignored as well. 
 898      * We do not want this to be inherited by the child process. By resetting this the signal
 899      * to the default behavior, we avoid some potential odd problems that occur during OCF
 900      * scripts when SIGPIPE is ignored by the environment. */
 901     signal(SIGPIPE, SIG_DFL);
 902 
 903 #if defined(HAVE_SCHED_SETSCHEDULER)
 904     if (sched_getscheduler(0) != SCHED_OTHER) {
 905         struct sched_param sp;
 906 
 907         memset(&sp, 0, sizeof(sp));
 908         sp.sched_priority = 0;
 909 
 910         if (sched_setscheduler(0, SCHED_OTHER, &sp) == -1) {
 911             crm_warn("Could not reset scheduling policy for %s", op->id);
 912         }
 913     }
 914 #endif
 915     if (setpriority(PRIO_PROCESS, 0, 0) == -1) {
 916         crm_warn("Could not reset process priority for %s", op->id);
 917     }
 918 
 919     /* Man: The call setpgrp() is equivalent to setpgid(0,0)
 920      * _and_ compiles on BSD variants too
 921      * need to investigate if it works the same too.
 922      */
 923     setpgid(0, 0);
 924 
 925     pcmk__close_fds_in_child(false);
 926 
 927     /* It would be nice if errors in this function could be reported as
 928      * execution status (for example, PCMK_EXEC_NO_SECRETS for the secrets error
 929      * below) instead of exit status. However, we've already forked, so
 930      * exit status is all we have. At least for OCF actions, we can output an
 931      * exit reason for the parent to parse.
 932      */
 933 
 934 #if SUPPORT_CIBSECRETS
 935     rc = pcmk__substitute_secrets(op->rsc, op->params);
 936     if (rc != pcmk_rc_ok) {
 937         if (pcmk__str_eq(op->action, "stop", pcmk__str_casei)) {
 938             crm_info("Proceeding with stop operation for %s "
 939                      "despite being unable to load CIB secrets (%s)",
 940                      op->rsc, pcmk_rc_str(rc));
 941         } else {
 942             crm_err("Considering %s unconfigured "
 943                     "because unable to load CIB secrets: %s",
 944                      op->rsc, pcmk_rc_str(rc));
 945             exit_child(op, services__configuration_error(op, false),
 946                        "Unable to load CIB secrets");
 947         }
 948     }
 949 #endif
 950 
 951     add_action_env_vars(op);
 952 
 953     /* Become the desired user */
 954     if (op->opaque->uid && (geteuid() == 0)) {
 955 
 956         // If requested, set effective group
 957         if (op->opaque->gid && (setgid(op->opaque->gid) < 0)) {
 958             crm_err("Considering %s unauthorized because could not set "
 959                     "child group to %d: %s",
 960                     op->id, op->opaque->gid, strerror(errno));
 961             exit_child(op, services__authorization_error(op),
 962                        "Could not set group for child process");
 963         }
 964 
 965         // Erase supplementary group list
 966         // (We could do initgroups() if we kept a copy of the username)
 967         if (setgroups(0, NULL) < 0) {
 968             crm_err("Considering %s unauthorized because could not "
 969                     "clear supplementary groups: %s", op->id, strerror(errno));
 970             exit_child(op, services__authorization_error(op),
 971                        "Could not clear supplementary groups for child process");
 972         }
 973 
 974         // Set effective user
 975         if (setuid(op->opaque->uid) < 0) {
 976             crm_err("Considering %s unauthorized because could not set user "
 977                     "to %d: %s", op->id, op->opaque->uid, strerror(errno));
 978             exit_child(op, services__authorization_error(op),
 979                        "Could not set user for child process");
 980         }
 981     }
 982 
 983     // Execute the agent (doesn't return if successful)
 984     execvp(op->opaque->exec, op->opaque->args);
 985 
 986     // An earlier stat() should have avoided most possible errors
 987     rc = errno;
 988     services__handle_exec_error(op, rc);
 989     crm_err("Unable to execute %s: %s", op->id, strerror(rc));
 990     exit_child(op, op->rc, "Child process was unable to execute file");
 991 }
 992 
 993 /*!
 994  * \internal
 995  * \brief Wait for synchronous action to complete, and set its result
 996  *
 997  * \param[in] op    Action to wait for
 998  * \param[in] data  Child signal data
 999  */
1000 static void
1001 wait_for_sync_result(svc_action_t *op, struct sigchld_data_s *data)
     /*  */
1002 {
1003     int status = 0;
1004     int timeout = op->timeout;
1005     time_t start = time(NULL);
1006     struct pollfd fds[3];
1007     int wait_rc = 0;
1008     const char *wait_reason = NULL;
1009 
1010     fds[0].fd = op->opaque->stdout_fd;
1011     fds[0].events = POLLIN;
1012     fds[0].revents = 0;
1013 
1014     fds[1].fd = op->opaque->stderr_fd;
1015     fds[1].events = POLLIN;
1016     fds[1].revents = 0;
1017 
1018     fds[2].fd = sigchld_open(data);
1019     fds[2].events = POLLIN;
1020     fds[2].revents = 0;
1021 
1022     crm_trace("Waiting for %s[%d]", op->id, op->pid);
1023     do {
1024         int poll_rc = poll(fds, 3, timeout);
1025 
1026         wait_reason = NULL;
1027 
1028         if (poll_rc > 0) {
1029             if (fds[0].revents & POLLIN) {
1030                 svc_read_output(op->opaque->stdout_fd, op, FALSE);
1031             }
1032 
1033             if (fds[1].revents & POLLIN) {
1034                 svc_read_output(op->opaque->stderr_fd, op, TRUE);
1035             }
1036 
1037             if ((fds[2].revents & POLLIN) && sigchld_received(fds[2].fd)) {
1038                 wait_rc = waitpid(op->pid, &status, WNOHANG);
1039 
1040                 if ((wait_rc > 0) || ((wait_rc < 0) && (errno == ECHILD))) {
1041                     // Child process exited or doesn't exist
1042                     break;
1043 
1044                 } else if (wait_rc < 0) {
1045                     wait_reason = pcmk_rc_str(errno);
1046                     crm_warn("Wait for completion of %s[%d] failed: %s "
1047                              CRM_XS " source=waitpid",
1048                              op->id, op->pid, wait_reason);
1049                     wait_rc = 0; // Act as if process is still running
1050                 }
1051             }
1052 
1053         } else if (poll_rc == 0) {
1054             // Poll timed out with no descriptors ready
1055             timeout = 0;
1056             break;
1057 
1058         } else if ((poll_rc < 0) && (errno != EINTR)) {
1059             wait_reason = pcmk_rc_str(errno);
1060             crm_err("Wait for completion of %s[%d] failed: %s "
1061                     CRM_XS " source=poll", op->id, op->pid, wait_reason);
1062             break;
1063         }
1064 
1065         timeout = op->timeout - (time(NULL) - start) * 1000;
1066 
1067     } while ((op->timeout < 0 || timeout > 0));
1068 
1069     crm_trace("Stopped waiting for %s[%d]", op->id, op->pid);
1070     finish_op_output(op, true);
1071     finish_op_output(op, false);
1072     close_op_input(op);
1073     sigchld_close(fds[2].fd);
1074 
1075     if (wait_rc <= 0) {
1076 
1077         if ((op->timeout > 0) && (timeout <= 0)) {
1078             services__set_result(op, services__generic_error(op),
1079                                  PCMK_EXEC_TIMEOUT,
1080                                  "Process did not exit within specified timeout");
1081             crm_warn("%s[%d] timed out after %dms",
1082                      op->id, op->pid, op->timeout);
1083 
1084         } else {
1085             services__set_result(op, services__generic_error(op),
1086                                  PCMK_EXEC_ERROR, wait_reason);
1087         }
1088 
1089         /* If only child hasn't been successfully waited for, yet.
1090            This is to limit killing wrong target a bit more. */
1091         if ((wait_rc == 0) && (waitpid(op->pid, &status, WNOHANG) == 0)) {
1092             if (kill(op->pid, SIGKILL)) {
1093                 crm_warn("Could not kill rogue child %s[%d]: %s",
1094                          op->id, op->pid, pcmk_strerror(errno));
1095             }
1096             /* Safe to skip WNOHANG here as we sent non-ignorable signal. */
1097             while ((waitpid(op->pid, &status, 0) == (pid_t) -1)
1098                    && (errno == EINTR)) {
1099                 /* keep waiting */;
1100             }
1101         }
1102 
1103     } else if (WIFEXITED(status)) {
1104         services__set_result(op, WEXITSTATUS(status), PCMK_EXEC_DONE, NULL);
1105         parse_exit_reason_from_stderr(op);
1106         crm_info("%s[%d] exited with status %d", op->id, op->pid, op->rc);
1107 
1108     } else if (WIFSIGNALED(status)) {
1109         int signo = WTERMSIG(status);
1110 
1111         services__set_result(op, services__generic_error(op), PCMK_EXEC_ERROR,
1112                              "Process interrupted by signal");
1113         crm_err("%s[%d] terminated with signal %d (%s)",
1114                 op->id, op->pid, signo, strsignal(signo));
1115 
1116 #ifdef WCOREDUMP
1117         if (WCOREDUMP(status)) {
1118             crm_warn("%s[%d] dumped core", op->id, op->pid);
1119         }
1120 #endif
1121 
1122     } else {
1123         // Shouldn't be possible to get here
1124         services__set_result(op, services__generic_error(op), PCMK_EXEC_ERROR,
1125                              "Unable to wait for child to complete");
1126     }
1127 }
1128 
1129 /*!
1130  * \internal
1131  * \brief Execute an action whose standard uses executable files
1132  *
1133  * \param[in] op  Action to execute
1134  *
1135  * \return Standard Pacemaker return value
1136  * \retval EBUSY          Recurring operation could not be initiated
1137  * \retval pcmk_rc_error  Synchronous action failed
1138  * \retval pcmk_rc_ok     Synchronous action succeeded, or asynchronous action
1139  *                        should not be freed (because it already was or is
1140  *                        pending)
1141  *
1142  * \note If the return value for an asynchronous action is not pcmk_rc_ok, the
1143  *       caller is responsible for freeing the action.
1144  */
1145 int
1146 services__execute_file(svc_action_t *op)
     /*  */
1147 {
1148     int stdout_fd[2];
1149     int stderr_fd[2];
1150     int stdin_fd[2] = {-1, -1};
1151     int rc;
1152     struct stat st;
1153     struct sigchld_data_s data;
1154 
1155     // Catch common failure conditions early
1156     if (stat(op->opaque->exec, &st) != 0) {
1157         rc = errno;
1158         crm_warn("Cannot execute '%s': %s " CRM_XS " stat rc=%d",
1159                  op->opaque->exec, pcmk_strerror(rc), rc);
1160         services__handle_exec_error(op, rc);
1161         goto done;
1162     }
1163 
1164     if (pipe(stdout_fd) < 0) {
1165         rc = errno;
1166         crm_err("Cannot execute '%s': %s " CRM_XS " pipe(stdout) rc=%d",
1167                 op->opaque->exec, pcmk_strerror(rc), rc);
1168         services__handle_exec_error(op, rc);
1169         goto done;
1170     }
1171 
1172     if (pipe(stderr_fd) < 0) {
1173         rc = errno;
1174 
1175         close_pipe(stdout_fd);
1176 
1177         crm_err("Cannot execute '%s': %s " CRM_XS " pipe(stderr) rc=%d",
1178                 op->opaque->exec, pcmk_strerror(rc), rc);
1179         services__handle_exec_error(op, rc);
1180         goto done;
1181     }
1182 
1183     if (pcmk_is_set(pcmk_get_ra_caps(op->standard), pcmk_ra_cap_stdin)) {
1184         if (pipe(stdin_fd) < 0) {
1185             rc = errno;
1186 
1187             close_pipe(stdout_fd);
1188             close_pipe(stderr_fd);
1189 
1190             crm_err("Cannot execute '%s': %s " CRM_XS " pipe(stdin) rc=%d",
1191                     op->opaque->exec, pcmk_strerror(rc), rc);
1192             services__handle_exec_error(op, rc);
1193             goto done;
1194         }
1195     }
1196 
1197     if (op->synchronous && !sigchld_setup(&data)) {
1198         close_pipe(stdin_fd);
1199         close_pipe(stdout_fd);
1200         close_pipe(stderr_fd);
1201         sigchld_cleanup(&data);
1202         services__set_result(op, services__generic_error(op), PCMK_EXEC_ERROR,
1203                              "Could not manage signals for child process");
1204         goto done;
1205     }
1206 
1207     op->pid = fork();
1208     switch (op->pid) {
1209         case -1:
1210             rc = errno;
1211             close_pipe(stdin_fd);
1212             close_pipe(stdout_fd);
1213             close_pipe(stderr_fd);
1214 
1215             crm_err("Cannot execute '%s': %s " CRM_XS " fork rc=%d",
1216                     op->opaque->exec, pcmk_strerror(rc), rc);
1217             services__handle_exec_error(op, rc);
1218             if (op->synchronous) {
1219                 sigchld_cleanup(&data);
1220             }
1221             goto done;
1222             break;
1223 
1224         case 0:                /* Child */
1225             close(stdout_fd[0]);
1226             close(stderr_fd[0]);
1227             if (stdin_fd[1] >= 0) {
1228                 close(stdin_fd[1]);
1229             }
1230             if (STDOUT_FILENO != stdout_fd[1]) {
1231                 if (dup2(stdout_fd[1], STDOUT_FILENO) != STDOUT_FILENO) {
1232                     crm_warn("Can't redirect output from '%s': %s "
1233                              CRM_XS " errno=%d",
1234                              op->opaque->exec, pcmk_strerror(errno), errno);
1235                 }
1236                 close(stdout_fd[1]);
1237             }
1238             if (STDERR_FILENO != stderr_fd[1]) {
1239                 if (dup2(stderr_fd[1], STDERR_FILENO) != STDERR_FILENO) {
1240                     crm_warn("Can't redirect error output from '%s': %s "
1241                              CRM_XS " errno=%d",
1242                              op->opaque->exec, pcmk_strerror(errno), errno);
1243                 }
1244                 close(stderr_fd[1]);
1245             }
1246             if ((stdin_fd[0] >= 0) &&
1247                 (STDIN_FILENO != stdin_fd[0])) {
1248                 if (dup2(stdin_fd[0], STDIN_FILENO) != STDIN_FILENO) {
1249                     crm_warn("Can't redirect input to '%s': %s "
1250                              CRM_XS " errno=%d",
1251                              op->opaque->exec, pcmk_strerror(errno), errno);
1252                 }
1253                 close(stdin_fd[0]);
1254             }
1255 
1256             if (op->synchronous) {
1257                 sigchld_cleanup(&data);
1258             }
1259 
1260             action_launch_child(op);
1261             CRM_ASSERT(0);  /* action_launch_child is effectively noreturn */
1262     }
1263 
1264     /* Only the parent reaches here */
1265     close(stdout_fd[1]);
1266     close(stderr_fd[1]);
1267     if (stdin_fd[0] >= 0) {
1268         close(stdin_fd[0]);
1269     }
1270 
1271     op->opaque->stdout_fd = stdout_fd[0];
1272     rc = pcmk__set_nonblocking(op->opaque->stdout_fd);
1273     if (rc != pcmk_rc_ok) {
1274         crm_warn("Could not set '%s' output non-blocking: %s "
1275                  CRM_XS " rc=%d",
1276                  op->opaque->exec, pcmk_rc_str(rc), rc);
1277     }
1278 
1279     op->opaque->stderr_fd = stderr_fd[0];
1280     rc = pcmk__set_nonblocking(op->opaque->stderr_fd);
1281     if (rc != pcmk_rc_ok) {
1282         crm_warn("Could not set '%s' error output non-blocking: %s "
1283                  CRM_XS " rc=%d",
1284                  op->opaque->exec, pcmk_rc_str(rc), rc);
1285     }
1286 
1287     op->opaque->stdin_fd = stdin_fd[1];
1288     if (op->opaque->stdin_fd >= 0) {
1289         // using buffer behind non-blocking-fd here - that could be improved
1290         // as long as no other standard uses stdin_fd assume stonith
1291         rc = pcmk__set_nonblocking(op->opaque->stdin_fd);
1292         if (rc != pcmk_rc_ok) {
1293             crm_warn("Could not set '%s' input non-blocking: %s "
1294                     CRM_XS " fd=%d,rc=%d", op->opaque->exec,
1295                     pcmk_rc_str(rc), op->opaque->stdin_fd, rc);
1296         }
1297         pipe_in_action_stdin_parameters(op);
1298         // as long as we are handling parameters directly in here just close
1299         close(op->opaque->stdin_fd);
1300         op->opaque->stdin_fd = -1;
1301     }
1302 
1303     // after fds are setup properly and before we plug anything into mainloop
1304     if (op->opaque->fork_callback) {
1305         op->opaque->fork_callback(op);
1306     }
1307 
1308     if (op->synchronous) {
1309         wait_for_sync_result(op, &data);
1310         sigchld_cleanup(&data);
1311         goto done;
1312     }
1313 
1314     crm_trace("Waiting async for '%s'[%d]", op->opaque->exec, op->pid);
1315     mainloop_child_add_with_flags(op->pid, op->timeout, op->id, op,
1316                                   pcmk_is_set(op->flags, SVC_ACTION_LEAVE_GROUP)? mainloop_leave_pid_group : 0,
1317                                   async_action_complete);
1318 
1319     op->opaque->stdout_gsource = mainloop_add_fd(op->id,
1320                                                  G_PRIORITY_LOW,
1321                                                  op->opaque->stdout_fd, op,
1322                                                  &stdout_callbacks);
1323     op->opaque->stderr_gsource = mainloop_add_fd(op->id,
1324                                                  G_PRIORITY_LOW,
1325                                                  op->opaque->stderr_fd, op,
1326                                                  &stderr_callbacks);
1327     services_add_inflight_op(op);
1328     return pcmk_rc_ok;
1329 
1330 done:
1331     if (op->synchronous) {
1332         return (op->rc == PCMK_OCF_OK)? pcmk_rc_ok : pcmk_rc_error;
1333     } else {
1334         return services__finalize_async_op(op);
1335     }
1336 }
1337 
1338 GList *
1339 services_os_get_single_directory_list(const char *root, gboolean files, gboolean executable)
     /*  */
1340 {
1341     GList *list = NULL;
1342     struct dirent **namelist;
1343     int entries = 0, lpc = 0;
1344     char buffer[PATH_MAX];
1345 
1346     entries = scandir(root, &namelist, NULL, alphasort);
1347     if (entries <= 0) {
1348         return list;
1349     }
1350 
1351     for (lpc = 0; lpc < entries; lpc++) {
1352         struct stat sb;
1353 
1354         if ('.' == namelist[lpc]->d_name[0]) {
1355             free(namelist[lpc]);
1356             continue;
1357         }
1358 
1359         snprintf(buffer, sizeof(buffer), "%s/%s", root, namelist[lpc]->d_name);
1360 
1361         if (stat(buffer, &sb)) {
1362             continue;
1363         }
1364 
1365         if (S_ISDIR(sb.st_mode)) {
1366             if (files) {
1367                 free(namelist[lpc]);
1368                 continue;
1369             }
1370 
1371         } else if (S_ISREG(sb.st_mode)) {
1372             if (files == FALSE) {
1373                 free(namelist[lpc]);
1374                 continue;
1375 
1376             } else if (executable
1377                        && (sb.st_mode & S_IXUSR) == 0
1378                        && (sb.st_mode & S_IXGRP) == 0 && (sb.st_mode & S_IXOTH) == 0) {
1379                 free(namelist[lpc]);
1380                 continue;
1381             }
1382         }
1383 
1384         list = g_list_append(list, strdup(namelist[lpc]->d_name));
1385 
1386         free(namelist[lpc]);
1387     }
1388 
1389     free(namelist);
1390     return list;
1391 }
1392 
1393 GList *
1394 services_os_get_directory_list(const char *root, gboolean files, gboolean executable)
     /*  */
1395 {
1396     GList *result = NULL;
1397     char *dirs = strdup(root);
1398     char *dir = NULL;
1399 
1400     if (pcmk__str_empty(dirs)) {
1401         free(dirs);
1402         return result;
1403     }
1404 
1405     for (dir = strtok(dirs, ":"); dir != NULL; dir = strtok(NULL, ":")) {
1406         GList *tmp = services_os_get_single_directory_list(dir, files, executable);
1407 
1408         if (tmp) {
1409             result = g_list_concat(result, tmp);
1410         }
1411     }
1412 
1413     free(dirs);
1414 
1415     return result;
1416 }
/* */
root/lib/services/services_linux.c

DEFINITIONS
