b661f160ba
any arbitrary command as a notifier, potentially allowing just about anything to be a notifier. This component forks a child during orte_init() to avoid forking problems with some OS-bypass networks. The following MCA parameters are available: notifier_command_cmd: Default: /sbin/initlog -f $s -n "Open MPI" -s "$S: $m (errorcode: $e)" Command to execute, with substitution. $s = integer severity; $S = string severity; $e = integer error code; $m = string message notifier_command_timeout: Default: 30 Timeout (in seconds) of the command This commit was SVN r21076.
241 строка
7.8 KiB
C
241 строка
7.8 KiB
C
/* -*- C -*-
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*
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* Copyright (c) 2004-2008 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/*
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* Simple command notifier
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*/
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#include "orte_config.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "opal/mca/base/mca_base_param.h"
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#include "opal/util/argv.h"
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#include "orte/constants.h"
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#include "orte/runtime/orte_globals.h"
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#include "orte/util/show_help.h"
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#include "notifier_command.h"
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static int command_open(void);
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static int command_component_query(mca_base_module_t **module, int *priority);
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static int command_close(void);
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static int command_register(void);
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/*
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* Struct of function pointers that need to be initialized
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*/
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orte_notifier_command_component_t mca_notifier_command_component = {
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{
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{
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ORTE_NOTIFIER_BASE_VERSION_1_0_0,
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"command",
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ORTE_MAJOR_VERSION,
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ORTE_MINOR_VERSION,
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ORTE_RELEASE_VERSION,
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command_open,
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command_close,
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command_component_query,
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command_register,
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},
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{
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/* The component is checkpoint ready */
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MCA_BASE_METADATA_PARAM_CHECKPOINT
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}
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},
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/* Command command to run */
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"/sbin/initlog -f $s -n \"Open MPI\" -s \"$S: $m (errorcode: $e)\"",
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/* Timeout */
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30,
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/* Priority */
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10,
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/* PID of child */
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-1,
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/* To-child pipe FDs */
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{ -1, -1 },
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/* To-parent pipe FDs */
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{ -1, -1 },
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};
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/* Safety to ensure we don't try to write down a dead pipe */
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static void child_death_cb(pid_t pid, int status, void *data)
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{
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if (pid == mca_notifier_command_component.child_pid) {
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OPAL_OUTPUT((0, "Command notifier: child unexpectedly died! Exited, %d, exitstatus %d", WIFEXITED(status), WEXITSTATUS(status)));
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mca_notifier_command_component.child_pid = 0;
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mca_notifier_command_component.to_child[1] = -1;
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}
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}
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static int command_register(void)
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{
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mca_base_param_reg_string(&mca_notifier_command_component.super.base_version,
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"cmd",
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"Command to execute, with substitution. $s = integer severity; $S = string severity; $e = integer error code; $m = string message",
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false, false,
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mca_notifier_command_component.cmd,
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&mca_notifier_command_component.cmd);
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mca_base_param_reg_int(&mca_notifier_command_component.super.base_version,
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"timeout",
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"Timeout (in seconds) of the command",
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false, false,
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mca_notifier_command_component.timeout,
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&mca_notifier_command_component.timeout);
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/* Priority */
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mca_base_param_reg_int(&mca_notifier_command_component.super.base_version,
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"priority",
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"Priority of this component",
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false, false,
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mca_notifier_command_component.priority,
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&mca_notifier_command_component.priority);
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return ORTE_SUCCESS;
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}
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static int command_open(void)
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{
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/* Nothing to do */
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return ORTE_SUCCESS;
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}
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static int command_close(void)
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{
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if (NULL != mca_notifier_command_component.cmd) {
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free(mca_notifier_command_component.cmd);
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}
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/* Tell the child process to die */
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if (0 != mca_notifier_command_component.child_pid &&
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-1 != mca_notifier_command_component.to_child[1]) {
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orte_notifier_command_pipe_cmd_t cmd = CMD_TIME_TO_QUIT;
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orte_notifier_command_write_fd(mca_notifier_command_component.to_child[1],
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sizeof(cmd), &cmd);
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close(mca_notifier_command_component.to_child[1]);
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mca_notifier_command_component.to_child[1] = -1;
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close(mca_notifier_command_component.to_parent[0]);
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mca_notifier_command_component.to_parent[0] = -1;
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}
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return ORTE_SUCCESS;
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}
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static int command_component_query(mca_base_module_t **module, int *priority)
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{
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char **argv = NULL;
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*priority = 0;
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*module = NULL;
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/* If there's no command, there's no love */
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if (NULL == mca_notifier_command_component.cmd ||
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'\0' == mca_notifier_command_component.cmd[0]) {
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orte_show_help("help-orte-notifier-command.txt",
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"command not specified", true);
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return ORTE_ERR_NOT_FOUND;
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}
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/* Attempt to parse the command into argv, just as a basic sanity
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check to ensure that it seems to be ok. */
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if (ORTE_SUCCESS !=
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orte_notifier_command_split(mca_notifier_command_component.cmd, &argv)) {
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orte_show_help("help-orte-notifier-command.txt",
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"bad command", true, orte_process_info.nodename,
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mca_notifier_command_component.cmd);
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return ORTE_ERR_BAD_PARAM;
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}
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opal_argv_free(argv);
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/* Create the pipe to be used (it'll be closed in component
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close if we're not selected) */
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if (0 != pipe(mca_notifier_command_component.to_child) ||
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0 != pipe(mca_notifier_command_component.to_parent)) {
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int save = errno;
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orte_show_help("help-orte-notifier-command.txt",
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"system call fail", true, orte_process_info.nodename,
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"pipe", save, strerror(save));
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errno = save;
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return ORTE_ERR_IN_ERRNO;
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}
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/* Create the child (it'll be shut down in component close if
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we're not selected). We create the child very early so that we
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do it before any MPI networks are initialized that have
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problems with fork(). The child sits on the other end of a
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pipe and waits for commands from this main process. Commands
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include telling the child to fork/exec a proces and shutting
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down. */
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mca_notifier_command_component.child_pid = fork();
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if (mca_notifier_command_component.child_pid < 0) {
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int save = errno;
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orte_show_help("help-orte-notifier-command.txt",
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"system call fail", true, orte_process_info.nodename,
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"fork", save, strerror(save));
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errno = save;
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return ORTE_ERR_IN_ERRNO;
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}
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/* Child: close all fd's except the reading pipe and call the
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child main routine */
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if (0 == mca_notifier_command_component.child_pid) {
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int i;
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int fdmax = sysconf(_SC_OPEN_MAX);
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for (i = 3; i < fdmax; ++i) {
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if (i != mca_notifier_command_component.to_child[0] &&
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i != mca_notifier_command_component.to_parent[1]) {
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close(i);
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}
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}
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orte_notifier_command_child_main();
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/* Never returns */
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}
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/* Parent: close other ends of pipes */
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close(mca_notifier_command_component.to_child[0]);
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close(mca_notifier_command_component.to_parent[1]);
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/* Let's find out if the child unexpectedly dies */
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orte_wait_cb(mca_notifier_command_component.child_pid, child_death_cb, 0);
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*priority = 10;
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*module = (mca_base_module_t *) &orte_notifier_command_module;
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return ORTE_SUCCESS;
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}
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