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/*
* Copyright (c) 2012-2013 Red Hat.
* Copyright (c) 1995-2005 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pmcd.h"
#if defined(HAVE_DLFCN_H)
#include <dlfcn.h>
#elif defined(HAVE_DL_H)
#include <dl.h>
#endif
#if defined(HAVE_SYS_WAIT_H)
#include <sys/wait.h>
#endif
#if defined(HAVE_SYS_RESOURCE_H)
#include <sys/resource.h>
#endif
/* Return a pointer to the agent that is reposible for a given domain.
* Note that the agent may not be in a connected state!
*/
AgentInfo *
FindDomainAgent(int domain)
{
int i;
for (i = 0; i < nAgents; i++)
if (agent[i].pmDomainId == domain)
return &agent[i];
return NULL;
}
void
CleanupAgent(AgentInfo* aPtr, int why, int status)
{
extern int AgentDied;
#ifndef IS_MINGW
int exit_status = status;
#endif
int reason = 0;
if (aPtr->ipcType == AGENT_DSO) {
if (aPtr->ipc.dso.dlHandle != NULL) {
#ifdef HAVE_DLOPEN
dlclose(aPtr->ipc.dso.dlHandle);
#endif
}
pmcd_trace(TR_DEL_AGENT, aPtr->pmDomainId, -1, -1);
}
else {
pmcd_trace(TR_DEL_AGENT, aPtr->pmDomainId, aPtr->inFd, aPtr->outFd);
if (aPtr->inFd != -1) {
if (aPtr->ipcType == AGENT_SOCKET)
__pmCloseSocket(aPtr->inFd);
else {
close(aPtr->inFd);
__pmResetIPC(aPtr->inFd);
}
aPtr->inFd = -1;
}
if (aPtr->outFd != -1) {
if (aPtr->ipcType == AGENT_SOCKET)
__pmCloseSocket(aPtr->outFd);
else {
close(aPtr->outFd);
__pmResetIPC(aPtr->outFd);
}
aPtr->outFd = -1;
}
if (aPtr->ipcType == AGENT_SOCKET &&
aPtr->ipc.socket.addrDomain == AF_UNIX) {
/* remove the Unix domain socket */
unlink(aPtr->ipc.socket.name);
}
}
__pmNotifyErr(LOG_INFO, "CleanupAgent ...\n");
fprintf(stderr, "Cleanup \"%s\" agent (dom %d):", aPtr->pmDomainLabel, aPtr->pmDomainId);
if (why == AT_EXIT) {
/* waitpid has already been done */
fprintf(stderr, " terminated");
reason = (status << 8) | REASON_EXIT;
}
else {
if (why == AT_CONFIG) {
fprintf(stderr, " unconfigured");
} else {
reason = REASON_PROTOCOL;
fprintf(stderr, " protocol failure for fd=%d", status);
#ifndef IS_MINGW
exit_status = -1;
#endif
}
if (aPtr->status.isChild == 1) {
pid_t pid = (pid_t)-1;
pid_t done;
int wait_status;
int slept = 0;
if (aPtr->ipcType == AGENT_PIPE)
pid = aPtr->ipc.pipe.agentPid;
else if (aPtr->ipcType == AGENT_SOCKET)
pid = aPtr->ipc.socket.agentPid;
for ( ; ; ) {
#if defined(HAVE_WAIT3)
done = wait3(&wait_status, WNOHANG, NULL);
#elif defined(HAVE_WAITPID)
done = waitpid((pid_t)-1, &wait_status, WNOHANG);
#else
wait_status = 0;
done = 0;
#endif
if (done == pid) {
#ifndef IS_MINGW
exit_status = wait_status;
#endif
break;
}
if (done > 0) {
continue;
}
if (slept) {
break;
}
/* give PMDA a chance to notice the close() and exit */
sleep(1);
slept = 1;
}
}
}
#ifndef IS_MINGW
if (exit_status != -1) {
if (WIFEXITED(exit_status)) {
fprintf(stderr, ", exit(%d)", WEXITSTATUS(exit_status));
reason = (WEXITSTATUS(exit_status) << 8) | reason;
}
else if (WIFSIGNALED(exit_status)) {
fprintf(stderr, ", signal(%d)", WTERMSIG(exit_status));
#ifdef WCOREDUMP
if (WCOREDUMP(exit_status))
fprintf(stderr, ", dumped core");
#endif
reason = (WTERMSIG(exit_status) << 16) | reason;
}
}
#endif
fputc('\n', stderr);
aPtr->reason = reason;
aPtr->status.connected = 0;
aPtr->status.busy = 0;
aPtr->status.notReady = 0;
aPtr->status.flags = 0;
AgentDied = 1;
if (_pmcd_trace_mask)
pmcd_dump_trace(stderr);
MarkStateChanges(PMCD_DROP_AGENT);
}
/* Wait up to total secs for agents to terminate.
* Return 0 if all terminate, else -1
*/
int
HarvestAgents(unsigned int total)
{
int i;
int sts;
int found;
pid_t pid;
AgentInfo *ap;
/*
* Check for child process termination. Be careful, and ignore any
* non-agent processes found.
*/
do {
#if defined(HAVE_WAIT3)
pid = wait3(&sts, WNOHANG, NULL);
#elif defined(HAVE_WAITPID)
pid = waitpid((pid_t)-1, &sts, WNOHANG);
#else
break;
#endif
found = 0;
for ( i = 0; i < nAgents; i++) {
ap = &agent[i];
if (!ap->status.connected || ap->ipcType == AGENT_DSO)
continue;
found = 1;
if (pid <= (pid_t)0) {
if (total--) {
sleep(1);
break;
} else {
return -1;
}
}
if (pid == ((ap->ipcType == AGENT_SOCKET)
? ap->ipc.socket.agentPid
: ap->ipc.pipe.agentPid)) {
CleanupAgent(ap, AT_EXIT, sts);
break;
}
}
} while (found);
return 0;
}
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