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cmdtalk: avoid talking to dead process. Avoid restarting command which failed to start

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This commit is contained in:
Jean-Francois Dockes 2020-05-30 15:57:08 +02:00
parent d223d4e350
commit 5e488fac8a
1 changed files with 32 additions and 6 deletions
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38
src/utils/cmdtalk.cpp
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@ -66,8 +66,10 @@ public:
bool talk(const pair<string, string>& arg0,
const unordered_map<string, string>& args,
unordered_map<string, string>& rep);
bool running();
ExecCmd *cmd{0};
bool failed{false};
Canceler m_cancel;
std::mutex mmutex;
};
@ -87,7 +89,10 @@ bool CmdTalk::startCmd(const string& cmdname,
const vector<string>& path)
{
LOGDEB("CmdTalk::startCmd\n");
if (m->failed) {
LOGINF("CmdTalk: command failed, not restarting\n");
return false;
}
delete m->cmd;
m->cmd = new ExecCmd;
m->cmd->setAdvise(&m->m_cancel);
@ -173,12 +178,29 @@ bool CmdTalk::Internal::readDataElement(string& name, string &data)
return true;
}
bool CmdTalk::Internal::running()
{
if (failed || nullptr == cmd || cmd->getChildPid() <= 0) {
return false;
}
int status;
if (cmd->maybereap(&status)) {
// Command exited. Set error status so that a restart will fail.
LOGERR("CmdTalk::talk: command exited\n");
failed = true;
return false;
}
return true;
}
bool CmdTalk::Internal::talk(const pair<string, string>& arg0,
const unordered_map<string, string>& args,
unordered_map<string, string>& rep)
{
std::unique_lock<std::mutex> lock(mmutex);
if (cmd->getChildPid() <= 0) {
if (!running()) {
LOGERR("CmdTalk::talk: no process\n");
return false;
}
@ -223,12 +245,16 @@ bool CmdTalk::Internal::talk(const pair<string, string>& arg0,
bool CmdTalk::running()
{
return m && m->cmd && m->cmd->getChildPid() > 0;
if (nullptr == m)
return false;
return m->running();
}
bool CmdTalk::talk(const unordered_map<string, string>& args,
unordered_map<string, string>& rep)
{
if (nullptr == m)
return false;
return m->talk({"",""}, args, rep);
}
@ -237,7 +263,7 @@ bool CmdTalk::callproc(
const unordered_map<std::string, std::string>& args,
unordered_map<std::string, std::string>& rep)
{
if (nullptr == m)
return false;
return m->talk({"cmdtalk:proc", proc}, args, rep);
}