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Merge #10057: [init] Deduplicated sigaction() boilerplate

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81a3857 Deduplicated sigaction() boilerplate (Thomas Snider)

Tree-SHA512: 705b73f285a3d76504ba01476e072fdce67731b65f309bb04e4bbd765556c37e127cb769b475de2d68b33f50d7737fb136aefa0fa7c725a11ad16a47b9d0365f
This commit is contained in:
Wladimir J. van der Laan 2017-03-27 10:36:32 +02:00
commit 5114f81136
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1 changed files with 19 additions and 14 deletions
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33
src/init.cpp
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@ -265,18 +265,31 @@ void Shutdown()
} }
/** /**
* Signal handlers are very limited in what they are allowed to do, so: * Signal handlers are very limited in what they are allowed to do.
* The execution context the handler is invoked in is not guaranteed,
* so we restrict handler operations to just touching variables:
*/ */
void HandleSIGTERM(int) static void HandleSIGTERM(int)
{ {
fRequestShutdown = true; fRequestShutdown = true;
} }
void HandleSIGHUP(int) static void HandleSIGHUP(int)
{ {
fReopenDebugLog = true; fReopenDebugLog = true;
} }
#ifndef WIN32
static void registerSignalHandler(int signal, void(*handler)(int))
{
struct sigaction sa;
sa.sa_handler = handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(signal, &sa, NULL);
}
#endif
bool static Bind(CConnman& connman, const CService &addr, unsigned int flags) { bool static Bind(CConnman& connman, const CService &addr, unsigned int flags) {
if (!(flags & BF_EXPLICIT) && IsLimited(addr)) if (!(flags & BF_EXPLICIT) && IsLimited(addr))
return false; return false;
@ -848,19 +861,11 @@ bool AppInitBasicSetup()
} }
// Clean shutdown on SIGTERM // Clean shutdown on SIGTERM
struct sigaction sa; registerSignalHandler(SIGTERM, HandleSIGTERM);
sa.sa_handler = HandleSIGTERM; registerSignalHandler(SIGINT, HandleSIGTERM);
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
// Reopen debug.log on SIGHUP // Reopen debug.log on SIGHUP
struct sigaction sa_hup; registerSignalHandler(SIGHUP, HandleSIGHUP);
sa_hup.sa_handler = HandleSIGHUP;
sigemptyset(&sa_hup.sa_mask);
sa_hup.sa_flags = 0;
sigaction(SIGHUP, &sa_hup, NULL);
// Ignore SIGPIPE, otherwise it will bring the daemon down if the client closes unexpectedly // Ignore SIGPIPE, otherwise it will bring the daemon down if the client closes unexpectedly
signal(SIGPIPE, SIG_IGN); signal(SIGPIPE, SIG_IGN);