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Resolver: Implement signal handler and catch TERM signal

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This commit is contained in:
Alexander Barton 2010-05-21 23:53:48 +02:00
parent d4632a727f
commit 2d4ea28835
1 changed files with 30 additions and 2 deletions
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32
src/ngircd/resolve.c
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@ -42,6 +42,7 @@
#include "io.h" #include "io.h"
static void Init_Subprocess PARAMS(( void ));
static void Do_ResolveAddr PARAMS(( const ng_ipaddr_t *Addr, int Sock, int w_fd )); static void Do_ResolveAddr PARAMS(( const ng_ipaddr_t *Addr, int Sock, int w_fd ));
static void Do_ResolveName PARAMS(( const char *Host, int w_fd )); static void Do_ResolveName PARAMS(( const char *Host, int w_fd ));
@ -69,7 +70,7 @@ Resolve_Addr(PROC_STAT * s, const ng_ipaddr_t *Addr, int identsock,
return true; return true;
} else if( pid == 0 ) { } else if( pid == 0 ) {
/* Sub process */ /* Sub process */
Log_Init_Resolver(); Init_Subprocess();
Do_ResolveAddr( Addr, identsock, pipefd[1]); Do_ResolveAddr( Addr, identsock, pipefd[1]);
Log_Exit_Resolver( ); Log_Exit_Resolver( );
exit(0); exit(0);
@ -98,7 +99,7 @@ Resolve_Name( PROC_STAT *s, const char *Host, void (*cbfunc)(int, short))
return true; return true;
} else if( pid == 0 ) { } else if( pid == 0 ) {
/* Sub process */ /* Sub process */
Log_Init_Resolver(); Init_Subprocess();
Do_ResolveName(Host, pipefd[1]); Do_ResolveName(Host, pipefd[1]);
Log_Exit_Resolver( ); Log_Exit_Resolver( );
exit(0); exit(0);
@ -107,6 +108,33 @@ Resolve_Name( PROC_STAT *s, const char *Host, void (*cbfunc)(int, short))
} /* Resolve_Name */ } /* Resolve_Name */
/**
* Signal handler for the forked resolver subprocess.
*/
static void
Signal_Handler(int Signal)
{
switch(Signal) {
case SIGTERM:
#ifdef DEBUG
Log_Resolver(LOG_DEBUG, "Resolver: Got TERM signal, exiting.");
#endif
exit(1);
}
}
/**
* Initialize forked resolver subprocess.
*/
static void
Init_Subprocess(void)
{
signal(SIGTERM, Signal_Handler);
Log_Init_Resolver();
}
#if !defined(HAVE_GETADDRINFO) || !defined(HAVE_GETNAMEINFO) #if !defined(HAVE_GETADDRINFO) || !defined(HAVE_GETNAMEINFO)
#if !defined(WANT_IPV6) && defined(h_errno) #if !defined(WANT_IPV6) && defined(h_errno)
static char * static char *