tests/server: move all signal handling routines to util.[ch]

Avoid code duplication to prepare for portability enhancements.

7 files changed, 158 insertions, 647 deletions

diff --git a/tests/server/rtspd.c b/tests/server/rtspd.c
index 7563fd22a..d3f0fe2f5 100644
--- a/tests/server/rtspd.c
+++ b/tests/server/rtspd.c
@@ -201,138 +201,6 @@ static const char *doc404_RTSP = "RTSP/1.0 404 Not Found\r\n"
 #define RTP_DATA_SIZE 12
 static const char *RTP_DATA = "$_1234\n\0asdf";
 
-/* do-nothing macro replacement for systems which lack siginterrupt() */
-
-#ifndef HAVE_SIGINTERRUPT
-#define siginterrupt(x,y) do {} while(0)
-#endif
-
-/* vars used to keep around previous signal handlers */
-
-typedef RETSIGTYPE (*SIGHANDLER_T)(int);
-
-#ifdef SIGHUP
-static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGPIPE
-static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
-#endif
-
-#ifdef SIGALRM
-static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
-#endif
-
-#ifdef SIGINT
-static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGTERM
-static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
-#endif
-
-#if defined(SIGBREAK) && defined(WIN32)
-static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
-#endif
-
-/* var which if set indicates that the program should finish execution */
-
-SIG_ATOMIC_T got_exit_signal = 0;
-
-/* if next is set indicates the first signal handled in exit_signal_handler */
-
-static volatile int exit_signal = 0;
-
-/* signal handler that will be triggered to indicate that the program
-  should finish its execution in a controlled manner as soon as possible.
-  The first time this is called it will set got_exit_signal to one and
-  store in exit_signal the signal that triggered its execution. */
-
-static RETSIGTYPE exit_signal_handler(int signum)
-{
-  int old_errno = errno;
-  if(got_exit_signal == 0) {
-    got_exit_signal = 1;
-    exit_signal = signum;
-  }
-  (void)signal(signum, exit_signal_handler);
-  errno = old_errno;
-}
-
-static void install_signal_handlers(void)
-{
-#ifdef SIGHUP
-  /* ignore SIGHUP signal */
-  old_sighup_handler = signal(SIGHUP, SIG_IGN);
-  if(old_sighup_handler == SIG_ERR)
-    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
-#endif
-#ifdef SIGPIPE
-  /* ignore SIGPIPE signal */
-  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
-  if(old_sigpipe_handler == SIG_ERR)
-    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
-#endif
-#ifdef SIGALRM
-  /* ignore SIGALRM signal */
-  old_sigalrm_handler = signal(SIGALRM, SIG_IGN);
-  if(old_sigalrm_handler == SIG_ERR)
-    logmsg("cannot install SIGALRM handler: %s", strerror(errno));
-#endif
-#ifdef SIGINT
-  /* handle SIGINT signal with our exit_signal_handler */
-  old_sigint_handler = signal(SIGINT, exit_signal_handler);
-  if(old_sigint_handler == SIG_ERR)
-    logmsg("cannot install SIGINT handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGINT, 1);
-#endif
-#ifdef SIGTERM
-  /* handle SIGTERM signal with our exit_signal_handler */
-  old_sigterm_handler = signal(SIGTERM, exit_signal_handler);
-  if(old_sigterm_handler == SIG_ERR)
-    logmsg("cannot install SIGTERM handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGTERM, 1);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  /* handle SIGBREAK signal with our exit_signal_handler */
-  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
-  if(old_sigbreak_handler == SIG_ERR)
-    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGBREAK, 1);
-#endif
-}
-
-static void restore_signal_handlers(void)
-{
-#ifdef SIGHUP
-  if(SIG_ERR != old_sighup_handler)
-    (void)signal(SIGHUP, old_sighup_handler);
-#endif
-#ifdef SIGPIPE
-  if(SIG_ERR != old_sigpipe_handler)
-    (void)signal(SIGPIPE, old_sigpipe_handler);
-#endif
-#ifdef SIGALRM
-  if(SIG_ERR != old_sigalrm_handler)
-    (void)signal(SIGALRM, old_sigalrm_handler);
-#endif
-#ifdef SIGINT
-  if(SIG_ERR != old_sigint_handler)
-    (void)signal(SIGINT, old_sigint_handler);
-#endif
-#ifdef SIGTERM
-  if(SIG_ERR != old_sigterm_handler)
-    (void)signal(SIGTERM, old_sigterm_handler);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  if(SIG_ERR != old_sigbreak_handler)
-    (void)signal(SIGBREAK, old_sigbreak_handler);
-#endif
-}
-
 static int ProcessRequest(struct httprequest *req)
 {
   char *line = &req->reqbuf[req->checkindex];
@@ -1275,7 +1143,7 @@ int main(int argc, char *argv[])
   atexit(win32_cleanup);
 #endif
 
-  install_signal_handlers();
+  install_signal_handlers(false);
 
   pid = (long)getpid();
 
@@ -1465,7 +1333,7 @@ server_cleanup:
     clear_advisor_read_lock(SERVERLOGS_LOCK);
   }
 
-  restore_signal_handlers();
+  restore_signal_handlers(false);
 
   if(got_exit_signal) {
     logmsg("========> %s rtspd (port: %d pid: %ld) exits with signal (%d)",
diff --git a/tests/server/sockfilt.c b/tests/server/sockfilt.c
index 83ba08a98..166b75b38 100644
--- a/tests/server/sockfilt.c
+++ b/tests/server/sockfilt.c
@@ -147,138 +147,6 @@ enum sockmode {
   ACTIVE_DISCONNECT  /* as a client, disconnected from server */
 };
 
-/* do-nothing macro replacement for systems which lack siginterrupt() */
-
-#ifndef HAVE_SIGINTERRUPT
-#define siginterrupt(x,y) do {} while(0)
-#endif
-
-/* vars used to keep around previous signal handlers */
-
-typedef RETSIGTYPE (*SIGHANDLER_T)(int);
-
-#ifdef SIGHUP
-static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGPIPE
-static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
-#endif
-
-#ifdef SIGALRM
-static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
-#endif
-
-#ifdef SIGINT
-static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGTERM
-static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
-#endif
-
-#if defined(SIGBREAK) && defined(WIN32)
-static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
-#endif
-
-/* var which if set indicates that the program should finish execution */
-
-SIG_ATOMIC_T got_exit_signal = 0;
-
-/* if next is set indicates the first signal handled in exit_signal_handler */
-
-static volatile int exit_signal = 0;
-
-/* signal handler that will be triggered to indicate that the program
-  should finish its execution in a controlled manner as soon as possible.
-  The first time this is called it will set got_exit_signal to one and
-  store in exit_signal the signal that triggered its execution. */
-
-static RETSIGTYPE exit_signal_handler(int signum)
-{
-  int old_errno = errno;
-  if(got_exit_signal == 0) {
-    got_exit_signal = 1;
-    exit_signal = signum;
-  }
-  (void)signal(signum, exit_signal_handler);
-  errno = old_errno;
-}
-
-static void install_signal_handlers(void)
-{
-#ifdef SIGHUP
-  /* ignore SIGHUP signal */
-  old_sighup_handler = signal(SIGHUP, SIG_IGN);
-  if(old_sighup_handler == SIG_ERR)
-    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
-#endif
-#ifdef SIGPIPE
-  /* ignore SIGPIPE signal */
-  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
-  if(old_sigpipe_handler == SIG_ERR)
-    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
-#endif
-#ifdef SIGALRM
-  /* ignore SIGALRM signal */
-  old_sigalrm_handler = signal(SIGALRM, SIG_IGN);
-  if(old_sigalrm_handler == SIG_ERR)
-    logmsg("cannot install SIGALRM handler: %s", strerror(errno));
-#endif
-#ifdef SIGINT
-  /* handle SIGINT signal with our exit_signal_handler */
-  old_sigint_handler = signal(SIGINT, exit_signal_handler);
-  if(old_sigint_handler == SIG_ERR)
-    logmsg("cannot install SIGINT handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGINT, 1);
-#endif
-#ifdef SIGTERM
-  /* handle SIGTERM signal with our exit_signal_handler */
-  old_sigterm_handler = signal(SIGTERM, exit_signal_handler);
-  if(old_sigterm_handler == SIG_ERR)
-    logmsg("cannot install SIGTERM handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGTERM, 1);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  /* handle SIGBREAK signal with our exit_signal_handler */
-  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
-  if(old_sigbreak_handler == SIG_ERR)
-    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGBREAK, 1);
-#endif
-}
-
-static void restore_signal_handlers(void)
-{
-#ifdef SIGHUP
-  if(SIG_ERR != old_sighup_handler)
-    (void)signal(SIGHUP, old_sighup_handler);
-#endif
-#ifdef SIGPIPE
-  if(SIG_ERR != old_sigpipe_handler)
-    (void)signal(SIGPIPE, old_sigpipe_handler);
-#endif
-#ifdef SIGALRM
-  if(SIG_ERR != old_sigalrm_handler)
-    (void)signal(SIGALRM, old_sigalrm_handler);
-#endif
-#ifdef SIGINT
-  if(SIG_ERR != old_sigint_handler)
-    (void)signal(SIGINT, old_sigint_handler);
-#endif
-#ifdef SIGTERM
-  if(SIG_ERR != old_sigterm_handler)
-    (void)signal(SIGTERM, old_sigterm_handler);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  if(SIG_ERR != old_sigbreak_handler)
-    (void)signal(SIGBREAK, old_sigbreak_handler);
-#endif
-}
-
 #ifdef WIN32
 /*
  * read-wrapper to support reading from stdin on Windows.
@@ -1550,7 +1418,7 @@ int main(int argc, char *argv[])
   setmode(fileno(stderr), O_BINARY);
 #endif
 
-  install_signal_handlers();
+  install_signal_handlers(false);
 
 #ifdef ENABLE_IPV6
   if(!use_ipv6)
@@ -1647,7 +1515,7 @@ sockfilt_cleanup:
   if(wrotepidfile)
     unlink(pidname);
 
-  restore_signal_handlers();
+  restore_signal_handlers(false);
 
   if(got_exit_signal) {
     logmsg("============> sockfilt exits with signal (%d)", exit_signal);
diff --git a/tests/server/socksd.c b/tests/server/socksd.c
index 5e32bc904..390ccaab0 100644
--- a/tests/server/socksd.c
+++ b/tests/server/socksd.c
@@ -230,123 +230,6 @@ static void getconfig(void)
   }
 }
 
-
-/* do-nothing macro replacement for systems which lack siginterrupt() */
-
-#ifndef HAVE_SIGINTERRUPT
-#define siginterrupt(x,y) do {} while(0)
-#endif
-
-/* vars used to keep around previous signal handlers */
-
-typedef RETSIGTYPE (*SIGHANDLER_T)(int);
-
-#ifdef SIGHUP
-static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGPIPE
-static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
-#endif
-
-#ifdef SIGALRM
-static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
-#endif
-
-#ifdef SIGINT
-static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
-#endif
-
-#if defined(SIGBREAK) && defined(WIN32)
-static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
-#endif
-
-/* var which if set indicates that the program should finish execution */
-
-SIG_ATOMIC_T got_exit_signal = 0;
-
-/* if next is set indicates the first signal handled in exit_signal_handler */
-
-static volatile int exit_signal = 0;
-
-/* signal handler that will be triggered to indicate that the program
-  should finish its execution in a controlled manner as soon as possible.
-  The first time this is called it will set got_exit_signal to one and
-  store in exit_signal the signal that triggered its execution. */
-
-static RETSIGTYPE exit_signal_handler(int signum)
-{
-  int old_errno = errno;
-  if(got_exit_signal == 0) {
-    got_exit_signal = 1;
-    exit_signal = signum;
-  }
-  (void)signal(signum, exit_signal_handler);
-  errno = old_errno;
-}
-
-static void install_signal_handlers(void)
-{
-#ifdef SIGHUP
-  /* ignore SIGHUP signal */
-  old_sighup_handler = signal(SIGHUP, SIG_IGN);
-  if(old_sighup_handler == SIG_ERR)
-    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
-#endif
-#ifdef SIGPIPE
-  /* ignore SIGPIPE signal */
-  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
-  if(old_sigpipe_handler == SIG_ERR)
-    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
-#endif
-#ifdef SIGALRM
-  /* ignore SIGALRM signal */
-  old_sigalrm_handler = signal(SIGALRM, SIG_IGN);
-  if(old_sigalrm_handler == SIG_ERR)
-    logmsg("cannot install SIGALRM handler: %s", strerror(errno));
-#endif
-#ifdef SIGINT
-  /* handle SIGINT signal with our exit_signal_handler */
-  old_sigint_handler = signal(SIGINT, exit_signal_handler);
-  if(old_sigint_handler == SIG_ERR)
-    logmsg("cannot install SIGINT handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGINT, 1);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  /* handle SIGBREAK signal with our exit_signal_handler */
-  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
-  if(old_sigbreak_handler == SIG_ERR)
-    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGBREAK, 1);
-#endif
-}
-
-static void restore_signal_handlers(void)
-{
-#ifdef SIGHUP
-  if(SIG_ERR != old_sighup_handler)
-    (void)signal(SIGHUP, old_sighup_handler);
-#endif
-#ifdef SIGPIPE
-  if(SIG_ERR != old_sigpipe_handler)
-    (void)signal(SIGPIPE, old_sigpipe_handler);
-#endif
-#ifdef SIGALRM
-  if(SIG_ERR != old_sigalrm_handler)
-    (void)signal(SIGALRM, old_sigalrm_handler);
-#endif
-#ifdef SIGINT
-  if(SIG_ERR != old_sigint_handler)
-    (void)signal(SIGINT, old_sigint_handler);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  if(SIG_ERR != old_sigbreak_handler)
-    (void)signal(SIGBREAK, old_sigbreak_handler);
-#endif
-}
-
 static void loghex(unsigned char *buffer, ssize_t len)
 {
   char data[1200];
@@ -1095,7 +978,7 @@ int main(int argc, char *argv[])
   setmode(fileno(stderr), O_BINARY);
 #endif
 
-  install_signal_handlers();
+  install_signal_handlers(false);
 
 #ifdef ENABLE_IPV6
   if(!use_ipv6)
@@ -1145,7 +1028,7 @@ socks5_cleanup:
   if(wrotepidfile)
     unlink(pidname);
 
-  restore_signal_handlers();
+  restore_signal_handlers(false);
 
   if(got_exit_signal) {
     logmsg("============> socksd exits with signal (%d)", exit_signal);
diff --git a/tests/server/sws.c b/tests/server/sws.c
index b397ed19b..427bd6e8d 100644
--- a/tests/server/sws.c
+++ b/tests/server/sws.c
@@ -213,141 +213,9 @@ static const char *doc404 = "HTTP/1.1 404 Not Found\r\n"
     "The requested URL was not found on this server.\n"
     "<P><HR><ADDRESS>" SWSVERSION "</ADDRESS>\n" "</BODY></HTML>\n";
 
-/* do-nothing macro replacement for systems which lack siginterrupt() */
-
-#ifndef HAVE_SIGINTERRUPT
-#define siginterrupt(x,y) do {} while(0)
-#endif
-
-/* vars used to keep around previous signal handlers */
-
-typedef RETSIGTYPE (*SIGHANDLER_T)(int);
-
-#ifdef SIGHUP
-static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGPIPE
-static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
-#endif
-
-#ifdef SIGALRM
-static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
-#endif
-
-#ifdef SIGINT
-static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGTERM
-static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
-#endif
-
-#if defined(SIGBREAK) && defined(WIN32)
-static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
-#endif
-
-/* var which if set indicates that the program should finish execution */
-
-SIG_ATOMIC_T got_exit_signal = 0;
-
-/* if next is set indicates the first signal handled in exit_signal_handler */
-
-static volatile int exit_signal = 0;
-
 /* work around for handling trailing headers */
 static int already_recv_zeroed_chunk = FALSE;
 
-/* signal handler that will be triggered to indicate that the program
-  should finish its execution in a controlled manner as soon as possible.
-  The first time this is called it will set got_exit_signal to one and
-  store in exit_signal the signal that triggered its execution. */
-
-static RETSIGTYPE exit_signal_handler(int signum)
-{
-  int old_errno = errno;
-  if(got_exit_signal == 0) {
-    got_exit_signal = 1;
-    exit_signal = signum;
-  }
-  (void)signal(signum, exit_signal_handler);
-  errno = old_errno;
-}
-
-static void install_signal_handlers(void)
-{
-#ifdef SIGHUP
-  /* ignore SIGHUP signal */
-  old_sighup_handler = signal(SIGHUP, SIG_IGN);
-  if(old_sighup_handler == SIG_ERR)
-    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
-#endif
-#ifdef SIGPIPE
-  /* ignore SIGPIPE signal */
-  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
-  if(old_sigpipe_handler == SIG_ERR)
-    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
-#endif
-#ifdef SIGALRM
-  /* ignore SIGALRM signal */
-  old_sigalrm_handler = signal(SIGALRM, SIG_IGN);
-  if(old_sigalrm_handler == SIG_ERR)
-    logmsg("cannot install SIGALRM handler: %s", strerror(errno));
-#endif
-#ifdef SIGINT
-  /* handle SIGINT signal with our exit_signal_handler */
-  old_sigint_handler = signal(SIGINT, exit_signal_handler);
-  if(old_sigint_handler == SIG_ERR)
-    logmsg("cannot install SIGINT handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGINT, 1);
-#endif
-#ifdef SIGTERM
-  /* handle SIGTERM signal with our exit_signal_handler */
-  old_sigterm_handler = signal(SIGTERM, exit_signal_handler);
-  if(old_sigterm_handler == SIG_ERR)
-    logmsg("cannot install SIGTERM handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGTERM, 1);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  /* handle SIGBREAK signal with our exit_signal_handler */
-  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
-  if(old_sigbreak_handler == SIG_ERR)
-    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGBREAK, 1);
-#endif
-}
-
-static void restore_signal_handlers(void)
-{
-#ifdef SIGHUP
-  if(SIG_ERR != old_sighup_handler)
-    (void)signal(SIGHUP, old_sighup_handler);
-#endif
-#ifdef SIGPIPE
-  if(SIG_ERR != old_sigpipe_handler)
-    (void)signal(SIGPIPE, old_sigpipe_handler);
-#endif
-#ifdef SIGALRM
-  if(SIG_ERR != old_sigalrm_handler)
-    (void)signal(SIGALRM, old_sigalrm_handler);
-#endif
-#ifdef SIGINT
-  if(SIG_ERR != old_sigint_handler)
-    (void)signal(SIGINT, old_sigint_handler);
-#endif
-#ifdef SIGTERM
-  if(SIG_ERR != old_sigterm_handler)
-    (void)signal(SIGTERM, old_sigterm_handler);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  if(SIG_ERR != old_sigbreak_handler)
-    (void)signal(SIGBREAK, old_sigbreak_handler);
-#endif
-}
-
 /* returns true if the current socket is an IP one */
 static bool socket_domain_is_ip(void)
 {
@@ -2111,7 +1979,7 @@ int main(int argc, char *argv[])
   atexit(win32_cleanup);
 #endif
 
-  install_signal_handlers();
+  install_signal_handlers(false);
 
   pid = (long)getpid();
 
@@ -2394,7 +2262,7 @@ sws_cleanup:
     clear_advisor_read_lock(SERVERLOGS_LOCK);
   }
 
-  restore_signal_handlers();
+  restore_signal_handlers(false);
 
   if(got_exit_signal) {
     logmsg("========> %s sws (%s pid: %ld) exits with signal (%d)",
diff --git a/tests/server/tftpd.c b/tests/server/tftpd.c
index cac281c1e..0c94e1cb7 100644
--- a/tests/server/tftpd.c
+++ b/tests/server/tftpd.c
@@ -221,44 +221,6 @@ static sigjmp_buf timeoutbuf;
 static const unsigned int rexmtval = TIMEOUT;
 #endif
 
-/* do-nothing macro replacement for systems which lack siginterrupt() */
-
-#ifndef HAVE_SIGINTERRUPT
-#define siginterrupt(x,y) do {} while(0)
-#endif
-
-/* vars used to keep around previous signal handlers */
-
-typedef RETSIGTYPE (*SIGHANDLER_T)(int);
-
-#ifdef SIGHUP
-static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGPIPE
-static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
-#endif
-
-#ifdef SIGINT
-static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
-#endif
-
-#ifdef SIGTERM
-static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
-#endif
-
-#if defined(SIGBREAK) && defined(WIN32)
-static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
-#endif
-
-/* var which if set indicates that the program should finish execution */
-
-SIG_ATOMIC_T got_exit_signal = 0;
-
-/* if next is set indicates the first signal handled in exit_signal_handler */
-
-static volatile int exit_signal = 0;
-
 /*****************************************************************************
 *                            FUNCTION PROTOTYPES                             *
 *****************************************************************************/
@@ -295,12 +257,6 @@ static void justtimeout(int signum);
 
 #endif /* HAVE_ALARM && SIGALRM */
 
-static RETSIGTYPE exit_signal_handler(int signum);
-
-static void install_signal_handlers(void);
-
-static void restore_signal_handlers(void);
-
 /*****************************************************************************
 *                          FUNCTION IMPLEMENTATIONS                          *
 *****************************************************************************/
@@ -348,86 +304,6 @@ static void justtimeout(int signum)
 
 #endif /* HAVE_ALARM && SIGALRM */
 
-/* signal handler that will be triggered to indicate that the program
-  should finish its execution in a controlled manner as soon as possible.
-  The first time this is called it will set got_exit_signal to one and
-  store in exit_signal the signal that triggered its execution. */
-
-static RETSIGTYPE exit_signal_handler(int signum)
-{
-  int old_errno = errno;
-  if(got_exit_signal == 0) {
-    got_exit_signal = 1;
-    exit_signal = signum;
-  }
-  (void)signal(signum, exit_signal_handler);
-  errno = old_errno;
-}
-
-static void install_signal_handlers(void)
-{
-#ifdef SIGHUP
-  /* ignore SIGHUP signal */
-  old_sighup_handler = signal(SIGHUP, SIG_IGN);
-  if(old_sighup_handler == SIG_ERR)
-    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
-#endif
-#ifdef SIGPIPE
-  /* ignore SIGPIPE signal */
-  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
-  if(old_sigpipe_handler == SIG_ERR)
-    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
-#endif
-#ifdef SIGINT
-  /* handle SIGINT signal with our exit_signal_handler */
-  old_sigint_handler = signal(SIGINT, exit_signal_handler);
-  if(old_sigint_handler == SIG_ERR)
-    logmsg("cannot install SIGINT handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGINT, 1);
-#endif
-#ifdef SIGTERM
-  /* handle SIGTERM signal with our exit_signal_handler */
-  old_sigterm_handler = signal(SIGTERM, exit_signal_handler);
-  if(old_sigterm_handler == SIG_ERR)
-    logmsg("cannot install SIGTERM handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGTERM, 1);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  /* handle SIGBREAK signal with our exit_signal_handler */
-  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
-  if(old_sigbreak_handler == SIG_ERR)
-    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
-  else
-    siginterrupt(SIGBREAK, 1);
-#endif
-}
-
-static void restore_signal_handlers(void)
-{
-#ifdef SIGHUP
-  if(SIG_ERR != old_sighup_handler)
-    (void)signal(SIGHUP, old_sighup_handler);
-#endif
-#ifdef SIGPIPE
-  if(SIG_ERR != old_sigpipe_handler)
-    (void)signal(SIGPIPE, old_sigpipe_handler);
-#endif
-#ifdef SIGINT
-  if(SIG_ERR != old_sigint_handler)
-    (void)signal(SIGINT, old_sigint_handler);
-#endif
-#ifdef SIGTERM
-  if(SIG_ERR != old_sigterm_handler)
-    (void)signal(SIGTERM, old_sigterm_handler);
-#endif
-#if defined(SIGBREAK) && defined(WIN32)
-  if(SIG_ERR != old_sigbreak_handler)
-    (void)signal(SIGBREAK, old_sigbreak_handler);
-#endif
-}
-
 /*
  * init for either read-ahead or write-behind.
  * zero for write-behind, one for read-head.
@@ -757,7 +633,7 @@ int main(int argc, char **argv)
   atexit(win32_cleanup);
 #endif
 
-  install_signal_handlers();
+  install_signal_handlers(true);
 
   pid = (long)getpid();
 
@@ -930,7 +806,7 @@ tftpd_cleanup:
     clear_advisor_read_lock(SERVERLOGS_LOCK);
   }
 
-  restore_signal_handlers();
+  restore_signal_handlers(true);
 
   if(got_exit_signal) {
     logmsg("========> %s tftpd (port: %d pid: %ld) exits with signal (%d)",
diff --git a/tests/server/util.c b/tests/server/util.c
index 24f9497ae..5dd4e0a7f 100644
--- a/tests/server/util.c
+++ b/tests/server/util.c
@@ -509,3 +509,142 @@ long timediff(struct timeval newer, struct timeval older)
   return (long)(newer.tv_sec-older.tv_sec)*1000+
     (long)(newer.tv_usec-older.tv_usec)/1000;
 }
+
+/* do-nothing macro replacement for systems which lack siginterrupt() */
+
+#ifndef HAVE_SIGINTERRUPT
+#define siginterrupt(x,y) do {} while(0)
+#endif
+
+/* vars used to keep around previous signal handlers */
+
+typedef RETSIGTYPE (*SIGHANDLER_T)(int);
+
+#ifdef SIGHUP
+static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
+#endif
+
+#ifdef SIGPIPE
+static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
+#endif
+
+#ifdef SIGALRM
+static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
+#endif
+
+#ifdef SIGINT
+static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
+#endif
+
+#ifdef SIGTERM
+static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
+#endif
+
+#if defined(SIGBREAK) && defined(WIN32)
+static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
+#endif
+
+/* var which if set indicates that the program should finish execution */
+volatile int got_exit_signal = 0;
+
+/* if next is set indicates the first signal handled in exit_signal_handler */
+volatile int exit_signal = 0;
+
+/* signal handler that will be triggered to indicate that the program
+ * should finish its execution in a controlled manner as soon as possible.
+ * The first time this is called it will set got_exit_signal to one and
+ * store in exit_signal the signal that triggered its execution.
+ */
+static RETSIGTYPE exit_signal_handler(int signum)
+{
+  int old_errno = errno;
+  logmsg("exit_signal_handler: %d", signum);
+  if(got_exit_signal == 0) {
+    got_exit_signal = 1;
+    exit_signal = signum;
+  }
+  (void)signal(signum, exit_signal_handler);
+  errno = old_errno;
+}
+
+void install_signal_handlers(bool keep_sigalrm)
+{
+#ifdef SIGHUP
+  /* ignore SIGHUP signal */
+  old_sighup_handler = signal(SIGHUP, SIG_IGN);
+  if(old_sighup_handler == SIG_ERR)
+    logmsg("cannot install SIGHUP handler: %s", strerror(errno));
+#endif
+#ifdef SIGPIPE
+  /* ignore SIGPIPE signal */
+  old_sigpipe_handler = signal(SIGPIPE, SIG_IGN);
+  if(old_sigpipe_handler == SIG_ERR)
+    logmsg("cannot install SIGPIPE handler: %s", strerror(errno));
+#endif
+#ifdef SIGALRM
+  if(!keep_sigalrm) {
+    /* ignore SIGALRM signal */
+    old_sigalrm_handler = signal(SIGALRM, SIG_IGN);
+    if(old_sigalrm_handler == SIG_ERR)
+      logmsg("cannot install SIGALRM handler: %s", strerror(errno));
+  }
+#else
+  (void)keep_sigalrm;
+#endif
+#ifdef SIGINT
+  /* handle SIGINT signal with our exit_signal_handler */
+  old_sigint_handler = signal(SIGINT, exit_signal_handler);
+  if(old_sigint_handler == SIG_ERR)
+    logmsg("cannot install SIGINT handler: %s", strerror(errno));
+  else
+    siginterrupt(SIGINT, 1);
+#endif
+#ifdef SIGTERM
+  /* handle SIGTERM signal with our exit_signal_handler */
+  old_sigterm_handler = signal(SIGTERM, exit_signal_handler);
+  if(old_sigterm_handler == SIG_ERR)
+    logmsg("cannot install SIGTERM handler: %s", strerror(errno));
+  else
+    siginterrupt(SIGTERM, 1);
+#endif
+#if defined(SIGBREAK) && defined(WIN32)
+  /* handle SIGBREAK signal with our exit_signal_handler */
+  old_sigbreak_handler = signal(SIGBREAK, exit_signal_handler);
+  if(old_sigbreak_handler == SIG_ERR)
+    logmsg("cannot install SIGBREAK handler: %s", strerror(errno));
+  else
+    siginterrupt(SIGBREAK, 1);
+#endif
+}
+
+void restore_signal_handlers(bool keep_sigalrm)
+{
+#ifdef SIGHUP
+  if(SIG_ERR != old_sighup_handler)
+    (void)signal(SIGHUP, old_sighup_handler);
+#endif
+#ifdef SIGPIPE
+  if(SIG_ERR != old_sigpipe_handler)
+    (void)signal(SIGPIPE, old_sigpipe_handler);
+#endif
+#ifdef SIGALRM
+  if(!keep_sigalrm) {
+    if(SIG_ERR != old_sigalrm_handler)
+      (void)signal(SIGALRM, old_sigalrm_handler);
+  }
+#else
+  (void)keep_sigalrm;
+#endif
+#ifdef SIGINT
+  if(SIG_ERR != old_sigint_handler)
+    (void)signal(SIGINT, old_sigint_handler);
+#endif
+#ifdef SIGTERM
+  if(SIG_ERR != old_sigterm_handler)
+    (void)signal(SIGTERM, old_sigterm_handler);
+#endif
+#if defined(SIGBREAK) && defined(WIN32)
+  if(SIG_ERR != old_sigbreak_handler)
+    (void)signal(SIGBREAK, old_sigbreak_handler);
+#endif
+}
diff --git a/tests/server/util.h b/tests/server/util.h
index 0ae61aee5..0446b6a84 100644
--- a/tests/server/util.h
+++ b/tests/server/util.h
@@ -66,4 +66,13 @@ void clear_advisor_read_lock(const char *filename);
 
 int strncasecompare(const char *first, const char *second, size_t max);
 
+/* global variable which if set indicates that the program should finish */
+extern volatile int got_exit_signal;
+
+/* global variable which if set indicates the first signal handled */
+extern volatile int exit_signal;
+
+void install_signal_handlers(bool keep_sigalrm);
+void restore_signal_handlers(bool keep_sigalrm);
+
 #endif  /* HEADER_CURL_SERVER_UTIL_H */