From 2e4a91e8dac81838a2a35e7aed5a74c3ec098e0e Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Tue, 31 Mar 2015 00:38:23 -0400
Subject: ppsthread.[ch] and timespec_str.c are now fully detached from the
 rest of GPSD.

This means they could be dropped into NTP or another time-service program.
The only requirement is to set -DHAVE_SYS_TIMEPPS_H if you want the RFC2783
code compiled in.
---
 SConstruct  |  3 +--
 ppsthread.c |  8 ++++++--
 ppsthread.h | 20 ++++++++++----------
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/SConstruct b/SConstruct
index 60b93e95..51d0654e 100644
--- a/SConstruct
+++ b/SConstruct
@@ -727,10 +727,9 @@ else:
                 confdefs.append("#define %s \"%s\"\n" % (key.upper(), value))
 
     if config.CheckHeader(["sys/types.h", "sys/time.h", "sys/timepps.h"]):
-        confdefs.append("#define HAVE_SYS_TIMEPPS_H 1\n")
+        env.MergeFlags("-DHAVE_SYS_TIMEPPS_H=1")
         kpps = True
     else:
-        confdefs.append("/* #undef HAVE_SYS_TIMEPPS_H */\n")
         kpps = False
     tiocmiwait = config.CheckHeaderDefines("sys/ioctl.h", "TIOCMIWAIT")
     if env["pps"] and not tiocmiwait and not kpps:
diff --git a/ppsthread.c b/ppsthread.c
index 1c270820..3e850795 100644
--- a/ppsthread.c
+++ b/ppsthread.c
@@ -1,6 +1,8 @@
 /*
  * ppsthread.c - manage PPS watcher threads
  *
+ * To enable KPPS, this file needs to be compiled with -DHAVE_SYS_TIMEPPS_H
+ *
  * If you are not good at threads do not touch this file!
  * For example: errno is thread safe; strerror() is not.
  *
@@ -59,7 +61,6 @@
 #include <unistd.h>
 #include <pthread.h>		/* pacifies OpenBSD's compiler */
 
-#include "gpsd_config.h"
 #include "timespec_str.h"
 #include "ppsthread.h"
 
@@ -184,9 +185,12 @@ static int init_kernel_pps(volatile struct pps_thread_t *pps_thread)
      * Some Linuxes, like the RasbPi's, have PPS devices preexisting.
      * Other OS have no way to automatically determine the proper /dev/ppsX.
      * Allow user to pass in an explicit PPS device path.
+     *
+     * (We use strncpy() here because this might be compiled where
+     * strlcpy() is not available.) 
      */
     if (strncmp(pps_thread->devicename, "/dev/pps", 8) == 0)
-	(void)strlcpy(path, pps_thread->devicename, sizeof(path));
+	(void)strncpy(path, pps_thread->devicename, sizeof(path));
     else {
 	char pps_num = '\0';  /* /dev/pps[pps_num] is our device */
 	size_t i;             /* to match type of globbuf.gl_pathc */
diff --git a/ppsthread.h b/ppsthread.h
index 3d4aece7..ae9c824c 100644
--- a/ppsthread.h
+++ b/ppsthread.h
@@ -6,6 +6,16 @@
 #ifndef PPSTHREAD_H
 #define PPSTHREAD_H
 
+#include <time.h>
+
+#ifndef TIMEDELTA_DEFINED
+#define TIMEDELTA_DEFINED
+struct timedelta_t {
+    struct timespec	real;
+    struct timespec	clock;
+};
+#endif /* TIMEDELTA_DEFINED */
+
 /* use RFC 2782 PPS API */
 /* this needs linux >= 2.6.34 and
  * CONFIG_PPS=y
@@ -15,20 +25,10 @@
 #if defined(HAVE_SYS_TIMEPPS_H)
 // include unistd.h here as it is missing on older pps-tools releases.
 // 'close' is not defined otherwise.
-#include <unistd.h>
 #include <sys/time.h>
 #include <sys/timepps.h>
 #endif
 
-#ifndef TIMEDELTA_DEFINED
-#define TIMEDELTA_DEFINED
-struct timedelta_t {
-    struct timespec	real;
-    struct timespec	clock;
-};
-#endif /* TIMEDELTA_DEFINED */
-
-
 /* difference between timespecs in nanoseconds */
 /* int is too small, avoid floats  */
 /* WARNING!  this will overflow if x and y differ by more than a few seconds */
-- 
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