void-packages/srcpkgs/pps-tools/patches/ppswatch-signal.patch

79 lines
2.2 KiB
Diff

# src: https://github.com/redlab-i/pps-tools/commit/6deb88a80529f76a1ff1bdc9f1d0eb15c46c87e4.patch
From 6deb88a80529f76a1ff1bdc9f1d0eb15c46c87e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konrad=20Gr=C3=A4fe?= <konradgraefe@aol.com>
Date: Fri, 10 Aug 2018 09:47:33 +0200
Subject: [PATCH] ppswatch: Fix quitting after signal
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The ppswatch quitting mechanism relies on time_pps_fetch() being
interrupted by a signal. Therefore when ppswatch receives a signal while
it's not within time_pps_fetch() it would print the stastics but not
quit the application.
I can reliably reproduce the issue on my embedded machine (using the
pps-gpio driver) by running the following snippet:
./ppswatch -a /dev/pps3 &
pid=$!
sleep 3
kill $pid
This patch fixes the issue.
Signed-off-by: Konrad Gräfe <konradgraefe@aol.com>
---
ppswatch.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/ppswatch.c b/ppswatch.c
index eb0500c..5c6202b 100644
--- ppswatch.c
+++ ppswatch.c
@@ -14,6 +14,7 @@
* GNU General Public License for more details.
*/
+#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
@@ -39,6 +40,8 @@ static int max_divergence = 0;
static double mean = 0.0;
static double M2 = 0.0;
+static volatile bool quit = false;
+
int find_source(char *path, pps_handle_t *handle, int *avail_mode)
{
pps_params_t params;
@@ -112,8 +115,8 @@ int fetch_source(pps_handle_t handle, int avail_mode)
ret = time_pps_fetch(handle, PPS_TSFMT_TSPEC, &infobuf,
&timeout);
}
- if (ret < 0) {
- if (errno == EINTR) {
+ if (ret < 0 || quit) {
+ if (errno == EINTR || quit) {
return -1;
}
@@ -244,6 +247,7 @@ void print_stats()
static void sighandler_exit(int signum) {
print_stats();
+ quit = true;
}
int main(int argc, char *argv[])
@@ -272,7 +276,7 @@ int main(int argc, char *argv[])
/* loop, printing the most recent timestamp every second or so */
while (1) {
ret = fetch_source(handle, avail_mode);
- if (ret < 0 && errno == EINTR) {
+ if ((ret < 0 && errno == EINTR) || quit) {
ret = 0;
break;
}