diff options
Diffstat (limited to 'pause')
| -rw-r--r-- | pause/.gitignore | 3 | ||||
| -rw-r--r-- | pause/Makefile | 13 | ||||
| -rw-r--r-- | pause/pause.c | 37 |
3 files changed, 53 insertions, 0 deletions
diff --git a/pause/.gitignore b/pause/.gitignore new file mode 100644 index 000000000..b7735d560 --- /dev/null +++ b/pause/.gitignore @@ -0,0 +1,3 @@ +/.container-* +/.push-* +/bin diff --git a/pause/Makefile b/pause/Makefile new file mode 100644 index 000000000..f0951af72 --- /dev/null +++ b/pause/Makefile @@ -0,0 +1,13 @@ +src = $(wildcard *.c) +obj = $(src:.c=.o) + +override LIBS += +override CFLAGS += -std=c99 -Os -Wall -Wextra -static + +pause: $(obj) + $(CC) -o ../bin/$@ $^ $(CFLAGS) $(LIBS) + strip ../bin/$@ + +.PHONY: clean +clean: + rm -f $(obj) ../bin/pause diff --git a/pause/pause.c b/pause/pause.c new file mode 100644 index 000000000..c3066ddc4 --- /dev/null +++ b/pause/pause.c @@ -0,0 +1,37 @@ +/* +Copyright 2016 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +#define _GNU_SOURCE +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +static void sigdown(int signo) { + psignal(signo, "shutting down, got signal"); + exit(0); +} + +int main() { + if (signal(SIGINT, sigdown) == SIG_ERR) + return 1; + if (signal(SIGTERM, sigdown) == SIG_ERR) + return 2; + signal(SIGKILL, sigdown); + for (;;) pause(); + fprintf(stderr, "error: infinite loop terminated\n"); + return 42; +} |