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https://github.com/clearlinux/graphene.git
synced 2026-09-06 13:51:28 +00:00
Isaku Yamahata
f72cd48ee5
Before, pause() was emulated by sleeping for 1s in a loop until signal interrupted it. If signal arrived in-between these invocations then pause() could never return. Also, pause() incorrectly returned 0 instead of -1 and errno=EINTR. This patch emulates pause() by sleeping for a very long time (years). Also, it correctly returns EINTR.
28 lines
451 B
C
28 lines
451 B
C
#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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void handler(int signal)
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{
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printf("hello world\n");
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}
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int main(int argc, char ** argv)
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{
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if (signal(SIGALRM, &handler) < 0)
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return EXIT_FAILURE;
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if (alarm(1) < 0)
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return EXIT_FAILURE;
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int ret = pause();
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assert(ret == -1);
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assert(errno == EINTR);
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printf("good bye\n");
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return 0;
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}
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