25 lines
471 B
C
25 lines
471 B
C
#include <stdio.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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int main()
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{
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pid_t pid;
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pid = fork();
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if (pid == 0)
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{
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// 子进程
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printf("10 秒后子进程退出\n");
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int s = alarm(10); // 第一次调用, s 返回 0
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printf("alarm s is %d\n", s);
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sleep(3);
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s = alarm(10);
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printf("alarm s is %d\n", s);
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while (1)
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;
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}
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return 0;
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} |