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32 行
678 B
32 行
678 B
#include <stdio.h>
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#include <ulib.h>
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int
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main(void) {
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int pid, ret, i ,j;
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cprintf("I am the parent. Forking the child...\n");
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pid = fork();
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if (pid== 0) {
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cprintf("I am the child. spinning ...\n");
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while (1);
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}else if (pid<0) {
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panic("fork child error\n");
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}
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cprintf("I am the parent. Running the child...\n");
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yield();
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yield();
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yield();
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cprintf("I am the parent. Killing the child...\n");
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assert((ret = kill(pid)) == 0);
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cprintf("kill returns %d\n", ret);
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assert((ret = waitpid(pid, NULL)) == 0);
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cprintf("wait returns %d\n", ret);
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cprintf("spin may pass.\n");
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return 0;
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}
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