27 lines
646 B
C
27 lines
646 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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int
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main(int argc, char *argv[])
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{
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printf("hello world (pid:%d)\n", (int) getpid());
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int rc = fork();
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if (rc < 0) {
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// fork failed; exit
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fprintf(stderr, "fork failed\n");
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exit(1);
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} else if (rc == 0) {
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// child (new process)
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printf("hello, I am child (pid:%d)\n", (int) getpid());
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sleep(1);
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} else {
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// parent goes down this path (original process)
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int wc = wait(NULL);
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printf("hello, I am parent of %d (wc:%d) (pid:%d)\n",
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rc, wc, (int) getpid());
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}
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return 0;
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}
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