30 lines
461 B
C
30 lines
461 B
C
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#include <sys/types.h>
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#include <sys/wait.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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int
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main(void)
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{
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int status = 0;
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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exit(EXIT_FAILURE);
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}
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else if (pid > 0) {
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waitpid(pid, &status, 0);
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if (!WIFEXITED(status)) {
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fprintf(stderr, "child exited due to an error\n");
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}
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printf("goodbye: %d\n", status);
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}
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else {
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printf("hello: %d\n", status);
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}
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exit(EXIT_SUCCESS);
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}
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