49 lines
764 B
C
49 lines
764 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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int main(int argc, char **argv)
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{
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int counter = 0;
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int status;
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printf("parent: pid = %d; ppid = %d\n", getpid(), getppid());
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pid_t pid = fork();
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if (pid == 0)
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{
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// child process
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printf("child: pid = %d; ppid = %d\n", getpid(), getppid());
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int i = 0;
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for (; i < 5; ++i)
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{
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printf("child: counter=%d\n", ++counter);
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}
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}
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else if (pid > 0)
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{
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// parent process
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int j = 0;
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for (; j < 5; ++j)
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{
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printf("parent: counter=%d\n", ++counter);
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}
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wait(&status);
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if(status != 0){
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printf("parent: child exited with status %d\n", status);
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return 2;
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}
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}
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else
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{
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// fork failed
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printf("parent: fork() failed!\n");
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return 1;
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}
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return 0;
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}
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