#include <sys/types.h> #include <stdio.h> #include <stdlib.h>
int glob = 6; char buf[] = "a write to stdout/n";
int main() { int var; pid_t pid; var = 88; fprintf(stderr, "%s", buf); printf("before fork/n"); if(( pid = fork() ) < 0 ) { fprintf(stderr, "fork error/n"); } else if(pid == 0) { glob++; var++; printf("child process/n"); printf("pid = %d, father pid = %d, glob = %d, var = %d/n", getpid(), getppid(), glob, var); exit(0); } else { sleep(2); printf("father process/n"); printf("pid = %d, father pid = %d, glob = %d, var = %d/n", getpid(), getppid(), glob, var); } return 0; } |