exit的状态

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下面是一个实例，来演示不通的exit值

#include <stdio.h>#include <stdlib.h>#include <sys/wait.h>void pt_exit(int status){if(WIFEXITED(status))printf("nomal termination, exit status = %d\n",WEXITSTATUS(status));else if(WIFSIGNALED(status))printf("abnomal termination, signal number = %d%s\n",WTERMSIG(status), "");else if(WIFSTOPPED(status))printf("child stopped, signal number = %d\n",WSTOPSIG(status));}int main(void){pid_t pid;int status;if((pid = fork()) < 0)printf("error: fork error.\n");else if(pid == 0)exit(7);if(wait(&status) != pid)printf("error: wait error.\n");pt_exit(status);if((pid = fork()) < 0)printf("error: fork error.\n");else if(pid == 0)abort();if(wait(&status) != pid)printf("error: wait error.\n");pt_exit(status);if((pid = fork()) < 0)printf("error: fork error.\n");else if(pid == 0)status /= 0;if(wait(&status) != pid)printf("error: wait error.\n");pt_exit(status);exit(0);}