1、先进入一下目录 cd /var/lib/dpkg 2、再删除文件 sudo mv info info.baksudo 3、最后重新创建info mkdir info
typedef enum { SUCCESS = 0, ERROR_DIVIDE_BY_ZERO, ERROR_INVALID_INPUT, // 其他错误... } ErrorCode; ErrorCode divide(int a, int b) { if (b == 0) { return ERROR_DIVIDE_BY_ZERO; } // 其他检查... return SUCCESS; } 通过这种方式,可以更精确地识别和处理各种错误情况。
Linux grep return code The exit code is 1 because nothing was matched by grep. EXIT STATUS The exit status is 0 if selected lines are found, and 1 if not found. If an error occurred the exit status is 2. (Note: POSIX error handling code should check for '2' or greater.) The outp...
在编写带有return语句的函数时要小心检查所有的代码路径(Code Path)。有些代码路径在任何条件下都执行不到,这称为Dead Code,例如把&&和||运算符记混了(据我了解初学者犯这个低级错误的不在少数),写出如下代码: void foo(int x, int y) { if (x >= 0 || y >= 0) { printf("both x and y are ...
grpc code返回码201返回码 了解基本http状态码。HTTP状态码是服务器和客户端之间交流信息的语言。1XX系列指定客户端应相应的某些动作,代表请求已被接受,需要继续处理。由于 HTTP/1.0 协议中没有定义任何 1xx 状态码,所以除非在某些试验条件下,服务器禁止向此类客户端发送 1xx 响应。2XX系列代表请求已成功被服务器...
pid: %d, ppid: %d\n",getpid(),getppid());sleep(1);cnt--;}exit(1);}int status=0;pid_t rid=waitpid(id,&status,0);// 阻塞等待if(rid>0){printf("wait success, rid: %d, status: %d, exit_signal: %d, exit_code: %d\n",rid,status,status&0x7f,(status>>8)&0xff);}return0;...
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/*初始化串口通信设置*/|-->console_init_f(common/console.c) /*初始化控制台*/|-->...|-->relocate_code(arch/arm/lib/relocate.S) /*主要完成镜像拷贝和重定位*/|-->relocate_vectors(arch/arm/lib/relocate.S)/*重定位向量表*/|-->board_init_r(common/board_r.c)/*板级初始化*/|-->in...
return 1; } /* Handle parameter "bootmode=" */ __setup("bootmode=", is_bootmode_setup); if (bootmode) { /* Print verbose output */ /* ... */ } /* ... */ /* If bootmode is 1, choose an init runlevel of 3, else ...