man errno

The errno in Linux When executing system calls under Linux, a return value typically indicates success or failure, but this value only indicates success or failure, but does not indicate how successful or failed.Errno is to solve this problem,

  1. Relationship between printf and fprintf 1 printf ()# Include Int printf (const char * format ,...);The printf () function prints the output to stdout (standard output) and other parameters according to the format given by format. For the output

All along, the personal concept of only non-blocking socket will produce eagain error, meaning is currently not read and write, as long as you continue to try again. When we recently redis an error in the module to correct this concept of my mistake.

Reproduced from: http://my.oschina.net/renhc/blog/54582 Today, a program that has been running for nearly a year has suddenly hung up, the problem is located to the system () function of the problem, the simple use of this function in my previous

Glibc_error reporting, glibc_error Many functions in the gnu c library detect and report error conditions. Our program needs to detect these error conditions. For example, when opening an input file, we need to determine whether the file is

Although the words are slightly exaggerated, but the fact is, the current network programming is almost all using the socket.--Thoughts on practical programming and open source project research.We know the value of the exchange of information, how

"Everything is socket!. ”Although the words are slightly exaggerated, but the fact is, the current network programming is almost all using the socket.--Thoughts on practical programming and open source project research.We know the value of the

Definition and usageThe set_error_handler () function sets the custom error handling function.This function is used to create your own error handling methods during runtime.This function returns the old error handler. If it fails, null is

# Identifying system performance bottlenecks # strace & ltraceStrace and ltrace correspond to system calls and library function calls respectively. system calls actually refer to the underlying call. In the linux program design, they refer to the

What is socket 　　A socket interface is an API of a TCP/IP network. A socket interface defines many functions or routines. programmers can use it to develop applications on a TCP/IP network. To learn TCP/IP network programming on the internet, you