Sample code for log output code template under linux c
Preface
This article mainly introduces the relevant content of the log output code template under linux c, which is shared for your reference and study. I won't say much below, let's take a look at the detailed introduction.
Template
The template is divided into two files: log.c and log.h.
Log.c
/ * * log.c * * / # include # include "log.h" / / log file path # define filepath ". / ps_com_log.log" / / set time static char * settime (char * time_s) {time_t timer=time (NULL); strftime (time_s, 20, "% Y-%m-%d% H:%M:%S", localtime (& timer)); return time_s } / * * print * * / static int PrintfLog (char * logText, char * string) {FILE * fd = NULL; char s [1024]; char tmp [1024]; / / Open the file fd = fopen (filepath, "a +") by appending; if (fd = = NULL) {return-1;} memset (s, 0Coje sizeof (s)); memset (tmp, 0Jing sizeof (tmp)) Sprintf (tmp, "* [pid=%d]: [", getpid ()); strcpy (s, tmp); memset (tmp, 0jewellery sizeof (tmp)); settime (tmp); strcat (s, tmp); strcat (s, "] *"); fprintf (fd, "% s", s); fprintf (fd, "* [% s] *:\ n", logText); fprintf (fd, "% s\ n", string); fclose (fd) } / * * log write * * / void LogWrite (char * logText,char * string) {/ / [locking is required to support multithreading] pthread_mutex_lock (& mutex_log); / / lock. / / print log information PrintfLog (logText, string); / / [lock is required to support multithreading] pthread_mutex_unlock (& mutex_log); / / unlock. }
Log.h
# ifndef _ LOG_H__#define _ LOG_H__#include # include # include void LogWrite (char * logText,char * string); # endif / * _ LOG_H__ * /
Test file
Now that you have the log output feature, let's briefly test it:
# include "stdio.h" # include "log.h" int main (int argv,char**argc) {printf ("test\ n"); LogWrite ("INFO", "Hello World!"); LogWrite ("error", "H.e.l.l.o W.o.r.l.d!"); LogWrite ("mint", "Hello World!"); LogWrite ("iout", "Hallo World!"); return 0;}
The above code is very simple and does not explain too much.
Running result:
* [pid=15971]: [2018-12-05 14:24:21] * [INFO] *:
Hello World!
* [pid=15971]: [2018-12-05 14:24:21] * [error] *:
H.e.l.l.o W.o.r.l.d!
* [pid=15971]: [2018-12-05 14:24:21] * [mint] *:
H e l l o W o r l d!
* [pid=15971]: [2018-12-05 14:24:21] * [iout] *:
Hallo World!
Summary
The above is the whole content of this article, I hope that the content of this article has a certain reference and learning value for your study or work, if you have any questions, you can leave a message and exchange, thank you for your support.
