C linux - reading config file.

[Fujitaka]

I am tring to figure out how to write something that will read/write to a config file on linux. I been searching around the forums/google. Even the ansi C book I have. I am confused. I tried reading on fopen, fprintf, fgets. <-- Things like that. But still can't figure out how to do it. .

The standard config file type.
[n1]
on=1
trigger=Sometext
[n2]
on=1
trigger=Sometext

Say for example I want to grab the text after trigger= then use it somewhere else in my app. I am not sure how that is done. To me it seems like something simple.

I figured maby something like this could be used to start it, but after that. I am confused.

#include <stdio.h>

int main() {
char test[256];    
FILE *file;  

  file = fopen("somefile", "r"); 

  if(file==NULL) {
    printf("Error: can't open file.\n");
    return 1;
  }
  else {
    while(fgets(test, 10, file)!=NULL) { 
         }
    fclose(file);
    return 0;
  }
}

[quzah]

The function you're probably looking for is sscanf.


Quzah.

[cyberfish]

I suspect there is a library for it, though, since this configuration "format" is very popular.

[lgddd_12]

Maybe what you want is: iniparser
iniParser: stand-alone ini Parser library in ANSI C

[Bayint Naung]

Have you try googling parsing linux config file?
Key-value file parser
Linux configuration file libraries - Stack Overflow

[Salem]

Or bumping 2 year old threads.