Reading a key=value configuration file without globall section using glib own GKeyFile

key_value_config.c

#include <stdio.h>
#include <glib.h>
#include <string.h>
#include <stdlib.h>


int main(void)
{
  GKeyFile *config = g_key_file_new();

  gchar header[] = "[general]\n\n";
  gchar * buffer = 0;
  long length;
  FILE * f = fopen ("test.cfg", "rb");
  if (f)
    {
      fseek(f, 0, SEEK_END);
      length = ftell(f);
      fseek(f, 0, SEEK_SET);
      buffer = malloc(length + strlen(header));
      memcpy(buffer, header, strlen(header));

      if (buffer)
	{
	  fread(buffer + strlen(header), 1, length, f);
	}
      fclose(f);
    }

  if(buffer) {
    g_key_file_load_from_data(config, buffer, length + strlen(header) - 1, G_KEY_FILE_NONE, NULL);

    printf("val=%s\n", g_key_file_get_string(config, "general", "foo", NULL));
  }
  
  g_key_file_free(config);

  return 0;
}