LIBCONFIG

Section: C Library Functions (3)
Updated: 25 Oct 04
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NAME

libconfig - Consistent configuration library.

SYNOPSIS

#include <libconfig.h>

int lc_register_callback(const char *var, char opt, lc_var_type_t type, int (*callback)(const char *, const char *, const char *, const char *, lc_flags_t, void *), void *extra);

int lc_register_var(const char *var, lc_var_type_t type, void *data, char opt);

int lc_process(int argc, char **argv, const char *appname, lc_conf_type_t type, const char *extra);

lc_err_t lc_geterrno(void);

char *lc_geterrstr(void);

void lc_seterrstr(const char *errstr);

int lc_handle_type(lc_var_type_t type, const char *value, void *data);

void lc_cleanup(void);

DESCRIPTION

Libconfig is a library to provide easy access to configuration data in a consistent and logical manner. Variables (registered through lc_register_var(3) or lc_register_callback(3)) are processed with the lc_process(3) and lc_process_file(3) functions. Errors can be examined through lc_geterrno(3) and lc_geterrstr(3). Clean-up may be performed using the lc_cleanup(3) function.

EXAMPLE

#include <libconfig.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char **argv) {
        int lc_p_ret, lc_rv_ret;
        char *filename = NULL;

        lc_rv_ret = lc_register_var("File", LC_VAR_STRING,
                                    &filename, 'f');

        if (lc_rv_ret != 0) {
                fprintf(stderr, "Error registering variable: %i.\n",
                        lc_geterrno());
                return(EXIT_FAILURE);
        }

        lc_p_ret = lc_process(argc, argv, "example", LC_CONF_APACHE,
                              NULL);

        lc_cleanup();

        if (lc_p_ret != 0) {
                fprintf(stderr, "Error processing configuration: \
                        %s\n", lc_geterrstr());
                return(EXIT_FAILURE);
        }

        if (filename != NULL) {
                printf("File specified was: %s\n", filename);
        } else {
                printf("No filename specified.\n");
        }

        return(EXIT_SUCCESS);
}