LC_GETERRNO

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

lc_geterrno - Retrieve a numeric error code.

SYNOPSIS

#include <libconfig.h>

lc_err_t lc_geterrno(void);

DESCRIPTION

The lc_geterrno(3) function returns the last numeric error code set as an lc_err_t which is an enumerated type and can be cast to any integer type.

The lc_err_t type specifies the following defined values:

LC_ERR_NONE: No error was found. Success.
LC_ERR_INVCMD: A command was specified for which there was no handler.
LC_ERR_INVSECTION: A section was specified for which there was no handler.
LC_ERR_INVDATA: A value that does not make sense was specified, such as a non-existant type to the lc_process_file(3) function.
LC_ERR_BADFORMAT: An invalid format was detected, such as no argument where on was expected, or a value passed to a boolean-specified variable whose value was not one of: enable, true, yes, on, y, 1, disable, false, off, no, n, 0.
LC_ERR_CANTOPEN: Unable to open a specified file.
LC_ERR_CALLBACK: A callback function returned an error (LC_CBRET_ERROR).
LC_ERR_ENOMEM: Memory could not be allocated for internal structures.

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);
}