Name

Synopsis

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

Description

The type parameter is of type lc_var_type_t which specifies the type of the data parameter. Valid values for type are:

LC_VAR_STRING

For a string type variable. The data passed should be of type "char **". The data will be set to a region of memory that has been allocated with malloc() and can be released be free()’d.

LC_VAR_LONG_LONG

For a "long long" integer type variable. The data passed should be of type "long long *".

LC_VAR_LONG

For a "long" integer type variable. The data passed should be of type "long *".

LC_VAR_INT

For a "int" integer type variable. The data passed should be of type "int *".

LC_VAR_SHORT

For a "short" integer type variable. The data passed should be of type "short *".

LC_VAR_BOOL

For a boolean type variable. The data passed should be of type "int *". When a true value is specified the variable is set to 1. When a false value is specified the variable is set to 0. Any other value sets the variable to -1. Valid true values are: enable, true, yes, on, y, and 1. Valid false values are: disable, false, off, no, n, and 0.

LC_VAR_FILENAME

Not implemented.

LC_VAR_DIRECTORY

Not implemented.

LC_VAR_SIZE_LONG_LONG

For a "long long" integer type that can have size modifiers, such as ’G’ or gigabytes, ’M’ for megabytes, ’K’ for kilobytes. The data passed should be of type "long long *".

LC_VAR_SIZE_LONG

For a "long" integer type that can have size modifiers, such as ’G’ or gigabytes, ’M’ for megabytes, ’K’ for kilobytes. The data passed should be of type "long *".

LC_VAR_SIZE_INT

For a "int" integer type that can have size modifiers, such as ’G’ or gigabytes, ’M’ for megabytes, ’K’ for kilobytes. The data passed should be of type "int *".

LC_VAR_SIZE_SHORT

For a "short" integer type that can have size modifiers, such as ’G’ or gigabytes, ’M’ for megabytes, ’K’ for kilobytes. The data passed should be of type "short *".

LC_VAR_SIZE_SIZE_T

For a "size_t" data type that can have size modifiers, such as ’G’ or gigabytes, ’M’ for megabytes, ’K’ for kilobytes. The data passed should be of type "size_t *".

LC_VAR_TIME

Not implemented.

LC_VAR_DATE

Not implemented.

LC_VAR_BOOL_BY_EXISTANCE

This type of variable takes no arguments, it is set to true (1) by its existance in a configuration file, environment variable, or on the command line. If it is not specified, the value of the data passed is not changed. The data passed should be of type "int *".

LC_VAR_CIDR

This type of variable accepts a CIDR format netmask and IP. This is not yet implemented. (XXX)

LC_VAR_IP

This type of variable accepts an IP address in decimal-dot format. The value is stored in a uint32_t.

LC_VAR_ADDR

This type of variable accepts an address in either host or decimal-dot format. The value is stored in a uint32_t. This is not yet implemented. (XXX)

Return Value

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;
    long int counter = -1;
    lc_rv_ret = lc_register_var("Begin", LC_VAR_LONG,
                                &counter, ’c’);
    if (lc_rv_ret != 0) {
        fprintf(stderr, "Error registering variable: %i.\n",
                lc_geterrno());
        return(EXIT_FAILURE);
    }
    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");
    }
    if (counter != -1) {
        printf("Counter was specified as: %ld\n", counter);
    } else {
        printf("Counter was not specified.\n");
    }
    return(EXIT_SUCCESS);
}

See Also

Table of Contents

• Name
• Synopsis
• Description
• Return Value
• Example
• See Also