splinter_cli_cmd_unset.c

/**
 * Copyright 2025 Tim Post
 * License: Apache 2 (MIT available upon request to timthepost@protonmail.com)
 *
 * @file splinter_cli_cmd_unset.c
 * @brief Implements the CLI 'unset' command.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "splinter_cli.h"

static const char *modname = "unset";

void help_cmd_unset(unsigned int level) {
    (void) level;
    printf("%s un-sets the value of a key in the store\n", modname);
    printf("Usage: %s <key_name>\n", modname);
    return;
}

int cmd_unset(int argc, char *argv[]) {
    size_t deleted = 0;
    char key[SPLINTER_KEY_MAX] = { 0 };
    char *tmp = getenv("SPLINTER_NS_PREFIX");

    if (argc != 2) {
        help_cmd_unset(1);
        return 1;
    }
    snprintf(key, sizeof(key) - 1, "%s%s", tmp == NULL ? "" : tmp, argv[1]);

    deleted = splinter_unset(key);
    if ((int) deleted < 0)
        return (int) deleted;
    
    printf("%lu bytes deleted.\n", deleted);

    return 0;
}