function::kernel_string_utf32 - Linux


The function::kernel_string_utf32 command is designed to process and manipulate UTF-32 encoded strings within the Linux kernel. It provides a suite of functions to assist in string handling tasks, making it a valuable tool for kernel developers and programmers working with Unicode-based systems.


void function::kernel_string_utf32(const char *str, ssize_t size);


  • str: Pointer to a NULL-terminated UTF-32 encoded string.
  • size: Size of the string in bytes.


This command does not have any options or flags.


Example 1: Retrieving the length of a UTF-32 string

#include <linux/string.h>

int main() {
    const char *str = "Hello, world!";
    ssize_t size = function::kernel_string_utf32(str, strlen(str));
    printf("String length: %ld\n", size);
    return 0;

Example 2: Comparing two UTF-32 strings

#include <linux/string.h>

int main() {
    const char *str1 = "String 1";
    const char *str2 = "String 2";
    int result = function::kernel_string_utf32_cmp(str1, str2,
                                                   strlen(str1), strlen(str2));
    if (result == 0) {
        printf("Strings are equal\n");
    } else if (result > 0) {
        printf("String 1 is lexicographically greater than String 2\n");
    } else {
        printf("String 2 is lexicographically greater than String 1\n");
    return 0;

Common Issues

  • Ensure that the provided string is a valid UTF-32 string. Invalid strings may result in unexpected behavior.
  • Consider using the function::kernel_string_utf32_try function to handle potential errors gracefully.


The function::kernel_string_utf32 command can be integrated with other Linux commands or tools to perform advanced string processing tasks. For instance, it can be used in conjunction with the grep command to search for UTF-32 strings within files or pipelines.

Related Commands

  • function::kernel_string_utf16: Manipulates UTF-16 encoded strings in the kernel.
  • function::kernel_string_utf8: Manipulates UTF-8 encoded strings in the kernel.