strnul(3)                  Library Functions Manual                  strnul(3)

NAME
       strnul - string search NUL

LIBRARY
       gnulib - The GNU Portability Library

SYNOPSIS
       #include <string.h>

       char *strnul(char *s);
       const char *strnul(const char *s);

DESCRIPTION
       strnul() calculates the position of the terminating null byte ('\0') in
       the string pointed to by s.

       It is equivalent to both of the following expressions:

           s + strlen(s)
           strchr(s, '\0')

RETURN VALUE
       strnul() returns a pointer to the terminating null byte in the string
       pointed to by s.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |strnul ()                                   | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       GNU.

HISTORY
       gnulib 202607.

SEE ALSO
       strlen(3), strchr(3), string(3)

Linux man-pages 6.18              2026-02-25                         strnul(3)