rawmemchr(3)               Library Functions Manual               rawmemchr(3)

NAME
       rawmemchr - memory raw search character

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #define _GNU_SOURCE  /* See feature_test_macros(7) */
       #include <string.h>

       [[deprecated]] void *rawmemchr(const void *s, int c);

DESCRIPTION
       The rawmemchr() function is similar to memchr(), but it assumes (i.e.,
       the programmer knows for certain) that an instance of c lies somewhere
       in the memory area starting at the location pointed to by s.

       If an instance of c is not found, the behavior is undefined.  Use
       either strlen(3) or memchr(3) instead.

RETURN VALUE
       The rawmemchr() function returns a pointer to the matching byte.

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

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

HISTORY
       glibc 2.1.

SEE ALSO
       memchr(3), strlen(3), strnul(3)

Linux man-pages 6.19              2026-02-25                      rawmemchr(3)