strnlen3
Nonstring length
Usage
#include <string.h> // see memory.h(3head)
size_t strnlen(const char strn[], size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
strnlen():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
Library
Standard C library (libc, -lc)
Overview
This function determines the length of the character sequence contained in the array pointed to by strn.
If strn contains a string, the array can have less than n elements.
It is equivalent to
(memchr(strn, '\0', n) ?: strn + n) - strn
Return value
The strnlen() function returns the number of nonnull characters in strn.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| strnlen() | Thread safety | MT-Safe |
Releases
14 releases since Debian 2.2 (Potato); the text changed 13 times.