STRLEN(3)              FreeBSD Library Functions Manual              STRLEN(3)

NAME

     strlen, strnlen - find length of string

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <string.h>

     size_t
     strlen(const char *s);

     size_t
     strnlen(const char *s, size_t maxlen);

DESCRIPTION

     The strlen() function computes the length of the string s.  The strnlen()
     function attempts to compute the length of s, but never scans beyond the
     first maxlen bytes of s.

RETURN VALUES

     The strlen() function returns the number of characters that precede the
     terminating NUL character.  The strnlen() function returns either the
     same result as strlen() or maxlen, whichever is smaller.

SEE ALSO

     string(3), wcslen(3), wcswidth(3)

STANDARDS

     The strlen() function conforms to ISO/IEC 9899:1990 ("ISO C90").  The
     strnlen() function conforms to IEEE Std 1003.1-2008 ("POSIX.1").

HISTORY

     The strlen() function first appeared in the Programmer's Workbench
     (PWB/UNIX) and was ported to Version 7 AT&T UNIX.  The strnlen() function
     first appeared in FreeBSD 8.0, OpenBSD 4.8, and NetBSD 6.0.

FreeBSD 15.1-STABLE-HBSD         April 3, 2022                       STRLEN(3)