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strlen(3) [x11r4 man page]

STRLEN(3)						     Linux Programmer's Manual							 STRLEN(3)

NAME
strlen - calculate the length of a string SYNOPSIS
#include <string.h> size_t strlen(const char *s); DESCRIPTION
The strlen() function calculates the length of the string pointed to by s, excluding the terminating null byte (''). RETURN VALUE
The strlen() function returns the number of characters in the string pointed to by s. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |strlen() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD. SEE ALSO
string(3), strnlen(3), wcslen(3), wcsnlen(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2016-03-15 STRLEN(3)

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STRNLEN(3)                                                   Linux Programmer's Manual                                                  STRNLEN(3)

NAME
strnlen - determine the length of a fixed-size string SYNOPSIS
#include <string.h> size_t strnlen(const char *s, size_t maxlen); 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 DESCRIPTION
The strnlen() function returns the number of characters in the string pointed to by s, excluding the terminating null byte (''), but at most maxlen. In doing this, strnlen() looks only at the first maxlen characters in the string pointed to by s and never beyond s+maxlen. RETURN VALUE
The strnlen() function returns strlen(s), if that is less than maxlen, or maxlen if there is no null terminating ('') among the first maxlen characters pointed to by s. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |strnlen() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2008. SEE ALSO
strlen(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU 2016-03-15 STRNLEN(3)
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