strnlen(3) — Страница справочника Linux

strnlen(3)              Library Functions Manual              strnlen(3)

ИМЯ

       strnlen - determine the length of a fixed-size string

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <string.h>

       size_t strnlen(const char s[.maxlen], 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

ОПИСАНИЕ

       The strnlen() function returns the number of bytes in the string
       pointed to by s, excluding the terminating null byte ('\0'), 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-1].

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       The strnlen() function returns strlen(s), if that is less than
       maxlen, or maxlen if there is no null terminating ('\0') among
       the first maxlen characters pointed to by s.

АТРИБУТЫ

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ strnlen()                           │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

СТАНДАРТЫ

       POSIX.1-2008.

ИСТОРИЯ

       POSIX.1-2008.

СМОТРИТЕ ТАКЖЕ

       strlen(3)

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
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Linux man-pages 6.9.1          2024-06-15                     strnlen(3)

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