1STRNLEN(3)                 Linux Programmer's Manual                STRNLEN(3)
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NAME

6       strnlen - determine the length of a fixed-size string
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SYNOPSIS

9       #include <string.h>
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11       size_t strnlen(const char *s, size_t maxlen);
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13   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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15       strnlen():
16           Since glibc 2.10:
17               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
18           Before glibc 2.10:
19               _GNU_SOURCE
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DESCRIPTION

22       The  strnlen()  function  returns  the  number  of  bytes in the string
23       pointed to by s, excluding the terminating null  byte  ('\0'),  but  at
24       most  maxlen.   In doing this, strnlen() looks only at the first maxlen
25       bytes at s and never beyond s+maxlen.
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RETURN VALUE

28       The strnlen() function returns strlen(s), if that is less than  maxlen,
29       or  maxlen if there is no null byte ('\0') among the first maxlen bytes
30       pointed to by s.
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CONFORMING TO

33       POSIX.1-2008.
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SEE ALSO

36       strlen(3)
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COLOPHON

39       This page is part of release 3.53 of the Linux  man-pages  project.   A
40       description  of  the project, and information about reporting bugs, can
41       be found at http://www.kernel.org/doc/man-pages/.
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45GNU                               2012-05-10                        STRNLEN(3)
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