NAME
strnlen - determine the length of a fixed-size string SYNOPSIS
#include
sizet strnlen(const char *s, sizet maxlen); Feature Test Macro Requirements for glibc (see featuretestmacros(7)): strnlen(): Since glibc 2.10: XOPENSOURCE >= 700 || POSIXCSOURCE >= 200809L Before glibc 2.10: GNUSOURCE DESCRIPTION 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 bytes at 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 byte ('\0') among the first maxlen bytes 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
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GNU 2012-05-10 STRNLEN(3)