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Command: strnstr | Section: 9 | Source: OpenBSD | File: strnstr.9
STRNSTR(9) FreeBSD Kernel Developer's Manual STRNSTR(9)
NAME
strnstr - locate a substring in a string
SYNOPSIS
#include <lib/libkern/libkern.h>
char *
strnstr(const char *big, const char *little, size_t len);
DESCRIPTION
The strnstr() function locates the first occurrence of the null-
terminated string little in the string big, where not more than len
characters are searched. Characters that appear after a `\0' character
are not searched.
RETURN VALUES
If little is an empty string, big is returned; if little occurs nowhere
in big, NULL is returned; otherwise a pointer to the first character of
the first occurrence of little is returned.
EXAMPLES
The following sets the pointer ptr to NULL, because only the first 4
characters of largestring are searched:
const char *largestring = "Foo Bar Baz";
const char *smallstring = "Bar";
char *ptr;
ptr = strnstr(largestring, smallstring, 4);
SEE ALSO
memchr(9)
FreeBSD 14.1-RELEASE-p8 December 21, 2023 FreeBSD 14.1-RELEASE-p8