strnstr3bsd
Locate a substring in a string
Usage
#include <string.h>
(See libbsd(7) for include usage.)
char *
strnstr(const char *big, const char *little, size_t len);
Library
library “libbsd”
Overview
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. Since the strnstr() function is a FreeBSD specific API, it should only be used when portability is not a concern.
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);
Releases
5 releases since Debian 10 (Buster); the text changed 3 times.