NAME
strnstr — locate a substring in a stringLIBRARY
library “libbsd”SYNOPSIS
#include <string.h> (See libbsd(7) for include usage.)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. 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 toNULL
, 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
strstr(3), strcasestr(3), memchr(3), memmem(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strtok(3), wcsstr(3)October 11, 2001 | Debian |