strstr(3bsd)                         3bsd                         strstr(3bsd)

NAME
     strnstr - locate a substring in a string

LIBRARY
     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 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
     strstr(3), strcasestr(3), memchr(3), memmem(3), strchr(3), strcspn(3),
     strpbrk(3), strrchr(3), strsep(3), strspn(3), strtok(3), wcsstr(3)

HISTORY
     The strnstr() function originated in FreeBSD.

Linux 6.8.7-arch1-1            October 11, 2001            Linux 6.8.7-arch1-1