strnstr man page on Alpinelinux

strnstr man page on Alpinelinux

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STRSTR(3)		 BSD Library Functions Manual		     STRSTR(3)

NAME
     strnstr — locate a substring in a string

LIBRARY
     Utility functions from BSD systems (libbsd, -lbsd)

SYNOPSIS
     #include <bsd/string.h>

     char *
     strnstr(const char *big, const char *little, size_t len);

DESCRIPTION
     The strnstr() function locates the first occurrence of the null-termi‐
     nated 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)

BSD			       October 11, 2001				   BSD

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