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STRSTR(3)	       FreeBSD Library Functions Manual		     STRSTR(3)

NAME
     strstr, strcasestr, strnstr -- locate a substring in a string

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <string.h>

     char *
     strstr(const char *big, const char	*little);

     char *
     strcasestr(const char *big, const char *little);

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

     #include <string.h>
     #include <xlocale.h>

     char *
     strcasestr_l(const	char *big, const char *little, locale_t	loc);

DESCRIPTION
     The strstr() function locates the first occurrence	of the null-terminated
     string little in the null-terminated string big.

     The strcasestr() function is similar to strstr(), but ignores the case of
     both strings.

     The strcasestr_l()	function does the same as strcasestr() but takes an
     explicit locale rather than using the current locale.

     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 the "Bar Baz" portion of
     largestring:

	   const char *largestring = "Foo Bar Baz";
	   const char *smallstring = "Bar";
	   char	*ptr;

	   ptr = strstr(largestring, smallstring);

     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(3),	memmem(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3),
     strsep(3),	strspn(3), strtok(3), wcsstr(3)

STANDARDS
     The strstr() function conforms to ISO/IEC 9899:1990 (``ISO	C90'').

FreeBSD	9.3		       October 11, 2001			   FreeBSD 9.3

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | EXAMPLES | SEE ALSO | STANDARDS

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