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 <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 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.

     While the strcasestr() function uses the current locale, the
     strcasestr_l() function may be passed a locale directly. See xlocale(3)
     for more information.

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

BSD                            October 11, 2001                            BSD