NAME

       strstr - find a substring

SYNOPSIS

       #include <string.h>

       char *strstr(const char *s1, const char *s2);

DESCRIPTION

       The  strstr() function shall locate the first occurrence in the string pointed to by s1 of
       the sequence of bytes (excluding the terminating null byte) in the string  pointed  to  by
       s2.

RETURN VALUE

       Upon  successful  completion,  strstr()  shall return a pointer to the located string or a
       null pointer if the string is not found.

       If s2 points to a string with zero length, the function shall return s1.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       strchr() , the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2003  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard,  the  original  IEEE  and  The  Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .