STRLEN(3P)						     POSIX Programmer's Manual							STRLEN(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       strlen - get string length

SYNOPSIS

       #include <string.h>

       size_t strlen(const char *s);

DESCRIPTION

       The strlen() function shall compute the number of bytes in the string to which s points, not including the terminating null byte.

RETURN VALUE

       The strlen() function shall return the length of s; no return value shall be reserved to indicate an error.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

   Getting String Lengths
       The following example sets the maximum length of key and data by using strlen() to get the lengths of those strings.

	      #include <string.h>
	      ...
	      struct element {
		  char *key;
		  char *data;
	      };
	      ...
	      char *key, *data;
	      int len;

	      *keylength = *datalength = 0;
	      ...
	      if ((len = strlen(key)) > *keylength)
		  *keylength = len;
	      if ((len = strlen(data)) > *datalength)
		  *datalength = len;
	      ...

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       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 Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003								STRLEN(3P)