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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  corresponding
       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 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 .

IEEE/The Open Group                  2003                           STRLEN(3P)