1STRLEN(3P)                 POSIX Programmer's Manual                STRLEN(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       strlen - get string length
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SYNOPSIS

15       #include <string.h>
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17       size_t strlen(const char *s);
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DESCRIPTION

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

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

29       No errors are defined.
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31       The following sections are informative.
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EXAMPLES

34   Getting String Lengths
35       The following example sets the maximum length of key and data by  using
36       strlen() to get the lengths of those strings.
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39              #include <string.h>
40              ...
41              struct element {
42                  char *key;
43                  char *data;
44              };
45              ...
46              char *key, *data;
47              int len;
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50              *keylength = *datalength = 0;
51              ...
52              if ((len = strlen(key)) > *keylength)
53                  *keylength = len;
54              if ((len = strlen(data)) > *datalength)
55                  *datalength = len;
56              ...
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APPLICATION USAGE

59       None.
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RATIONALE

62       None.
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FUTURE DIRECTIONS

65       None.
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SEE ALSO

68       The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>
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71       Portions  of  this text are reprinted and reproduced in electronic form
72       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
73       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
74       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
75       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
76       event of any discrepancy between this version and the original IEEE and
77       The  Open Group Standard, the original IEEE and The Open Group Standard
78       is the referee document. The original Standard can be  obtained  online
79       at http://www.opengroup.org/unix/online.html .
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83IEEE/The Open Group                  2003                           STRLEN(3P)
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