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¶

#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 .