mirror of https://github.com/mkerrisk/man-pages
67 lines
2.1 KiB
Plaintext
67 lines
2.1 KiB
Plaintext
|
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
|
||
|
.TH "STRNCPY" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
|
||
|
.\" strncpy
|
||
|
.SH NAME
|
||
|
strncpy \- copy part of a string
|
||
|
.SH SYNOPSIS
|
||
|
.LP
|
||
|
\fB#include <string.h>
|
||
|
.br
|
||
|
.sp
|
||
|
char *strncpy(char *restrict\fP \fIs1\fP\fB, const char *restrict\fP
|
||
|
\fIs2\fP\fB, size_t\fP \fIn\fP\fB);
|
||
|
.br
|
||
|
\fP
|
||
|
.SH DESCRIPTION
|
||
|
.LP
|
||
|
The \fIstrncpy\fP() function shall copy not more than \fIn\fP bytes
|
||
|
(bytes that follow a null byte are not copied) from the
|
||
|
array pointed to by \fIs2\fP to the array pointed to by \fIs1\fP.
|
||
|
If copying takes place between objects that overlap, the
|
||
|
behavior is undefined.
|
||
|
.LP
|
||
|
If the array pointed to by \fIs2\fP is a string that is shorter than
|
||
|
\fIn\fP bytes, null bytes shall be appended to the copy
|
||
|
in the array pointed to by \fIs1\fP, until \fIn\fP bytes in all are
|
||
|
written.
|
||
|
.SH RETURN VALUE
|
||
|
.LP
|
||
|
The \fIstrncpy\fP() function shall return \fIs1\fP; no return value
|
||
|
is reserved to indicate an error.
|
||
|
.SH ERRORS
|
||
|
.LP
|
||
|
No errors are defined.
|
||
|
.LP
|
||
|
\fIThe following sections are informative.\fP
|
||
|
.SH EXAMPLES
|
||
|
.LP
|
||
|
None.
|
||
|
.SH APPLICATION USAGE
|
||
|
.LP
|
||
|
Character movement is performed differently in different implementations.
|
||
|
Thus, overlapping moves may yield surprises.
|
||
|
.LP
|
||
|
If there is no null byte in the first \fIn\fP bytes of the array pointed
|
||
|
to by \fIs2\fP, the result is not
|
||
|
null-terminated.
|
||
|
.SH RATIONALE
|
||
|
.LP
|
||
|
None.
|
||
|
.SH FUTURE DIRECTIONS
|
||
|
.LP
|
||
|
None.
|
||
|
.SH SEE ALSO
|
||
|
.LP
|
||
|
\fIstrcpy\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
|
||
|
\fI<string.h>\fP
|
||
|
.SH 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 .
|