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67 lines
2.1 KiB
Plaintext
67 lines
2.1 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "STRNCPY" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" strncpy
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.SH NAME
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strncpy \- copy part of a string
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.SH SYNOPSIS
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.LP
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\fB#include <string.h>
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.br
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.sp
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char *strncpy(char *restrict\fP \fIs1\fP\fB, const char *restrict\fP
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\fIs2\fP\fB, size_t\fP \fIn\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIstrncpy\fP() function shall copy not more than \fIn\fP bytes
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(bytes that follow a null byte are not copied) from the
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array pointed to by \fIs2\fP to the array pointed to by \fIs1\fP.
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If copying takes place between objects that overlap, the
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behavior is undefined.
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.LP
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If the array pointed to by \fIs2\fP is a string that is shorter than
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\fIn\fP bytes, null bytes shall be appended to the copy
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in the array pointed to by \fIs1\fP, until \fIn\fP bytes in all are
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written.
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.SH RETURN VALUE
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.LP
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The \fIstrncpy\fP() function shall return \fIs1\fP; no return value
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is reserved to indicate an error.
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.SH ERRORS
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.LP
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No errors are defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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Character movement is performed differently in different implementations.
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Thus, overlapping moves may yield surprises.
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.LP
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If there is no null byte in the first \fIn\fP bytes of the array pointed
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to by \fIs2\fP, the result is not
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null-terminated.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIstrcpy\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
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\fI<string.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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