man3/memmove.3

   1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
   2 .\"
   3 .\" SPDX-License-Identifier: Linux-man-pages-copyleft
   4 .\"
   5 .\" References consulted:
   6 .\"     Linux libc source code
   7 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
   8 .\"     386BSD man pages
   9 .\" Modified Sat Jul 24 18:49:59 1993 by Rik Faith (faith@cs.unc.edu)
  10 .TH MEMMOVE 3  2021-03-22 "Linux man-pages (unreleased)" "Linux Programmer's Manual"
  11 .SH NAME
  12 memmove \- copy memory area
  13 .SH LIBRARY
  14 Standard C library
  15 .RI ( libc ", " \-lc )
  16 .SH SYNOPSIS
  17 .nf
  18 .B #include <string.h>
  19 .PP
  20 .BI "void *memmove(void *" dest ", const void *" src ", size_t " n );
  21 .fi
  22 .SH DESCRIPTION
  23 The
  24 .BR memmove ()
  25 function copies
  26 .I n
  27 bytes from memory area
  28 .I src
  29 to memory area
  30 .IR dest .
  31 The memory areas may overlap: copying takes place as though
  32 the bytes in
  33 .I src
  34 are first copied into a temporary array that does not overlap
  35 .I src
  36 or
  37 .IR dest ,
  38 and the bytes are then copied from the temporary array to
  39 .IR dest .
  40 .SH RETURN VALUE
  41 The
  42 .BR memmove ()
  43 function returns a pointer to
  44 .IR dest .
  45 .SH ATTRIBUTES
  46 For an explanation of the terms used in this section, see
  47 .BR attributes (7).
  48 .ad l
  49 .nh
  50 .TS
  51 allbox;
  52 lbx lb lb
  53 l l l.
  54 Interface       Attribute       Value
  55 T{
  56 .BR memmove ()
  57 T}      Thread safety   MT-Safe
  58 .TE
  59 .hy
  60 .ad
  61 .sp 1
  62 .SH STANDARDS
  63 POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
  64 .SH SEE ALSO
  65 .BR bcopy (3),
  66 .BR bstring (3),
  67 .BR memccpy (3),
  68 .BR memcpy (3),
  69 .BR strcpy (3),
  70 .BR strncpy (3),
  71 .BR wmemmove (3)