man3/memset.3

   1 '\" t
   2 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
   3 .\"
   4 .\" SPDX-License-Identifier: Linux-man-pages-copyleft
   5 .\"
   6 .\" References consulted:
   7 .\"     Linux libc source code
   8 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
   9 .\"     386BSD man pages
  10 .\" Modified Sat Jul 24 18:49:23 1993 by Rik Faith (faith@cs.unc.edu)
  11 .TH memset 3 (date) "Linux man-pages (unreleased)"
  12 .SH NAME
  13 memset \- fill memory with a constant byte
  14 .SH LIBRARY
  15 Standard C library
  16 .RI ( libc ", " \-lc )
  17 .SH SYNOPSIS
  18 .nf
  19 .B #include <string.h>
  20 .PP
  21 .BI "void *memset(void " s [. n "], int " c ", size_t " n );
  22 .fi
  23 .SH DESCRIPTION
  24 The
  25 .BR memset ()
  26 function fills the first
  27 .I n
  28 bytes of the
  29 memory area pointed to by
  30 .I s
  31 with the constant byte
  32 .IR c .
  33 .SH RETURN VALUE
  34 The
  35 .BR memset ()
  36 function returns a pointer to the memory area
  37 .IR s .
  38 .SH ATTRIBUTES
  39 For an explanation of the terms used in this section, see
  40 .BR attributes (7).
  41 .ad l
  42 .nh
  43 .TS
  44 allbox;
  45 lbx lb lb
  46 l l l.
  47 Interface       Attribute       Value
  48 T{
  49 .BR memset ()
  50 T}      Thread safety   MT-Safe
  51 .TE
  52 .hy
  53 .ad
  54 .sp 1
  55 .SH STANDARDS
  56 C11, POSIX.1-2008.
  57 .SH HISTORY
  58 POSIX.1-2001, C89, SVr4, 4.3BSD.
  59 .SH SEE ALSO
  60 .BR bstring (3),
  61 .BR bzero (3),
  62 .BR swab (3),
  63 .BR wmemset (3)