| '\" t |
| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
| .\" |
| .\" References consulted: |
| .\" Linux libc source code |
| .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) |
| .\" 386BSD man pages |
| .\" Modified Sat Jul 24 18:49:23 1993 by Rik Faith (faith@cs.unc.edu) |
| .TH memset 3 (date) "Linux man-pages (unreleased)" |
| .SH NAME |
| memset \- fill memory with a constant byte |
| .SH LIBRARY |
| Standard C library |
| .RI ( libc ,\~ \-lc ) |
| .SH SYNOPSIS |
| .nf |
| .B #include <string.h> |
| .P |
| .BI "void *memset(void " s [. n "], int " c ", size_t " n ); |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR memset () |
| function fills the first |
| .I n |
| bytes of the |
| memory area pointed to by |
| .I s |
| with the constant byte |
| .IR c . |
| .SH RETURN VALUE |
| The |
| .BR memset () |
| function returns a pointer to the memory area |
| .IR s . |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .na |
| .nh |
| .BR memset () |
| T} Thread safety MT-Safe |
| .TE |
| .SH STANDARDS |
| C11, POSIX.1-2008. |
| .SH HISTORY |
| POSIX.1-2001, C89, SVr4, 4.3BSD. |
| .SH SEE ALSO |
| .BR bstring (3), |
| .BR bzero (3), |
| .BR swab (3), |
| .BR wmemset (3) |
