bcopy(3)

bcopy3

Byte copy

Usage

#include <strings.h>

[[deprecated]] void bcopy(size_t n; const void src[n], void dest[n], size_t n);

Library

Standard C library (libc, -lc)

Overview

The bcopy() function copies n bytes from src to dest. The result is correct, even when both areas overlap.

Return value

None.

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
bcopy()Thread safetyMT-Safe

Releases

19 releases since Debian 1.1 (Buzz); the text changed 15 times.

  1. 1.1–1.2
  2. 1.3–2.0
  3. 2.1–2.2
  4. 3.0
  5. 3.1
  6. 4.0
  7. 5.0
  8. 6.0
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. Arch

Standards

None.

History

4.3BSD.

Marked as LEGACY in POSIX.1-2001: use memcpy(3) or memmove(3) in new programs. Note that the first two arguments are interchanged for memcpy(3) and memmove(3). POSIX.1-2008 removes the specification of bcopy().

From man-pages 6.19-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.