Bug 33298
| Summary: | memcpy(3) could suggest memmove for overlapping copies | ||
|---|---|---|---|
| Product: | Documentation | Reporter: | Tim J. Robbins <tim> |
| Component: | Books & Articles | Assignee: | freebsd-doc (Nobody) <doc> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | Latest | ||
| Hardware: | Any | ||
| OS: | Any | ||
State Changed From-To: open->closed applied, thanks. |
From memcpy(3): BUGS In this implementation memcpy() is implemented using bcopy(3), and there- fore the strings may overlap. On other systems, copying overlapping strings may produce surprises. A simpler solution is to not use memcpy(). Using memmove() is simpler than not using memcpy(). Fix: .. or something to that effect.--XyW2VBaR9wNH3h8wJETuFrpohvj1XufeDSGXpgzp6NfFEnzK Content-Type: text/plain; name="file.diff" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="file.diff" --- memcpy.3.old Sun Dec 30 00:55:49 2001 +++ memcpy.3 Sun Dec 30 00:59:20 2001 @@ -82,5 +82,10 @@ .Xr bcopy 3 , and therefore the strings may overlap. On other systems, copying overlapping strings may produce surprises. -A simpler solution is to not use -.Fn memcpy . +Programs intended to be portable should use +.Fn memmove +when +.Fa src +and +.Fa dst +may overlap. How-To-Repeat: man 3 memcpy