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Issue of the Standard # S0008

Brief

Lack of details in requirements to __mempcpy() function.

Detailed Description

Specification of
ptr_t __mempcpy(ptr_t restrict dest, const ptr_t restrict src, size_t n );
does not describe function’s behavior in following cases:

• one or both of function parameters dest and src are NULL;
• parameter n is 0;
• dest and src point to the areas that overlap;
• dest and src to the same area.

Problem location(s) in the standard

Linux Standard Base Core Specification 3.1, Chapter 13. Base Libraries, 13.5. Interface Definitions for libc, description of function __mempcpy.

Possible consequences

Possible different behavior of applications on LSB-compliant implementations.

Possible solutions

Define function’s behavior in the above cases or state that the behavior is undefined (or implementation-defined).

References

No references to this issue found.

Accepted

LSB Bugzilla, 1297

Status

Fixed in LSB 4.0

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