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Issue of the Standard # S0807

Brief

LSB sysconf specification is not safe relative to POSIX update

Detailed Description

LSB sysconf specification refers POSIX-2004 that reads:

_POSIX_ADVISORY_INFO
    The implementation supports the Advisory Information option.
    If this symbol is defined in <unistd.h>, it shall be
    defined to be -1, 0, or 200112L. The value of this symbol
    reported by sysconf() shall either be -1 or 200112L.

At the same POSIX-2008 reads as follows:

_POSIX_ADVISORY_INFO
    The implementation supports the Advisory Information option. 
    If this symbol is defined in <unistd.h>, it shall be
    defined to be -1, 0, or 200809L. The value of this symbol 
    reported by sysconf() shall either be -1 or 200809L.

glibc since version 2.10 has been already switched to the new POSIX, so values returned by sysconf() on leading edge distributions contradicts to formal LSB requirements.

Problem location(s) in the standard

Linux Standard Base Core Specification 4.0

Accepted

LSB Bugzilla, 2701

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