Re: List of packages shipping shell scripts with bashisms + MBF proposal
On Sat, Feb 09, 2008 at 04:39:11PM -0800, Russ Allbery wrote:
> This one is somewhat arguable. Pure POSIX doesn't allow signal numbers,
> but the XSI extension to POSIX does and dash and posh both support them.
> We do not, in general, accept XSI extensions, but it's hard to argue
> strongly for excluding a feature that even posh supports.
Since 0.5.6, it does not; the only number it understands is the
pseudo-signal 0, mandated by POSIX.
The reason POSIX doesn't allow numbers is that they are inconsistent
from platform to platform. People who learn signals on a commercial OS
of yore sometimes assume that signal 5 means something other than
SIGTRAP on Debian, and script traps and kills that end up not doing what
is intended.
When the names are used, this confusion is avoided.
Reply to: