Emulate 127 exit code for command not found
commit5db25b655eb011b6b12d381007e1eb091bf0bc74
authorOlly Betts <olly@survex.com>
Sun, 22 Oct 2017 21:27:13 +0000 (23 10:27 +1300)
committerOlly Betts <olly@survex.com>
Sun, 22 Oct 2017 21:27:13 +0000 (23 10:27 +1300)
treec95fa609b6cbf36216e5045aa26014eeb6c0aa6b
parent2be394420ce4de9b6e6477c75aa15cedf56f9588
Emulate 127 exit code for command not found

The shell exits with code 127 to mean "command not found" and we
check for this and throw NoSuchFilter, so emulate this when we avoid
using a shell.  Noted by Gaurav Arora.
xapian-applications/omega/runfilter.cc