- committed separately to make it easier to swap back if desired.
This version avoids open coding is_name() and isdigit() - measurements
show it is perhaps fractionally faster (though the difference is so small
as to probably be statistically insignifigant - if I were a statician
I might understand that) and just a little larger than the previous version.
closing PR bin/50958
That meant adding the assignment operators ('=', and all of the +=, *= ...)
Currently, ++, --, and ',' are not implemented (none of those are required
by posix) but support for them (most likely ',' first) might be added later.
To do this, I removed the yacc/lex arithmetic parser completely, and
replaced it with a hand written recursive descent parser, that I obtained
from FreeBSD, who earlier had obtained it from dash (Herbert Xu).
While doing the import, I cleaned up the sources (changed some file names
to avoid requiring a clean build, or signifigant surgery to the obj
directories if "build.sh -u" was to be used - "build.sh -u" should work
fine as it is now) removed some dashisms, applied some KNF, ...
Remove some unnecessary cuteness that limited error reporting.
Permit just one -s arg to fdflags
Be deterministic in the case of fdflags -s +cloexec,-cloexec 0
(and similar) - use the last specified, always.
Allow:
FD_0_FLAGS=$( fdflags -v 0 )
# do stuff, manipulating the flags
fdflags -s "FD_0_FLAGS" 0
to save/restore flags for a fd.
Correctly mask result of fcntl(fd, F_GETFD) with FD_CLOEXEC as the
specs require before deciding close on exec is set.
Improve portability as a tool, don't assume strtoi(), nor __arraycount()
and avoid needlessly requiring recent C versions (ie: there's no need to
sprinkle declarations in the middle of the code, it just makes them hard
to find, and benefits nothing.)
Still to do: As currently implemented, both user, and shell internal fds
are reported, and can be manipulated. Allowing users to touch the shell's
internal fds is bogus, and providing this easy way to allow users to
discover which values they have is poor. Fixing this means getting rid
of the use of fcntl(F_MAXFD) and replacing it with a shell maintained
memory of what fds the user (script) has allocated. The shell's fd
manipulation really still needs major work (including properly fixing
bin/48875)
From the POSIX time.h man page:
"The formal definition of UTC does not permit double leap seconds, so all mention of double leap seconds has been removed, and the range shortened from the former [0,61] seconds seen in previous versions of POSIX."
Move email addresses to same line as author name.
Do not split the third author entry on to a new line.
Public domain is not licensed by definition, heads up by Robert Elz.
kre