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Sun, 25 Feb 2024 14:45:07 -0800 (PST) MIME-Version: 1.0 References: <73696-1708812060.096751@IRYQ.G6d0.hkDI> In-Reply-To: <73696-1708812060.096751@IRYQ.G6d0.hkDI> From: Bart Schaefer Date: Sun, 25 Feb 2024 14:44:55 -0800 Message-ID: Subject: Re: PATCH: real-time signals support To: Oliver Kiddle Cc: Zsh workers Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 52613 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: On Sat, Feb 24, 2024 at 2:01=E2=80=AFPM Oliver Kiddle wrote: > > For consistency with ksh and bash, the naming is RTMIN, RTMIN+1 ... > RTMAX-1, RTMAX. This means that each signal has an alternate name > so on my system, RTMIN+31 is an alternate name for RTMAX-30. > > The patch also adds a -L option to kill similar to bash and ksh which > prints signals with their numbers as a table. It looks as if "kill -L" chooses the name with the smallest "absolute value= "? Some suggestions RE -L: * Drop the right-paren after the signal number, so this output is easily pa= rsed. * List in columns first rather than across rows. * Recognize terminal width and change number of columns. * Print one column (of number-name pairs, obviously) if output is not a terminal. I know the "N) NAME" format is bash-reminiscent, but bash also puts the "SIG" prefix on every name which this already does not. Anyway two of those three suggestions are clearly a moderate amount of extra effort, so just throwing out there. > On many systems, the > real-time signals are not numbered contiguously with the earlier > signals. Does this mean we should consider making $signals an associative array like $history? That would remove the issue that $signals[2] =3D HUP, etc., but maybe that's a backward-compat problem. > Prior to this patch, kill -l uses the WIFSIGNALED and WTERMSIG > macros to convert a return status to the corresponding signal. But > zsh simply ORs the status with 0200 (128). So surely we need to > look for that instead? Does that mean that Functions/Misc/zargs needs to change the way it interprets exit status? There is a presumption that 129+ is "killed by signal", that 255 is special, and that otherwise 254 is the largest possible exit status.