any current standing point of 'ipc can not be done' alike whatsoever wont be standing for too long in any case, just a question of time
On Sun, Oct 10, 2021 at 2:06 PM Alex fxmbsw7 Ratchev <fxmb...@gmail.com> wrote: > > maybe the same way to implent here a fix may do IPC between bashes ? > a meta database of stuff used in scripts, then if exec reset meta'ly > to none ( undo em maybe .. i have to figure such for my bashlinker > project too ) and if that fails restore em back > the same meta db can be used in IPC somehowly.. important feature, i > bet in 20 - 40 years there wont be bash without IPC, too bad it takes > so long.. > > is it cause posix isnt so far specifying everything for you ? > > On Fri, Oct 8, 2021 at 8:34 PM Mark March <ma...@systempad.org> wrote: > > > > >I'll look at changing that > > > > Thank you. I agree, making traps behave the same after an exec failure as > > after any other failed builtin is a better course of action. It will make > > the trap facility stronger. execve failures are not that uncommon, and are > > hard to predict in advance. execve(2) man page lists 24 failure conditions! > > Since they can't predict exec failures, scripts that use traps and must > > handle exec failures will have to save the traps before pretty much every > > call to exec that takes a command name. This is quite a bit of work to put > > on bash users. On the other hand, not doing this will lead to subtle bugs > > where cleanup code will suddenly not run, or processes unexpectedly catch > > signals that have been previously blocked. > > > > -Mark > > > > > > > > On Friday, October 8, 2021, 08:02:31 AM PDT, Chet Ramey > > <chet.ra...@case.edu> wrote: > > > > > > > > > > > > On 10/1/21 2:16 PM, Mark March wrote: > > > Ok, thank you for clarifying. There is nothing in the documentation about > > > this behavior as far as I can tell. I would suggest adding a line about > > > traps getting reset after a failed exec to the paragraph on 'execfail'. > > > > I think it will be a cleaner fix, and more intuitive, to make sure the > > traps are preserved across a failed `exec'. I'll look at changing that > > > > behavior. > > > > Chet > > > > -- > > ``The lyf so short, the craft so long to lerne.'' - Chaucer > > ``Ars longa, vita brevis'' - Hippocrates > > Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/ > > > >
