Greetings, Brian Inglis via Cygwin! > On 2023-04-06 06:21, Andrey Repin via Cygwin wrote: >>> I have a "hash bang" bash shell script i.e. first line >>> #! /bin/sh >>> or equivalently >>> #! /bin/bash
>> By default, sh is bash in base Cygwin installation. >>> Q3 - at 1/8 the size of bash and sh, I am not at all sure of the role and >>> reach of dash. >>> Should the edit (dash replacing bash/sh) be incorporated elsewhere or would >>> this be a >>> bad idea (and retained only locally in what is indeed an eccentric and >>> one-off context)? >> I'm replacing /bin/sh with dash as I've found that even in POSIX mode, bash >> allows for a lot of bash'izms in scripts, which would not otherwise run under >> (d?a)?sh. >> See the post-install script attached. > You should use either a hard link or copy of d/ash from/to /bin/ to allow > it (or any shell) to be used from Windows cmd shells or Scheduled Tasks, That depends on your setup. /usr/bin/env is a real executable and it is a VERY good idea to handle Windows associations through it. But on my end it is covered by CYGWIN=winsymlinks:nativestrict and a more elaborate TCC-RT wrapper script which is again falling down to /usr/bin/env for the purposes of actually starting the program, be it a script or binary or… > which do not recognise Cygwin /usr mounts or symlinks, but can be run with > elevated privileges and at sometimes more useful points than user cron jobs. > For example, "manually" restarting Cygwin services after delayed startup, > stopping Cygwin services and processes before upgrades, and cleaning up cron > jobs that have not finished. That part is handled elsewhere already. > You should also consider changing the sh man page. That's a good idea, thanks. I never did "man sh" so never stumbled across that discrepancy. -- With best regards, Andrey Repin Saturday, April 8, 2023 11:31:34 Sorry for my terrible english... -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
