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Groups > gnu.bash.bug > #16723
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| From | Eli Schwartz <eschwartz@archlinux.org> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: process substitution error handling |
| Date | Thu, 6 Aug 2020 13:09:23 -0400 |
| Lines | 73 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.1037.1596733788.2739.bug-bash@gnu.org> (permalink) |
| References | <20200420051508.GA2359844@zx2c4.com> <7496b183-2db3-6c03-6074-928adcd08f45@case.edu> <CAHmME9pzOY_0EJ69y9wt6r-Jh3frZpV8XdFC6zG5EOkZ99h-1A@mail.gmail.com> <ac79e09f-b4e3-5368-87c1-b6e7147809e2@case.edu> <CAHmME9qNjO+LMxB8py2MDpS2Oprv1mRndgfTXQfXNWyHuwzmjg@mail.gmail.com> <9b358a76-4867-41b9-5a3a-c1892c76b8ee@case.edu> <CAHmME9qHEtsri_jYdqppSXwYFLH3Os06xS7wsM00z2dNgHgwyg@mail.gmail.com> <917bf529-d3cb-6783-326b-c7baa7ca9a2e@archlinux.org> <c87777d1-188f-8353-e646-24c64c243710@plushkava.net> <3eb8128c-6f15-473e-447a-5058aef52b9b@archlinux.org> |
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On 8/6/20 12:36 PM, kfm@plushkava.net wrote: > On 06/08/2020 17:21, Eli Schwartz wrote: >> On 8/6/20 11:31 AM, Jason A. Donenfeld wrote: >>> That doesn't always work: >>> >>> set -e >>> while read -r line; do >>> echo "$line" & >>> done < <(echo 1; sleep 1; echo 2; sleep 1; exit 77) >>> sleep 1 >>> wait $! >>> echo done > > I wonder why wait $! doesn't do the job here. Because `echo "$line" &` sets a new value for $! after the <() did. More to the point, you want to wait $! *before* running any commands in the while loop, because if the <() failed, it might not be a good idea to run those commands. -- Eli Schwartz Arch Linux Bug Wrangler and Trusted User
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Re: process substitution error handling Eli Schwartz <eschwartz@archlinux.org> - 2020-08-06 13:09 -0400
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