From: Bart Schaefer <schaefer@brasslantern.com>
To: zsh-users@zsh.org
Subject: Re: trapped in bash
Date: Sun, 18 Dec 2016 18:30:56 -0800 [thread overview]
Message-ID: <161218183056.ZM5304@torch.brasslantern.com> (raw)
In-Reply-To: <20161219003219.GA21509@fujitsu.shahaf.local2>
On Dec 19, 12:32am, Daniel Shahaf wrote:
}
} I suppose you could write a command_not_found_handler() function that
} tried to reverse engineer _why_ the command wasn't found - with the
} obvious limitations, e.g., race conditions between the library's
} execution and the handler's.
I don't think there can be a race here because the handler won't be
invoked if the execve() hasn't already failed.
Something like this:
command_not_found_handler () {
local attempt="$1"
if [[ "$1" != /* && ( -o pathdirs || "$1
" != */* ) ]]
then
emulate zsh -c 'attempt=$^path/$1(N[1])'
fi
if [[ -f $attempt ]]
then
local hashbang
read -u 0 -k 2 hashbang < "$attempt"
case "$hashbang" in
('#!') print -u2 -- $1\: bad '#!' interpreter ;;
(*) print -u2 failed to load $1 ;;
esac
else
print -u2 -- $1\: no such file in \$PATH
fi
return 127
}
--
Barton E. Schaefer
next prev parent reply other threads:[~2016-12-19 2:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-16 15:33 Ray Andrews
2016-12-16 21:51 ` Aaron Schrab
2016-12-16 22:39 ` Ray Andrews
2016-12-16 23:05 ` Bart Schaefer
2016-12-17 20:27 ` Ray Andrews
2016-12-17 20:43 ` Bart Schaefer
2016-12-17 22:40 ` Ray Andrews
[not found] ` <5855BEF2.6090208__18199.534857604$1482015164$gmane$org@eastlink.ca>
2016-12-18 15:06 ` Daniel Shahaf
2016-12-18 15:54 ` Ray Andrews
2016-12-19 0:32 ` Daniel Shahaf
2016-12-19 2:30 ` Bart Schaefer [this message]
2016-12-19 4:29 ` Ray Andrews
2016-12-19 5:48 ` Bart Schaefer
2016-12-19 16:26 ` Ray Andrews
[not found] ` <ab7aeb33-d091-6602-8baa-cce92300d289__26556.3400615521$1482166729$gmane$org@eastlink.ca>
2016-12-19 17:47 ` Daniel Shahaf
2016-12-17 23:16 ` Jim
2016-12-17 23:38 ` Ray Andrews
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