/usr/share/fish/functions/psub.fish is in fish-common 2.2.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | function psub --description "Read from stdin into a file and output the filename. Remove the file when the command that called psub exits."
set -l filename
set -l funcname
set -l use_fifo 1
set -l shortopt -o hf
set -l longopt -l help,file
if getopt -T >/dev/null
set longopt
end
if not getopt -n psub -Q $shortopt $longopt -- $argv >/dev/null
return 1
end
set -l tmp (getopt $shortopt $longopt -- $argv)
eval set opt $tmp
while count $opt >/dev/null
switch $opt[1]
case -h --help
__fish_print_help psub
return 0
case -f --file
set use_fifo 0
case --
set -e opt[1]
break
end
set -e opt[1]
end
if not status --is-command-substitution
echo psub: Not inside of command substitution >&2
return 1
end
set -l TMPDIR $TMPDIR
if test -z "$TMPDIR[1]"
set TMPDIR /tmp
end
if test use_fifo = 1
# Write output to pipe. This needs to be done in the background so
# that the command substitution exits without needing to wait for
# all the commands to exit
set dir (mktemp -d "$TMPDIR[1]"/.psub.XXXXXXXXXX); or return
set filename $dir/psub.fifo
mkfifo $filename
cat >$filename &
else
set filename (mktemp "$TMPDIR[1]"/.psub.XXXXXXXXXX)
cat >$filename
end
# Write filename to stdout
echo $filename
# Find unique function name
while true
set funcname __fish_psub_(random);
if not functions $funcname >/dev/null ^/dev/null
break;
end
end
# Make sure we erase file when caller exits
function $funcname --on-job-exit caller --inherit-variable filename --inherit-variable funcname
command rm $filename
functions -e $funcname
end
end
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