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|
function __trap_translate_signal
set upper (echo $argv[1]|tr a-z A-Z)
string replace -r '^SIG' '' -- $upper
end
function __trap_switch
switch $argv[1]
case EXIT
echo --on-process-exit %self
case '*'
echo --on-signal $argv[1]
end
end
function trap -d 'Perform an action when the shell receives a signal'
set -l mode
set -l cmd
set -l sig
set -l options
set -l longopt
set -l shortopt lph
if not getopt -T > /dev/null
# GNU getopt
set longopt print,help,list-signals
set options -o $shortopt -l $longopt --
# Verify options
if not getopt -n type $options $argv >/dev/null
return 1
end
else
# Old getopt, used on OS X
set options $shortopt
# Verify options
if not getopt $options $argv >/dev/null
return 1
end
end
# Do the real getopt invocation
set -l tmp (getopt $options $argv)
# Break tmp up into an array
set -l opt
eval set opt $tmp
while count $opt >/dev/null
switch $opt[1]
case -h --help
__fish_print_help trap
return 0
case -p --print
set mode print
case -l --list-signals
set mode list
case --
set -e opt[1]
break
end
set -e opt[1]
end
if not count $mode >/dev/null
switch (count $opt)
case 0
set mode print
case 1
set mode clear
case '*'
if test opt[1] = -
set -e opt[1]
set mode clear
else
set mode set
end
end
end
switch $mode
case clear
for i in $opt
set sig (__trap_translate_signal $i)
if test $sig
functions -e __trap_handler_$sig
end
end
case set
set -l cmd $opt[1]
set -e opt[1]
for i in $opt
set -l sig (__trap_translate_signal $i)
set sw (__trap_switch $sig)
if test $sig
eval "function __trap_handler_$sig $sw; $cmd; end"
else
return 1
end
end
case print
set -l names
if count $opt >/dev/null
set names $opt
else
set names (functions -na| string match "__trap_handler_*" | string replace '__trap_handler_' '')
end
for i in $names
set sig (__trap_translate_signal $i)
if test sig
functions __trap_handler_$i
else
return 1
end
end
case list
kill -l
end
end
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