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