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50 lines
1.2 KiB
50 lines
1.2 KiB
# |
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# Provides for the trapping of UNIX signals and the calling of multiple |
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# registered functions when a trap is triggered. |
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# |
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# Authors: |
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# Sorin Ionescu <sorin.ionescu@gmail.com> |
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# |
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# Trap signals were generated with 'kill -l'. |
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# DEBUG, EXIT, and ZERR are Zsh signals. |
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_trap_signals=( |
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ABRT ALRM BUS CHLD CONT EMT FPE HUP ILL INFO INT IO KILL PIPE PROF QUIT |
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SEGV STOP SYS TERM TRAP TSTP TTIN TTOU URG USR1 USR2 VTALRM WINCH XCPU XFSZ |
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DEBUG EXIT ZERR |
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) |
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# Adds a function name to a list to be called when a trap is triggered. |
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function add-zsh-trap { |
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if (( $# < 2 )); then |
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print "usage: $0 type function" >&2 |
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return 1 |
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fi |
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if [[ -z "$_trap_signals[(r)$1]" ]]; then |
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print "$0: unknown signal: $1" >&2 |
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return 1 |
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fi |
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local trap_functions="TRAP${1}_FUNCTIONS" |
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if (( ! ${(P)+trap_functions} )); then |
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typeset -gaU "$trap_functions" |
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fi |
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eval "$trap_functions+="$2"" |
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if (( ! $+functions[TRAP${1}] )); then |
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eval " |
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function TRAP${1} { |
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for trap_function in \"\$TRAP${1}_FUNCTIONS[@]\"; do |
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if (( \$+functions[\$trap_function] )); then |
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\"\$trap_function\" \"\$1\" |
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fi |
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done |
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return \$(( 128 + \$1 )) |
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} |
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" |
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fi |
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} |
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add-zsh-trap "$@" |
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