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Changes based on Thorsten's message #21581.

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This commit is contained in:
Wayne Davison 2005-08-09 07:08:45 +00:00
parent e0d0d9bfac
commit 2d97a73417
1 changed files with 15 additions and 9 deletions
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24
Doc/Zsh/builtins.yo
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@ -1154,15 +1154,24 @@ and for processes run from the shell.
findex(trap)
cindex(signals, trapping)
cindex(trapping signals)
item(tt(trap) [ var(arg) [ var(sig) ... ] ])(
item(tt(trap) [ var(arg) ] [ var(sig) ... ])(
var(arg) is a series of commands (usually quoted to protect it from
immediate evaluation by the shell) to be read and executed when the shell
receives var(sig). Each var(sig) can be given as a number,
receives any of the signals var(sig).
Each var(sig) can be given as a number,
or as the name of a signal either with or without the string tt(SIG)
in front.
If var(arg) is `tt(-)', then all traps var(sig) are reset to their
default values. If var(arg) is the empty string, then this signal
is ignored by the shell and by the commands it invokes.
If var(arg) is `tt(-)', then the specified signals are reset to their
defaults, or, if no var(sig) args are present, all traps are reset.
If var(arg) is an empty string, then the specified signals
are ignored by the shell (and by the commands it invokes).
If var(arg) is omitted but one or more var(sig) args are provided (i.e.
the first argument is a valid signal number or name), the effect is the
same as if var(arg) had been specified as `tt(-)'.
The tt(trap) command with no arguments prints a list of commands
associated with each signal.
If var(sig) is tt(ZERR) then var(arg) will be executed
after each command with a nonzero exit status. tt(ERR) is an alias
@ -1177,10 +1186,7 @@ If var(sig) is tt(0) or tt(EXIT)
and the tt(trap) statement is not executed inside the body of a function,
then the command var(arg) is executed when the shell terminates.
tt(ZERR), tt(DEBUG) and tt(EXIT) traps are not executed inside other traps.
The tt(trap) command with no arguments prints a list of commands
associated with each signal.
tt(ZERR), tt(DEBUG), and tt(EXIT) traps are not executed inside other traps.
Note that traps defined with the tt(trap) builtin are slightly different
from those defined as `tt(TRAP)var(NAL) () { ... }', as the latter have