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Imported from ../bash-3.0.tar.gz.

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This commit is contained in:
Jari Aalto 2004-07-27 13:29:18 +00:00
commit b80f6443b6
400 changed files with 69247 additions and 13346 deletions
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50
builtins/trap.def
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@ -1,7 +1,7 @@
This file is trap.def, from which is created trap.c.
It implements the builtin "trap" in Bash.
Copyright (C) 1987-2002 Free Software Foundation, Inc.
Copyright (C) 1987-2004 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
@ -23,20 +23,21 @@ $PRODUCES trap.c
$BUILTIN trap
$FUNCTION trap_builtin
$SHORT_DOC trap [arg] [signal_spec ...] or trap -l
$SHORT_DOC trap [-lp] [[arg] signal_spec ...]
The command ARG is to be read and executed when the shell receives
signal(s) SIGNAL_SPEC. If ARG is absent all specified signals are
reset to their original values. If ARG is the null string each
SIGNAL_SPEC is ignored by the shell and by the commands it invokes.
If a SIGNAL_SPEC is EXIT (0) the command ARG is executed on exit from
the shell. If a SIGNAL_SPEC is DEBUG, ARG is executed after every
command. If ARG is `-p' then the trap commands associated with
each SIGNAL_SPEC are displayed. If no arguments are supplied or if
only `-p' is given, trap prints the list of commands associated with
each signal number. Each SIGNAL_SPEC is either a signal name in <signal.h>
or a signal number. `trap -l' prints a list of signal names and their
corresponding numbers. Note that a signal can be sent to the shell
with "kill -signal $$".
signal(s) SIGNAL_SPEC. If ARG is absent (and a single SIGNAL_SPEC
is supplied) or `-', each specified signal is reset to its original
value. If ARG is the null string each SIGNAL_SPEC is ignored by the
shell and by the commands it invokes. If a SIGNAL_SPEC is EXIT (0)
the command ARG is executed on exit from the shell. If a SIGNAL_SPEC
is DEBUG, ARG is executed after every simple command. If the`-p' option
is supplied then the trap commands associated with each SIGNAL_SPEC are
displayed. If no arguments are supplied or if only `-p' is given, trap
prints the list of commands associated with each signal. Each SIGNAL_SPEC
is either a signal name in <signal.h> or a signal number. Signal names
are case insensitive and the SIG prefix is optional. `trap -l' prints
a list of signal names and their corresponding numbers. Note that a
signal can be sent to the shell with "kill -signal $$".
$END
#include <config.h>
@ -108,6 +109,8 @@ trap_builtin (list)
}
list = loptend;
opt = DSIG_NOCASE|DSIG_SIGPREFIX; /* flags for decode_signal */
if (list_signal_names)
return (display_signal_list ((WORD_LIST *)NULL, 1));
else if (display || list == 0)
@ -119,13 +122,22 @@ trap_builtin (list)
operation = SET;
first_arg = list->word->word;
if (first_arg && *first_arg && (*first_arg != '-' || first_arg[1]) &&
signal_object_p (first_arg))
/* When in posix mode, the historical behavior of looking for a
missing first argument is disabled. To revert to the original
signal handling disposition, use `-' as the first argument. */
if (posixly_correct == 0 && first_arg && *first_arg &&
(*first_arg != '-' || first_arg[1]) &&
signal_object_p (first_arg, opt) && list->next == 0)
operation = REVERT;
else
{
list = list->next;
if (*first_arg == '\0')
if (list == 0)
{
builtin_usage ();
return (EX_USAGE);
}
else if (*first_arg == '\0')
operation = IGNORE;
else if (first_arg[0] == '-' && !first_arg[1])
operation = REVERT;
@ -133,7 +145,7 @@ trap_builtin (list)
while (list)
{
sig = decode_signal (list->word->word);
sig = decode_signal (list->word->word, opt);
if (sig == NO_SIG)
{
@ -235,7 +247,7 @@ display_traps (list)
for (result = EXECUTION_SUCCESS; list; list = list->next)
{
i = decode_signal (list->word->word);
i = decode_signal (list->word->word, DSIG_NOCASE|DSIG_SIGPREFIX);
if (i == NO_SIG)
{
sh_invalidsig (list->word->word);