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* doc/autoconf.texi (Limitations of Builtins): Do not invoke

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`trap ... 0' inside a function, for AIX sh.
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Ralf Wildenhues 2006-10-27 23:01:06 +00:00
parent e6be421d52
commit 84c6b66796
2 changed files with 8 additions and 1 deletions
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@ -1,3 +1,8 @@
2006-10-27 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* doc/autoconf.texi (Limitations of Builtins): Do not invoke
`trap ... 0' inside a function, for AIX sh.
2006-10-26 Paul Eggert <eggert@cs.ucla.edu>
* tests/base.at (AC_COMPUTE_INT): Test **0** rather than 1 / 0,

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doc/autoconf.texi
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@ -12813,7 +12813,9 @@ expr "X$ac_feature" : '.*[^-a-zA-Z0-9_]' >/dev/null &&
@prindex @command{trap}
It is safe to trap at least the signals 1, 2, 13, and 15. You can also
trap 0, i.e., have the @command{trap} run when the script ends (either via an
explicit @command{exit}, or the end of the script).
explicit @command{exit}, or the end of the script). The trap for 0 should be
installed outside of a shell function, or @acronym{AIX} 5.3 @command{/bin/sh}
will invoke the trap at the end of this function.
Posix says that @samp{trap - 1 2 13 15} resets the traps for the
specified signals to their default values, but many common shells (e.g.,