[PATCH] Fix exit status of signal handlers in shell scripts

[Dmitry V. Levin]

The value of `$?' on entrance to signal handlers in shell scripts
cannot be relied upon, so set the exit code explicitly to
128 + SIGTERM == 143.
* lib/am/check.am (am__check_pre): Use `exit 143' in signal handler.
* lib/elisp-comp: Likewise.
* lib/install-sh: Likewise.
* lib/ylwrap: Likewise.
---
See also
http://lists.gnu.org/archive/html/bug-gnulib/2010-01/msg00361.html

 lib/am/check.am |    2 +-
 lib/elisp-comp  |    2 +-
 lib/install-sh  |    2 +-
 lib/ylwrap      |    2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/am/check.am b/lib/am/check.am
index b1d1aad..56fc732 100644
--- a/lib/am/check.am
+++ b/lib/am/check.am
@@ -101,7 +101,7 @@ $(am__sh_e_setup);                                  \
 $(am__vpath_adj_setup) $(am__vpath_adj)                        \
 srcdir=$(srcdir); export srcdir;                       \
 rm -f address@hidden;                                          \
-trap 'st=$$?; rm -f '\''$(abs_builddir)/address@hidden'\''; (exit $$st); exit 
$$st' \
+trap 'rm -f '\''$(abs_builddir)/address@hidden'\''; (exit 143); exit 143' \
   1 2 13 15;                                           \
 am__odir=`echo "./$@" | sed 's|/[^/]*$$||'`;           \
 test "x$$am__odir" = x. || $(MKDIR_P) "$$am__odir" || exit $$?;        \
diff --git a/lib/elisp-comp b/lib/elisp-comp
index ce8c82c..99026de 100755
--- a/lib/elisp-comp
+++ b/lib/elisp-comp
@@ -65,7 +65,7 @@ tempdir=elc.$$
 
 # Cleanup the temporary directory on exit.
 trap 'ret=$?; rm -rf "$tempdir" && exit $ret' 0
-trap '(exit $?); exit' 1 2 13 15
+trap '(exit 143); exit 143' 1 2 13 15
 
 mkdir $tempdir
 cp "$@" $tempdir
diff --git a/lib/install-sh b/lib/install-sh
index 6781b98..565e4c7 100755
--- a/lib/install-sh
+++ b/lib/install-sh
@@ -200,7 +200,7 @@ if test $# -eq 0; then
 fi
 
 if test -z "$dir_arg"; then
-  trap '(exit $?); exit' 1 2 13 15
+  trap '(exit 143); exit 143' 1 2 13 15
 
   # Set umask so as not to create temps with too-generous modes.
   # However, 'strip' requires both read and write access to temps.
diff --git a/lib/ylwrap b/lib/ylwrap
index 84d5634..8fbade6 100755
--- a/lib/ylwrap
+++ b/lib/ylwrap
@@ -99,7 +99,7 @@ esac
 # FIXME: add hostname here for parallel makes that run commands on
 # other machines.  But that might take us over the 14-char limit.
 dirname=ylwrap$$
-trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
+trap "cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1; (exit 143); exit 143" 1 
2 3 15
 mkdir $dirname || exit 1
 
 cd $dirname


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ldv