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tests: update init.sh from gnulib

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* tests/init.sh: Update from gnulib.
This commit is contained in:
Jim Meyering 2010-05-17 09:12:22 +02:00
parent fe953ad710
commit 1173dcd632
1 changed files with 31 additions and 14 deletions
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45
tests/init.sh
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@ -63,33 +63,50 @@
# - hyphen-containing alias names
# - we prefer to use ${var#...} substitution, rather than having
# to work around lack of support for that feature.
# The following code attempts to find a shell with support for these features
# and re-exec's it. If not, it skips the current test.
# The following code attempts to find a shell with support for these features.
# If the current shell passes the test, we're done. Otherwise, test other
# shells until we find one that passes. If one is found, re-exec it.
# If no acceptable shell is found, skip the current test.
#
# Use "9" to indicate success (rather than 0), in case some shell acts
# like Solaris 10's /bin/sh but exits successfully instead of with status 2.
gl_shell_test_script_='
test $(echo y) = y || exit 1
test -z "$EXEEXT" && exit 0
test -z "$EXEEXT" && exit 9
shopt -s expand_aliases
alias a-b="echo zoo"
v=abx
test ${v%x} = ab \
&& test ${v#a} = bx \
&& test $(a-b) = zoo
&& test $(a-b) = zoo \
&& exit 9
'
if test "x$1" = "x--no-reexec"; then
shift
else
for re_shell_ in "${CONFIG_SHELL:-no_shell}" /bin/sh bash dash zsh pdksh fail
do
test "$re_shell_" = no_shell && continue
test "$re_shell_" = fail && skip_ failed to find an adequate shell
if "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null; then
exec "$re_shell_" "$0" --no-reexec "$@"
echo "$ME_: exec failed" 1>&2
exit 127
fi
done
# 'eval'ing the above code makes Solaris 10's /bin/sh exit with $? set to 2.
# It does not evaluate any of the code after the "unexpected" `('. Thus,
# we must run it in a subshell.
( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
if test $? = 9; then
: # The current shell is adequate. No re-exec required.
else
# Search for a shell that meets our requirements.
for re_shell_ in "${CONFIG_SHELL:-no_shell}" /bin/sh bash dash zsh pdksh fail
do
test "$re_shell_" = no_shell && continue
test "$re_shell_" = fail && skip_ failed to find an adequate shell
"$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
if test $? = 9; then
# Found an acceptable shell.
exec "$re_shell_" "$0" --no-reexec "$@"
echo "$ME_: exec failed" 1>&2
exit 127
fi
done
fi
fi
test -n "$EXEEXT" && shopt -s expand_aliases