test: Avoid use of /proc/self/fd

Use /dev/fd in test-bug-712116-dpkg-pre-install-pkgs-hook-multiarch,
skip test-no-fds-leaked-to-maintainer-scripts (it is not guaranteed
that /dev/fd contains all file descriptors), and avoid the unneeded
use of /proc/fd in another test case.

Gbp-Dch: ignore

test/integration/test-bug-712116-dpkg-pre-install-pkgs-hook-multiarch

@@ -32,7 +32,7 @@ if [ -n \"${2}\" ]; then
 	FD=\$APT_HOOK_INFO_FD
 	if [ "\$FD" != \"${2}\" ]; then echo \"ERROR: Information is not on requested FD: \$FD != ${2}\" >> ${hook}-v${1}.list; fi
 fi
-while read </proc/\$\$/fd/\$FD line; do
+while read </dev/fd/\$FD line; do
 	if echo \"\$line\" | grep -Fq '**'; then
 		echo \"\$line\"
 	fi

test/integration/test-bug-769609-triggers-still-pending-after-run

@@ -23,7 +23,7 @@ buildtriggerpackages() {
 	cat >"${BUILDDIR}/debian/postinst" <<EOF
 #!/bin/sh
 if [ "\$1" = 'triggered' ]; then
-	ls -l /proc/self/fd/
+	echo "TRIGGER IS RUNNING"
 fi
 EOF
 	echo "$TYPE /usr/share/doc" > "${BUILDDIR}/debian/triggers"
@@ -49,26 +49,26 @@ runtests() {
 	testsuccess aptget install trigdepends-$TYPE -y --reinstall
 	cp rootdir/tmp/testsuccess.output terminal.output
 	testsuccess grep '^REWRITE ' terminal.output
-	testsuccess grep ' root root ' terminal.output
+	testsuccess grep 'TRIGGER IS RUNNING' terminal.output
 	testdpkginstalled triggerable-$TYPE trigdepends-$TYPE
 
 	testsuccess aptget install trigstuff -y
 	cp rootdir/tmp/testsuccess.output terminal.output
 	testsuccess grep '^REWRITE ' terminal.output
-	testsuccess grep ' root root ' terminal.output
+	testsuccess grep 'TRIGGER IS RUNNING' terminal.output
 	testdpkginstalled triggerable-$TYPE trigdepends-$TYPE trigstuff
 
 	testsuccess aptget purge trigstuff -y
 	cp rootdir/tmp/testsuccess.output terminal.output
 	testsuccess grep '^REWRITE ' terminal.output
-	testsuccess grep ' root root ' terminal.output
+	testsuccess grep 'TRIGGER IS RUNNING' terminal.output
 	testdpkginstalled triggerable-$TYPE trigdepends-$TYPE
 	testdpkgnotinstalled trigstuff
 
 	testsuccess aptget purge trigdepends-$TYPE -y
 	cp rootdir/tmp/testsuccess.output terminal.output
 	testfailure grep '^REWRITE ' terminal.output
-	testfailure grep ' root root ' terminal.output
+	testfailure grep 'TRIGGER IS RUNNING' terminal.output
 	testdpkgnotinstalled triggerable-$TYPE trigdepends-$TYPE
 }
 #runtests 'interest'

test/integration/test-no-fds-leaked-to-maintainer-scripts

@@ -8,6 +8,11 @@ setupenvironment
 configarchitecture 'amd64' 'i386'
 configdpkgnoopchroot
 
+if [ ! -e /proc/self/fd ]; then
+	msgskip "needs /proc/self/fd"
+    exit 0
+fi
+
 setupsimplenativepackage "fdleaks" 'all' '1.0' 'unstable'
 BUILDDIR="incoming/fdleaks-1.0"
 for script in 'preinst' 'postinst' 'prerm' 'postrm'; do