build-sys: perform autodetection of quota-tools binaries

Use AC_PATH_PROG to try and locate the quotaon and quotacheck binaries,
falling back on hardcoded defaults when they can't be found.

Makefile.am

@@ -382,6 +382,7 @@ EXTRA_DIST += \
 	units/debug-shell.service.in \
 	units/systemd-hibernate.service.in \
 	units/systemd-suspend.service.in \
+	units/quotaon.service.in \
 	introspect.awk \
 	man/custom-html.xsl
 
@@ -2794,6 +2795,9 @@ endif
 EXTRA_DIST += \
 	units/systemd-quotacheck.service.in
 
+nodist_systemunit_DATA += \
+	units/quotaon.service
+
 # ------------------------------------------------------------------------------
 if ENABLE_RANDOMSEED
 rootlibexec_PROGRAMS += \
@@ -3427,6 +3431,8 @@ SED_PROCESS = \
 		-e 's,@rootprefix\@,$(rootprefix),g' \
 		-e 's,@udevlibexecdir\@,$(udevlibexecdir),g' \
 		-e 's,@sushell\@,$(sushell),g' \
+		-e 's,@QUOTAON\@,$(QUOTAON),g' \
+		-e 's,@QUOTACHECK\@,$(QUOTACHECK),g' \
 		< $< > $@
 
 units/%: units/%.in Makefile

configure.ac

@@ -64,6 +64,9 @@ AC_PROG_GCC_TRADITIONAL
 AC_PATH_PROG([M4], [m4])
 AC_PATH_PROG([XSLTPROC], [xsltproc])
 
+AC_PATH_PROG([QUOTAON], [quotaon], [/sbin/quotaon])
+AC_PATH_PROG([QUOTACHECK], [quotacheck], [/sbin/quotacheck])
+
 # gtkdocize greps for '^GTK_DOC_CHECK', so it needs to be on its own line
 m4_ifdef([GTK_DOC_CHECK], [
 GTK_DOC_CHECK([1.18],[--flavour no-tmpl])

units/.gitignore

@@ -14,6 +14,7 @@
 /rescue.service
 /systemd-ask-password-wall.service
 /systemd-quotacheck.service
+/quotaon.service
 /systemd-fsck@.service
 /systemd-fsck-root.service
 /systemd-tmpfiles-clean.service

units/quotaon.service.in

@@ -11,9 +11,9 @@ Documentation=man:quotaon(8)
 DefaultDependencies=no
 After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-quotacheck.service
 Before=local-fs.target shutdown.target
-ConditionPathExists=/sbin/quotaon
+ConditionPathExists=@QUOTAON@
 
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-ExecStart=/sbin/quotaon -aug
+ExecStart=@QUOTAON@ -aug

units/systemd-quotacheck.service.in

@@ -11,7 +11,7 @@ Documentation=man:systemd-quotacheck.service(8)
 DefaultDependencies=no
 After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
 Before=local-fs.target shutdown.target
-ConditionPathExists=/sbin/quotacheck
+ConditionPathExists=@QUOTACHECK@
 
 [Service]
 Type=oneshot