xfs_scrub_fail: fix sendmail detection

This script emails the results of failed scrub runs to root.  We
shouldn't be hardcoding the path to the mailer program because distros
can change the path according to their whim.  Modify this script to use
command -v to find the program.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/scrub/xfs_scrub_fail.in b/scrub/xfs_scrub_fail.in
index 4c4a30e89fed1659a1045e19c9edfe81ec5d0791..281af8a95f6cd0eb371ea30f19da73746b6d3ff7 100755 (executable)
--- a/scrub/xfs_scrub_fail.in
+++ b/scrub/xfs_scrub_fail.in
@@ -7,13 +7,14 @@
 
 # Email logs of failed xfs_scrub unit runs
 
-mailer=/usr/sbin/sendmail
 recipient="$1"
 test -z "${recipient}" && exit 0
 mntpoint="$2"
 test -z "${mntpoint}" && exit 0
 hostname="$(hostname -f 2>/dev/null)"
 test -z "${hostname}" && hostname="${HOSTNAME}"
+
+mailer="$(command -v sendmail)"
 if [ ! -x "${mailer}" ]; then
        echo "${mailer}: Mailer program not found."
        exit 1