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[ssh_tools] multiping: check for dependencies 

Also some reformatting / modernization of the code.
This commit is contained in:
Matteo Cypriani 2019-10-21 15:43:54 +02:00
parent 8ae30d5e91
commit 410ac3789b
1 changed files with 27 additions and 10 deletions
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37
ssh_tools/multiping.sh
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@ -1,6 +1,6 @@
#!/bin/sh
#
# multiping.sh, Copyright © 2013 Matteo Cypriani <mcy@lm7.fr>
# multiping.sh, Copyright © 2013, 2019 Matteo Cypriani <mcy@lm7.fr>
# (Formerly named cluster-ping.sh)
#
# This program is free software. It comes without any warranty, to
@ -11,23 +11,40 @@
#
# Ping a list of remote hosts using fping.
#set -x
set -u
readonly EXIT_USAGE=127
readonly EXIT_DEPENDENCY=4
readonly EXIT_HOSTS_LIST=6
err()
{
printf 'Error! ' >&2
printf '%s\n' "$@" >&2
}
# Check arguments
if [ $# -ne 1 ] ; then
echo "Usage: $0 <hosts_list>"
exit 1
echo "Usage: $0 <hosts_list>" >&2
exit $EXIT_USAGE
fi
# Hosts' list file
if [ -z "$XDG_CONFIG_HOME" ] ; then
XDG_CONFIG_HOME="$HOME/.config"
FPING=$(command -v fping)
if [ -z "$FPING" ] ; then
err "fping is required for this script to work."
exit $EXIT_DEPENDENCY
fi
# Hosts list file
[ -z ${XDG_CONFIG_HOME+x} ] && XDG_CONFIG_HOME="$HOME/.config"
HOSTS="$XDG_CONFIG_HOME/ssh_tools/$1.lst"
echo "Using file '$HOSTS' as hosts' list."
echo "Using file '$HOSTS' as hosts list."
if [ ! -f "$HOSTS" ] ; then
echo "The hosts' list file doesn't exist or is not a regular file."
exit 2
err "The hosts list file doesn't exist or is not a regular file."
exit $EXIT_HOSTS_LIST
fi
# Go!
# shellcheck disable=SC2046
exec fping $(cat "$HOSTS") 2>/dev/null
exec "$FPING" $(cat "$HOSTS") 2>/dev/null