[ssh_tools] multicopy: variables for exit codes
Also enable set -u.
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@ -1,6 +1,6 @@
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#!/bin/sh
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#
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# multicopy.sh, Copyright © 2013 Matteo Cypriani <mcy@lm7.fr>
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# multicopy.sh, Copyright © 2013, 2019 Matteo Cypriani <mcy@lm7.fr>
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# (Formerly named cluster-deploy.sh)
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#
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# This program is free software. It comes without any warranty, to
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@ -12,6 +12,15 @@
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# Deploy files on a number of remote hosts using Parallel SCP.
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#set -x
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set -u
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# Exit codes
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readonly EXIT_SUCCESS=0
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readonly EXIT_USAGE=1
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readonly EXIT_DEPENDENCY=4
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readonly EXIT_HOSTS_LIST=6
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readonly EXIT_HOSTS_DEAD=7
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readonly EXIT_CONNECTION=8
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print_usage()
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{
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@ -29,6 +38,10 @@ print_usage()
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# Parse the optional arguments
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while [ $# -gt 2 ] ; do
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case $1 in
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"-h")
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print_usage
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exit $EXIT_SUCCESS
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;;
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"-l")
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LOGIN="$2"
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shift
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@ -58,7 +71,7 @@ done
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# "-P" as hosts' list and "my_file" as the file to be transfered.
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if [ $# -lt 2 ] ; then
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print_usage
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exit 1
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exit $EXIT_USAGE
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fi
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# Check the usage of -r and -R
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@ -67,7 +80,7 @@ if [ "$DELETE" = "1" ] ; then
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echo "Use either -r or -R, but not both!"
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echo
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print_usage
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exit 2
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exit $EXIT_USAGE
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fi
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RSYNC=1
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DELETE="-X --delete"
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@ -85,14 +98,16 @@ PRSYNC=$(command -v parallel-rsync || command -v prsync)
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MULTIPING=$(command -v multiping)
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if [ -z "$RSYNC" ] && [ -z "$PSCP" ] ; then
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echo "Parallel SSH (pssh) is required for this script to work."
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exit 4
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elif [ -z "$PRSYNC" ] ; then
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exit $EXIT_DEPENDENCY
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fi
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if [ -z "$PRSYNC" ] ; then
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echo "Parallel rsync (prsync) is required for this script to work."
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exit 5
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elif [ -z "$MULTIPING" ] ; then
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exit $EXIT_DEPENDENCY
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fi
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if [ -z "$MULTIPING" ] ; then
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echo "multiping (which should have been provided along with this"
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echo "script) is required for this script to work."
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exit 6
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exit $EXIT_DEPENDENCY
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fi
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# Hosts' list file
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@ -105,7 +120,7 @@ shift
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echo "Using file '$HOSTS' as hosts' list."
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if [ ! -f "$HOSTS" ] ; then
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echo "The hosts' list file doesn't exist or is not a regular file."
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exit 3
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exit $EXIT_HOSTS_LIST
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fi
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# Login
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@ -115,19 +130,19 @@ if [ -n "$LOGIN" ] ; then
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LOGIN="-l $LOGIN"
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fi
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# Test the connection to the first host and get the destination
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# Test the connection to the first alive host and get the destination
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# directory (home directory of the remote user)
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FIRST_HOST=$($MULTIPING "$HOSTS_LIST_NAME" 2>/dev/null \
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| sed -n "s/ is alive$//p" | head -n1)
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if [ -z "$FIRST_HOST" ] ; then
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echo "None of the remote hosts is alive."
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exit 7
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exit $EXIT_HOSTS_DEAD
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fi
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echo "Testing connection to $FIRST_HOST..."
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DEST_DIR="$(ssh "${SSH_LOGIN}${FIRST_HOST}" 'echo $HOME' 2>/dev/null)"
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if [ -z "$DEST_DIR" ] ; then
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echo "Cannot connect to the first alive host. Aborting."
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exit 7
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exit $EXIT_CONNECTION
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fi
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echo "Destination directory: $DEST_DIR"
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