[ssh_tools] multicopy: improve message handling
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@ -16,7 +16,7 @@ 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_USAGE=127
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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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@ -24,15 +24,36 @@ readonly EXIT_CONNECTION=8
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print_usage()
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{
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echo "Usage:"
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echo " $0 [-P] [-r|-R] [-l login] <hosts_list> <file1> [file2 [...]]"
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echo
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echo "Options:"
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echo " -P: transfer files in parallel instead of one by one if possible"
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echo " (ignored when -r or -R is used)."
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echo " -r: use prsync instead of pscp."
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echo " -R: use prsync with option --delete (delete remote files that are"
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echo " not in the local copy)."
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cat <<EOF
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Usage:
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$0 [-P] [-r|-R] [-l login] <hosts_list> <file1> [file2 [...]]
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Options:
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-h Print this help message.
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-P Transfer files in parallel instead of one by one whenever possible
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(ignored when -r or -R is used).
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-r Use prsync instead of pscp.
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-R Use prsync's --delete option (delete remote files that are not in
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the local copy).
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EOF
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}
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bad_usage()
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{
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err "$@"
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echo >&2
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print_usage >&2
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exit $EXIT_USAGE
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}
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err()
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{
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printf 'Error! %s\n' "$@" >&2
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}
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warn()
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{
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printf 'Warning! %s\n' "$@" >&2
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}
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# Parse the optional arguments
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@ -70,17 +91,13 @@ done
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# example with "multicopy -l root -P my_file", it will try to use
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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 $EXIT_USAGE
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bad_usage "Wrong number of arguments."
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fi
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# Check the usage of -r and -R
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if [ "$DELETE" = "1" ] ; then
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if [ "$RSYNC" = "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 $EXIT_USAGE
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bad_usage "Use either -r or -R, but not both."
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fi
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RSYNC=1
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DELETE="-X --delete"
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@ -88,7 +105,7 @@ fi
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# Ignore -P if rsync is going to be used
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if [ "$RSYNC" = "1" ] && [ "$PARALLEL" = "1" ] ; then
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echo "Cannot transfer in parallel when using rsync: ignoring -P."
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warn "Cannot transfer in parallel when using rsync: ignoring -P."
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PARALLEL=""
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fi
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@ -97,16 +114,16 @@ PSCP=$(command -v parallel-scp || command -v pscp.pssh || command -v pscp)
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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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err "Parallel SSH (pssh) is required for this script to work."
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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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err "Parallel rsync (prsync) is required for this script to work."
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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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err "multiping (which should have been provided along with this" \
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"script) is required for this script to work."
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exit $EXIT_DEPENDENCY
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fi
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@ -119,7 +136,7 @@ HOSTS="$XDG_CONFIG_HOME/ssh_tools/${HOSTS_LIST_NAME}.lst"
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shift
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echo "Using file '$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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err "The hosts' list file doesn't exist or is not a regular file."
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exit $EXIT_HOSTS_LIST
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fi
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@ -135,13 +152,13 @@ fi
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FIRST_HOST=$($MULTIPING "$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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err "None of the remote hosts is alive."
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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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err "Cannot connect to the first alive host. Aborting."
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exit $EXIT_CONNECTION
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fi
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echo "Destination directory: $DEST_DIR"
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@ -156,7 +173,7 @@ fi
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for FILE in "$@" ; do
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echo "Deploying '$FILE'..."
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if [ ! -e "$FILE" ] ; then
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echo "This file doesn't exist, skipping."
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warn "This file doesn't exist, skipping."
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continue
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fi
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if [ "$RSYNC" = "1" ] ; then
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