99 lines
2.7 KiB
Bash
Executable file
99 lines
2.7 KiB
Bash
Executable file
#!/bin/sh
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#
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# Parameter: LISTE ACTION
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# z.B. ./get_files programme download
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#
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set -eu
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# die Key-Server muessen wohl einzeln angegeben werden - somit einzelne Direktiven
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KEY_SERVERS="x-hkp://pgp.mit.edu --keyserver hkp://subkeys.pgp.net"
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function download_file()
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{
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local QUELLE=$(grep "^$1[[:space:]]" $URL_FILE | cut -f 2)
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wget --continue --no-check-certificate --output-document "$DEST_DIR/$1" "$QUELLE"
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}
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function verify_file()
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{
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# eventuell die Datei herunterladen
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[ ! -e "$DEST_DIR/$1" ] && download_file "$1"
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[ ! -e "$DEST_DIR/$1" ] && return 1
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# Signatur-URL ermitteln
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local SIG_URL=$(grep "^$1[[:space:]]" $URL_FILE | cut -f 3)
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# bei fehlender Signatur erfolgreich abbrechen
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[ -z "$SIG_URL" ] && return 0
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# Signatur herunterladen
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local SIG_FILE=$DEST_DIR/$(basename "$SIG_URL")
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# html-encodierte Leerzeichen wiederherstellen
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SIG_FILE=${SIG_FILE//\%20/ }
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[ ! -e "$SIG_FILE" ] && wget --output-document "$SIG_FILE" "$SIG_URL"
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# pruefen - notfalls den Schluessel importieren
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# erstmal Ausgabe unterdruecken
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if gpg --quiet --keyserver $KEY_SERVERS --keyserver-options auto-key-retrieve --verify "$SIG_FILE" "$DEST_DIR/$1" &>/dev/null
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then return 0
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else gpg --quiet --keyserver $KEY_SERVERS --keyserver-options auto-key-retrieve --verify "$SIG_FILE" "$DEST_DIR/$1"
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# do it again (with output), if verification failed
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return 1
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fi
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}
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########### main ############
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if [ $# -lt 2 ]
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then echo "wrong parameters: $@"
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echo
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echo "Syntax: $(basename $0) DATEI_LISTE ACTION [DESTINATION]"
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echo
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exit 1
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fi
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URL_FILE=$(dirname $0)/${1}.lst
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DEST_DIR=$(dirname $0)/${1}
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shift
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[ ! -e "$URL_FILE" ] && echo "Die Datei ($URL_FILE) existiert nicht!" && exit 2
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[ -e "$DEST_DIR" ] || mkdir -p "$DEST_DIR"
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ACTION=help
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[ $# -gt 0 ] && ACTION=$1 && shift
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case "$ACTION" in
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download )
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cut -f 1 "$URL_FILE" | while read a
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do [ ! -e "$DEST_DIR/$a" ] && download_file "$a"
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done
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# ExitCode auf Null setzen
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true
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;;
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verify )
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cut -f 1 "$URL_FILE" | while read a
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do if verify_file "$a"
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then true
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else echo "Verification of '$a' failed ..."
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exit 1
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fi
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done
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;;
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clean )
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# Datei loeschen
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cut -f 1 "$URL_FILE" | while read a; do rm -f "$DEST_DIR/$a"; done
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# Signatur loeschen, falls vorhanden
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cut -f 3 "$URL_FILE" | sed /^$/d | while read a; do rm -f "$DEST_DIR/$(basename $a)"; done
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;;
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install )
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[ $# -eq 0 ] && echo 'You need to specify the destination directory!' && exit 1
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INST_DIR=$1
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[ ! -e "$INST_DIR" ] && mkdir -p "$INST_DIR"
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cut -f 1 "$URL_FILE" | while read a
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do [ -e "$DEST_DIR/$a" ] || download_file "$a"
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cp "$DEST_DIR/$a" "$INST_DIR/"
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done
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;;
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* )
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echo "Syntax: $0 LIST { download | install | clean } [ZIEL_VERZEICHNIS]"
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echo
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;;
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esac
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