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84 lines
1.7 KiB
Bash
84 lines
1.7 KiB
Bash
#!/bin/sh
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#
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# Copyright (C) 2017-2019 Hamish Coleman
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#
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# Look up the given filename in the description file and confirm that
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# the checksum matches
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#
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# FIXME
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# - the description file is expected to be in the current dir
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# - does not handle description file entries with more than just the sha1 tag
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DESCRIPTIONS='Descriptions.txt'
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if [ "$1" = "--mv_on_fail" ]; then
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MV_ON_FAIL=yes
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shift
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elif [ "$1" = "--rm_on_fail" ]; then
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RM_ON_FAIL=yes
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shift
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fi
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FILE="$1"
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if [ -z "$FILE" ]; then
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echo "Need filename" 2>&1
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exit 1
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fi
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shift
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# The name of the Descriptions.txt entry to use
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CHECKNAME="$1"
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if [ -z "$CHECKNAME" ]; then
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# default to the same as the filename
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CHECKNAME="$FILE"
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fi
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do_exit_fail() {
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if [ "$MV_ON_FAIL" ]; then
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BADNAME="${FILE}.bad"
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echo "ERROR: moved file to $BADNAME" 2>&1
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mv -f "$FILE" "$BADNAME"
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elif [ "$RM_ON_FAIL" ]; then
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echo "ERROR: removed file" 2>&1
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rm -f "$FILE"
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fi
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exit 1
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}
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if ! LINE=$(grep -E "^$CHECKNAME " "$DESCRIPTIONS"); then
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echo "Unknown file $CHECKNAME" 2>&1
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do_exit_fail
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fi
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if [ ! -e "$FILE" ]; then
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echo "File $FILE does not exist" 2>&1
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do_exit_fail
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fi
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SUM_FIELD=$(echo "$LINE" | awk -- '{print $2}')
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TYPE=$(echo "$SUM_FIELD" | cut -d: -f1)
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EXPECT=$(echo "$SUM_FIELD" | cut -d: -f2 |tr '[:upper:]' '[:lower:]')
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case "$TYPE" in
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sha1)
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GOT=$(sha1sum "$FILE" | cut -d" " -f1)
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;;
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sha256)
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GOT=$(sha256sum "$FILE" | cut -d" " -f1)
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;;
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*)
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echo "Unknown checksum type $TYPE for $CHECKNAME" 2>&1
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do_exit_fail
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;;
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esac
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if [ "$EXPECT" != "$GOT" ]; then
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echo "File $FILE failed checksum check" 2>&1
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do_exit_fail
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fi
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exit 0
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