update-pciids.sh

   1 #!/bin/sh
   2
   3 [ "$1" = "-q" ] && quiet=true || quiet=false
   4
   5 set -e
   6 SRC="http://pci-ids.ucw.cz/v2.2/pci.ids"
   7 DEST=pci.ids
   8 PCI_COMPRESSED_IDS=
   9 GREP=grep
  10
  11 # if pci.ids is read-only (because the filesystem is read-only),
  12 # then just skip this whole process.
  13 if ! touch ${DEST} >/dev/null 2>&1 ; then
  14         ${quiet} || echo "${DEST} is read-only, exiting." 1>&2
  15         exit 1
  16 fi
  17
  18 if [ "$PCI_COMPRESSED_IDS" = 1 ] ; then
  19         DECOMP="cat"
  20         SRC="$SRC.gz"
  21         GREP=zgrep
  22 elif which bzip2 >/dev/null 2>&1 ; then
  23         DECOMP="bzip2 -d"
  24         SRC="$SRC.bz2"
  25 elif which gzip >/dev/null 2>&1 ; then
  26         DECOMP="gzip -d"
  27         SRC="$SRC.gz"
  28 else
  29         DECOMP="cat"
  30 fi
  31
  32 if which curl >/dev/null 2>&1 ; then
  33         DL="curl -o $DEST.new $SRC"
  34     ${quiet} && DL="$DL -s -S"
  35 elif which wget >/dev/null 2>&1 ; then
  36         DL="wget --no-timestamping -O $DEST.new $SRC"
  37         ${quiet} && DL="$DL -q"
  38 elif which lynx >/dev/null 2>&1 ; then
  39         DL="eval lynx -source $SRC >$DEST.new"
  40 else
  41         echo >&2 "update-pciids: cannot find curl, wget or lynx"
  42         exit 1
  43 fi
  44
  45 if ! $DL ; then
  46         echo >&2 "update-pciids: download failed"
  47         rm -f $DEST.new
  48         exit 1
  49 fi
  50
  51 if ! $DECOMP <$DEST.new >$DEST.neww ; then
  52         echo >&2 "update-pciids: decompression failed, probably truncated file"
  53         exit 1
  54 fi
  55
  56 if ! $GREP >/dev/null "^C " $DEST.neww ; then
  57         echo >&2 "update-pciids: missing class info, probably truncated file"
  58         exit 1
  59 fi
  60
  61 if [ -f $DEST ] ; then
  62         mv $DEST $DEST.old
  63         # --reference is supported only by chmod from GNU file, so let's ignore any errors
  64         chmod -f --reference=$DEST.old $DEST.neww 2>/dev/null || true
  65 fi
  66 mv $DEST.neww $DEST
  67 rm $DEST.new
  68
  69 # Older versions did not compress the ids file, so let's make sure we
  70 # clean that up.
  71 if [ ${DEST%.gz} != ${DEST} ] ; then
  72         rm -f ${DEST%.gz} ${DEST%.gz}.old
  73 fi
  74
  75 ${quiet} || echo "Done."