projects / projects / geninitrd.git / blame
| Commit | Line | Data |
|---|---|---|
| 1cea325b ER |
1 | #!/bin/sh |
| 2 | # | |
| 3 | # geninitrd functions | |
| 4 | ||
| 5 | # Find root device from fstab. | |
| 6 | # | |
| 7 | # @param string $fstab location of /etc/fstab | |
| 8 | # @output string root device: /dev/hda1, /dev/sys/rootfs, etc | |
| 9 | # @return false on failure | |
| 10 | # | |
| 11 | # Sets global variables: | |
| 12 | # - $rootdev | |
| 13 | # - $rootFS | |
| 14 | # | |
| 15 | find_root() { | |
| 16 | local fstab="$1" | |
| 17 | local function='find_root' | |
| 18 | ||
| 19 | eval $(awk '/^[\t ]*#/ {next} {if ( $2 == "/" ) {print "rootdev=\"" $1 "\"\nrootFs=\"" $3 "\""}}' $fstab) | |
| 20 | if [ -z "$rootdev" ]; then | |
| 21 | echo >&2 "$function: can't find real device for rootfs" | |
| 22 | return 1 | |
| 23 | fi | |
| 24 | ||
| 25 | case $rootdev in | |
| 26 | LABEL=*) | |
| 27 | if [ ! -x /sbin/blkid ]; then | |
| 28 | echo >&2 "$function: /sbin/blkid is missing" | |
| 29 | return 2 | |
| 30 | fi | |
| 31 | ||
| 32 | local label=${rootdev#"LABEL="} | |
| 33 | local dev=$(/sbin/blkid -t LABEL="$label" -o device) | |
| 34 | if [ "$dev" -a -r "$dev" ]; then | |
| 35 | rootdev=$dev | |
| 36 | fi | |
| 37 | ;; | |
| 38 | ||
| 39 | UUID=*) | |
| 40 | if [ ! -x /sbin/blkid ]; then | |
| 41 | echo >&2 "$function: /sbin/blkid is missing" | |
| 42 | return 2 | |
| 43 | fi | |
| 44 | ||
| 45 | local uuid=${rootdev#"UUID="} | |
| 46 | local dev=$(/sbin/blkid -t UUID="$uuid" -o device) | |
| 47 | ||
| 48 | if [ "$dev" -a -r "$dev" ]; then | |
| 49 | rootdev=$dev | |
| 50 | fi | |
| 51 | ;; | |
| 52 | esac | |
| 53 | ||
| 54 | if [ ! -r "$rootdev" ]; then | |
| 55 | echo >&2 "$function: can't find real device for $rootdev" | |
| 56 | return 1 | |
| 57 | fi | |
| 58 | ||
| 59 | return 0 | |
| 60 | } |