68 lines
2.0 KiB
Bash
Executable File
68 lines
2.0 KiB
Bash
Executable File
# If we're auto-detecting our root type from DHCP, see if this looks like
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# an NFS root option. As the variety of root-path formats is large, validate
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# that the number of colons match what we expect, and our glob didn't
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# inadvertently match a different handler's.
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#
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if [ "$netroot" = "dhcp" -o "$netroot" = "nfs" -o "$netroot" = "nfs4" ]; then
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nfsver=nfs
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if [ "$netroot" = "nfs4" ]; then
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nfsver=nfs4
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fi
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case "$new_root_path" in
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nfs:*|nfs4:*) netroot="$new_root_path" ;;
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*:/*:*)
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if check_occurances "$new_root_path" ':' 2; then
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netroot="$nfsver:$new_root_path"
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fi ;;
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*:/*,*)
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if check_occurances "$new_root_path" ':' 1; then
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netroot="$nfsver:$new_root_path"
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fi ;;
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*:/*)
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if check_occurances "$new_root_path" ':' 1; then
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netroot="$nfsver:$new_root_path:"
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fi ;;
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/*:*)
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if check_occurances "$new_root_path" ':' 1; then
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netroot="$nfsver::$new_root_path"
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fi ;;
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/*,*)
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if check_occurances "$new_root_path" ':' 0; then
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netroot="$nfsver::$new_root_path"
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fi ;;
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/*)
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if check_occurances "$new_root_path" ':' 0; then
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netroot="$nfsver::$new_root_path:"
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fi ;;
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'') netroot="$nfsver:::" ;;
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esac
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fi
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if [ -z "${netroot%%nfs:*}" -o -z "${netroot%%nfs4:*}" ]; then
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# Fill in missing information from DHCP
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nfsver=${netroot%%:*}; netroot=${netroot#*:}
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nfsserver=${netroot%%:*}; netroot=${netroot#*:}
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nfspath=${netroot%%:*}
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nfsflags=${netroot#*:}
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# XXX where does dhclient stash the next-server option? Do we care?
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if [ -z "$nfsserver" -o "$nfsserver" = "$nfspath" ]; then
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nfsserver=$new_dhcp_server_identifier
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fi
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# Handle alternate syntax of path,options
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if [ "$nfsflags" = "$nfspath" -a "${netroot#*,}" != "$netroot" ]; then
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nfspath=${netroot%%,*}
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nfsflags=${netroot#*,}
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fi
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# Catch the case when no additional flags are set
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if [ "$nfspath" = "$nfsflags" ]; then
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unset nfsflags
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fi
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# XXX validate we have all the required info?
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netroot="$nfsver:$nfsserver:$nfspath:$nfsflags"
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handler=/sbin/nfsroot
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fi
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