FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/cmd/fsck.zfs.in

     #!/bin/sh
     #
     # fsck.zfs: A fsck helper to accommodate distributions that expect
     # to be able to execute a fsck on all filesystem types.
     #
     # This script simply bubbles up some already-known-about errors,
     # see fsck.zfs(8)
     #
     
    if [ $# -eq 0 ]; then
            echo "Usage: $0 [options] dataset…" >&2
            exit 16
    fi
    
    ret=0
    for dataset; do
            case "$dataset" in
                    -*)
                            continue
                            ;;
                    *)
                            ;;
            esac
    
            pool="${dataset%%/*}"
    
            case "$(@sbindir@/zpool list -Ho health "$pool")" in
                    DEGRADED)
                            ret=$(( ret | 4 ))
                            ;;
                    FAULTED)
                            awk '!/^([[:space:]]*#.*)?$/ && $1 == "'"$dataset"'" && $3 == "zfs" {exit 1}' /etc/fstab || \
                                    ret=$(( ret | 8 ))
                            ;;
                    "")
                            # Pool not found, error printed by zpool(8)
                            ret=$(( ret | 8 ))
                            ;;
                    *)
                            ;;
            esac
    done
    
    exit "$ret"

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