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Server : LiteSpeed
System : Linux v2202501248978307069 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64
User : voirf6718 ( 1002)
PHP Version : 7.3.33-1+focal
Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,
Directory : /lib/udev/

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Current File : //lib/udev/bcache-export-cached

#!/bin/sh
#
# This program reads the bcache superblock on bcacheX slaves to extract the
# dev.uuid and dev.label which refer to a specific backing device.
#
# It integrates with udev 'import' by writing CACHED_UUID=X and optionally
# CACHED_LABEL=X for the backing device of the provided bcache device.
# Ignore caching devices by skipping unless sb.version=1
#
# There is 1 and only 1 backing device (slaves/*) for a bcache device.

TEMPNODE=${1}               # /dev/bcacheN
DEVNAME=${TEMPNODE##*/}     # /dev/bcacheN -> bcacheN

for slave in "/sys/class/block/$DEVNAME/slaves"/*; do
    [ -d "$slave" ] || continue
    /usr/sbin/bcache-super-show "/dev/${slave##*/}" |
       awk '$1 == "sb.version" { sbver=$2; }
            $1 == "dev.uuid" { uuid=$2; }
            $1 == "dev.label" && $2 != "(empty)" { label=$2; }
            END {
                if (sbver == 1 && uuid) {
                    print("CACHED_UUID=" uuid)
                    if (label) print("CACHED_LABEL=" label)
                    exit(0)
                }
                exit(1);
            }'
    # awk exits 0 if it found a backing device.
    [ $? -eq 0 ] && exit 0
done

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