Linux는 드라이버를 어떻게 알 수 있나요?

Linux는 드라이버를 어떻게 알 수 있나요?

드라이버 소스 코드를 살펴보겠습니다.http://www.acs.com.hk/download-driver-unified/6258/ACS-Unified-Driver-Lnx-Mac-113-P.zip

컴파일 후에는 두 개의 파일로 끝나는 것 같습니다.

  • libacsccid.so
  • 92-libacsccid1.rules

(하나도 있지만 Info.plistOS X에만 해당되는 것 같습니다)

첫 번째 make install파일을 넣고 /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Linux/libacsccid.so두 번째 파일을 넣어야 합니다 /etc/udev/rules.d/.

문제는...Linux가 파일 libacsccid.so이 특정 상황에서 사용해야 하는 드라이버인지 어떻게 알 수 있느냐는 것입니다.

이는 다음과 같은 출력입니다 make --dry-run install.

fail=; \
if (target_option=k; case ${target_option-} in ?) ;; *) echo "am__make_running_with_option: internal error: invalid" "target option '${target_option-}' specified" >&2; exit 1;; esac; has_opt=no; sane_makeflags=$MAKEFLAGS; if { if test -z '0'; then false; elif test -n 'x86_64-pc-linux-gnu'; then true; elif test -n '4.2.1' && test -n '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3'; then true; else false; fi; }; then sane_makeflags=$MFLAGS; else case $MAKEFLAGS in *\\[\ \   ]*) bs=\\; sane_makeflags=`printf '%s\n' "$MAKEFLAGS" | sed "s/$bs$bs[$bs $bs   ]*//g"`;; esac; fi; skip_next=no; strip_trailopt () { flg=`printf '%s\n' "$flg" | sed "s/$1.*$//"`; }; for flg in $sane_makeflags; do test $skip_next = yes && { skip_next=no; continue; }; case $flg in *=*|--*) continue;; -*I) strip_trailopt 'I'; skip_next=yes;; -*I?*) strip_trailopt 'I';; -*O) strip_trailopt 'O'; skip_next=yes;; -*O?*) strip_trailopt 'O';; -*l) strip_trailopt 'l'; skip_next=yes;; -*l?*) strip_trailopt 'l';; -[dEDm]) skip_next=yes;; -[JT]) skip_next=yes;; esac; case $flg in *$target_option*) has_opt=yes; break;; esac; done; test $has_opt = yes); then \
  failcom='fail=yes'; \
else \
  failcom='exit 1'; \
fi; \
dot_seen=no; \
target=`echo install-recursive | sed s/-recursive//`; \
case "install-recursive" in \
  distclean-* | maintainer-clean-*) list='src' ;; \
  *) list='src' ;; \
esac; \
for subdir in $list; do \
  echo "Making $target in $subdir"; \
  if test "$subdir" = "."; then \
    dot_seen=yes; \
    local_target="$target-am"; \
  else \
    local_target="$target"; \
  fi; \
  (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make  $local_target) \
  || eval $failcom; \
done; \
if test "$dot_seen" = "no"; then \
  make  "$target-am" || exit 1; \
fi; test -z "$fail"
Making install in src
make[1]: Wejście do katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3/src'
./create_Info_plist.pl ./supported_readers.txt ./Info.plist.src --target=libacsccid.so --version=1.1.3 --no-class > Info.plist
/bin/sh /home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3/config/install-sh -d /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Linux/
cp Info.plist /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/
cp .libs/libacsccid.so /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Linux/libacsccid.so
/bin/echo -e "\n\33[01;31m***************\n" ; echo "copy the src/92_pcscd_acsccid.rules file in udev directory (/etc/udev/rules.d/)" ; /bin/echo -e "\n***************\n\33[0m"
make[1]: Opuszczenie katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3/src'
make[1]: Wejście do katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3'
test -f config.h || rm -f stamp-h1
test -f config.h || make  stamp-h1
make  install-exec-am install-data-am
make[2]: Wejście do katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3'
make[2]: Nie ma nic do zrobienia w 'install-exec-am'.
make[2]: Nie ma nic do zrobienia w 'install-data-am'.
make[2]: Opuszczenie katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3'
make[1]: Opuszczenie katalogu '/home/luken/Pobrane/acs-driver/ACS-Unified-Driver-Lnx-Mac-113-P/acsccid-1.1.3'

이는 다음과 같습니다 92-libacsccid1.rules.

# udev rules for ACS CCID devices

# If not adding the device, go away
ACTION!="add", GOTO="pcscd_acsccid_rules_end"
SUBSYSTEM!="usb", GOTO="pcscd_acsccid_rules_end"
ENV{DEVTYPE}!="usb_device", GOTO="pcscd_acsccid_rules_end"

# set USB power management to auto.
ENV{ID_USB_INTERFACES}==":0b0000:", RUN+="/bin/sh -c 'echo auto > /sys/$devpath/power/control'"

# All done
LABEL="pcscd_acsccid_rules_end"

install-sh문서:

#!/bin/sh
# install - install a program, script, or datafile

scriptversion=2014-09-12.12; # UTC

# This originates from X11R5 (mit/util/scripts/install.sh), which was
# later released in X11R6 (xc/config/util/install.sh) with the
# following copyright and license.
#
# Copyright (C) 1994 X Consortium
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# Except as contained in this notice, the name of the X Consortium shall not
# be used in advertising or otherwise to promote the sale, use or other deal-
# ings in this Software without prior written authorization from the X Consor-
# tium.
#
#
# FSF changes to this file are in the public domain.
#
# Calling this script install-sh is preferred over install.sh, to prevent
# 'make' implicit rules from creating a file called install from it
# when there is no Makefile.
#
# This script is compatible with the BSD install script, but was written
# from scratch.

tab='   '
nl='
'
IFS=" $tab$nl"

# Set DOITPROG to "echo" to test this script.

doit=${DOITPROG-}
doit_exec=${doit:-exec}

# Put in absolute file names if you don't have them in your path;
# or use environment vars.

chgrpprog=${CHGRPPROG-chgrp}
chmodprog=${CHMODPROG-chmod}
chownprog=${CHOWNPROG-chown}
cmpprog=${CMPPROG-cmp}
cpprog=${CPPROG-cp}
mkdirprog=${MKDIRPROG-mkdir}
mvprog=${MVPROG-mv}
rmprog=${RMPROG-rm}
stripprog=${STRIPPROG-strip}

posix_mkdir=

# Desired mode of installed file.
mode=0755

chgrpcmd=
chmodcmd=$chmodprog
chowncmd=
mvcmd=$mvprog
rmcmd="$rmprog -f"
stripcmd=

src=
dst=
dir_arg=
dst_arg=

copy_on_change=false
is_target_a_directory=possibly

usage="\
Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
   or: $0 [OPTION]... SRCFILES... DIRECTORY
   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
   or: $0 [OPTION]... -d DIRECTORIES...

In the 1st form, copy SRCFILE to DSTFILE.
In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
In the 4th, create DIRECTORIES.

Options:
     --help     display this help and exit.
     --version  display version info and exit.

  -c            (ignored)
  -C            install only if different (preserve the last data modification time)
  -d            create directories instead of installing files.
  -g GROUP      $chgrpprog installed files to GROUP.
  -m MODE       $chmodprog installed files to MODE.
  -o USER       $chownprog installed files to USER.
  -s            $stripprog installed files.
  -t DIRECTORY  install into DIRECTORY.
  -T            report an error if DSTFILE is a directory.

Environment variables override the default commands:
  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
  RMPROG STRIPPROG
"

while test $# -ne 0; do
  case $1 in
    -c) ;;

    -C) copy_on_change=true;;

    -d) dir_arg=true;;

    -g) chgrpcmd="$chgrpprog $2"
        shift;;

    --help) echo "$usage"; exit $?;;

    -m) mode=$2
        case $mode in
          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
            echo "$0: invalid mode: $mode" >&2
            exit 1;;
        esac
        shift;;

    -o) chowncmd="$chownprog $2"
        shift;;

    -s) stripcmd=$stripprog;;

    -t)
        is_target_a_directory=always
        dst_arg=$2
        # Protect names problematic for 'test' and other utilities.
        case $dst_arg in
          -* | [=\(\)!]) dst_arg=./$dst_arg;;
        esac
        shift;;

    -T) is_target_a_directory=never;;

    --version) echo "$0 $scriptversion"; exit $?;;

    --) shift
        break;;

    -*) echo "$0: invalid option: $1" >&2
        exit 1;;

    *)  break;;
  esac
  shift
done

# We allow the use of options -d and -T together, by making -d
# take the precedence; this is for compatibility with GNU install.

if test -n "$dir_arg"; then
  if test -n "$dst_arg"; then
    echo "$0: target directory not allowed when installing a directory." >&2
    exit 1
  fi
fi

if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
  # When -d is used, all remaining arguments are directories to create.
  # When -t is used, the destination is already specified.
  # Otherwise, the last argument is the destination.  Remove it from $@.
  for arg
  do
    if test -n "$dst_arg"; then
      # $@ is not empty: it contains at least $arg.
      set fnord "$@" "$dst_arg"
      shift # fnord
    fi
    shift # arg
    dst_arg=$arg
    # Protect names problematic for 'test' and other utilities.
    case $dst_arg in
      -* | [=\(\)!]) dst_arg=./$dst_arg;;
    esac
  done
fi

if test $# -eq 0; then
  if test -z "$dir_arg"; then
    echo "$0: no input file specified." >&2
    exit 1
  fi
  # It's OK to call 'install-sh -d' without argument.
  # This can happen when creating conditional directories.
  exit 0
fi

if test -z "$dir_arg"; then
  if test $# -gt 1 || test "$is_target_a_directory" = always; then
    if test ! -d "$dst_arg"; then
      echo "$0: $dst_arg: Is not a directory." >&2
      exit 1
    fi
  fi
fi

if test -z "$dir_arg"; then
  do_exit='(exit $ret); exit $ret'
  trap "ret=129; $do_exit" 1
  trap "ret=130; $do_exit" 2
  trap "ret=141; $do_exit" 13
  trap "ret=143; $do_exit" 15

  # Set umask so as not to create temps with too-generous modes.
  # However, 'strip' requires both read and write access to temps.
  case $mode in
    # Optimize common cases.
    *644) cp_umask=133;;
    *755) cp_umask=22;;

    *[0-7])
      if test -z "$stripcmd"; then
        u_plus_rw=
      else
        u_plus_rw='% 200'
      fi
      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
    *)
      if test -z "$stripcmd"; then
        u_plus_rw=
      else
        u_plus_rw=,u+rw
      fi
      cp_umask=$mode$u_plus_rw;;
  esac
fi

for src
do
  # Protect names problematic for 'test' and other utilities.
  case $src in
    -* | [=\(\)!]) src=./$src;;
  esac

  if test -n "$dir_arg"; then
    dst=$src
    dstdir=$dst
    test -d "$dstdir"
    dstdir_status=$?
  else

    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
    # might cause directories to be created, which would be especially bad
    # if $src (and thus $dsttmp) contains '*'.
    if test ! -f "$src" && test ! -d "$src"; then
      echo "$0: $src does not exist." >&2
      exit 1
    fi

    if test -z "$dst_arg"; then
      echo "$0: no destination specified." >&2
      exit 1
    fi
    dst=$dst_arg

    # If destination is a directory, append the input filename; won't work
    # if double slashes aren't ignored.
    if test -d "$dst"; then
      if test "$is_target_a_directory" = never; then
        echo "$0: $dst_arg: Is a directory" >&2
        exit 1
      fi
      dstdir=$dst
      dst=$dstdir/`basename "$src"`
      dstdir_status=0
    else
      dstdir=`dirname "$dst"`
      test -d "$dstdir"
      dstdir_status=$?
    fi
  fi

  obsolete_mkdir_used=false

  if test $dstdir_status != 0; then
    case $posix_mkdir in
      '')
        # Create intermediate dirs using mode 755 as modified by the umask.
        # This is like FreeBSD 'install' as of 1997-10-28.
        umask=`umask`
        case $stripcmd.$umask in
          # Optimize common cases.
          *[2367][2367]) mkdir_umask=$umask;;
          .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;

          *[0-7])
            mkdir_umask=`expr $umask + 22 \
              - $umask % 100 % 40 + $umask % 20 \
              - $umask % 10 % 4 + $umask % 2
            `;;
          *) mkdir_umask=$umask,go-w;;
        esac

        # With -d, create the new directory with the user-specified mode.
        # Otherwise, rely on $mkdir_umask.
        if test -n "$dir_arg"; then
          mkdir_mode=-m$mode
        else
          mkdir_mode=
        fi

        posix_mkdir=false
        case $umask in
          *[123567][0-7][0-7])
            # POSIX mkdir -p sets u+wx bits regardless of umask, which
            # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
            ;;
          *)
            # $RANDOM is not portable (e.g. dash);  use it when possible to
            # lower collision chance
            tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
            trap 'ret=$?; rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null; exit $ret' 0

            # As "mkdir -p" follows symlinks and we work in /tmp possibly;  so
            # create the $tmpdir first (and fail if unsuccessful) to make sure
            # that nobody tries to guess the $tmpdir name.
            if (umask $mkdir_umask &&
                $mkdirprog $mkdir_mode "$tmpdir" &&
                exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
            then
              if test -z "$dir_arg" || {
                   # Check for POSIX incompatibilities with -m.
                   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
                   # other-writable bit of parent directory when it shouldn't.
                   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
                   test_tmpdir="$tmpdir/a"
                   ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
                   case $ls_ld_tmpdir in
                     d????-?r-*) different_mode=700;;
                     d????-?--*) different_mode=755;;
                     *) false;;
                   esac &&
                   $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
                     ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
                     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
                   }
                 }
              then posix_mkdir=:
              fi
              rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
            else
              # Remove any dirs left behind by ancient mkdir implementations.
              rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
            fi
            trap '' 0;;
        esac;;
    esac

    if
      $posix_mkdir && (
        umask $mkdir_umask &&
        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
      )
    then :
    else

      # The umask is ridiculous, or mkdir does not conform to POSIX,
      # or it failed possibly due to a race condition.  Create the
      # directory the slow way, step by step, checking for races as we go.

      case $dstdir in
        /*) prefix='/';;
        [-=\(\)!]*) prefix='./';;
        *)  prefix='';;
      esac

      oIFS=$IFS
      IFS=/
      set -f
      set fnord $dstdir
      shift
      set +f
      IFS=$oIFS

      prefixes=

      for d
      do
        test X"$d" = X && continue

        prefix=$prefix$d
        if test -d "$prefix"; then
          prefixes=
        else
          if $posix_mkdir; then
            (umask=$mkdir_umask &&
             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
            # Don't fail if two instances are running concurrently.
            test -d "$prefix" || exit 1
          else
            case $prefix in
              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
              *) qprefix=$prefix;;
            esac
            prefixes="$prefixes '$qprefix'"
          fi
        fi
        prefix=$prefix/
      done

      if test -n "$prefixes"; then
        # Don't fail if two instances are running concurrently.
        (umask $mkdir_umask &&
         eval "\$doit_exec \$mkdirprog $prefixes") ||
          test -d "$dstdir" || exit 1
        obsolete_mkdir_used=true
      fi
    fi
  fi

  if test -n "$dir_arg"; then
    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
  else

    # Make a couple of temp file names in the proper directory.
    dsttmp=$dstdir/_inst.$$_
    rmtmp=$dstdir/_rm.$$_

    # Trap to clean up those temp files at exit.
    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0

    # Copy the file name to the temp name.
    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&

    # and set any options; do chmod last to preserve setuid bits.
    #
    # If any of these fail, we abort the whole thing.  If we want to
    # ignore errors from any of these, just make sure not to ignore
    # errors from the above "$doit $cpprog $src $dsttmp" command.
    #
    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&

    # If -C, don't bother to copy if it wouldn't change the file.
    if $copy_on_change &&
       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
       set -f &&
       set X $old && old=:$2:$4:$5:$6 &&
       set X $new && new=:$2:$4:$5:$6 &&
       set +f &&
       test "$old" = "$new" &&
       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
    then
      rm -f "$dsttmp"
    else
      # Rename the file to the real destination.
      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||

      # The rename failed, perhaps because mv can't rename something else
      # to itself, or perhaps because mv is so ancient that it does not
      # support -f.
      {
        # Now remove or move aside any old file at destination location.
        # We try this two ways since rm can't unlink itself on some
        # systems and the destination file might be busy for other
        # reasons.  In this case, the final cleanup might fail but the new
        # file should still install successfully.
        {
          test ! -f "$dst" ||
          $doit $rmcmd -f "$dst" 2>/dev/null ||
          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
            { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
          } ||
          { echo "$0: cannot unlink or rename $dst" >&2
            (exit 1); exit 1
          }
        } &&

        # Now rename the file to the real destination.
        $doit $mvcmd "$dsttmp" "$dst"
      }
    fi || exit 1

    trap '' 0
  fi
done

# Local variables:
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-time-zone: "UTC"
# time-stamp-end: "; # UTC"
# End:

답변1

Linux 드라이버는 다음에서 실행됩니다.핵심. 시스템 부팅 시 커널 이미지에 포함된 드라이버 외에 일부 드라이버가 로드됩니다.기준 치수. 해당 장치가 감지되면 로드할 수 있는 몇 가지 매우 일반적인 드라이버 클래스가 있습니다(참조데비안 재부팅 후 직렬 PCI 카드가 감지되지 않습니다). 다른 드라이버는 명시적으로 로드해야 합니다. 일부 하드웨어는 검색될 수 있으므로 드라이버는 지원되는 하드웨어를 검색합니다. 일부 하드웨어는 감지할 수 없으며(다행히도 PC에서는 극히 드물며 임베디드 환경에서도 일반적이지 않습니다), 하드웨어 장치가 컴퓨터에 어떻게 연결되어 있는지 드라이버에게 알려주어야 합니다.

커널만이 하드웨어와 통신할 수 있습니다. 이는 기본적인 보안 제한 사항입니다. 그러나 커널 드라이버는 사용자 공간 프로그램과 통신 메커니즘을 구축할 수 있으며, 이는 드라이버의 일부로 작동합니다. 이는 비디오 카드 드라이버의 일부가 그래픽 모니터 내에서 실행되는 그래픽 모니터에서 발생합니다.X 서버 프로세스. 이는 커널 드라이버가 낮은 수준의 통신 프로토콜을 처리하고 액세스 제어 스마트 카드에서도 발생합니다.pcscd이 프로그램은 고급 명령을 처리합니다.

특정 드라이버 기능이 사용자 공간 프로그램으로 오프로드될 때 하드웨어 종속 드라이버 구성 요소를 선택하는 표준 방법은 없습니다. 프로그램에 따라 다릅니다.

의 경우 pcscd리더별 코드가 .so공유 라이브러리(파일)로 로드됩니다 /usr/lib/pcsc/drivers. 시리즈 리더에는 입력이 필요합니다 /etc/reader.conf.d/reader.conf. USB 카드 리더가 자동으로 감지됩니다. 따라서 .so파일을 디렉터리에 넣는 것만으로도 충분합니다. pcscd시작 시 해당 디렉터리의 모든 라이브러리를 로드하고 알려진 진입점을 호출하여 일치하는 하드웨어를 검색합니다. 이는 X.org에서 사용하는 것과 동일한 접근 방식입니다. 이는 합리적인 설계이지만 가능한 유일한 설계는 아닙니다.

우데브규칙은 주로 생성하는 데 사용됩니다.장치 파일이를 통해 프로그램은 커널 관리 하드웨어에 액세스하고 이러한 장치 파일에 대한 권한을 설정할 수 있습니다. USB 스마트카드 리더기의 경우 장치 파일을 사용하지 않는 Universal USB Access Interface를 사용하는 것이 아닌 /sys/bus/usb/devices/*.

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