This file is indexed.

/lib/hdparm/hdparm-functions is in hdparm 9.54+ds-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
hdparm_is_on_battery() {
    on_ac_power 2>/dev/null
    [ $? -eq 1 ]
}

hdparm_set_option()
{
  local NEW_OPT= NEW_DEF=
  if test -n "$DISC"; then
    for i in $OPTIONS; do
      if test x${i%${i#??}} != x${1%${1#??}}; then
        NEW_OPT="$NEW_OPT $i"
      else
        NEW_OPT=${NEW_OPT%-q}
      fi
    done
    OPTIONS="$NEW_OPT $OPT_QUIET $1"
  else
    for i in $DEFAULT; do
      if test x${i%${i#??}} != x${1%${1#??}}; then
        NEW_DEF="$NEW_DEF $i"
      else
        NEW_DEF=${NEW_DEF%-q}
      fi
    done
    DEFAULT="$NEW_DEF $DEF_QUIET $1"
  fi
}

hdparm_eval_value()
{
  case $1 in
    off|0)
      hdparm_set_option "$2"0
       ;;
    on|1)
      hdparm_set_option "$2"1
      ;;
    *)
      log_failure_msg "Unknown Value for $2: $1"
      exit 1
      ;;
  esac
}

# It isn't safe to set an APM policy by default on Firewire or USB devices.
# See https://bugs.launchpad.net/bugs/515023.
hdparm_try_apm()
{
    # set our default global apm policy here.
    if [ -z "$ID_PATH" ]; then
        local ID_PATH="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_PATH=//p')" || true
    fi
    case $ID_PATH in
        pci-*-ieee1394-*|pci-*-usb-*)
            return 1
            ;;
    esac

    # Only activate APM on disks that support it.
    if [ -z "$ID_ATA_FEATURE_SET_APM" ]; then
        local ID_ATA_FEATURE_SET_APM="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_ATA_FEATURE_SET_APM=//p')" || true
    fi
    if [ "$ID_ATA_FEATURE_SET_APM" = "1" ]; then
        return 0
    fi
    return 1
}

# parse /etc/hdparm.conf and spit out a list of options for the specified
# disk, taking into account global settings in /etc/hdparm.conf, current AC
# power status, and (as a fallback) the default apm settings on Ubuntu.
# arguments: device_name
# returns 0 on success, 1 on failure.
# options to be passed to hdparm are returned on stdout.
hdparm_options()
{
    local WANTED_DISK="$1"

    local DISC= DEFAULT= DEF_QUIET= COMMAND_LINE=
    # if the below is guaranteed to spawn a subshell, then this next line is
    # unnecessary
    local OPTIONS OPT_QUIET KEY SEP VALUE

    egrep -v '^[[:space:]]*(#|$)' /etc/hdparm.conf |
    {
        # set our default global apm policy here.
        if hdparm_try_apm "$WANTED_DISK"; then
            if hdparm_is_on_battery; then
                hdparm_set_option -B128
		# set a spindown time of 3 minutes by default so the disk isn't
		# constantly power cycling on a busy machine if spindown is
		# enabled
		hdparm_set_option -S36
            else
                hdparm_set_option -B254
            fi
        fi

        while read KEY SEP VALUE; do
            case $SEP in
                '{')
                    case $KEY in
                        command_line)
                            unset DISC
                            unset OPTIONS
                            unset OPT_QUIET
                            COMMAND_LINE=1
                            ;;
                        *)
                            if [ -h "$KEY" ]
                            then
                                DISC=$(readlink -m "$KEY")
                                DISC=${DISC%%[[:digit:]]*}
                            else
                                DISC=$KEY
                            fi
                            OPTIONS=$DEFAULT
                            OPT_QUIET=$DEF_QUIET
                            ;;
                    esac
                    ;;
                =)
                    case $KEY in
                         read_ahead_sect)
                             hdparm_set_option -a$VALUE
                            ;;
                        lookahead)
                            hdparm_eval_value $VALUE -A
                            ;;
                        bus)
                            hdparm_eval_value $VALUE -b
                            ;;
                        apm)
                            if ! hdparm_is_on_battery; then
                                hdparm_set_option -B$VALUE
                            fi
                            ;;
                        apm_battery)
                            if hdparm_is_on_battery; then
                                hdparm_set_option -B$VALUE
                            fi
                            ;;
                        io32_support)
                            hdparm_set_option -c$VALUE
                            ;;
                        dma)
                            hdparm_eval_value $VALUE -d
                            ;;
                        defect_mana)
                            hdparm_eval_value $VALUE -D
                            ;;
                        cd_speed)
                            hdparm_set_option -E$VALUE
                            ;;
                        mult_sect_io)
                            hdparm_set_option -m$VALUE
                            ;;
                        prefetch_sect)
                            hdparm_set_option -P$VALUE
                            ;;
                        read_only)
                            hdparm_eval_value $VALUE -r
                            ;;
                        write_read_verify)
                            hdparm_eval_value $VALUE -R
                            ;;
                        spindown_time)
                            hdparm_set_option -S$VALUE
                            ;;
                        poweron_standby)
                            hdparm_eval_value $VALUE -s
                            ;;
                        interrupt_unmask)
                            hdparm_eval_value $VALUE -u
                            ;;
                        write_cache)
                            hdparm_eval_value $VALUE -W
                            ;;
                        transfer_mode)
                            hdparm_set_option -X$VALUE
                            ;;
                        acoustic_management)
                            hdparm_set_option -M$VALUE
                            ;;
                        keep_settings_over_reset)
                            hdparm_eval_value $VALUE -k
                            ;;
                        keep_features_over_reset)
                            hdparm_eval_value $VALUE -K
                            ;;
                        chipset_pio_mode)
                            hdparm_set_option -p$VALUE
                            ;;
                        security_unlock)
                            hdparm_set_option --security-unlock $VALUE
                            ;;
                        security_pass)
                            hdparm_set_option --security-set-pass $VALUE
                            ;;
                        security_disable)
                            hdparm_set_option --security-disable $VALUE
                            ;;
                        user-master)
                            hdparm_set_option --user-master $VALUE
                            ;;
                        security_mode)
                            hdparm_set_option --security-mode $VALUE
                            ;;
                        ROOTFS)
                            ;;
                        *)
                            echo "Unknown option $KEY"
                            exit 1
                            ;;
                    esac
                    ;;
                "")
                    case $KEY in
                        '}')
                            if [ -z "$DISC" ] && [ -z "$COMMAND_LINE" ]; then
                                echo "No disk enabled. Exiting" >&2
                                return 1
                            fi
                            if [ -n "$OPTIONS" ] && [ "$DISC" = "$WANTED_DISK" ]
                            then
                                echo $OPTIONS
                                return 0
                            fi
                            COMMAND_LINE=
                            ;;
                        quiet)
                            if [ -n "$DISC" ]; then
                                OPT_QUIET=-q
                            else
                                DEF_QUIET=-q
                            fi
                            ;;
                        standby)
                            hdparm_set_option -y
                            ;;
                        sleep)
                            hdparm_set_option -Y
                            ;;
                        disable_seagate)
                            hdparm_set_option -Z
                            ;;
                        security_freeze)
                            hdparm_set_option --security-freeze
                            ;;
                        *)
                            if [ -z "$COMMAND_LINE" ]; then
                                echo "unknown option $KEY" >&2
                                return 1
                            fi
                            ;;
                    esac
                    ;;
                *)
                    if [ -z "$COMMAND_LINE" ]; then
                        echo "unknown separator $SEP" >&2
                        return 1
                    fi
                    ;;
            esac
        done
        # parsed the whole file and didn't find the disk,
        # so try the default instead.
        if [ -n "$DEFAULT" ]; then
            echo $DEFAULT
            return 0
        fi
    }
}