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
|
#!/bin/sh
###############################################################################
# BRLTTY - A background process providing access to the console screen (when in
# text mode) for a blind person using a refreshable braille display.
#
# Copyright (C) 1995-2025 by The BRLTTY Developers.
#
# BRLTTY comes with ABSOLUTELY NO WARRANTY.
#
# This is free software, placed under the terms of the
# GNU Lesser General Public License, as published by the Free Software
# Foundation; either version 2.1 of the License, or (at your option) any
# later version. Please see the file LICENSE-LGPL for details.
#
# Web Page: http://brltty.app/
#
# This software is maintained by Dave Mielke <dave@mielke.cc>.
###############################################################################
# Convert the boot parameter to configuration file directives.
# If /proc is mounted then use the brltty= boot parameter in /proc/cmdline.
# If /proc is not mounted then use the brltty environment variable.
# Invoke with -h for usage information.
programName="${0##*/}"
programMessage()
{
echo 2>&1 "${programName}: ${1}"
}
syntaxError()
{
programMessage "${1}"
exit 2
}
internalError()
{
programMessage "${1}"
exit 3
}
configurationFile=""
requestedAction=create
deviceTranslation=none
requestedParameter=""
OPTIND=1
while getopts ":f:cundop:h" option
do
case "${option}"
in
f) configurationFile="${OPTARG}";;
c) requestedAction=create;;
u) requestedAction=update;;
n) deviceTranslation=none;;
d) deviceTranslation=devfs;;
o) deviceTranslation=old;;
p) requestedParameter="${OPTARG}";;
h)
cat <<EOF
Usage: ${programName} [option ...]
-f file The configuration file to create/update.
-c Create the configuration file (write to stdout if no -f).
-u Update the configuration file (copying from stdin to stdout if no -f).
-n Do not translate device paths.
-d Do old-style to devfs device path translation.
-o Do devfs to old-style device path translation.
-p [driver][,[device][,[table]]]
Explicitly specify the boot parameter.
-h Display this usage summary.
EOF
exit 0
;;
\?) syntaxError "unknown option: -${OPTARG}";;
:) syntaxError "missing value: -${OPTARG}";;
*) internalError "unimplemented option: -${option}";;
esac
done
shift "`expr $OPTIND - 1`"
[ "${#}" -eq 0 ] || syntaxError "too many parameters."
case "${requestedAction}"
in
create)
putConfigurationLine()
{
echo "${1}" || exit 4
}
startConfigurationFile()
{
[ -n "${configurationFile}" ] && exec >"${configurationFile}"
putConfigurationLine "`makeHeaderLine Created`"
putConfigurationLine "`makeParameterLine`"
putConfigurationLine ""
}
putConfigurationDirective()
{
putConfigurationLine "${1} ${2}"
}
finalizeConfigurationFile()
{
:
}
;;
update)
putSedCommand()
{
sedScript="${sedScript}
${1}"
}
startConfigurationFile()
{
if [ -n "${configurationFile}" ]
then
[ -e "${configurationFile}" ] || syntaxError "file not found: ${configurationFile}"
[ -f "${configurationFile}" ] || syntaxError "not a file: ${configurationFile}"
[ -r "${configurationFile}" ] || syntaxError "file not readable: ${configurationFile}"
[ -w "${configurationFile}" ] || syntaxError "file not writable: ${configurationFile}"
outputFile="${configurationFile}.new"
exec <"${configurationFile}" >"${outputFile}"
fi
sedScript=""
putSedCommand "\$a\\
\\
`makeHeaderLine Updated`\\
`makeParameterLine`\\
"
}
putConfigurationDirective()
{
value="`echo "${2}" | sed -e 's%\\([/\\]\\)%\\\\\\1%g'`"
putSedCommand "/^[[:space:]]*${1}[[:space:]]/s/^/#/"
putSedCommand "\$a${1} ${value}"
}
finalizeConfigurationFile()
{
sed -e "${sedScript}"
[ -n "${outputFile}" ] && mv -f "${outputFile}" "${configurationFile}"
}
;;
*) internalError "unimplemented action: ${requestedAction}";;
esac
translateDevice_none()
{
:
}
translateDevice_devfs()
{
minor="${device#ttyS}"
if [ "${minor}" != "${device}" ]
then
device="tts/${minor}"
return 0
fi
minor="${device#lp}"
if [ "${minor}" != "${device}" ]
then
device="printers/${minor}"
return 0
fi
programMessage "unsupported old-style device: ${device}"
}
translateDevice_old()
{
major="${device%%/*}"
if [ "${major}" != "${device}" ]
then
minor="${device#*/}"
case "${major}"
in
tts) devfs="ttyS${minor}";;
printers) devfs="lp${minor}";;
esac
fi
if [ -n "${devfs}" ]
then
device="${devfs}"
else
programMessage "unsupported devfs device: ${device}"
fi
}
makeHeaderLine()
{
echo "# ${1} by brltty-bp2cf`date +' on %Y-%m-%d at %H:%M:%S %Z (UTC%z)'`."
}
makeParameterLine()
{
echo "# Boot Parameter:${bootParameter}"
}
putConfigurationFile()
{
startConfigurationFile
[ -n "${brailleDriver}" ] && putConfigurationDirective "braille-driver" "${brailleDriver}"
[ -n "${brailleDevice}" ] && {
device="`echo "${brailleDevice}" | sed -e 's%//*%/%g' -e 's%^/dev/%%'`"
if [ "${device#/}" = "${device}" ]
then
translateDevice_${deviceTranslation}
fi
putConfigurationDirective "braille-device" "${device}"
}
[ -n "${textTable}" ] && putConfigurationDirective "text-table" "${textTable}"
finalizeConfigurationFile
}
parseBootParameter()
{
bootParameter="${bootParameter} ${1}"
number=1
while [ "${number}" -le 3 ]
do
cut="cut -d, -f${number}"
[ "${number}" -gt 1 ] && cut="${cut} -s"
operand="`echo ${1} | ${cut}`"
if [ -n "${operand}" ]
then
case "${number}"
in
1) brailleDriver="${operand}";;
2) brailleDevice="${operand}";;
3) textTable="${operand}";;
esac
fi
number="`expr ${number} + 1`"
done
}
putBootParameter()
{
parseBootParameter "${1}"
putConfigurationFile
}
parseBootCommand()
{
found=false
while [ "${#}" -gt 0 ]
do
case "${1}"
in
"brltty="*)
found=true
parseBootParameter "${1#*=}"
;;
esac
shift
done
"${found}" && putConfigurationFile
}
brailleDriver=""
brailleDevice=""
textTable=""
bootCommandFile="/proc/cmdline"
if [ -n "${requestedParameter}" ]
then
putBootParameter "${requestedParameter}"
elif [ -f "${bootCommandFile}" ]
then
parseBootCommand `cat "${bootCommandFile}"`
elif [ -n "${brltty}" ]
then
putBootParameter "${brltty}"
fi
exit 0
|
