Root/package/base-files/files/lib/functions.sh

1#!/bin/sh
2# Copyright (C) 2006-2011 OpenWrt.org
3# Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
4
5
6debug () {
7    ${DEBUG:-:} "$@"
8}
9mount() {
10    busybox mount "$@"
11}
12
13# newline
14N="
15"
16
17_C=0
18NO_EXPORT=1
19LOAD_STATE=1
20LIST_SEP=" "
21
22hotplug_dev() {
23    env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug-call net
24}
25
26append() {
27    local var="$1"
28    local value="$2"
29    local sep="${3:- }"
30
31    eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
32}
33
34list_contains() {
35    local var="$1"
36    local str="$2"
37    local val
38
39    eval "val=\" \${$var} \""
40    [ "${val%% $str *}" != "$val" ]
41}
42
43list_remove() {
44    local var="$1"
45    local remove="$2"
46    local val
47
48    eval "val=\" \${$var} \""
49    val1="${val%% $remove *}"
50    [ "$val1" = "$val" ] && return
51    val2="${val##* $remove }"
52    [ "$val2" = "$val" ] && return
53    val="${val1## } ${val2%% }"
54    val="${val%% }"
55    eval "export ${NO_EXPORT:+-n} -- \"$var=\$val\""
56}
57
58config_load() {
59    [ -n "$IPKG_INSTROOT" ] && return 0
60    uci_load "$@"
61}
62
63reset_cb() {
64    config_cb() { return 0; }
65    option_cb() { return 0; }
66    list_cb() { return 0; }
67}
68reset_cb
69
70package() {
71    return 0
72}
73
74config () {
75    local cfgtype="$1"
76    local name="$2"
77
78    export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
79    name="${name:-cfg$CONFIG_NUM_SECTIONS}"
80    append CONFIG_SECTIONS "$name"
81    [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
82    export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
83    export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
84}
85
86option () {
87    local varname="$1"; shift
88    local value="$*"
89
90    export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
91    [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
92}
93
94list() {
95    local varname="$1"; shift
96    local value="$*"
97    local len
98
99    config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
100    [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
101    len=$(($len + 1))
102    config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
103    config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
104    append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
105    list_cb "$varname" "$*"
106}
107
108config_rename() {
109    local OLD="$1"
110    local NEW="$2"
111    local oldvar
112    local newvar
113
114    [ -n "$OLD" -a -n "$NEW" ] || return
115    for oldvar in `set | grep ^CONFIG_${OLD}_ | \
116        sed -e 's/\(.*\)=.*$/\1/'` ; do
117        newvar="CONFIG_${NEW}_${oldvar##CONFIG_${OLD}_}"
118        eval "export ${NO_EXPORT:+-n} \"$newvar=\${$oldvar}\""
119        unset "$oldvar"
120    done
121    export ${NO_EXPORT:+-n} CONFIG_SECTIONS="$(echo " $CONFIG_SECTIONS " | sed -e "s, $OLD , $NEW ,")"
122
123    [ "$CONFIG_SECTION" = "$OLD" ] && export ${NO_EXPORT:+-n} CONFIG_SECTION="$NEW"
124}
125
126config_unset() {
127    config_set "$1" "$2" ""
128}
129
130config_clear() {
131    local SECTION="$1"
132    local oldvar
133
134    list_remove CONFIG_SECTIONS "$SECTION"
135    export ${NO_EXPORT:+-n} CONFIG_SECTIONS="${SECTION:+$CONFIG_SECTIONS}"
136
137    for oldvar in `set | grep ^CONFIG_${SECTION:+${SECTION}_} | \
138        sed -e 's/\(.*\)=.*$/\1/'` ; do
139        unset $oldvar
140    done
141}
142
143# config_get <variable> <section> <option> [<default>]
144# config_get <section> <option>
145config_get() {
146    case "$3" in
147        "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
148        *) eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
149    esac
150}
151
152# config_get_bool <variable> <section> <option> [<default>]
153config_get_bool() {
154    local _tmp
155    config_get _tmp "$2" "$3" "$4"
156    case "$_tmp" in
157        1|on|true|enabled) _tmp=1;;
158        0|off|false|disabled) _tmp=0;;
159        *) _tmp="$4";;
160    esac
161    export ${NO_EXPORT:+-n} "$1=$_tmp"
162}
163
164config_set() {
165    local section="$1"
166    local option="$2"
167    local value="$3"
168    local old_section="$CONFIG_SECTION"
169
170    CONFIG_SECTION="$section"
171    option "$option" "$value"
172    CONFIG_SECTION="$old_section"
173}
174
175config_foreach() {
176    local function="$1"
177    [ "$#" -ge 1 ] && shift
178    local type="$1"
179    [ "$#" -ge 1 ] && shift
180    local section cfgtype
181
182    [ -z "$CONFIG_SECTIONS" ] && return 0
183    for section in ${CONFIG_SECTIONS}; do
184        config_get cfgtype "$section" TYPE
185        [ -n "$type" -a "x$cfgtype" != "x$type" ] && continue
186        eval "$function \"\$section\" \"\$@\""
187    done
188}
189
190config_list_foreach() {
191    [ "$#" -ge 3 ] || return 0
192    local section="$1"; shift
193    local option="$1"; shift
194    local function="$1"; shift
195    local val
196    local len
197    local c=1
198
199    config_get len "${section}" "${option}_LENGTH"
200    [ -z "$len" ] && return 0
201    while [ $c -le "$len" ]; do
202        config_get val "${section}" "${option}_ITEM$c"
203        eval "$function \"\$val\" \"$@\""
204        c="$(($c + 1))"
205    done
206}
207
208load_modules() {
209    [ -d /etc/modules.d ] && {
210        cd /etc/modules.d
211        sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
212    }
213}
214
215include() {
216    local file
217
218    for file in $(ls $1/*.sh 2>/dev/null); do
219        . $file
220    done
221}
222
223find_mtd_part() {
224    local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
225    local PREFIX=/dev/mtdblock
226
227    PART="${PART##mtd}"
228    [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
229    echo "${PART:+$PREFIX$PART}"
230}
231
232strtok() { # <string> { <variable> [<separator>] ... }
233    local tmp
234    local val="$1"
235    local count=0
236
237    shift
238
239    while [ $# -gt 1 ]; do
240        tmp="${val%%$2*}"
241
242        [ "$tmp" = "$val" ] && break
243
244        val="${val#$tmp$2}"
245
246        export ${NO_EXPORT:+-n} "$1=$tmp"; count=$((count+1))
247        shift 2
248    done
249
250    if [ $# -gt 0 -a -n "$val" ]; then
251        export ${NO_EXPORT:+-n} "$1=$val"; count=$((count+1))
252    fi
253
254    return $count
255}
256
257
258jffs2_mark_erase() {
259    local part="$(find_mtd_part "$1")"
260    [ -z "$part" ] && {
261        echo Partition not found.
262        return 1
263    }
264    echo -e "\xde\xad\xc0\xde" | mtd -qq write - "$1"
265}
266
267uci_apply_defaults() {
268    cd /etc/uci-defaults || return 0
269    files="$(ls)"
270    [ -z "$files" ] && return 0
271    mkdir -p /tmp/.uci
272    for file in $files; do
273        ( . "./$(basename $file)" ) && rm -f "$file"
274    done
275    uci commit
276}
277
278#
279# service: simple wrapper around start-stop-daemon
280#
281# Usage: service ACTION EXEC ARGS...
282#
283# Action:
284# -C check if EXEC is alive
285# -S start EXEC, passing it ARGS as its arguments
286# -K kill EXEC, sending it a TERM signal if not specified otherwise
287#
288# Environment variables exposed:
289# SERVICE_DAEMONIZE run EXEC in background
290# SERVICE_WRITE_PID create a pid-file and use it for matching
291# SERVICE_MATCH_EXEC use EXEC command-line for matching (default)
292# SERVICE_MATCH_NAME use EXEC process name for matching
293# SERVICE_USE_PID assume EXEC create its own pid-file and use it for matching
294# SERVICE_NAME process name to use (default to EXEC file part)
295# SERVICE_PID_FILE pid file to use (default to /var/run/$SERVICE_NAME.pid)
296# SERVICE_SIG signal to send when using -K
297# SERVICE_SIG_RELOAD default signal used when reloading
298# SERVICE_SIG_STOP default signal used when stopping
299# SERVICE_STOP_TIME time to wait for a process to stop gracefully before killing it
300# SERVICE_UID user EXEC should be run as
301# SERVICE_GID group EXEC should be run as
302#
303# SERVICE_DEBUG don't do anything, but show what would be done
304# SERVICE_QUIET don't print anything
305#
306
307SERVICE_QUIET=1
308SERVICE_SIG_RELOAD="HUP"
309SERVICE_SIG_STOP="TERM"
310SERVICE_STOP_TIME=5
311SERVICE_MATCH_EXEC=1
312
313service() {
314    local ssd
315    local exec
316    local name
317    local start
318    ssd="${SERVICE_DEBUG:+echo }start-stop-daemon${SERVICE_QUIET:+ -q}"
319    case "$1" in
320      -C)
321        ssd="$ssd -K -t"
322        ;;
323      -S)
324        ssd="$ssd -S${SERVICE_DAEMONIZE:+ -b}${SERVICE_WRITE_PID:+ -m}"
325        start=1
326        ;;
327      -K)
328        ssd="$ssd -K${SERVICE_SIG:+ -s $SERVICE_SIG}"
329        ;;
330      *)
331        echo "service: unknown ACTION '$1'" 1>&2
332        return 1
333    esac
334    shift
335    exec="$1"
336    [ -n "$exec" ] || {
337        echo "service: missing argument" 1>&2
338        return 1
339    }
340    [ -x "$exec" ] || {
341        echo "service: file '$exec' is not executable" 1>&2
342        return 1
343    }
344    name="${SERVICE_NAME:-${exec##*/}}"
345    [ -z "$SERVICE_USE_PID$SERVICE_WRITE_PID$SERVICE_PID_FILE" ] \
346        || ssd="$ssd -p ${SERVICE_PID_FILE:-/var/run/$name.pid}"
347    [ -z "$SERVICE_MATCH_NAME" ] || ssd="$ssd -n $name"
348    ssd="$ssd${SERVICE_UID:+ -c $SERVICE_UID${SERVICE_GID:+:$SERVICE_GID}}"
349    [ -z "$SERVICE_MATCH_EXEC$start" ] || ssd="$ssd -x $exec"
350    shift
351    $ssd${1:+ -- "$@"}
352}
353
354service_check() {
355    service -C "$@"
356}
357
358service_signal() {
359    SERVICE_SIG="${SERVICE_SIG:-USR1}" service -K "$@"
360}
361
362service_start() {
363    service -S "$@"
364}
365
366service_stop() {
367    local try
368    SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_STOP}" service -K "$@" || return 1
369    while [ $((try++)) -lt $SERVICE_STOP_TIME ]; do
370        service -C "$@" || return 0
371        sleep 1
372    done
373    SERVICE_SIG="KILL" service -K "$@"
374    sleep 1
375    ! service -C "$@"
376}
377
378service_reload() {
379    SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_RELOAD}" service -K "$@"
380}
381
382service_kill() {
383    cat 1>&2 << __END_OF_WARNING__
384#
385# WARNING: the 'service_kill' function is now deprecated and might be
386# removed soon. Consider using the other new service_* wrappers instead.
387#
388__END_OF_WARNING__
389    local name="${1}"
390    local pid="${2:-$(pidof "$name")}"
391    local grace="${3:-5}"
392
393    [ -f "$pid" ] && pid="$(head -n1 "$pid" 2>/dev/null)"
394
395    for pid in $pid; do
396        [ -d "/proc/$pid" ] || continue
397        local try=0
398        kill -TERM $pid 2>/dev/null && \
399            while grep -qs "$name" "/proc/$pid/cmdline" && [ $((try++)) -lt $grace ]; do sleep 1; done
400        kill -KILL $pid 2>/dev/null && \
401            while grep -qs "$name" "/proc/$pid/cmdline"; do sleep 1; done
402    done
403}
404
405
406group_add() {
407    local name="$1"
408    local gid="$2"
409    local rc
410    [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
411    [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
412    echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
413    rc=$?
414    [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
415    return $rc
416}
417
418group_exists() {
419    grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
420}
421
422user_add() {
423    local name="${1}"
424    local uid="${2}"
425    local gid="${3:-$2}"
426    local desc="${4:-$1}"
427    local home="${5:-/var/run/$1}"
428    local shell="${6:-/bin/false}"
429    local rc
430    [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
431    [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
432    echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
433    rc=$?
434    [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
435    return $rc
436}
437
438user_exists() {
439    grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
440}
441
442
443pi_include() {
444    if [ -f "/tmp/overlay/$1" ]; then
445        . "/tmp/overlay/$1"
446    elif [ -f "$1" ]; then
447        . "$1"
448    elif [ -d "/tmp/overlay/$1" ]; then
449        if [ -n "$(ls /tmp/overlay/$1/*.sh 2>/dev/null)" ]; then
450            for src_script in /tmp/overlay/$1/*.sh; do
451                . "$src_script"
452            done
453        fi
454    elif [ -d "$1" ]; then
455        if [ -n "$(ls $1/*.sh 2>/dev/null)" ]; then
456            for src_script in $1/*.sh; do
457                . "$src_script"
458            done
459        fi
460    else
461        echo "WARNING: $1 not found"
462        return 1
463    fi
464    return 0
465}
466
467[ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh
468

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