OpenWrt – Blame information for rev 2
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1 | office | 1 | # |
2 | # service: simple wrapper around start-stop-daemon |
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3 | # |
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4 | # Usage: service ACTION EXEC ARGS... |
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5 | # |
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6 | # Action: |
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7 | # -C check if EXEC is alive |
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8 | # -S start EXEC, passing it ARGS as its arguments |
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9 | # -K kill EXEC, sending it a TERM signal if not specified otherwise |
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10 | # |
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11 | # Environment variables exposed: |
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12 | # SERVICE_DAEMONIZE run EXEC in background |
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13 | # SERVICE_WRITE_PID create a pid-file and use it for matching |
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14 | # SERVICE_MATCH_EXEC use EXEC command-line for matching (default) |
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15 | # SERVICE_MATCH_NAME use EXEC process name for matching |
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16 | # SERVICE_USE_PID assume EXEC create its own pid-file and use it for matching |
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17 | # SERVICE_NAME process name to use (default to EXEC file part) |
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18 | # SERVICE_PID_FILE pid file to use (default to /var/run/$SERVICE_NAME.pid) |
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19 | # SERVICE_SIG signal to send when using -K |
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20 | # SERVICE_SIG_RELOAD default signal used when reloading |
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21 | # SERVICE_SIG_STOP default signal used when stopping |
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22 | # SERVICE_STOP_TIME time to wait for a process to stop gracefully before killing it |
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23 | # SERVICE_UID user EXEC should be run as |
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24 | # SERVICE_GID group EXEC should be run as |
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25 | # |
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26 | # SERVICE_DEBUG don't do anything, but show what would be done |
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27 | # SERVICE_QUIET don't print anything |
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28 | # |
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29 | |||
30 | SERVICE_QUIET=1 |
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31 | SERVICE_SIG_RELOAD="HUP" |
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32 | SERVICE_SIG_STOP="TERM" |
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33 | SERVICE_STOP_TIME=5 |
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34 | SERVICE_MATCH_EXEC=1 |
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35 | |||
36 | service() { |
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37 | local ssd |
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38 | local exec |
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39 | local name |
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40 | local start |
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41 | ssd="${SERVICE_DEBUG:+echo }start-stop-daemon${SERVICE_QUIET:+ -q}" |
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42 | case "$1" in |
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43 | -C) |
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44 | ssd="$ssd -K -t" |
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45 | ;; |
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46 | -S) |
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47 | ssd="$ssd -S${SERVICE_DAEMONIZE:+ -b}${SERVICE_WRITE_PID:+ -m}" |
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48 | start=1 |
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49 | ;; |
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50 | -K) |
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51 | ssd="$ssd -K${SERVICE_SIG:+ -s $SERVICE_SIG}" |
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52 | ;; |
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53 | *) |
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54 | echo "service: unknown ACTION '$1'" 1>&2 |
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55 | return 1 |
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56 | esac |
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57 | shift |
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58 | exec="$1" |
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59 | [ -n "$exec" ] || { |
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60 | echo "service: missing argument" 1>&2 |
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61 | return 1 |
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62 | } |
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63 | [ -x "$exec" ] || { |
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64 | echo "service: file '$exec' is not executable" 1>&2 |
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65 | return 1 |
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66 | } |
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67 | name="${SERVICE_NAME:-${exec##*/}}" |
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68 | [ -z "$SERVICE_USE_PID$SERVICE_WRITE_PID$SERVICE_PID_FILE" ] \ |
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69 | || ssd="$ssd -p ${SERVICE_PID_FILE:-/var/run/$name.pid}" |
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70 | [ -z "$SERVICE_MATCH_NAME" ] || ssd="$ssd -n $name" |
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71 | ssd="$ssd${SERVICE_UID:+ -c $SERVICE_UID${SERVICE_GID:+:$SERVICE_GID}}" |
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72 | [ -z "$SERVICE_MATCH_EXEC$start" ] || ssd="$ssd -x $exec" |
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73 | shift |
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74 | $ssd${1:+ -- "$@"} |
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75 | } |
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76 | |||
77 | service_check() { |
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78 | service -C "$@" |
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79 | } |
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80 | |||
81 | service_signal() { |
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82 | SERVICE_SIG="${SERVICE_SIG:-USR1}" service -K "$@" |
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83 | } |
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84 | |||
85 | service_start() { |
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86 | service -S "$@" |
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87 | } |
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88 | |||
89 | service_stop() { |
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90 | local try |
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91 | SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_STOP}" service -K "$@" || return 1 |
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92 | while [ $((try++)) -lt $SERVICE_STOP_TIME ]; do |
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93 | service -C "$@" || return 0 |
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94 | sleep 1 |
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95 | done |
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96 | SERVICE_SIG="KILL" service -K "$@" |
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97 | sleep 1 |
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98 | ! service -C "$@" |
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99 | } |
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100 | |||
101 | service_reload() { |
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102 | SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_RELOAD}" service -K "$@" |
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103 | } |