1 | #!/bin/bash |
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2 | #/** |
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3 | #@file ogfunctions.sh |
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4 | #@brief Generic functions for OpenGnsys Server and OpenGnsys Repository. |
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5 | #@version 1.1.1 - Initial version |
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6 | #@author Ramón M. Gómez, ETSII Universidad de Sevilla |
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7 | #@date 2017-10-08 |
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8 | #*/ |
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9 | |
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10 | |
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11 | # Showing an error message. |
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12 | function raiseError() { |
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13 | case "$1" in |
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14 | usage) |
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15 | echo "$PROG: Usage error: Type \"$PROG help\"" >&2 |
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16 | exit 1 ;; |
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17 | notfound) |
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18 | echo "$PROG: Resource not found: $2" >&2 |
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19 | exit 2 ;; |
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20 | access) |
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21 | echo "$PROG: Access error: $2" >&2 |
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22 | exit 3 ;; |
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23 | download) |
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24 | echo "$PROG: Download error: $2" >&2 |
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25 | exit 4 ;; |
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26 | cancel) |
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27 | echo "$PROG: Operation cancelled: $2" >&2 |
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28 | exit 5 ;; |
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29 | *) |
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30 | echo "$PROG: Unknown error" >&2 |
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31 | exit 1 ;; |
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32 | esac |
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33 | } |
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34 | |
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35 | # Showing help message. |
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36 | function help() { |
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37 | [ -n "$1" ] && DESCRIPTION="$1" || DESCRIPTION=$(grep "^#@brief" "$0" | cut -f2- -d" ") |
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38 | shift |
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39 | if [ -n "$1" ]; then |
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40 | USAGE="$1" |
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41 | shift |
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42 | else |
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43 | USAGE=$(grep "^#@usage" "$0" | cut -f2- -d" ") |
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44 | [ -n "$USAGE" ] && PARAMS=$(awk '$1=="#@param" {sub($1,""); print "\t",$0}' "$0") |
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45 | fi |
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46 | # Showing help. |
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47 | echo "$PROG: ${DESCRIPTION:-"no description"}" |
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48 | echo "Usage: ${USAGE:-"no usage info"}" |
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49 | [ -n "$PARAMS" ] && echo -e "$PARAMS" |
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50 | if [ -n "$*" ]; then |
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51 | echo "Examples:" |
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52 | while (( "$#" )); do |
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53 | echo -e "\t$1" |
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54 | shift |
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55 | done |
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56 | fi |
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57 | exit 0 |
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58 | } |
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59 | |
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60 | # Functions to manage a service. |
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61 | function restart() { |
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62 | _service restart "$1" |
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63 | } |
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64 | function start() { |
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65 | _service start "$1" |
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66 | } |
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67 | function stop() { |
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68 | _service stop "$1" |
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69 | } |
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70 | |
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71 | # Execute database operation. |
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72 | function dbexec () { |
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73 | MYCNF=$(mktemp) |
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74 | trap "rm -f $MYCNF" 0 1 2 3 6 9 15 |
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75 | touch $MYCNF |
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76 | chmod 600 $MYCNF |
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77 | cat << EOT > $MYCNF |
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78 | [client] |
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79 | user=$USUARIO |
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80 | password=$PASSWORD |
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81 | EOT |
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82 | mysql --defaults-extra-file="$MYCNF" -D "$CATALOG" -s -N -e "$1" || \ |
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83 | raiseError access "Cannot access the databse" |
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84 | rm -f "$MYCNF" |
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85 | } |
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86 | |
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87 | |
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88 | ### Meta-functions and private functions. |
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89 | |
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90 | # Metafunction to check if JSON result exists. |
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91 | JQ=$(which jq 2>/dev/null) || raiseError notfound "Need to install \"jq\"." |
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92 | function jq() { |
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93 | local OUTPUT |
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94 | OUTPUT=$($JQ "$@") || return $? |
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95 | [[ "$OUTPUT" = "null" ]] && return 1 |
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96 | echo "$OUTPUT" |
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97 | } |
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98 | |
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99 | # Private function to acts on a service (do not use directly). |
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100 | function _service() { |
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101 | local ACTION="$1" |
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102 | local SERVICE="$2" |
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103 | if which systemctl 2>/dev/null; then |
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104 | systemctl "$ACTION" "$SERVICE" |
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105 | elif which service 2>/dev/null; then |
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106 | service "$SERVICE" "$ACTION" |
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107 | elif [ -x /etc/init.d/"$SERVICE" ]; then |
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108 | /etc/init.d/"$SERVICE" "$ACTION" |
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109 | else |
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110 | raiseError notfound "Service $SERVICE" |
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111 | fi |
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112 | } |
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113 | |
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