Commit | Line | Data |
---|---|---|
8f055f6f SBS |
1 | #!/bin/bash |
2 | # Desc: Prints latest block from bitcoin-cli | |
3 | # Usage: bkbtcblockclock | |
4 | # Output: stdout: timestamped block numbers | |
5 | # Depends: bitcoin-cli (from bitcoind), jq, gnu coreutils 8.30 | |
6 | # Version: 0.0.1 | |
7 | ||
8 | #==BEGIN Define script parameters== | |
9 | delay="1" | |
10 | #===BEGIN Define variables=== | |
11 | declare -Ag appRollCall # Associative array for storing app status | |
12 | declare -Ag fileRollCall # Associative array for storing file status | |
13 | declare -Ag dirRollCall # Associative array for storing dir status | |
14 | #===END Define variables=== | |
15 | ||
16 | ||
17 | #===BEGIN Declare local script functions=== | |
18 | yell() { echo "$0: $*" >&2; } # print script path and all args to stderr | |
19 | die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status | |
20 | try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails | |
21 | checkapp() { | |
22 | # Desc: If arg is a command, save result in assoc array 'appRollCall' | |
23 | # Usage: checkapp arg1 arg2 arg3 ... | |
24 | # Version: 0.1.1 | |
25 | # Input: global assoc. array 'appRollCall' | |
26 | # Output: adds/updates key(value) to global assoc array 'appRollCall' | |
27 | # Depends: bash 5.0.3 | |
28 | local returnState | |
29 | ||
30 | #===Process Args=== | |
31 | for arg in "$@"; do | |
32 | if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command | |
33 | appRollCall[$arg]="true"; | |
34 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; | |
35 | else | |
36 | appRollCall[$arg]="false"; returnState="false"; | |
37 | fi; | |
38 | done; | |
39 | ||
40 | #===Determine function return code=== | |
41 | if [ "$returnState" = "true" ]; then | |
42 | return 0; | |
43 | else | |
44 | return 1; | |
45 | fi; | |
46 | } # Check that app exists | |
47 | checkfile() { | |
48 | # Desc: If arg is a file path, save result in assoc array 'fileRollCall' | |
49 | # Usage: checkfile arg1 arg2 arg3 ... | |
50 | # Version: 0.1.1 | |
51 | # Input: global assoc. array 'fileRollCall' | |
52 | # Output: adds/updates key(value) to global assoc array 'fileRollCall'; | |
53 | # Output: returns 0 if app found, 1 otherwise | |
54 | # Depends: bash 5.0.3 | |
55 | local returnState | |
56 | ||
57 | #===Process Args=== | |
58 | for arg in "$@"; do | |
59 | if [ -f "$arg" ]; then | |
60 | fileRollCall["$arg"]="true"; | |
61 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; | |
62 | else | |
63 | fileRollCall["$arg"]="false"; returnState="false"; | |
64 | fi; | |
65 | done; | |
66 | ||
67 | #===Determine function return code=== | |
68 | if [ "$returnState" = "true" ]; then | |
69 | return 0; | |
70 | else | |
71 | return 1; | |
72 | fi; | |
73 | } # Check that file exists | |
74 | checkdir() { | |
75 | # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' | |
76 | # Usage: checkdir arg1 arg2 arg3 ... | |
77 | # Version 0.1.1 | |
78 | # Input: global assoc. array 'dirRollCall' | |
79 | # Output: adds/updates key(value) to global assoc array 'dirRollCall'; | |
80 | # Output: returns 0 if app found, 1 otherwise | |
81 | # Depends: Bash 5.0.3 | |
82 | local returnState | |
83 | ||
84 | #===Process Args=== | |
85 | for arg in "$@"; do | |
86 | if [ -d "$arg" ]; then | |
87 | dirRollCall["$arg"]="true"; | |
88 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi | |
89 | else | |
90 | dirRollCall["$arg"]="false"; returnState="false"; | |
91 | fi | |
92 | done | |
93 | ||
94 | #===Determine function return code=== | |
95 | if [ "$returnState" = "true" ]; then | |
96 | return 0; | |
97 | else | |
98 | return 1; | |
99 | fi | |
100 | } # Check that dir exists | |
101 | displayMissing() { | |
102 | # Desc: Displays missing apps, files, and dirs | |
103 | # Usage: displayMissing | |
104 | # Version 0.1.1 | |
105 | # Input: associative arrays: appRollCall, fileRollCall, dirRollCall | |
106 | # Output: stderr: messages indicating missing apps, file, or dirs | |
107 | # Depends: bash 5, checkAppFileDir() | |
108 | local missingApps value appMissing missingFiles fileMissing | |
109 | local missingDirs dirMissing | |
110 | ||
111 | #==BEGIN Display errors== | |
112 | #===BEGIN Display Missing Apps=== | |
113 | missingApps="Missing apps :"; | |
114 | #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done | |
115 | for key in "${!appRollCall[@]}"; do | |
116 | value="${appRollCall[$key]}"; | |
117 | if [ "$value" = "false" ]; then | |
118 | #echo "DEBUG:Missing apps: $key => $value"; | |
119 | missingApps="$missingApps""$key "; | |
120 | appMissing="true"; | |
121 | fi; | |
122 | done; | |
123 | if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing. | |
124 | echo "$missingApps" 1>&2; | |
125 | fi; | |
126 | unset value; | |
127 | #===END Display Missing Apps=== | |
128 | ||
129 | #===BEGIN Display Missing Files=== | |
130 | missingFiles="Missing files:"; | |
131 | #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done | |
132 | for key in "${!fileRollCall[@]}"; do | |
133 | value="${fileRollCall[$key]}"; | |
134 | if [ "$value" = "false" ]; then | |
135 | #echo "DEBUG:Missing files: $key => $value"; | |
136 | missingFiles="$missingFiles""$key "; | |
137 | fileMissing="true"; | |
138 | fi; | |
139 | done; | |
140 | if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing. | |
141 | echo "$missingFiles" 1>&2; | |
142 | fi; | |
143 | unset value; | |
144 | #===END Display Missing Files=== | |
145 | ||
146 | #===BEGIN Display Missing Directories=== | |
147 | missingDirs="Missing dirs:"; | |
148 | #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done | |
149 | for key in "${!dirRollCall[@]}"; do | |
150 | value="${dirRollCall[$key]}"; | |
151 | if [ "$value" = "false" ]; then | |
152 | #echo "DEBUG:Missing dirs: $key => $value"; | |
153 | missingDirs="$missingDirs""$key "; | |
154 | dirMissing="true"; | |
155 | fi; | |
156 | done; | |
157 | if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing. | |
158 | echo "$missingDirs" 1>&2; | |
159 | fi; | |
160 | unset value; | |
161 | #===END Display Missing Directories=== | |
162 | ||
163 | #==END Display errors== | |
164 | } # Display missing apps, files, dirs | |
165 | getBlockNum() { | |
166 | # depends: yell(), die(), try() | |
167 | blockNum="$(try bitcoin-cli getblockchaininfo | try jq '."headers"')" | |
168 | echo "$blockNum"; | |
169 | } | |
170 | printNum() { | |
171 | # depends: yell(), die(), try() | |
172 | # usage printNum arg1 | |
173 | echo "[$(date --iso-8601=seconds)]:$1" | |
174 | } | |
175 | main() { | |
176 | # Depends: bitcoin-cli (from bitcoind) | |
177 | # Depends: getBlockNum(), printNum() | |
178 | ||
179 | # Check dependencies | |
180 | if ! checkapp bitcoin-cli jq date; then | |
181 | yell "ERROR:Apps missing." >&2; | |
182 | displayMissing; | |
183 | exit 1; | |
184 | fi; | |
185 | ||
186 | lastBlock="$(getBlockNum)"; | |
187 | printNum "$lastBlock"; | |
188 | #echo "$lastBlock"; | |
189 | n=0; | |
190 | while true; do | |
191 | # update latestBlock | |
192 | latestBlock="$(getBlockNum)"; | |
193 | ||
194 | # compare last and latestBlock | |
195 | if [[ $latestBlock -gt $lastBlock ]]; then | |
196 | ## true: new block | |
197 | ## print block | |
198 | printNum "$latestBlock"; | |
199 | #echo "$(date --iso-8601=seconds)":"$latestBlock" | |
200 | ## update lastBlock | |
201 | lastBlock="$latestBlock" | |
202 | : | |
203 | else | |
204 | ## no new block | |
205 | sleep "$delay" | |
206 | fi; | |
207 | # update counter | |
208 | ((n++)); | |
209 | done; | |
210 | } | |
211 | #===END Declare local script functions=== | |
212 | #==END Define script parameters== | |
213 | ||
214 | main "$@"; | |
215 | ||
216 | # Author: Steven Baltakatei Sandoval | |
217 | # License: GPLv3+ |