migration

check_checksums.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+# file paths
+sha256_file_path=./checksums.sha256
+md5_file_path=./checksums.md5
+error_log=./checksums_error.log
+
+# text colors
+RED='\e[31m'
+GREEN='\e[32m'
+RESET='\e[0m'
+
+# set these false at the start to be safe
+checksha256=false
+checkmd5=false
+
+# output errors to error log
+exec 2> >(tee -a "$error_log" >&2)
+
+# environment checks
+## check for presence of $sha256_file_path, fail with general error on error
+if [ ! -f "$sha256_file_path" ]; then
+    echo -e "\n${RED}FAIL!${RESET} File $sha256_file_path Not Found!\n" >&2
+    exit 1 
+fi
+## check if $sha256_file_path is writable
+if [ ! -r "$sha256_file_path" ]; then
+    echo -e "\n${RED}FAIL!${RESET} File $sha256_file_path Exists But Not Readable!\n" >&2
+    exit 1
+fi
+## check for presence of $md5_file_path, fail with general error on error
+if [ ! -f "$md5_file_path" ]; then 
+    echo -e "\nFAIL! File $md5_file_path Not Found!\n" >&2
+    exit 1
+fi
+## check if $md5_file_path is writable
+if [ ! -r "$md5_file_path" ]; then
+    echo -e "\n${RED}FAIL!${RESET} File $md5_file_path Exists But Not Readable!\n" >&2
+    exit 1
+fi
+
+# check checksums
+## check sha256
+if sha256sum -c "$sha256_file_path" 1>/dev/null; then
+    echo -e "SHA256 Checksums: ${GREEN}OK!${RESET}"
+    checksha256=true
+else
+    echo -e "\n\nSHA256 Checksums: ${RED}BAD!${RESET}\nDumping SHA256 Checksum Fails:" >&2
+    sha256sum -c "$sha256_file_path" | grep 'FAILED' >&2
+    echo -e "\nSHA256 Checksums: ${RED}BAD!${RESET}\n" >&2
+fi
+## check md5
+if md5sum -c "$md5_file_path" 1>/dev/null; then
+    echo -e "MD5 checksums: ${GREEN}OK!${RESET}"
+    checkmd5=true
+else
+    echo -e "\n\nFAIL: MD5 Checksums: ${RED}BAD!${RESET}\n\tDumping MD5 Checksum Fails:" >&2
+    md5sum -c "md5_file_path" | grep 'FAILED' >&2
+    echo -e "\nMD5 Checksums: ${RED}BAD!${RESET}\n" >&2
+fi
+
+# tally checks
+if [[ $checksha256 == true && $checkmd5 == true ]]; then
+    echo -e "\nFile Integrity: VERIFIED! All Checksums: ${GREEN}OK!${RESET}\n"
+    exit 0 # exit success
+else
+    echo -e "\nFile Integrity Check: ${RED}FAILED!${RESET}\n\tSee Above or See $error_log" >&2
+    exit 1 # exit general failure
+fi