test

Signed-off-by: Yanxuan Liu <[email protected]>

Author: YanxuanLiu

shell-test.sh

@@ -0,0 +1,119 @@
+#!/bin/bash
+# shellcheck disable=SC2317  # Temporarily disable checks to demonstrate errors
+
+# =====================
+# Basic Syntax Errors (detectable by both bash -n and shellcheck)
+# =====================
+
+# 1. Unmatched quotes
+echo "Hello World   # Error: Missing closing quote
+
+# 2. Unclosed control structure
+if [ -f "test_file.txt" ]; then
+  echo "File exists"
+# Error: Missing 'fi'
+
+# 3. Incomplete pipe command
+cat "some_file.txt" |   # Error: Nothing after pipe
+
+# 4. Unclosed function
+function test_function {
+  echo "Inside function"
+# Error: Missing '}'
+
+# =====================
+# Semantic Errors (primarily detected by shellcheck)
+# =====================
+
+# 5. Unquoted variable with spaces
+filename="file with spaces.txt"
+rm $filename  # Error: Should be rm "$filename"
+
+# 6. Misuse of exit status
+grep "pattern" "some_file.txt"
+if [ $? = 0 ]; then  # Error: Should use if grep -q "pattern" file.txt
+  echo "Pattern found"
+fi
+
+# 7. Uninitialized variable
+echo "Value: $undefined_var"  # Error: Variable never defined
+
+# 8. Arithmetic expression error
+count=5+3  # Error: Should be count=$((5+3))
+
+# 9. Test expression error
+var="value"
+if [ "$var" = value ]; then  # Error: value should be quoted
+  echo "Equal"
+fi
+
+# =====================
+# Security/Best Practice Issues (shellcheck only)
+# =====================
+
+# 10. Command injection risk
+user_input="; echo 'malicious command'"
+ls $user_input  # Error: Should use ls -- "$user_input"
+
+# 11. Inefficient loop
+for file in $(ls *.txt); do  # Error: Should use for file in *.txt
+  echo "$file"
+done
+
+# 12. Constant conditional
+if [[ 1 -eq 1 ]]; then  # Error: Always true
+  echo "Always true"
+fi
+
+# 13. Unclosed file descriptor
+exec 3< "input.txt"
+# Error: Missing exec 3>&-
+
+# =====================
+# Portability Issues (shellcheck only)
+# =====================
+
+# 14. Bashism in sh script
+(
+  #!/bin/sh
+  echo {1..10}  # Error: {} expansion invalid in POSIX sh
+)
+
+# 15. Incompatible test syntax
+(
+  #!/bin/sh
+  if [[ $var == "test" ]]; then  # Error: [[ ]] is bash-specific
+    echo "Match"
+  fi
+)
+
+# =====================
+# Compound Error Section
+# =====================
+
+# 16. Multiple compound errors
+echo "Starting complex error section"
+
+# Unmatched quotes
+echo "Unclosed quote
+
+# Uninitialized variable + unquoted
+if [ $debug_mode = "true" ]; then
+  echo "Debug mode"
+fi
+
+# Broken pipe
+cat /var/log/syslog | 
+
+# Security risk
+find . -name $user_input
+
+# Unclosed loop
+for item in {1..5}; do
+  echo "Processing $item"
+
+# =====================
+# Cleanup (no actual errors)
+# =====================
+echo "All errors are intentional test cases"
+exit 0