122 lines
3.0 KiB
Bash
Executable File
122 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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# section 2.1
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default_read(){
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read input1 input2 input3
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echo "[$input1] [$input2] [$input3]"
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}
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# section 2.2
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custom_ifs_no_array(){
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OLDIFS=$IFS
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IFS=";"
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read input1 input2 input3
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echo "[$input1] [$input2] [$input3]"
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# restore default IFS after we're finished so current shell behaves like before
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IFS=$OLDIFS
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}
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# Section 2.3
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prompt_read_password(){
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prompt="You shall not pass:"
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read -p "$prompt" -s input
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echo -e "\ninput password [$input]"
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}
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array_read(){
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declare -a input_array
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text="baeldung is a cool tech site"
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read -e -i "$text" -a input_array
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for input in ${input_array[@]}
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do
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echo " word [$input]"
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done
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}
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# section 3.1
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file_read(){
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exec {file_descriptor}<"./file.csv"
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declare -a input_array
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delimiter=";"
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while IFS="," read -a input_array -d $delimiter -u $file_descriptor
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do
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echo "${input_array[0]},${input_array[2]}"
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done
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exec {file_descriptor}>&-
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}
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# section 3.2
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command_pipe(){
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ls -ll / | { declare -a input
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read
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while read -a input;
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do
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echo "${input[0]} ${input[8]}"
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done }
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}
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# section 3.3
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timeout_input_read(){
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prompt="You shall not pass:"
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read -p "$prompt" -s -r -t 5 input
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if [ -z "$input" ]; then
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echo -e "\ntimeout occured!"
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else
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echo -e "\ninput word [$input]"
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fi
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}
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exactly_n_read(){
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prompt="Reading exactly 11 chars:"
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read -p "$prompt" -N 11 -t 5 input1 input2
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echo -e "\ninput word1 [$input1]"
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echo "input word2 [$input2]"
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}
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# main menu entry point
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echo "****Read command samples menu*****"
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PS3="Your choice (1,2,3 etc.):"
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options=("default_read" "custom_ifs_no_array" "prompt_read_password" \
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"array_read" "file_read" "command_pipe" "timeout_input_read" \
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"exactly_n_read" "quit")
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select option in "${options[@]}"
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do
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case $option in
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"default_read")
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echo "Enter something separated by spaces"
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default_read
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;;
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"custom_ifs_no_array")
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echo "Enter something separated by ;"
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custom_ifs_no_array
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;;
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"prompt_read_password")
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echo "Enter an invisible password after the prompt"
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prompt_read_password
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;;
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"array_read")
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echo "Enter something else or just return"
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array_read
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;;
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"file_read")
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echo "Reading from one liner csv file"
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file_read
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;;
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"command_pipe")
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echo "Listing files and access rights from /"
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command_pipe
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;;
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"timeout_input_read")
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echo "Enter something in 5 seconds or less"
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timeout_input_read
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;;
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"exactly_n_read")
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echo "Enter at least 11 characters or wait 5 seconds"
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exactly_n_read
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;;
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"quit")
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break
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;;
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*) echo "Invalid option";;
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esac
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done |