/bin/bash##file name: getopts.sh##Sample script that takes two parameters, a, b, c, and v using getopts.#Parameters a and c are simple on/off switches#The b parameter takes a value.#The v parameter will be used to keep track of a verbosity level;# more '-v's results in a hig...
In some cases, the script should not run when no argument is passed. In that case, you can use conditional statements to check the length of arguments passed ($@) is zero or not. If no arguments are passed, the script will fail. Take a look at the below code. I am storing the pa...
Arguments for bash script interfaceChristian Margreitter
$1, $2...$nThe bash script arguments. $$The process id of the current shell. $#The total number of arguments passed to the script. $@The value of all the arguments passed to the script. $?The exit status of the last executed command. ...
# Use bash for the shell SHELL ["/bin/bash", "-o", "pipefail", "-c"] # Create a script file sourced by both interactive and non-interactive bash shells ENV BASH_ENV /home/user/.bash_env RUN touch "${BASH_ENV}" RUN echo '. "${BASH_ENV}"' >> ~/.bashrc # Download and ...
A sample run looks like: $ ./a.sh -host foo -user me -pass secret some args host = foo user = me pass = secret args = some args 转自: http://stackoverflow.com/questions/4882349/parsing-shell-script-arguments
Script name is: ./arg_intro.sh Arg1 is runtime Arg1 is inputs Arg1 is --- All args: runtime inputs All args count: 2 Parsing Complex Arguments usinggetopt In the previous section, you understood how the positional arguments are passed into the script. This method doesn't hold well if...
The usage output of the script is: Usage: count [OPTIONS] N A simple counter. POSITIONAL ARGUMENTS N Number to count OPTIONS -r, --reverse Count reverse -t, --text TEXT Print TEXT when finished counting (default: done) -h, --help Show this help message and exit EXAMPLES count 8 Coun...
You will not see the arguments passed to the commands which is usually helpful when trying to debug a bash script. You may find useful to use both. ### Define Debug environment ### Filename: my-debug-env if [[ -v TRACE ]]; then echo "Run TRACE mode" set -o xtrace # same as...
Checking the uses of the number of arguments in Bash script for various purposes such as error handling, providing messages based on the number of arguments.