[英]getopts with all optional arguments
In order to run a bash script I need some arguments and flags, since the requirements are pretty tricky I've chosen to use a getopt function like this 为了运行bash脚本,我需要一些参数和标志,因为要求非常棘手,所以我选择使用这样的getopt函数
while getopts ":s:g:r" o; do
case "${o}" in
s)
# Variables that require value
VALUE1=${OPTARG}
;;
g)
# Variables that require value
MGROUP=${OPTARG}
;;
r)
# Variables that, if present, set just a flag
ASROOT=1
;;
*)
echo "Usage: ./myscript.sh -s value1 -g value2 -r"
;;
esac
done
I would like to have all parameters optional so I can write some conditions later in my code, and first two (s and g) with an arguments, the third (r) is only a optional flag. 我希望所有参数都是可选的,以便稍后可以在代码中编写一些条件,并且前两个(s和g)带有参数,第三个(r)只是可选标记。 In the future I may need to add additional parametrers, always optional. 将来我可能需要添加其他参数,这些参数始终是可选的。 Any advice? 有什么建议吗?
Sample script illustrating optional arguments with bash getopts in a style similar to mysql client. 示例脚本以类似于mysql客户端的样式说明了bash getopts的可选参数。 "--" is also supported. 也支持“-”。
Usage: script.sh [-u ] [-p | 用法:script.sh [-u] [-p | -p] [--] arg1 arg2 ... -p] [-] arg1 arg2 ...
#!/bin/bash
#
# Sample script illustrating optional arguments with bash getopts in
# a style similar to mysql client. "--" is also supported.
#
# tgage@nobigfoot.com - 5-Oct-2019 - Distribute/use without restriction.
#
# Defaults
username="$(whoami)"
unset password
while getopts ":u:p:" arg; do
case $arg in
u) # Username
username="$OPTARG"
;;
p) # Password
thisarg=$((OPTIND - 1)); thisarg="${!thisarg}"; thisarg="${thisarg:2}"
if [[ ! -z $OPTARG ]] && [[ "$OPTARG" != "$thisarg" ]]; then
unset password
OPTIND=$((OPTIND - 1))
else
password="$thisarg"
fi
if [[ -z $password ]]; then
read -s -p "Password: " password
echo
fi
;;
\?)
# Request Help
echo "Sorry that I can be of no help."
;;
*)
# Deal with option at end of line
OPTION=$((OPTIND - 1)); OPTION="${!OPTION}"
case $OPTION in
--)
# Add support for --
break
;;
-p)
# Option with optional argument
unset password
read -s -p "Password: " password
echo
;;
*)
# Invalid argument
echo "Error; Invalid option \"$OPT\"." >&2
;;
esac
;;
esac
done
shift $((OPTIND -1))
echo "Username: $username"
echo "Password: $password"
echo
echo "Remaining arguments:$*"
echo
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