[英]getopts to use for both flags and option parsing
I am using getopts in my script and I want to work it for all the following order of option parsing. 我在脚本中使用了getopts,并且希望将其用于以下所有选项解析顺序。
./myscript -c server
./myscript -c -h server
./myscript server -c
./myscript -h server -c
./myscript server
I am using myscript as follows. 我正在使用myscript如下。
#!/bin/bash
while getopts c:h: var
do
case $var in
h) host=$OPTARG;;
c) FLAG=1
esac
done
Here "server" is a argument and should load even -h option specifies or not and also -c option I am using for a FLAG.Is there a way to get this achieved. 这里的“服务器”是一个参数,甚至应该加载-h选项是否指定以及我正在为FLAG使用的-c选项。有没有办法实现这一目标。
Sometimes it's better not to use getopts
at all: 有时最好不要使用
getopts
:
#!/bin/bash
while [[ $# -gt 0 ]]; do
case "$1" in
-c)
FLAG=1
;;
-h)
HOST=$2
shift
;;
-*)
echo "Unknown option: $1"
exit 1
;;
*)
HOST=$1
;;
esac
shift
done
By the way your script would give you a syntax error since you missed the two semicolons: 顺便说一句,由于您错过了两个分号,因此脚本会给您带来语法错误:
c) FLAG=1 ;;
I fixed my issue by applying some extra validations.. 我通过应用一些额外的验证解决了我的问题。
#!/bin/bash
USAGE() {
echo "Invalid Option"
exit 1
}
if [ $# -eq 2 ]; then
case $1 in
-c) FLAG=1; host=$2 ;;
-h) host=$2 ;;
esac
if [ -z "$host" ]; then
case $2 in
-c) FLAG=1; host=$1;;
-h) host=$1;;
*) USAGE;;
esac
fi
else
while getopts q:c:h: OPTION
do
case ${OPTION} in
q) USAGE;;
h) host=$OPTARG;;
c) FLAG=1 ;;
*)USAGE;;
esac
done
fi
if [ $# -eq 1 ]; then host=$1 ;fi
echo Host = $host FLag = $FLAG
In all the cases I am getting my host in my script as shown in this output. 在所有情况下,如输出所示,我都在脚本中获取主机。
$ ./myscript.sh server1
Host = server1 FLag =
$ ./myscript.sh -c server1
Host = server1 FLag = 1
$ ./myscript.sh server1 -c
Host = server1 FLag = 1
$ ./myscript.sh server1 -h
Host = server1 FLag =
$ ./myscript.sh -h server1
Host = server1 FLag =
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