测试[]上的BASH错误
我希望能够在bash脚本中验证某种东西是以IP的形式存在的，并且我在网上找到了各种代码片段。。。它们都有大致相同的结构测试[]上的BASH错误,bash,shell,Bash,Shell,我希望能够在bash脚本中验证某种东西是以IP的形式存在的，并且我在网上找到了各种代码片段。。。它们都有大致相同的结构 #!/bin/bash valid_ip() { local ip=$1 echo $ip if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then ret=0 # is an IP else ret=1 # isn't
#!/bin/bash
valid_ip()
{
local ip=$1
echo $ip
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
ret=0 # is an IP
else
ret=1 # isn't an IP
fi
return $ret
}
# SCRIPT -------------------------------------
#clear the table
ipfw table 1 flush
ips=$(dig -f ./hostnames.txt +short)
# For each of the IPs check that it is a valid IP address
# then check that it does not exist in the ips file already
# if both checks pass append the IP to the file
for ip in $ips
do
if valid_ip $ip; then
if grep -R "$ip" "~/Dropbox/ProxyBox Stuff/dummynet/ips.txt"; then
echo "$ip already exists"
else
echo $ip >> ips.txt
fi
fi
done
# get the IP's and add them to table 1
cat ips.txt | while read line; do
ipfw table 1 add $line
done
./script.sh: 18: ./script.sh: [[: not found
sudo ./script.sh
我相信使用sudo会导致这个问题，但我需要sudo pf来处理我脚本的其他部分。尽管自第一个版本以来，BASH的所有版本中都有
[…][…]]--enable cond命令$ /bin/bash -c help
if echo "$ip" | egrep -q "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$"
-qegrpif顺便说一句，在正则表达式中，
500.600.700.900[…][…]--enable cond命令$ /bin/bash -c help
if echo "$ip" | egrep -q "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$"
-qegrpif顺便说一句，在正则表达式中，
500.600.700.900#/bin/bash#/bin/bash#！/bin/bashbash/bin/sh/bin/sh/etc/bashrc[[set-oshoptbash#！/bin/bashbash/bin/sh/bin/sh/etc/bashrc[[set-oshoptbash