bash - 解析 iw wlan0 扫描输出

Question

我编写了 wlan 管理器脚本来处理 open/ad-hoc/wep/wpa2 网络。现在我正在尝试解析 iw wlan0 扫描输出，以便为我的脚本获得良好的扫描功能。我的目标是获得这样的输出:

SSID        channel     signal      encryption
wlan-ap     6           70%         wpa2-psk
test        1           55%         wep

我已经实现的是这样的输出:

$ iw wlan0 scan | grep 'SSID\|freq\|signal\|capability' | tac
SSID: Koti783
signal: -82.00 dBm
capability: ESS Privacy ShortPreamble SpectrumMgmt ShortSlotTime (0x0531)
freq: 2437

我一直在尝试研究 bash/sed/awk，但还没有找到一种方法来实现我正在尝试的目标。那么实现这一目标的好方法是什么？

Answer 1

这是我基于 Sudo_O answer 的最终解决方案:

$1 == "BSS" {
    MAC = $2
    wifi[MAC]["enc"] = "Open"
}
$1 == "SSID:" {
    wifi[MAC]["SSID"] = $2
}
$1 == "freq:" {
    wifi[MAC]["freq"] = $NF
}
$1 == "signal:" {
    wifi[MAC]["sig"] = $2 " " $3
}
$1 == "WPA:" {
    wifi[MAC]["enc"] = "WPA"
}
$1 == "WEP:" {
    wifi[MAC]["enc"] = "WEP"
}
END {
    printf "%s\t\t%s\t%s\t\t%s\n","SSID","Frequency","Signal","Encryption"

    for (w in wifi) {
        printf "%s\t\t%s\t\t%s\t%s\n",wifi[w]["SSID"],wifi[w]["freq"],wifi[w]["sig"],wifi[w]["enc"]
    }
}'

输出:

$ sudo iw wlan0 scan | awk -f scan.awk
SSID        Frequency   Signal      Encryption
netti       2437        -31.00 dBm  Open
Koti783     2437        -84.00 dBm  WPA
WLAN-AP     2462        -85.00 dBm  WPA