Question

#I used to have this, but I don t want to write to the disk
#
pcap="somefile.pcap"
tcpdump -n -r $pcap > all.txt
while read line; do  
  ARRAY[$c]="$line"
  c=$((c+1))  
done < all.txt

以下因素未能奏效。

# I would prefer something like...
#
pcap="somefile.pcap"
while read line; do  
  ARRAY[$c]="$line"
  c=$((c+1))  
done < $( tcpdump -n -r "$pcap" )

谷歌成果太少(没有了解我想要找到的东西): 我愿保留“Bourne-compatible”(/bin/sh),但现在只有 持<>。

Answer 1

(sh-compatible:

tcpdump -n -r "$pcap" | while read line; do  
  # something
done

但是,<代码>sh没有阵列,因此您的代码与sh一样。其他发言者说,<条码>bash和perl目前相当普遍,而且你可以主要依靠非重要系统提供。

<>UPDATE,以反映@Dennis s comment

Answer 2

这部建筑在篮子里:

while read line; do  
  ARRAY[$c]="$line"
  c=$((c+1))  
done < <(tcpdump -n -r "$pcap")

Answer 3

如果你不关心 being,你可以转往伯尔:

my $pcap="somefile.pcap";
my $counter = 0;
open(TCPDUMP,"tcpdump -n -r $pcap|") || die "Can not open pipe: $!
";
while (<TCPDUMP>) {
    # At this point, $_ points to next line of output
    chomp; # Eat newline at the end
    $array[$counter++] = $_;
}

或按批号使用,

for line in $(tcpdump -n -r $pcap)  
do  
 command  
done

Answer 4

for line in $(tcpdump -n -r $pcap)  
do  
 command  
done

This isn t exactly doing what I need. But it is close. And Shell compatible. I m creating HTML tables from the tcpdump output. The for loop makes a new <tr> row for each word. It should make a new row for each line ( ending). Paste bin script01.sh.

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