Re^2: passing pipes on the command line

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Re^3: passing pipes on the command line by itub (Priest) on Mar 23, 2005 at 17:35 UTC
Oops, you are right. I'm a victim of the cut-and-paste syndrome. :)	[reply]
Re^3: passing pipes on the command line by iradik (Novice) on Mar 23, 2005 at 19:36 UTC
hmm.. nice... so that just passes a FIFO as the filename...	[reply]
Re^4: passing pipes on the command line by Mugatu (Monk) on Mar 23, 2005 at 20:39 UTC
Exactly. It's a very nice trick when you have a program that expects to read from a file, and has no facilities for reading from STDIN. A common example is `diff`: `diff <(grep foo file1 \| sort -u) \ <(grep foo file2 \| sort -u)` [download] Of course, we have rapidly veered off topic for the Monastery, so I digress. :-)	[reply] [d/l] [select]
Re^5: passing pipes on the command line by ambrus (Abbot) on Mar 23, 2005 at 21:03 UTC
Sure, it's very useful. Of course, diff can read one of its inputs from stdin, so you can use `grep foo file1 \| sort -u \| diff - <( grep foo file2 \| sort -u )` [download]	[reply] [d/l]