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From: | John Reiser |
Subject: | bug#6900: mktemp: want option to make a fifo |
Date: | Tue, 24 Aug 2010 13:30:47 -0700 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc11 Thunderbird/3.0.4 |
> (echo quit 1 | cmd1 3<&0 <&4) 4<&0 | > (: | cmd2 3<&0 <&4) 4<&0 When adopting this style, then remember to consider the possibility of closing the "extra" file descritpor (fd 4 here) to reduce the number of open files. If there are no 'trap', then also remember to consider the possibility of using 'exec' to reduce the number of processes created ['fork' or 'clone' system calls] and their lifetimes: (exec echo quit 1 | exec cmd1 3<&0 <&4 4<&-) 4<&0 | ( : | exec cmd2 3<&0 <&4 4<&-) 4<&0 --
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