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copied!<p><s>I don't think that you can count on it. The <code>wc</code> here runs in a separate process, so there is no synchronization.</s> My trial run suggests that it might be (at least in bash). As <a href="https://stackoverflow.com/questions/3143452/is-the-order-that-tee-prints-to-stdout-guaranteed/3143539#3143539">Daenyth explains</a>, this particular case is special, but try it with <code>grep -o line</code> instead of <code>wc</code> and see what you get. </p> <p>That said, on my MacBoox I get:</p> <pre><code>$ printf "line1\nline2\nline3\nline4\nline5\n" | tee >(grep -o line ) | (awk '{print "this is awk: "$0}') this is awk: line1 this is awk: line2 this is awk: line3 this is awk: line4 this is awk: line5 this is awk: line this is awk: line this is awk: line this is awk: line this is awk: line </code></pre> <p>very consistently. I'd have to read the bash man page very closely to be sure.</p> <p>Similarly:</p> <pre><code>$ printf "line1\nline2\nline3\nline4\nline5\n" | tee >(awk '{print "*" $0 "*"}' ) | (awk '{print "this is awk: "$0}') this is awk: line1 this is awk: line2 this is awk: line3 this is awk: line4 this is awk: line5 this is awk: *line1* this is awk: *line2* this is awk: *line3* this is awk: *line4* this is awk: *line5* </code></pre> <p>everytime...and</p> <pre><code>$ printf "line1\nline2\nline3\nline4\nline5\n" | tee >(awk '{print "*" $0 "*"}' ) | (grep line) line1 line2 line3 line4 line5 *line1* *line2* *line3* *line4* *line5* </code></pre>

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