Johannes Schindelin wrote: > On Sun, 18 Jan 2009, Jeff King wrote: > > On Sun, Jan 18, 2009 at 10:41:13AM +0100, Stephan Beyer wrote: > > > Hmm, IIRC if $FIRSTLINE contains \n or something like that, it will > > > interpret this as newline in some shell/echo implementations. > > > > > > So printf "...%s..." "$FOO" is always sane for user input. > > But you are wrong. And Stephan is wrong, too. > > The name "FIRSTLINE" suggests that it is indeed a first line, and > consequently cannot contain a newline. I think the point was that $FIRSTLINE can contain a backslash sequence such as (literally) \n or \r. Indeed 'man 1p echo' on my system says _string_ A string to be written to standard output. If the first operand is -n, or if any of the operands contain a backslash ( '\' ) character, the results are implementation- defined. (Those POSIX manpages are really useful!) -- Thomas Rast trast@{inf,student}.ethz.ch
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