-------- Forwarded Message -------- > From: Wim Lewis <[EMAIL PROTECTED]> > To: Wojciech Kazubski <[EMAIL PROTECTED]>, Peter Clifton <[EMAIL PROTECTED]> > Subject: Fwd: gEDA-dev: gEDA 1.4.2 fixes - sch2eaglepos.sh > Date: Sat, 22 Nov 2008 19:48:47 -0800 > > Hmm, my response to this didn't seem to make it to the list. > Apologies if you receive this twice. > > -------- Begin forwarded message -------- > From: Wim Lewis <[EMAIL PROTECTED]> > Date: November 21, 2008 3:29:41 PM PST > To: gEDA developer mailing list <geda-dev@moria.seul.org> > Subject: Re: gEDA-dev: gEDA 1.4.2 fixes - sch2eaglepos.sh > > > On Nov 21, 2008, at 2:43 PM, Wojciech Kazubski wrote: > > The patch should be applied before next release but I don't know if > > mktemp is > > avalilable in all OS-es (BSD, Windows?). > > In my experience it's pretty reliably available, but the invocation > varies from system to system. A quick survey: > > OpenBSD (4.2): available, works without args > Usage: mktemp [-dqtu] [-p prefix] [template] > > NetBSD (4.0): available, needs args > Usage: mktemp [-dqu] {-t prefix | template ...} > > MacOS X (10.4 and 10.5): available, needs args > usage: mktemp [-d] [-q] [-t prefix] [-u] template ... > mktemp [-d] [-q] [-u] -t prefix > > On netbsd and osx, "mktemp -t gnetlist" will do the right thing, but > on openbsd that will do the wrong thing (note that the -t flag has a > different meaning there) and on one Linux box I checked just now it > will simply fail (no -t flag). I don't have access to a cygwin install. > > To summarize, AFAIK *either* `mktemp` or `mktemp -t gnetlist` should > work on the vast majority of systems, but I don't know offhand of an > easy way to check which. Maybe there's an autoconf macro that will > figure it out at configure time? > > > ...[snip]... > > TMP=`mktemp` > > grep -B1 refdes= "$FNAME" |sed 's/=/ /' | cut -d" " -f2,3 |grep -v > > '^--' > $TMP > > ...[snip]... > > FWIW, the $TMP variable is often used to store the path to the > directory to make temp files *in* (like $TMPDIR). It might be better > to use a different name for the variable in this shell script, to > avoid a clash. > > ... Actually, looking at the shell script, I don't think there's any > need to have a temporary file at all. Just pipe the output of grep > directly into the 'while' loop and remove the "-u 3": > > grep blah blah sed cut grep etc | while read X Y; do > stuff... > > Simpler and more secure, I think, and avoids having to figure out how > to use mktemp(1). > > > Wim. > > -- Peter Clifton
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