gandalf@csli.STANFORD.EDU (Juergen Wagner) (04/29/88)
set nonomatch if ( ! -e $dir/* ) echo $dir is empty. -- Juergen "Gandalf" Wagner, gandalf@csli.stanford.edu Center for the Study of Language and Information (CSLI), Stanford CA
rbj@icst-cmr.arpa (Root Boy Jim) (05/04/88)
From: Juergen Wagner <gandalf@csli.stanford.edu> Date: 28 Apr 88 22:29:13 GMT set nonomatch if ( ! -e $dir/* ) echo $dir is empty. Didn't work under 4.3 BSD. How about a two-step solution? ls -A $dir > /tmp/$$ if ( -z /tmp/$$ ) echo directory empty Csh needs a few other operators, such as a test for symbolic links. Juergen "Gandalf" Wagner, gandalf@csli.stanford.edu Center for the Study of Language and Information (CSLI), Stanford CA (Root Boy) Jim Cottrell <rbj@icst-cmr.arpa> National Bureau of Standards Flamer's Hotline: (301) 975-5688 The opinions expressed are solely my own and do not reflect NBS policy or agreement I represent a sardine!!
mdorion@cmtl01.UUCP (Mario Dorion) (05/08/88)
In article <13241@brl-adm.ARPA>, rbj@icst-cmr.arpa (Root Boy Jim) writes: > set nonomatch > if ( ! -e $dir/* ) echo $dir is empty. > > Didn't work under 4.3 BSD. How about a two-step solution? > > ls -A $dir > /tmp/$$ > if ( -z /tmp/$$ ) echo directory empty Wouldn't if [ `ls -a $dir | wc -w` -eq 2 ] \* for . and .. *\ then echo $dir is empty fi work ????? BTW: what does "set nonomatch" do ??? -- Mario Dorion | ...!{rutgers,uunet,ihnp4}! Frisco Bay Industries | philabs!micomvax!cmtl01!mdorion Montreal, Canada | 1 (514) 738-7300 | I thought this planet was in public domain!
morrell@hpsal2.HP.COM (Michael Morrell) (05/12/88)
/ hpsal2:comp.unix.questions / mdorion@cmtl01.UUCP (Mario Dorion) / 7:15 pm May 7, 1988 /
BTW: what does "set nonomatch" do ???
--
Mario Dorion | ...!{rutgers,uunet,ihnp4}!
Frisco Bay Industries | philabs!micomvax!cmtl01!mdorion
Montreal, Canada |
1 (514) 738-7300 | I thought this planet was in public domain!
----------
In csh, setting "nonomatch" causes the shell to leave unchanged a construct
like "*" which does not match anything, rather than giving an error message.
For example, if my current directory only has the file "foo" and I type:
ls b*
I will normally get an error ("No match"). If nonomatch is set, however,
the shell will say: "b* not found".
Michael Morrellrbj@icst-cmr.arpa (Root Boy Jim) (05/18/88)
From: Mario Dorion <mdorion@cmtl01.uucp> In article <13241@brl-adm.ARPA>, rbj@icst-cmr.arpa (Root Boy Jim) writes: > set nonomatch > if ( ! -e $dir/* ) echo $dir is empty. > > Didn't work under 4.3 BSD. How about a two-step solution? > > ls -A $dir > /tmp/$$ > if ( -z /tmp/$$ ) echo directory empty Wouldn't if [ `ls -a $dir | wc -w` -eq 2 ] \* for . and .. *\ then echo $dir is empty fi work ????? I suppose. BTW: what does "set nonomatch" do ??? I assume you must be running TPC UNIX, or you would have read the csh manual. Anyway, "mkdir x; cd x; set nonomatch; echo qaz*" echo's 'qaz*'. The variable `nonomatch' allows the echo to succeed instead of producing an error. Personally, I dislike both the name and the implementation. I would have called the variable `nullmatch' and returned the empty string. Now for some head scratching, what does `unset nonomatch' mean? :-) Mario Dorion | ...!{rutgers,uunet,ihnp4}! Frisco Bay Industries | philabs!micomvax!cmtl01!mdorion Montreal, Canada | 1 (514) 738-7300 | I thought this planet was in public domain! (Root Boy) Jim Cottrell <rbj@icst-cmr.arpa> National Bureau of Standards Flamer's Hotline: (301) 975-5688 The opinions expressed are solely my own and do not reflect NBS policy or agreement My name is in /usr/dict/words. Is yours?