On Tue, Apr 21, 2009 at 06:31:47AM -0700, Steve Langasek wrote: > On Tue, Apr 21, 2009 at 03:20:49PM +0200, maximilian attems wrote: > > On Tue, 21 Apr 2009, Steve Langasek wrote: > > > > Is 'command -v' in SUSv3? 'which' is the predominant idiom used in > > > maintainer scripts... > > > it is supported by dash as builtin. > > Which isn't what I asked. We shouldn't be using non-policy-compliant > features in maintainer scripts just because they happen to be available, > particularly when there are equally valid alternatives in Essential. command is required by POSIX. The -v option is only required of implementations supporting the User Portability Utilities (UP) option. It is unclear whether Debian supports that option. I believe it does not, because vi is required if an implementation supports both the UP option and the getconf variable POSIX2_CHAR_TERM (which is set to 200112 on Debian), but (AFAIK) none of Debian's vi implementations support a real open mode, which is required of POSIX vi implementations. Also, SUSv3 is different from POSIX; TTBOMK, SUSv3 includes all the XSI extensions, while POSIX leaves them as options. -- brian m. carlson / brian with sandals: Houston, Texas, US +1 713 440 7475 | http://crustytoothpaste.ath.cx/~bmc | My opinion only troff on top of XML: http://crustytoothpaste.ath.cx/~bmc/code/thwack OpenPGP: RSA v4 4096b 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
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