Date: Fri, 30 May 2008 21:15:29 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Stefan Farfeleder <stefan@fafoe.narf.at> Cc: freebsd-standards@freebsd.org Subject: Re: $LINENO within functions Message-ID: <20080530181529.GD21317@deviant.kiev.zoral.com.ua> In-Reply-To: <20080530181242.GC21317@deviant.kiev.zoral.com.ua> References: <20080530172711.GA1056@lizard.fafoe.narf.at> <20080530181242.GC21317@deviant.kiev.zoral.com.ua>
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[-- Attachment #1 --] On Fri, May 30, 2008 at 09:12:42PM +0300, Kostik Belousov wrote: > On Fri, May 30, 2008 at 07:27:12PM +0200, Stefan Farfeleder wrote: > > Hi, > > > > SUSv3 says the following about $LINENO: > > > > "Set by the shell to a decimal number representing the current > > sequential line number (numbered starting with 1) within a script or > > function before it executes each command. If the user unsets or resets > > LINENO , the variable may lose its special meaning for the life of the > > shell. If the shell is not currently executing a script or function, the > > value of LINENO is unspecified. This volume of IEEE Std 1003.1-2001 > > specifies the effects of the variable only for systems supporting the > > User Portability Utilities option." > > > > My initial interpretation of "or function" was that it means $LINENO > > within a function should be relative to the function's beginning line. > > Now I'm not so sure anymore. Bash release 2.05b changed the expansion > > of $LINENO within functions to absolute numbering, stating this is > > required by POSIX. But then I wonder about the meaning of "or > > function". Does it mean functions in interactive scripts? Because for > > functions in shell scripts the mentioning of both "script" and > > "function" seems redundant. > > I do not know whether you need this data, but ksh93 and pdksh exhibit > the same behaviour as bash. For the rev. 1.1 of lineno.0, I got > > 2 > 3 > 6 > 7 > 12 > 13 > foo > foo > 2 > > On the other hand, zsh produces > > 2 > 3 > 1 > 2 > 12 > 13 > foo > foo > 2 Oh, and /usr/xpg4/bin/sh on the fully patches Solaris 10 output is identical with the zsh one. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkhAREAACgkQC3+MBN1Mb4gFHQCcDFBQCWRK2E+kUbaLtStA1Lzr RzYAnArb2W1EibQJmwrgDweI+VSb5OrM =x9Xp -----END PGP SIGNATURE-----home | help
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