Re^3: Get filename of STDOUT

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Re^4: Get filename of STDOUT by Ven'Tatsu (Deacon) on Aug 10, 2004 at 19:20 UTC
ActivePerl build 810 (5.8.4) gives me the following: `> perl -e "print $0" -e > echo print $0 >test.pl > perl test.pl test.pl` [download] 5.6.1 on Linux gave me the same values for aproxamitly the same tests. (adjusting for shell differences) Setting $0 has no noticeable effect on windows that I could see.	[reply] [d/l]
Re^5: Get filename of STDOUT by gaal (Parson) on Aug 11, 2004 at 07:41 UTC
Wow, I was really sure I did see this broken on Windows, but you're right, it does work. What really doesn't happen is this name being propagated to the process list (either ctrl-shift-esc or ps if using Cygwin). Apparently the Windows kernel doesn't honor changing $0 with the same method perl does it on unix. Now that I see I was wrong, I looked this up in perlvar: `On some (read: not all) operating systems assigning to $0 modifies the argument area that the "ps" program sees. On some platforms you may have to use special "ps" options or a different "ps" to see the changes. Modifying the $0 is more useful as a way of indicating the current program state than it is for hiding the program you're running.` [download] I stand corrected!	[reply] [d/l]
Re^4: Get filename of STDOUT by ikegami (Patriarch) on Aug 10, 2004 at 20:21 UTC
`perl -e "print $0"` prints `-e`. Oops, silly me! `perl test.pl` prints `test.pl` where test.pl is `print $0;`. `>perl -v This is perl, v5.6.1 built for MSWin32-x86-multi-thread (with 1 registered patch, see perl -V for more detail) Copyright 1987-2001, Larry Wall Binary build 633 provided by ActiveState Corp. http://www.ActiveState. +com Built 21:33:05 Jun 17 2002` [download]	[reply] [d/l] [select]