Re: tar --unlink ?
On Fri, 9 Oct 2009 07:58 +0200, guru@ wrote: Hello, To move a file tree from one place to another I see as an example: # tar -cf - local | tar --unlink -xpf - -C /mnt What does '--unlink' do exactly? I can't see it in the man page of tar(1). Thanks in advance matthias man 2 unlink -- ;; dataix.net!jhell 2048R/89D8547E 2009-09-30 ;; BSD since FreeBSD 4.2Linux since Slackware 2.1 ;; 85EF E26B 07BB 3777 76BE B12A 9057 8789 89D8 547E ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: tar --unlink ?
El día Friday, October 09, 2009 a las 02:07:21AM -0400, jhell escribió: On Fri, 9 Oct 2009 07:58 +0200, guru@ wrote: Hello, To move a file tree from one place to another I see as an example: # tar -cf - local | tar --unlink -xpf - -C /mnt What does '--unlink' do exactly? I can't see it in the man page of tar(1). Thanks in advance matthias man 2 unlink I know the unlink(2) sys call, but what does this --unlink flag in tar(1) on restore (-x)? matthias -- Matthias Apitz t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211 e g...@unixarea.de - w http://www.unixarea.de/ Vote NO to EU The Lisbon Treaty: http://www.no-means-no.eu ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: tar --unlink ?
In the last episode (Oct 09), Matthias Apitz said: El día Friday, October 09, 2009 a las 02:07:21AM -0400, jhell escribió: On Fri, 9 Oct 2009 07:58 +0200, guru@ wrote: To move a file tree from one place to another I see as an example: # tar -cf - local | tar --unlink -xpf - -C /mnt What does '--unlink' do exactly? I can't see it in the man page of tar(1). Thanks in advance man 2 unlink I know the unlink(2) sys call, but what does this --unlink flag in tar(1) on restore (-x)? It's the same as the -U option, provided for gnutar compatibility. -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: tar --unlink ?
El día Friday, October 09, 2009 a las 01:52:45AM -0500, Dan Nelson escribió: I know the unlink(2) sys call, but what does this --unlink flag in tar(1) on restore (-x)? It's the same as the -U option, provided for gnutar compatibility. Dan, Thanks for your helping answer. Maybe someone with commit right should make a note in the manpage of tar(1). Thanks matthias -- Matthias Apitz t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211 e g...@unixarea.de - w http://www.unixarea.de/ Vote NO to EU The Lisbon Treaty: http://www.no-means-no.eu ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: tar --unlink ?
In the last episode (Oct 09), Matthias Apitz said: El día Friday, October 09, 2009 a las 01:52:45AM -0500, Dan Nelson escribió: I know the unlink(2) sys call, but what does this --unlink flag in tar(1) on restore (-x)? It's the same as the -U option, provided for gnutar compatibility. Thanks for your helping answer. Maybe someone with commit right should make a note in the manpage of tar(1). Thanks There already is a note, at the very end of the manpage: There are alternative long options for many of the short options that are deliberately not documented. -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
tar --unlink ?
Hello, To move a file tree from one place to another I see as an example: # tar -cf - local | tar --unlink -xpf - -C /mnt What does '--unlink' do exactly? I can't see it in the man page of tar(1). Thanks in advance matthias -- Matthias Apitz t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211 e g...@unixarea.de - w http://www.unixarea.de/ Vote NO to EU's Lisbon Treaty: http://www.no-means-no.eu ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
undocumented tar --unlink switch
Around line 37 of /usr/src/usr.sbin/pkg_install/add/extract.c there's an invocation of /usr/bin/tar with a --unlink switch, which I don't see mentioned in the tar(1) manpage. Anyone happen to know what this does, or do I need to dig into the code? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: undocumented tar --unlink switch
In the last episode (Aug 02), [EMAIL PROTECTED] said: Around line 37 of /usr/src/usr.sbin/pkg_install/add/extract.c there's an invocation of /usr/bin/tar with a --unlink switch, which I don't see mentioned in the tar(1) manpage. Anyone happen to know what this does, or do I need to dig into the code? That's just the longopts version of -U. They're mainly for gnutar compatibility, and the manpage refers to them at the very end: There are alternative long options for many of the short options that are deliberately not documented. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: undocumented tar --unlink switch
Around line 37 of /usr/src/usr.sbin/pkg_install/add/extract.c there's an invocation of /usr/bin/tar with a --unlink switch, which I don't see mentioned in the tar(1) manpage. Anyone happen to know what this does, or do I need to dig into the code? My guess was that it was the long option version of -U: -U (x mode only) Unlink files before creating them. Without this option, tar overwrites existing files, which preserves existing hardlinks. With this option, existing hardlinks will be broken, as will any symlink that would affect the location of an A quick perusal of the source confirms. Josh ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
