Re: filter a binary file and reduce 0x150a to 0x15
On Tue 2010-10-19 21:21:00 UTC-0400, Karl Vogel (vogelke+u...@pobox.com) wrote: me% perl -0pe 's/\025\n/\025/g;' blah | od -c Nitpicking a little, but Perl isn't part of the FreeBSD base any more. Most FreeBSD users probably have it installed, though (perhaps as a dependency)... ___ 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: filter a binary file and reduce 0x150a to 0x15
El día Tuesday, October 19, 2010 a las 09:24:34AM -0400, Jerry McAllister escribió: On Tue, Oct 19, 2010 at 03:08:45PM +0200, Matthias Apitz wrote: Hello, Before I programm it in C (or whatever), is there any normal shell tool to filter a (large) binary file and change any occurance of 0x150a to 0x15 (i.e. delete \n but only if it follows a char 0x15)? Can you manage it with tr(1) ? Not as I read its man page; maybe you could give a concrete example? 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/ ___ 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: filter a binary file and reduce 0x150a to 0x15
El día Wednesday, October 20, 2010 a las 12:36:44AM +1100, andrew clarke escribió: I'd be personally more comfortable doing it in C or Python but I think you can do this with tr -s. me too; Note: 0x15 == 25 octal; 0x0a == 12 octal. I don't recall if it's possible to use hex values in csh arguments - if so, what is the syntax? 0:28 ozzmo...@blizzard [~/tmp]printf 'Hello\25\12world.\12' blah 0:28 ozzmo...@blizzard [~/tmp]hd blah 48 65 6c 6c 6f 15 0a 77 6f 72 6c 64 2e 0a|Hello..world..| 000e 0:28 ozzmo...@blizzard [~/tmp]tr -s '\25\12' '\25' blah | hd 48 65 6c 6c 6f 15 77 6f 72 6c 64 2e 15 |Hello.world..| 000d I saw this, but this has the side affect to reduce any occourance of a duouble 0x1515 to 0x15: g...@current:~ printf '\25\25Hello\25\12world.\12' blah g...@current:~ hd blah 15 15 48 65 6c 6c 6f 15 0a 77 6f 72 6c 64 2e 0a |..Hello..world..| 0010 g...@current:~ tr -s '\25\12' '\25' blah | hd 15 48 65 6c 6c 6f 15 77 6f 72 6c 64 2e 15 |.Hello.world..| Thanks anyway 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/ ___ 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: filter a binary file and reduce 0x150a to 0x15
On Tue, Oct 19, 2010 at 03:08:45PM +0200, Matthias Apitz wrote: Hello, Before I programm it in C (or whatever), is there any normal shell tool to filter a (large) binary file and change any occurance of 0x150a to 0x15 (i.e. delete \n but only if it follows a char 0x15)? Can you manage it with tr(1) ? jerry 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/ ___ 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 ___ 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: filter a binary file and reduce 0x150a to 0x15
On Tue 2010-10-19 15:08:45 UTC+0200, Matthias Apitz (g...@unixarea.de) wrote: Before I programm it in C (or whatever), is there any normal shell tool to filter a (large) binary file and change any occurance of 0x150a to 0x15 (i.e. delete \n but only if it follows a char 0x15)? I'd be personally more comfortable doing it in C or Python but I think you can do this with tr -s. Note: 0x15 == 25 octal; 0x0a == 12 octal. I don't recall if it's possible to use hex values in csh arguments - if so, what is the syntax? 0:28 ozzmo...@blizzard [~/tmp]printf 'Hello\25\12world.\12' blah 0:28 ozzmo...@blizzard [~/tmp]hd blah 48 65 6c 6c 6f 15 0a 77 6f 72 6c 64 2e 0a|Hello..world..| 000e 0:28 ozzmo...@blizzard [~/tmp]tr -s '\25\12' '\25' blah | hd 48 65 6c 6c 6f 15 77 6f 72 6c 64 2e 15 |Hello.world..| 000d Regards Andrew ___ 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: filter a binary file and reduce 0x150a to 0x15
On Tue, 19 Oct 2010 15:08:45 +0200, Matthias Apitz g...@unixarea.de said: M Before I programm it in C (or whatever), is there any normal shell tool M to filter a (large) binary file and change any occurance of 0x150a to M 0x15 (i.e. delete \n but only if it follows a char 0x15)? This seems to work, depending on your definition of normal: me% od -c blah 000 025 025 H e l l o 025 \n w o r l d . \n 020 me% perl -0pe 's/\025\n/\025/g;' blah | od -c 000 025 025 H e l l o 025 w o r l d . \n 017 The -0 says read null-terminated lines, so if your binary file is big enough and has few enough nulls, you could chew up a diaper-load of memory. -- Karl Vogel I don't speak for the USAF or my company A raccoon tangled with a 23,000 volt line today. The results blacked out 1400 homes and, of course, one raccoon. --Steel City News ___ 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
