Re: truncating files
On Sun, Dec 07, 1997 at 03:05:00PM -0500, Carl Mummert wrote:
cmrm -f {list of filenames}
cmtouch {list of filenames}
This doesn't work if you don't have write permission to the
directory. The solution should be able to truncate any file
I have write access to, even if I can't write to the directory.
Are you sure you should be doing this, then?
Hamish
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Re: truncating files
From the bash manpage: noclobber If set, bash does not overwrite an existing file with the , , and redirection operators. This variable may be overridden when creating output files by using the redirection operator | instead of (see also the -C option to the set builtin command). Bob On Sun, 7 Dec 1997,William R Ward [EMAIL PROTECTED] wrote: 1) I use set -C in bash, so I can't say foo if foo exists wthout first saying set +C. | foo overrides the noclobber option Don't you mean !, not |?? -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
A very simple way is foo (noquotes) works in bash. It also creates a file. Krzysztof On Sat, 6 Dec 1997, Carl Mummert wrote: Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Carl [EMAIL PROTECTED] One must imagine Sysiphus happy -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] . -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
-BEGIN PGP SIGNED MESSAGE- Carl Mummert [EMAIL PROTECTED] writes: Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Other users have suggested the use of foo, a null command, but that does not work in tcsh, my preferred shell. Note that echo z does not, as you might expect it to, add a blank line (at least under tcsh). So you can save 5 characters from your example that way. However the way I do this is by doing cp /dev/null foo... I don't remember why but this is supposedly a better way of doing it. I think it preserves the file permissions more accurately? I am not sure. I picked that up years ago but have since forgotten the reason... HTH. - --Bill. - -- William R Ward Bay View Consulting http://www.bayview.com/~hermit/ [EMAIL PROTECTED] 1803 Mission St. #339voicemail +1 408/479-4072 [EMAIL PROTECTED] Santa Cruz CA 95060 USA pager +1 408/458-8862 -BEGIN PGP SIGNATURE- Version: 2.6.2 Comment: Processed by Mailcrypt 3.4, an Emacs/PGP interface iQCVAwUBNIo/lR25V7Ur0zHlAQHVUQP/cX0J9D6OFRmON4k4CM8Ah8lmePipA7O6 6nlSc3ibyfbQHAsf3mxhVNOPx/QhBxFafEwFE905OLx5PJQpePIkF12BviQcjP86 /Z4l0VGHIM1fj0Vka6huMx9ShhVLZZHeNMcQq4SM2kDYHX3oWD0LScr3zZadFTMe MN0hsbhtLXo= =S+BB -END PGP SIGNATURE- -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
-BEGIN PGP SIGNED MESSAGE- Carl Mummert [EMAIL PROTECTED] writes: Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Other users have suggested the use of foo, a null command, but that does not work in tcsh, my preferred shell. Note that echo z does not, as you might expect it to, add a blank line (at least under tcsh). So you can save 5 characters from your example that way. However the way I do this is by doing cp /dev/null foo... I don't remember why but this is supposedly a better way of doing it. I think it preserves the file permissions more accurately? I am not sure. I picked that up years ago but have since forgotten the reason... HTH. - --Bill. - -- William R Ward Bay View Consulting http://www.bayview.com/~hermit/ [EMAIL PROTECTED] 1803 Mission St. #339voicemail +1 408/479-4072 [EMAIL PROTECTED] Santa Cruz CA 95060 USA pager +1 408/458-8862 -BEGIN PGP SIGNATURE- Version: 2.6.2 Comment: Processed by Mailcrypt 3.4, an Emacs/PGP interface iQCVAwUBNIo/lR25V7Ur0zHlAQHVUQP/cX0J9D6OFRmON4k4CM8Ah8lmePipA7O6 6nlSc3ibyfbQHAsf3mxhVNOPx/QhBxFafEwFE905OLx5PJQpePIkF12BviQcjP86 /Z4l0VGHIM1fj0Vka6huMx9ShhVLZZHeNMcQq4SM2kDYHX3oWD0LScr3zZadFTMe MN0hsbhtLXo= =S+BB -END PGP SIGNATURE- -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] . -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
Summary: 1) foo 2) cp /dev/null foo Problems: 1) I use set -C in bash, so I can't say foo if foo exists wthout first saying set +C. 2) cp /dev/null foo won't take multiple filenames as arguments So teh answer is that I do need a script or program to do the job. Carl [EMAIL PROTECTED] One must imagine Sysiphus happy -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
On Sun, 7 Dec 1997, Carl Mummert wrote:
Summary:
1) foo
2) cp /dev/null foo
Problems:
2) cp /dev/null foo won't take multiple filenames as arguments
So the answer is that I do need a script or program to do the job.
What about:
rm -f {list of filenames}
touch {list of filenames}
...RickM...
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Re: truncating files
cm
cm 1) foo
cm 2) cp /dev/null foo
cm
cm Problems:
cm
cm 2) cp /dev/null foo won't take multiple filenames as arguments
cm
cm So the answer is that I do need a script or program to do the job.
cm
cmWhat about:
cm
cmrm -f {list of filenames}
cmtouch {list of filenames}
This doesn't work if you don't have write permission to the
directory. The solution should be able to truncate any file
I have write access to, even if I can't write to the directory.
Otherwise rm -f / touch would be ok.
Carl
[EMAIL PROTECTED]
One must imagine Sysiphus happy
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Re: truncating files
1) I use set -C in bash, so I can't say foo if foo exists wthout first saying set +C. | foo overrides the noclobber option Bob -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
The problem with removing and recreating is that if a program has that
file open for appending (e.g. logfiles), the file isn't actually
removed from the disk until that program closes its file descriptor.
So you end up with 3 problems:
1. The file still exists on disk, but is not linked to in any
directory;
2. New log messages are sent to the phantom file, not to your newly
created file - so you never see them; and
3. You lose the file ownership and permissions of the original
file.
--Bill.
In article [EMAIL PROTECTED], Rick Macdonald [EMAIL PROTECTED] writes:
On Sun, 7 Dec 1997, Carl Mummert wrote:
Summary:
1) foo
2) cp /dev/null foo
Problems:
2) cp /dev/null foo won't take multiple filenames as arguments
So the answer is that I do need a script or program to do the job.
What about:
rm -f {list of filenames}
touch {list of filenames}
...RickM...
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Re: truncating files
In article [EMAIL PROTECTED], [EMAIL PROTECTED] (Robert D. Hilliard) writes: 1) I use set -C in bash, so I can't say foo if foo exists wthout first saying set +C. | foo overrides the noclobber option Don't you mean !, not |?? --Bill. -- William R Ward Bay View Consulting http://www.bayview.com/~hermit/ [EMAIL PROTECTED] 1803 Mission St. #339voicemail +1 408/479-4072 [EMAIL PROTECTED] Santa Cruz CA 95060 USA pager +1 408/458-8862 -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
truncating files
Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Carl [EMAIL PROTECTED] One must imagine Sysiphus happy -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: truncating files
In article [EMAIL PROTECTED], Carl Mummert [EMAIL PROTECTED] wrote: Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Yeah, just use filename eg, the null command. If you find this unreadable you can also use : filename Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Multiple filenames? for i in *; do : $i; done Mike. -- Miquel van Smoorenburg | Studying to be a technomage * [EMAIL PROTECTED] | May you live in interesting times -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
RE: truncating files
Try this one: foo or, for multiple file names: for xxx in * do $xxx done where * is any regular expression or: for xxx in a b c d e f g.c h.o g.txt ... do $xxx done If your finger are lazier than that, I'm afraid I can't help ;-) On 06-Dec-97 Carl Mummert wrote: Is there already a (standard) utility on a linux box to truncate a file to 0 bytes? [Besides echo -n foo, which is 1) too long for my lazy fingers and 2) won't take multiple filenames ] Since I couldn't find one, I wrote a little C program to do it, but I am still interested in whether there is already one on the system. Carl [EMAIL PROTECTED] One must imagine Sysiphus happy -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] . - Ralph Winslow [EMAIL PROTECTED] The IQ of the group is that of the member whose IQ is lowest divided by the number of members. -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: Big Bad Bug - adduser truncating files from /etc/skel.
I reported this a few weeks ago. Adduser v3.3 should fix this, and should be forthcoming from Guy Maor. Pete -- Peter J. Templin, Jr. Client Services Analyst Computer Communication Services tel: (717) 524-1590 Bucknell University [EMAIL PROTECTED] On Sat, 21 Jun 1997, Dave Cinege wrote: I finally had the need to add some users to my brand new 1.3.0 server. Using adduser everything copied from /etc/skel to /home/[user] gets hacked down to one line. Don't seem like a 'feature' to me -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Big Bad Bug - adduser truncating files from /etc/skel.
I finally had the need to add some users to my brand new 1.3.0 server. Using adduser everything copied from /etc/skel to /home/[user] gets hacked down to one line. I checked my other machine that was 1.2.6 based and the same thing happened. .bash_profile: -- # ~/.bash_profile: executed by bash(1) for login shells. umask 022 -- becomes: -- # ~/.bash_profile: executed by bash(1) for login shells. -- (yes, not good) .alias: -- alias a alias alias loada 'source ~/.alias' alias loadalias loada alias log watchlog unalias ls alias ls 'ls-F -C' alias lsa 'ls -A' alias vdir'ls -l' alias vdira 'dir -A' alias d 'dir' alias da 'dira' alias v 'ls -l' alias va 'v -A' alias pls \\ls alias md mkdir alias rd rmdir alias rmold 'rm -rf *~ .*~ #*#' alias - less alias + 'less -E' # alias + more alias f finger alias ff 'finger -l' alias p 'ping -c 1' -- becomes : -- alias a alias -- Don't seem like a 'feature' to me -- Elite MicroComputers 908-541-4214 http://www.psychosis.com/emc/ -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: Big Bad Bug - adduser truncating files from /etc/skel.
On Sat, 21 Jun 1997, Dave Cinege wrote: I finally had the need to add some users to my brand new 1.3.0 server. Using adduser everything copied from /etc/skel to /home/[user] gets hacked down to one line. I checked my other machine that was 1.2.6 based and the same thing happened. I believe that this was fixed in a more recent version of adduser. What version are you using? Dwarf -- _-_-_-_-_-_- _-_-_-_-_-_-_- aka Dale Scheetz Phone: 1 (904) 656-9769 Flexible Software 11000 McCrackin Road e-mail: [EMAIL PROTECTED] Tallahassee, FL 32308 _-_-_-_-_-_- If you don't see what you want, just ask _-_-_-_-_-_-_- -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: Big Bad Bug - adduser truncating files from /etc/skel.
On Jun 21, Dave Cinege wrote I finally had the need to add some users to my brand new 1.3.0 server. Using adduser everything copied from /etc/skel to /home/[user] gets hacked down to one line. I checked my other machine that was 1.2.6 based and the same thing happened. Hi, upgrade to 3.4 from unstable, will be in 1.3.1: adduser (3.4) stable unstable; urgency=HIGH * fixed behavior when grouphomes=yes (#10422). * don't do shell expansion on system() calls (#10425). * copy to skel copies entire file (#10399) -- Guy Maor [EMAIL PROTECTED] Tue, 10 Jun 1997 10:45:30 -0500 Greetings, Christian -- Christian Meder, email: [EMAIL PROTECTED] What's the railroad to me ? I never go to see Where it ends. It fills a few hollows, And makes banks for the swallows, It sets the sand a-blowing, And the blackberries a-growing. (Henry David Thoreau) -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word unsubscribe to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
