Need help to find the files under a directory Post: 302252221

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Top Forums UNIX for Dummies Questions & Answers Need help to find the files under a directory Post 302252221 by vino on Wednesday 29th of October 2008 04:08:28 AM

10-29-2008

Registered User

Quote:

Originally Posted by Sheethal

Can you please tell me is there any difference between the command,

Code:

rm "$FILENAME"

and 

rm -- $FILENAME

I know that if we have special characters in the file name then we have to specify the filename in double quotes or have to use -- before the file name. But what is the difference between these two commands. I dont find any difference while executing the command . Please help me on this.

A -- denotes the end of flags that the command can take accept. What follows after that would be arguments to be operated upon. See the following sets of commands and notice that -- is needed to mark the beginning of file names.

Code:

[/tmp]$ mkdir "-f"
mkdir: invalid option -- f
Try `mkdir --help' for more information.
[/tmp]$ mkdir -f
mkdir: invalid option -- f
Try `mkdir --help' for more information.
[/tmp]$ mkdir -- -f
[/tmp]$ ls -l 
drwxr-xr-x  2 xxx xxx 4096 Oct 29 01:00 -f

[/tmp]$ rm -f
[/tmp]$ rm "-f"
[/tmp]$ rm '-f'
[/tmp]$ rm -fd -f
[/tmp]$ ls -l 
drwxr-xr-x  2 xxx xxx 4096 Oct 29 01:00 -f

[/tmp]$ rm -rd -- -f
rm: remove directory `-f'? y
[/tmp]$ ls -l -- -f
ls: -f: No such file or directory

vino

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LEARN ABOUT FREEBSD

sticky

STICKY(7)					       BSD Miscellaneous Information Manual						 STICKY(7)

NAME

     sticky -- sticky text and append-only directories

DESCRIPTION

     A special file mode, called the sticky bit (mode S_ISTXT), is used to indicate special treatment for directories.	It is ignored for regular
     files.  See chmod(2) or the file <sys/stat.h> for an explanation of file modes.

STICKY DIRECTORIES

     A directory whose `sticky bit' is set becomes an append-only directory, or, more accurately, a directory in which the deletion of files is
     restricted.  A file in a sticky directory may only be removed or renamed by a user if the user has write permission for the directory and the
     user is the owner of the file, the owner of the directory, or the super-user.  This feature is usefully applied to directories such as /tmp
     which must be publicly writable but should deny users the license to arbitrarily delete or rename each others' files.

     Any user may create a sticky directory.  See chmod(1) for details about modifying file modes.

HISTORY

     A sticky command appeared in Version 32V AT&T UNIX.

BUGS

     Neither open(2) nor mkdir(2) will create a file with the sticky bit set.

BSD
								   June 5, 1993 							       BSD

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