#! /usr/bin/ksh
for newdir in newdir1 newdir2 newdir3 newdir4 ; do
olddir=${newdir#new}
mkdir $newdir
for dir in dir1 dir2 dir3 dir3 ; do
if [[ $dir != $olddir ]] ; then
cd $dir
ls | while read file ; do
newfile=${file%.txt}
[[ -f ../${newdir}/$newfile || -f ../${olddir}/$file ]] || cp $file ../${newdir}/${newfile}
done
cd ..
fi
done
done
exit 0
This way you copy the file to $newdir only if it is not already there. Also the presense of the file in the old directory will inhibit the copy. From what you said, this will save copying thousands of files. Now no rm step is needed. The files renamed as they were copied, no separate rename step needed either.
Hi,
I am trying to implement the synchronize feature of java using C. I am using a semaphore for the same. I have a wrapper called "synch" to which I pass the function pointer(any_fn). This pointer points to the function (my_fn) which needs to be synchronized.
However to create the semaphore I... (8 Replies)
I am writing a program in C for my networking class, so I am relatively new to this.
To begin, I have 7 processes that need do send messages to every other one, and every one of them needs to receive the messages sent by others.
I am using fork() to create 6 more processes.
The message... (1 Reply)
hi.
i am writing a c program under bash shell.
i would like to use semaphore functions like sem_wait(), sem_post()
and i included <semaphore.h> and it compailes fine
but when i try to run it gives me an error "undefined reference to sem_wait() , sem_post() , sem_init()"
what have i missed... (2 Replies)
i am trying to synchronize between father process and son process
created by fork() command, to print simultaneously.
my program is written in c under bash shell.
the compile goes ok but when i try to run nothing happens and the program doesnot end.
my code is:
#include <stdio.h>... (1 Reply)
Hi,
I have two servers1&2, one is not in the network. Cant communicate from it to other servers. The second one can communicate to above mentioned server. I am trying a script which synchronizes files between server 1 an 2?
server1: cant communicate to any other servers
server2: can... (4 Replies)
Hi everyone!
I need to write a script that will synchronize two servers using FTP. So basically the script will get only the files that exist on the remote server that do not exist on the local server. Is there an option to do this when using mget? If not, is there a way to copy over only the... (2 Replies)
I am trying to get a listing of ALL directories only under /export (as an example). I can get all the dirs directly under /export but I need any sub dirs under those dirs. I've looked (here and google) but can not find anything that works (4 Replies)
Hello, I have the latest stable release of a UNIX-like O.S. in the ISO format, and want to synchronize it with the latest Release Candidate (RC) of it, in order to reducing bandwidth usage. The ISO images for that O.S. is provided via different protocols including rsync, FTP and HTTP
Is this... (4 Replies)
Discussion started by: temp-usr
4 Replies
LEARN ABOUT CENTOS
chacl
CHACL(1) Access Control Lists CHACL(1)NAME
chacl - change the access control list of a file or directory
SYNOPSIS
chacl acl pathname...
chacl -b acl dacl pathname...
chacl -d dacl pathname...
chacl -R pathname...
chacl -D pathname...
chacl -B pathname...
chacl -l pathname...
chacl -r pathname...
DESCRIPTION
chacl is an IRIX-compatibility command, and is maintained for those users who are familiar with its use from either XFS or IRIX. Refer to
the SEE ALSO section below for a description of tools which conform more closely to the (withdrawn draft) POSIX 1003.1e standard which
describes Access Control Lists (ACLs).
chacl changes the ACL(s) for a file or directory. The ACL(s) specified are applied to each file in the pathname arguments.
Each ACL is a string which is interpreted using the acl_from_text(3) routine. These strings are made up of comma separated clauses each of
which is of the form, tag:name:perm. Where tag can be:
"user" (or "u")
indicating that the entry is a user ACL entry.
"group" (or "g")
indicating that the entry is a group ACL entry.
"other" (or "o")
indicating that the entry is an other ACL entry.
"mask" (or "m")
indicating that the entry is a mask ACL entry.
name is a string which is the user or group name for the ACL entry. A null name in a user or group ACL entry indicates the file's owner or
file's group. perm is the string "rwx" where each of the entries may be replaced by a "-" indicating no access of that type, e.g. "r-x",
"--x", "---".
OPTIONS -b Indicates that there are two ACLs to change, the first is the file access ACL and the second the directory default ACL.
-d Used to set only the default ACL of a directory.
-R Removes the file access ACL only.
-D Removes directory default ACL only.
-B Remove all ACLs.
-l Lists the access ACL and possibly the default ACL associated with the specified files or directories. This option was added during
the Linux port of XFS, and is not IRIX compatible.
-r Set the access ACL recursively for each subtree rooted at pathname(s). This option was also added during the Linux port of XFS, and
is not compatible with IRIX.
EXAMPLES
A minimum ACL:
chacl u::rwx,g::r-x,o::r-- file
The file ACL is set so that the file's owner has "rwx", the file's group has read and execute, and others have read only access to the
file.
An ACL that is not a minimum ACL, that is, one that specifies a user or group other than the file's owner or owner's group, must contain a
mask entry:
chacl u::rwx,g::r-x,o::r--,u:bob:r--,m::r-x file1 file2
To set the default and access ACLs on newdir to be the same as on olddir, you could type:
chacl -b `chacl -l olddir |
sed -e 's/.*[//' -e 's#/# #' -e 's/]$//'` newdir
CAUTIONS
chacl can replace the existing ACL. To add or delete entries, you must first do chacl -l to get the existing ACL, and use the output to
form the arguments to chacl.
Changing the permission bits of a file will change the file access ACL settings (see chmod(1)). However, file creation mode masks (see
umask(1)) will not affect the access ACL settings of files created using directory default ACLs.
ACLs are filesystem extended attributes and hence are not typically archived or restored using the conventional archiving utilities. See
attr(5) for more information about extended attributes and see xfsdump(8) for a method of backing them up under XFS.
SEE ALSO getfacl(1), setfacl(1), chmod(1), umask(1), acl_from_text(3), acl(5), xfsdump(8)September 2001 ACL File Utilities CHACL(1)