The command above will execute one chmod command for every file it finds. In theory less efficient because of the overhead of starting a new process for each file.
Quote:
The second command invokes one chmod process to set the permissions on all of the files that are discovered by find. The biggest potential problem with this command is that the number of files found could cause the command argument limit to be exceeded. If you are wanting to minimise the number of chmod processes that are started, this would be the best method:
The xargs command will invoke chmod with the output from find, ensuring that the maximum argument limit isn't exceeded. If it has to, it will invoke chmod more than once, but you won't have a 1:1 ratio of chmod processes to files found.
I was wondering what the difference was between the two commands, I understand that locate won't search for files with certain permissions set. Are there any others?
Thanks (1 Reply)
I have a file which gets appended with records daily..for eg. 1st day of the month i get 9 records ,2nd day 9 records .....till the last day in the month...the no of records may vary...i store the previous days file in a variable oldfile=PATH/previousdaysfile....i store the current days file in a... (6 Replies)
I need to find the difference between two files in UNIX. I tried diff, but couldn't get it right.
There are two files:
file1: apple
mango
strawberry
banana
grape
file2: grape
apple
banana
I need an output file like below: ... (11 Replies)
I have two files as below
File1:
a
b
c
d
File2:
a
b
When i find the difference the output would be c&d..
How can i get my requirement...pls help...
Many thanks in advance (10 Replies)
I have 2 files as follows.
file1.txt
<cell>123</cell>
<cell>345</cell>
file2.txt
<cell>123</cell>
<cell>456</cell>
out out should be
output.txt
<cell>456></cell>
How do we achieve this> The difference betwenn the two files should be wirtten to the output file..
... (2 Replies)
Hi,
The requirement is to compare two files that has single column of records each. Comparison is to happen on a whole and not line by line.
File1.txt
314589929
315611087
304924413
315989094
301171509
302984393
315609549
314593632
File2.txt
315611087
304924413
315989094 (2 Replies)
I have a file wich contains time formats and i need to get the time difference
TIME1 TIME2
==================================
20120624192555.6Z 20120624204006.5Z
which means first date 2012/6/24 19:25:55,second date 2012/6/24 20:40:06 so when i get the time... (1 Reply)
I have a file wich contains time formats and i need to get the time difference
TIME1 TIME2
=============== ===================
20120624192555.6Z 20120624204006.5Z
which means first date 2012/6/24 19:25:55,second date 2012/6/24 20:40:06 so when i get the time... (23 Replies)
Hi All,
Please find my problem below:
I have a file at two different nodes dev and test
1st find> find /u/dev/local/abc -name ab.dat
--Since this file can be in several sub directories
2nd find> find /u/test/local/abc -name ab.dat
I find my 1st find result and do compare with 2nd... (5 Replies)
Hi Friends,
I need to find the difference between two files ,
File_1 contained 4 columns, and File_2 contained 4 columns,
I need to find the difference using 1st column,
Or need to find the difference using 3st column, (6 Replies)
Discussion started by: Shenbaga.d
6 Replies
LEARN ABOUT PHP
chmod
CHMOD(3) 1 CHMOD(3)chmod - Changes file modeSYNOPSIS
bool chmod (string $filename, int $mode)
DESCRIPTION
Attempts to change the mode of the specified file to that given in $mode.
PARAMETERS
o $filename
- Path to the file.
o $mode
- Note that $mode is not automatically assumed to be an octal value, so to ensure the expected operation, you need to prefix $mode
with a zero (0). Strings such as "g+w" will not work properly.
<?php
chmod("/somedir/somefile", 755); // decimal; probably incorrect
chmod("/somedir/somefile", "u+rwx,go+rx"); // string; incorrect
chmod("/somedir/somefile", 0755); // octal; correct value of mode
?>
man 1 chmod' and ' man 2 chmod'.
<?php
// Read and write for owner, nothing for everybody else
chmod("/somedir/somefile", 0600);
// Read and write for owner, read for everybody else
chmod("/somedir/somefile", 0644);
// Everything for owner, read and execute for others
chmod("/somedir/somefile", 0755);
// Everything for owner, read and execute for owner's group
chmod("/somedir/somefile", 0750);
?>
RETURN VALUES
Returns TRUE on success or FALSE on failure.
NOTES
Note
The current user is the user under which PHP runs. It is probably not the same user you use for normal shell or FTP access. The
mode can be changed only by user who owns the file on most systems.
Note
This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.
Note
When safe mode is enabled, PHP checks whether the files or directories you are about to operate on have the same UID (owner) as the
script that is being executed. In addition, you cannot set the SUID, SGID and sticky bits.
SEE ALSO chown(3), chgrp(3), fileperms(3), stat(3).
PHP Documentation Group CHMOD(3)