Here is my script.
I want my script can do the following problem is display a listing of the user's directory and allow permission change. Prompt the user to change file permission (y/n). If yes, prompt the user for the file name. Display the file's permission. Ask the user to enter the add or remove the following permission: read the user, write user, execute user, read group, write group, execute group, read other, write other and execute other. After file permission have been changed, display the file's new permission.
I am really stuck all day and been trying to solve it all day long.
Anyone who read my post. Thank you so much and really appreciate for ehlping me.
Last edited by Scott; 05-17-2010 at 01:23 AM..
Reason: Code tags, please...
I am logged in as root and am trying to execute a file called x_cleanup_equdata but keep getting the message
ksh: x_cleanup_equdataNEW: 0403-006 Execute permission denied.
I did FTP this file from another server using GET, would this make the difference?
I tried chmod 666 but still no luck. ... (2 Replies)
I have a crontab job that runs a database backup and directs the output to a log. I ran the job, and the output log file was created with no problems, but now if I try and run the same job again, I keep getting a file exists error. The permissions are:
-rw-rw-r--
I also tried changing the... (2 Replies)
how can a script run without execute permissions.
when i run myscript as :
sh a.sh
it was working but when i say simple a.sh its not working since it has no x permission.but how about fist case? (1 Reply)
Hi,I am a newbie, in a hp-ux box,i create a file testfile as root,
ls -l testfile
-rw-r--r-- 1 root sys 1 Jan 11 17:51 testfile
then l login the box as user ivan,then I execute
rm testfile
It prompts me testfile : 644 mode ? (y/n) ,if I enter y,then the testfile is... (11 Replies)
This might be very silly question but i dont know y is it so...
i Have script
I have Given the permissions in the following manner...
-rwxrwx--x 1 root system 3 Jun 08 15:46 temp
I want no one to see what is present in that but should be able to execute it..
but when... (3 Replies)
Hello
I have situation where with my user id (group x) I am able to view a file. However if su to another user (different group) I am not able to view. I get permission denied. The file has complete wide open permissions -rwxrwxrwx and I can also cd from root to the directory in which the file... (3 Replies)
Hello,
I need to install a program from a DVD. It uses a sh script called setup.
root@ragnok: head -2 /media/cdrom0/setup
#!/bin/sh
root@ragnok: ls -l /media/cdrom0/setup
-r-xr-xr-x 1 root root 4688 Nov 8 08:38 /media/cdrom0/setup
root@ragnok: /media/cdrom0/setup
bash:... (2 Replies)
Discussion started by: snorkack59
2 Replies
LEARN ABOUT CENTOS
flock
FLOCK(1) User Commands FLOCK(1)NAME
flock - manage locks from shell scripts
SYNOPSIS
flock [options] <file|directory> <command> [command args]
flock [options] <file|directory> -c <command>
flock [options] <file descriptor number>
DESCRIPTION
This utility manages flock(2) locks from within shell scripts or the command line.
The first and second forms wrap the lock around the executing a command, in a manner similar to su(1) or newgrp(1). It locks a specified
file or directory, which is created (assuming appropriate permissions), if it does not already exist. By default, if the lock cannot be
immediately acquired, flock waits until the lock is available.
The third form uses open file by file descriptor number. See examples how that can be used.
OPTIONS -s, --shared
Obtain a shared lock, sometimes called a read lock.
-x, -e, --exclusive
Obtain an exclusive lock, sometimes called a write lock. This is the default.
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be
required in special cases, for example if the enclosed command group may have forked a background process which should not be hold-
ing the lock.
-n, --nb, --nonblock
Fail rather than wait if the lock cannot be immediately acquired. See the -E option for the exit code used.
-w, --wait, --timeout seconds
Fail if the lock cannot be acquired within seconds. Decimal fractional values are allowed. See the -E option for the exit code
used.
-o, --close
Close the file descriptor on which the lock is held before executing command . This is useful if command spawns a child process
which should not be holding the lock.
-E, --conflict-exit-code number
The exit code used when the -n option is in use, and the conflicting lock exists, or the -w option is in use, and the timeout is
reached. The default value is 1.
-c, --command command
Pass a single command, without arguments, to the shell with -c.
-h, --help
Print a help message.
-V, --version
Show version number and exit.
EXAMPLES
shell1> flock /tmp -c cat
shell2> flock -w .007 /tmp -c echo; /bin/echo $?
Set exclusive lock to directory /tmp and the second command will fail.
shell1> flock -s /tmp -c cat
shell2> flock -s -w .007 /tmp -c echo; /bin/echo $?
Set shared lock to directory /tmp and the second command will not fail. Notice that attempting to get exclusive lock with second
command would fail.
shell> flock -x local-lock-file echo 'a b c'
Grab the exclusive lock "local-lock-file" before running echo with 'a b c'.
(
flock -n 9 || exit 1
# ... commands executed under lock ...
) 9>/var/lock/mylockfile
The form is convenient inside shell scripts. The mode used to open the file doesn't matter to flock; using > or >> allows the lock-
file to be created if it does not already exist, however, write permission is required. Using < requires that the file already
exists but only read permission is required.
[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -en "$0" "$0" "$@" || :
This is useful boilerplate code for shell scripts. Put it at the top of the shell script you want to lock and it'll automatically
lock itself on the first run. If the env var $FLOCKER is not set to the shell script that is being run, then execute flock and grab
an exclusive non-blocking lock (using the script itself as the lock file) before re-execing itself with the right arguments. It
also sets the FLOCKER env var to the right value so it doesn't run again.
EXIT STATUS
The command uses sysexits.h return values for everything else but an options -n or -w failures which return either the value given by the
-E option, or 1 by default.
AUTHOR
H. Peter Anvin <hpa@zytor.com>
COPYRIGHT
Copyright (C) 2003-2006 H. Peter Anvin.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO flock(2)AVAILABILITY
The flock command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
linux/>.
util-linux September 2011 FLOCK(1)