#!/bin/csh
# This script will accept a file name as one argument and the word
# read, write or execute as the second argument
# On top of that, it will switch the permissions to the opposite one
if ( $2 == read ) then
if ( -r $1 ) then
chmod +r $1
echo Permission changed to readable
else
chmod -r $1
echo Permission changed to not readable
endif
else
if ( $2 == write ) then
if ( -w $1 ) then
chmod +w $1
echo Permission changed to writeable
else
chmod -w $1
echo Permission changed to not writeable
endif
else
if ( -x $1 ) then
chmod +x $1
echo Permission changed to executable
else
chmod -x $1
echo Permission changed to non executable
endif
endif
endif
Hello, I am getting Expression syntax message and I cannot figure out what's wrong. This program will print all the odd numbers between 0 and the one the user enters, in cshell. I think my logic is either good or almost there, but i dont see the errors. I think it could be the spaces between... (1 Reply)
Hi
what's the correct way of writing if
1)if "$time_diff" -gt 5
then
echo "killing hung process \n"
fi
2)if test $time_diff -gt 5
then
echo "killing hung process \n"
fi
where -time_diff=$(($Sam - $current_min))
and current_min=`date +%M`
infact both are giving Syntax... (1 Reply)
Hello,
This is my first post so, Hello World! Anyways, I'm learning how to use unix and its quickly become apparent that a strong foundation in regular expressions will make things easier. I'm not sure if my syntax is messing things up or my logic is messing things up.
ps -e | grep... (4 Replies)
#! /bin/csh
set umr=UMR
foreach i ( `ls`)
set file_nm=$i
set bh_nm=`echo $file_nm | cut -d"_" -f2`
if($bh_nm !=$umr) then
{
set bh_ext=`echo $file_nm | cut -d"_" -f4`
set bh_num_nm="$bh_nm $bh_ext a .txt"
mv $file_nm $bh_num_nm
}
... (1 Reply)
Hello,
I am relatively new to UNIX scripting and am learning a lot. I have already tried several searches on this website and have tried various syntax options suggested to no avail. I am obviously not writing the script correctly. I really do appreciate any and all the help.
Below is an... (8 Replies)
I'm pretty new to shell scripting, but I am catching on quick. I did see one of the stickied threads about the csh, and I think this is relevant, but I don't understand enough to make a decision based on it. So as you'll see below, I use the |csh pipe, and if that is not correct, I'm certainly... (2 Replies)
Hello there!
I am having some difficulties in the syntax of a script.
I am a newbie :)
What i want is a script that copies 1 or more files to a destination folder with
a question if file allready exists
if ($#argv > 2) then
if (-d $argv($#argv)) then
foreach x ($*)
cp -i $x to... (4 Replies)
I've found this script which seems very promising to solve my issue:
To search and replace many different database passwords in many different (.php, .pl, .cgi, etc.) files across my filesystem.
The passwords may or may not be contained within quotes, single quotes, etc.
#!/bin/bash... (4 Replies)
I'm using tcl scripts in ns2 ( network simulator) through cygwin. It works fine , however, I downloaded an example when i run it , I got the following syntax error:
syntax error in expression with " *2" : unexpected operator *
while executing :
"expr $bw *2"
invoked from within:
"$ns... (1 Reply)
#!/bin/bash
a1="04:29:39 - System health check failed"
i=$1
echo "a $((a$i))"
The script above gives the following error
$113> sh tryt.sh 1
tryt.sh: line 6: 04:29:39 - System health check failed: syntax error in expression (error token is ":29:39 - System health check failed")
It... (1 Reply)
Discussion started by: ashima jain
1 Replies
LEARN ABOUT PLAN9
chmod
CHMOD(1) General Commands Manual CHMOD(1)NAME
chmod - change mode
SYNOPSIS
chmod mode file ...
DESCRIPTION
The mode of each named file is changed according to mode, which may be an octal number or a symbolic change to the existing mode. A mode
is an octal number constructed from the OR of the following modes.
0400 read by owner
0200 write by owner
0100 execute (search in directory) by owner
0070 read, write, execute (search) by group
0007 read, write, execute (search) by others
A symbolic mode has the form:
[who] op permission
The who part is a combination of the letters u (for user's permissions), g (group) and o (other). The letter a stands for ugo. If who is
omitted, the default is a.
Op can be + to add permission to the file's mode, - to take away permission, and = to assign permission absolutely (all other bits will be
reset).
Permission is any combination of the letters r (read), w (write), x (execute), a (append only), and l (exclusive access).
Only the owner of a file or the group leader of its group may change the file's mode.
SOURCE
/sys/src/cmd/chmod.c
SEE ALSO ls(1), stat(2), stat(5)CHMOD(1)
03-18-2009
