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#!/bin/csh -f :: What does it mean

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# 1  
Old 05-28-2010
#!/bin/csh -f :: What does it mean
Hi,
I have a script which I need to modify. It contains the following statement at the beginning -

1. What does this mean ?
Code:
#!/bin/csh -f

2. If I run the following code in a script on C SHELL it runs normally.
Code:
host=0
if [ -s /usr/bin/1234.xcf ]; then
 host="<<something>>"
fi

But, in the script with that header #!/bin/csh -f, it gives me the following error
Code:
host=0: Command Not Found
Missing ]

I am using Solaris 8 and
Code:
echo $SHELL

gives me /bin/csh

SmilieSmilie Please provide some insight.
# 2  
Old 05-28-2010
Quote:
Originally Posted by angshuman_ag
1. What does this mean ?
Code:
#!/bin/csh -f

-f Fast start. Reads neither the .cshrc file, nor the .login file
(if a login shell) upon startup.


Quote:
Originally Posted by angshuman_ag
2. If I run the following code in a script on C SHELL it runs normally.
Code:
host=0
if [ -s /usr/bin/1234.xcf ]; then
 host="<<something>>"
fi

I don't think it was the csh, though echo $SHELL says it is.

Quote:
Originally Posted by angshuman_ag
But, in the script with that header #!/bin/csh -f, it gives me the following error
Code:
host=0: Command Not Found
Missing ]

Yeah, this is csh. If you remove the -f switch, it should return the same error message.
In csh, one sets a variable like so:
Code:
% set var=value

Check this (The set command) csh Commands
In your case the host variable should be set like so:
Code:
set host=0



---------- Post updated at 23:41 ---------- Previous update was at 23:17 ----------

Besides I wonder what is the output of echo $0 after you run host=0 in shell and it succeeds.
And what is the output of echo $0 after you run /bin/csh
# 3  
Old 05-28-2010
It gives error in either case
Code:
"No file for $0

"

Also, in the 1st case, that "set" solves the issue, but the "if" syntax has some problem I guess ! Tried other syntaxes, but somehow stuck.
# 4  
Old 05-28-2010
Quote:
Originally Posted by angshuman_ag
It gives error in either case
Code:
"No file for $0"

Veeeeerrrry strange Smilie

Quote:
Originally Posted by angshuman_ag
... but the "if" syntax has some problem I guess ! Tried other syntaxes, but somehow stuck.
Try this:
Code:
set host=0
if ( -s /usr/bin/1234.xcf ) set host="something"

or
Code:
set host=0
if ( -s /usr/bin/1234.xcf ) then
set host="something"
endif

# 5  
Old 05-28-2010
Both the "if" formats I tried. If gives me the foolowing error :

Code:
if: Badly formed number

Thinking.... what is this problem now.
# 6  
Old 05-28-2010
Smilie
Looks like your csh's built-in test operator does not support "-s", try this
Code:
set host=0
if ( /bin/test -s /usr/bin/1234.xcf ) set host="something"

If it doesn't work, try it even with curly brackets, like it's demonstrated here:
if: Badly formed number (1st Response) - Toolbox for IT Groups

---------- Post updated at 01:16 ---------- Previous update was at 01:09 ----------

Also try this:
Code:
set host=0
if ( ! -z /usr/bin/1234.xcf ) set host="something"

This User Gave Thanks to pseudocoder For This Post:
angshuman_ag
# 7  
Old 06-01-2010
Pseudocoder - Thanks for your help. Your posts are very helpful !
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