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Full Discussion: S# in a for loop - concatenate $(loop counter)
Top Forums Shell Programming and Scripting S# in a for loop - concatenate $(loop counter) Post 302536580 by agama on Tuesday 5th of July 2011 11:36:53 PM
Old 07-06-2011
Quote:
Originally Posted by Aia
Code:
else
	shift
	
	for arg in $@
	do	
		if [ -f "$arg" ]
		then
			echo "$arg exists"
		fi
	done	
fi

I'd make one small change to Aia's suggestion:

Code:
for arg in "$@"

Quoting $@ preserves any whitespace that might have been a part of the parameter on the command line. Unfortunately people do create filenames which have spaces, and if the command line were something like this

Code:
script-name nosuchfile "my big file"

using $@ without the quotes would cause the loop to execute and test "my" "big" and "file" as three separate names, rather than the single name entered on the command line.

Filenames with spaces are a personal pet peeve, and your environment might not have any for you to worry about, but from a more generic command line processing perspective, knowing the difference between $@ and "$@" might make a difference as you write scripts in future.
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LEARN ABOUT DEBIAN

ns_sockasyncconnect2

Ns_Sock(3aolserver)					   AOLserver Library Procedures 				       Ns_Sock(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME

       Ns_BindSock,  Ns_GetSockAddr,  Ns_SockAccept,  Ns_SockAsyncConnect,  Ns_SockAsyncConnect2,  Ns_SockBind, Ns_SockCloseLater, Ns_SockConnect,
       Ns_SockConnect2, Ns_SockListen, Ns_SockListenEx, Ns_SockPipe, Ns_SockSetBlocking, Ns_SockSetNonBlocking, Ns_SockStrError,  Ns_SockTimedCon-
       nect, Ns_SockTimedConnect2, ns_pipe, ns_sockpair - library procedures

SYNOPSIS

       #include "ns.h"

       Ns_BindSock(arg, arg)

       Ns_GetSockAddr(arg, arg)

       Ns_SockAccept(arg, arg)

       Ns_SockAsyncConnect(arg, arg)

       Ns_SockAsyncConnect2(arg, arg)

       Ns_SockBind(arg, arg)

       Ns_SockCloseLater(arg, arg)

       Ns_SockConnect(arg, arg)

       Ns_SockConnect2(arg, arg)

       Ns_SockListen(arg, arg)

       Ns_SockListenEx(arg, arg)

       Ns_SockPipe(arg, arg)

       Ns_SockSetBlocking(arg, arg)

       Ns_SockSetNonBlocking(arg, arg)

       Ns_SockStrError(arg, arg)

       Ns_SockTimedConnect(arg, arg)

       Ns_SockTimedConnect2(arg, arg)

       ns_pipe(arg, arg)

       ns_sockpair(arg, arg)
_________________________________________________________________

DESCRIPTION

       These functions ...

SEE ALSO

       nsd(1), info(n)

KEYWORDS

AOLserver								4.0						       Ns_Sock(3aolserver)
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