03-07-2011
I don't know why it's not printing, it certainly at least runs ls for me. But then it runs into an infinite loop because of the extra 'shift' in your case statement. It eats the "-f", and outside of the case statement, the next shift eats your "--" argument, so you never reach the 'break'.
The -d option does need the shift because it does take an extra argument, and is safe because getopt will put nothing but "--" in your parameter list if you don't give it a parameter.
You should have while [ "$#" -gt 0 ] to prevent an infinite loop in case something eats your "--" argument. You can still break the loop whenever you please.
I don't understand your cd ~/whatever | ls -a cd prints no output to stdout, and ls reads no input from stdin -- there's nothing to pipe! As a side-effect ls gets created before cd happens and just lists the current directory.
Did you mean ls -a ~/whatever? This also avoids changing the directory at all.
Is your program meant to quit after -f? If so, you can just put an exit statement after the ls.
Last edited by Corona688; 03-07-2011 at 05:01 PM..
This User Gave Thanks to Corona688 For This Post:
9 More Discussions You Might Find Interesting
1. Linux
How do we view th ecode for executables??
qwk,grep.fgrep, etc..
any ideas??
as they are written in C , I think , there should be some place where they are placed. (2 Replies)
Discussion started by: singh85
2 Replies
2. Windows & DOS: Issues & Discussions
hello everybody,
I am trying to find the path of the Recycle Bin. I know that it's a temporary storage place, but it should have a path that we can refer to.
I want to know it because I sometimes use cygwin to work on Windows, and when you delete something with it, it's gone. I just checked... (4 Replies)
Discussion started by: milhan
4 Replies
3. Shell Programming and Scripting
Hello, I'm only taking Intro to UNIX in school right now, so please bear with me. My problem is with a sort-of recycle-bin rig I've created for fun. I'm using Ubuntu 9.04, I am the admin. (only user, actually) of this computer. I'm using this script in ~/.bashrc
# if files exist, remove contents... (6 Replies)
Discussion started by: jzacsh
6 Replies
4. Shell Programming and Scripting
Hello,
I have having problems with an assignment and am pretty desperate. My assignment is to create a shell script that does a Recycle_Bin tasks. You can only open this with PuTTY software or Knoppix. Perhaps on other software that are able to read linux language.
My part is stuck... (2 Replies)
Discussion started by: chueu
2 Replies
5. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
A set of Linux shell scripts is required to allow users to ‘remove' files without them really disappearing until... (8 Replies)
Discussion started by: burn88
8 Replies
6. OS X (Apple)
Q1. I understand that /usr/local/bin means I can install/uninstall stuff in here and have any chance of messing up my original system files or effecting any other users. I created this directory myself.
But what about the directory I didn't create, namely /Users/m/bin? How is that directory... (1 Reply)
Discussion started by: michellepace
1 Replies
7. Shell Programming and Scripting
what is recycle bin mode in unix??? (4 Replies)
Discussion started by: arun508.gatike
4 Replies
8. UNIX for Dummies Questions & Answers
Hi.
I'm started to use minix 3.2.1 recently and I'm trying to create a recycle bin for it. I'm kinda struggling on how to do it. I searched internet and I found scripts created for it but I actually didn't learn how to create scripts in college and I'm not sure if I understand them. I just wanted... (1 Reply)
Discussion started by: ReonarudoB
1 Replies
9. Shell Programming and Scripting
Hi.
I've created scripts for a recycle bin that can list, restore and empty it. I only have the problem of deleting two files with the same name. When I do it one file overwrite the other. What could I do to resolve it? The only thing I can think is asking the user to rename file before moving to... (2 Replies)
Discussion started by: ReonarudoB
2 Replies
LEARN ABOUT OPENSOLARIS
getopt
getopt(1) User Commands getopt(1)
NAME
getopt - parse command options
SYNOPSIS
set -- ` getopt optstring $ * `
DESCRIPTION
The getopts command supersedes getopt. For more information, see NOTES below.
getopt is used to break up options in command lines for easy parsing by shell procedures and to check for legal options. optstring is a
string of recognized option letters; see getopt(3C). If a letter is followed by a colon (:), the option is expected to have an argument
which may or may not be separated from it by white space. The special option - is used to delimit the end of the options. If it is used
explicitly, getopt recognizes it; otherwise, getopt generates it; in either case, getopt places it at the end of the options. The posi-
tional parameters ($1 $2 ...) of the shell are reset so that each option is preceded by a - and is in its own positional parameter; each
option argument is also parsed into its own positional parameter.
EXAMPLES
Example 1 Processing the arguments for a command
The following code fragment shows how one might process the arguments for a command that can take the options -a or -b, as well as the
option -o, which requires an argument:
set -- `getopt abo: $*`
if [ $? != 0 ]
then
echo $USAGE
exit 2
fi
for i in $*
do
case $i in
-a | -b) FLAG=$i; shift;;
-o) OARG=$2; shift 2;;
--) shift; break;;
esac
done
This code accepts any of the following as equivalent:
cmd -aoarg filename1 filename2
cmd -a -o arg filename1 filename2
cmd -oarg -a filename1 filename2
cmd -a -oarg -- filename1 filename2
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
|CSI |enabled |
+-----------------------------+-----------------------------+
SEE ALSO
Intro(1), getopts(1), getoptcvt(1), sh(1), shell_builtins(1), getopt(3C), attributes(5)
DIAGNOSTICS
getopt prints an error message on the standard error when it encounters an option letter not included in optstring.
NOTES
getopt will not be supported in the next major release. For this release a conversion tool has been provided, namely, getoptcvt. For more
information, see getopts(1) and getoptcvt(1).
Reset optind to 1 when rescanning the options.
getopt does not support the part of Rule 8 of the command syntax standard (see Intro(1)) that permits groups of option-arguments following
an option to be separated by white space and quoted. For example,
cmd -a -b -o "xxx z yy" filename
is not handled correctly. To correct this deficiency, use the getopts command in place of getopt.
If an option that takes an option-argument is followed by a value that is the same as one of the options listed in optstring (referring to
the earlier EXAMPLES section, but using the following command line:
cmd -o -a filename
getopt always treats it as an option-argument to -o; it never recognizes -a as an option. For this case, the for loop in the example shifts
past the filename argument.
SunOS 5.11 7 Jan 2000 getopt(1)