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Top Forums UNIX for Dummies Questions & Answers Help with my recycle bin code Post 302502319 by Corona688 on Monday 7th of March 2011 03:53:45 PM
Old 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..
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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. SunOS 5.10 30 Aug 2004 getusershell(3C)
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