Group Doesn't Exist Post: 302912072

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Homework and Emergencies Homework & Coursework Questions Group Doesn't Exist Post 302912072 by junior-helper on Tuesday 5th of August 2014 01:55:50 PM

08-05-2014

Registered User

Hi dude,
the actual problem is the wrong "if"-statement, one line before the "groupdel" command.
Due to the exclamation mark, it reads like "If the group ... is NOT found, delete it",
but since the group does exist, the else part of that if statement gets triggered.
So you got to remove the exclamation mark (!) in the line 53.

I guess that happened because you copied it from the groupadd section.

Here are some further suggestions:

1. imho you don't need to read from STDIN at the program start, so try this instead:

Code:

my ($group_name, $group_id, $user_name, $user_id, $choice);

2. There is a "-g" option missing between the groupadd command and $group_id

3. groupdel requires groupname as argument, so probably you should remove -g $group_id (see jim's answer)

4. you should not simply system("some-command") and then independently print some status or return code. Try this:

Code:

system ("/usr/sbin/groupadd -g $group_id $group_name && echo 'Success!' || echo 'Error!'");

5. if ($choice == 1) ... elsif ($choice == 2) ... if ($choice == 3) seems not to be consistent

6. If your perl script still misbehaves, consider using the perl debugger: perl -d yourscript.pl

HTH, good luck!

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LEARN ABOUT POSIX

mktemp

MKTEMP(P)						     POSIX Programmer's Manual							 MKTEMP(P)

NAME

       mktemp - make a unique filename (LEGACY)

SYNOPSIS

       #include <stdlib.h>

       char *mktemp(char *template);

DESCRIPTION

       The  mktemp() function shall replace the contents of the string pointed to by template by a unique filename and return template. The appli-
       cation shall initialize template to be a filename with six trailing 'X' s; mktemp() shall replace each 'X' with	a  single  byte  character
       from the portable filename character set.

RETURN VALUE

       The mktemp() function shall return the pointer template.  If a unique name cannot be created, template shall point to a null string.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

   Generating a Filename
       The  following example replaces the contents of the "template" string with a 10-character filename beginning with the characters "file" and
       returns a pointer to the "template" string that contains the new filename.

	      #include <stdlib.h>
	      ...
	      char *template = "/tmp/fileXXXXXX";
	      char *ptr;

	      ptr = mktemp(template);

APPLICATION USAGE

       Between the time a pathname is created and the file opened, it is possible for some other process to create a file with the same name.  The
       mkstemp() function avoids this problem and is preferred over this function.

RATIONALE

       None.

FUTURE DIRECTIONS

       This function may be withdrawn in a future version.

SEE ALSO

       mkstemp() , tmpfile() , tmpnam() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								 MKTEMP(P)

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