Removing the same file from two consoles

Removing the same file from two consoles

[Alex Vinokur]

Here is some program which was invocated on two consoles.


The program behavior is different on
 * Cygwin, DJGPP on the one hand
   and
 * Mingw on the other hand
 environments.


Which is right/correct/preferable?


========= C-code : BEGIN =========
/* File t.c */

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>

int main(int argc, char** argv)
{
int  rc;
char ch;
FILE* fp;
int i;

  assert (argc > 1);

  printf ("Command line : ");
  for (i = 0; i < argc; i++) printf ("%s ", argv[i]);
  printf ("\n");

  errno = 0;
  rc = access (argv[1], F_OK);
  printf ("access : rc = %d; errno = %u (%s)\n", rc, errno, strerror(errno));

  errno = 0;
  rc = remove (argv[1]);
  printf ("remove : rc = %d; errno = %u (%s)\n", rc, errno, strerror(errno));

  fp = fopen (argv[1], "w");
  printf ("fopen  : %s\n", (fp ? "OK" : "FAILURE"));

  printf ("Enter any key : ");
  scanf ("%c", &ch);

  errno = 0;
  rc = access (argv[1], F_OK);
  printf ("access : rc = %d; errno = %u (%s)\n", rc, errno, strerror(errno));

  printf ("Thanks. Bye\n");

  return 0;
}

========= C-code : END ===========






######### Run via Cygwin : BEGIN #########
=========================================
Windows 2000
CYGWIN_NT-5.0 1.3.22(0.78/3/2)
GNU gcc version 3.2 20020927 (prerelease)
=========================================


====================================
Step 0. Compiling and getting status
====================================
------ Console-0 ------
$ gcc t.c -o progc
-----------------------


=================================================
Step 1. removing and fopening a file on Console-1
=================================================
------ Console-1 ------
$ progc foo
Command line : progc foo
access : rc = -1; errno = 2 (No such file or directory)
remove : rc = -1; errno = 2 (No such file or directory)
fopen  : OK
Enter any key :
-----------------------


========================================================
Step 2. removing and fopening the same file on Console-2
========================================================
------ Console-2 ------
$ progc foo
Command line : progc foo
access : rc = 0; errno = 0 (No error)
remove : rc = 0; errno = 0 (No error)
fopen  : FAILURE
Enter any key :
-----------------------


======================================
Step 3. Entering some key on Console-2
======================================
------ Console-2 ------
----- continuation ----
Enter any key : a
access : rc = -1; errno = 13 (Permission denied)
Thanks. Bye
-----------------------


======================================
Step 4. Entering some key on Console-1
======================================
------ Console-1 ------
----- continuation ----
Enter any key : b
access : rc = -1; errno = 2 (No such file or directory)
Thanks. Bye
-----------------------


######### Run via Cygwin : END ###########






######### Run via Mingw : BEGIN #########
====================
Windows 2000
MinGW 2.0.0.-2
GNU gcc version 3.2
===================



====================================
Step 0. Compiling and getting status
====================================
------ Console-0 ------
$ gcc t.c -o progm
-----------------------


=================================================
Step 1. removing and fopening a file on Console-1
=================================================
------ Console-1 ------
$ progm foo
Command line : progm.exe foo
access : rc = -1; errno = 2 (No such file or directory)
remove : rc = -1; errno = 2 (No such file or directory)
fopen  : OK
Enter any key :
-----------------------


========================================================
Step 2. removing and fopening the same file on Console-2
========================================================
------ Console-2 ------
$ progm foo
Command line : progm.exe foo
access : rc = 0; errno = 0 (No error)
remove : rc = -1; errno = 13 (Permission denied)
fopen  : OK
Enter any key :
-----------------------


======================================
Step 3. Entering some key on Console-2
======================================
------ Console-2 ------
----- continuation ----
Enter any key : a
access : rc = 0; errno = 0 (No error)
Thanks. Bye
-----------------------


======================================
Step 4. Entering some key on Console-1
======================================
------ Console-1 ------
----- continuation ----
Enter any key : b
access : rc = 0; errno = 0 (No error)
Thanks. Bye
-----------------------


######### Run via Mingw : END ###########


   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================








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Re: Removing the same file from two consoles

[Christopher Faylor]

On Thu, Sep 11, 2003 at 06:22:58PM +0300, Alex Vinokur wrote:
>Here is some program which was invocated on two consoles.
>
>
>The program behavior is different on
> * Cygwin, DJGPP on the one hand
>   and
> * Mingw on the other hand
> environments.
>
>
>Which is right/correct/preferable?

Cygwin's of course.

You may get a different answer if you ask this question in the mingw
mailing list, though.

cgf

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Re: Removing the same file from two consoles

[Alex Vinokur]

"Christopher Faylor" <cgf-rcm@cygwin.com> wrote in message news:20030911153224.GC5796@redhat.com...
> On Thu, Sep 11, 2003 at 06:22:58PM +0300, Alex Vinokur wrote:
> >Here is some program which was invocated on two consoles.
> >
> >
> >The program behavior is different on
> > * Cygwin, DJGPP on the one hand
> >   and
> > * Mingw on the other hand
> > environments.
> >
> >
> >Which is right/correct/preferable?
>
> Cygwin's of course.
>
> You may get a different answer if you ask this question in the mingw
> mailing list, though.
>
> cgf
>
Is there any UNIX-related standard/convention about this topic?

--
   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================




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