Deleting a File

[kvnsmnsn]

I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work. But I'm wondering, is there a better way to do this
in C? Any information on this would be greatly appreciated.

---Kevin Simonson

"You'll never get to heaven, or even to LA,
if you don't believe there's a way."
from _Why Not_

[Richard Tobin]

In article <11*********************@y80g2000hsf.googlegroups. com>,
<kv******@hotmail.comwrote:

>I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work.

Well, it will work on systems where the delete is "rm".

>But I'm wondering, is there a better way to do this
in C?

Yes, the remove() function.

-- Richard
--
"Consideration shall be given to the need for as many as 32 characters
in some alphabets" - X3.4, 1963.

[Flash Gordon]

kv******@hotmail.com wrote, On 23/04/07 22:58:

I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work. But I'm wondering, is there a better way to do this
in C? Any information on this would be greatly appreciated.

remove("Abc.Txt");

You should check the value returned to see if it succeeded.
--
Flash Gordon

[Ben Pfaff]

kv******@hotmail.com writes:

I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work. But I'm wondering, is there a better way to do this
in C? Any information on this would be greatly appreciated.

#include <stdio.h>

remove ("Abc.Txt");
--
"IMO, Perl is an excellent language to break your teeth on"
--Micah Cowan

[Martin Ambuhl]

kv******@hotmail.com wrote:

I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work. But I'm wondering, is there a better way to do this
in C? Any information on this would be greatly appreciated.

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
return remove("Abc.Txt") ? EXIT_FAILURE : 0;
}

[Richard Bos]

ri*****@cogsci.ed.ac.uk (Richard Tobin) wrote:

In article <11*********************@y80g2000hsf.googlegroups. com>,
<kv******@hotmail.comwrote:

I'm at a point in my code where I need to delete a file. For right
now I'm going to use the <system()function like so:

But I'm wondering, is there a better way to do this
in C?

Yes, the remove() function.

And, surprise, surprise, this is in the FAQ:
<http://c-faq.com/osdep/delete.html>.

Richard

[CBFalconer]

Martin Ambuhl wrote:

kv******@hotmail.com wrote:

>I'm at a point in my code where I need to delete a file. For
right now I'm going to use the <system()function like so:

system( "rm Abc.Txt");

which will work. But I'm wondering, is there a better way to do
this in C? Any information on this would be greatly appreciated.

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
return remove("Abc.Txt") ? EXIT_FAILURE : 0;
}

We can improve this:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{ int result;

result = 0;
while (argc 1) {
shift(); /* questionable */
if (remove(argv[0])) result = EXIT_FAILURE;
}
return result;
}

:-)

--
<http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfocus.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline.net
--
Posted via a free Usenet account from http://www.teranews.com

[kvnsmnsn]

Thanks! These replies were very helpful.

[zero]

CBFalconer <cb********@yahoo.comwrote in
news:46***************@yahoo.com:

>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{ int result;

result = 0;
while (argc 1) {
shift(); /* questionable */

What does this do, and why is it questionable?

if (remove(argv[0])) result = EXIT_FAILURE;
}
return result;
}

Isn't argv[0] the executable? I would expect something like this:

while( ++argv )
{
if ( remove( *argv ) && !result )
result = EXIT_FAILURE;
}

[Walter Roberson]

In article <46***************@yahoo.com>,
CBFalconer <cb********@maineline.netwrote:

>We can improve this:

>#include <stdio.h>
#include <stdlib.h>

>int main(int argc, char **argv)
{ int result;

result = 0;
while (argc 1) {
shift(); /* questionable */
if (remove(argv[0])) result = EXIT_FAILURE;
}
return result;
}

It appears to me that you are expecting the undefined routine
shift() to move argv to the next argv value, decrementing argc.
Or at least shift() is not defined by C89...

--
Prototypes are supertypes of their clones. -- maplesoft

[Flash Gordon]

zero wrote, On 24/04/07 19:11:

CBFalconer <cb********@yahoo.comwrote in
news:46***************@yahoo.com:

>#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{ int result;

result = 0;
while (argc 1) {
shift(); /* questionable */

What does this do, and why is it questionable?

It is a function that Chuck did not provide, probably deliberately.

> if (remove(argv[0])) result = EXIT_FAILURE;
}
return result;
}

Isn't argv[0] the executable?

I suspect that was deliberate as well.

I would expect something like this:

while( ++argv )
{
if ( remove( *argv ) && !result )
result = EXIT_FAILURE;
}

That would not be anywhere near as much fun :-)
--
Flash Gordon