Filnames and timestamps

[milkyway]

Hello out there,

I would like to create a filename where the name of the file is:

ERRORS_MMDDYYYY_HHMMSS.

Is there a way that this can be done?

Any help, hints or advice would be appreciated ;-)

TIA

 

[David Resnick]

Hello out there,

I would like to create a filename where the name of the file is:

ERRORS_MMDDYYYY_HHMMSS.

Is there a way that this can be done?

Any help, hints or advice would be appreciated ;-)

TIA

Look up localtime and sprintf.

-David

 

[Gordon Burditt]

I would like to create a filename where the name of the file is:

ERRORS_MMDDYYYY_HHMMSS.

Is there a way that this can be done?

sprintf() is your friend when constructing filenames (or other
strings) from pieces, although in this case strftime() may be more
useful. And, of course, there's fopen() to actually create the
file.

If the time desired is the CURRENT time, use time() to get the time
(a time_t) and localtime() to break it down into something suitable
(a struct tm) to feed to strftime().

Gordon L. Burditt

 

[milkyway]

Thanks but are there any sample programs of how to use this lying
around?

 

[Irrwahn Grausewitz]

Please preserve some context when posting replies.


[ I would like to create a filename where the name of the file is:
ERRORS_MMDDYYYY_HHMMSS. ]

Thanks but are there any sample programs of how to use this lying
around?

A quick and dirty demo program:


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

#define FILENAMELEN 23

int main( void )
{
char filename[FILENAMELEN];
time_t curtime;
struct tm *loctimep;

curtime = time( NULL );
if ( curtime == -1 )
{
fputs( "Calendar time not available\n", stderr );
exit( EXIT_FAILURE );
}

loctimep = localtime( &curtime );
if ( loctimep == NULL )
{
fputs( "Time conversion error\n", stderr );
exit( EXIT_FAILURE );
}

if ( strftime( filename, FILENAMELEN,
"ERRORS_%m%d%Y_%H%M%S", loctimep ) == 0 )
{
fputs( "Generated filename too long\n", stderr );
exit( EXIT_FAILURE );
}

printf( "Generated filename: %s\n", filename );
exit( EXIT_SUCCESS );
}


HTH
BEst regards

 

[milkyway]

Thank you ;-)

 

[Emmanuel Delahaye]

milkyway wrote on 13/09/05 :

I would like to create a filename where the name of the file is:

ERRORS_MMDDYYYY_HHMMSS.

Is there a way that this can be done?

Any help, hints or advice would be appreciated ;-)

A file name is just another string.

time()
localtime()
strftime()

--
Emmanuel
The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
The C-library: http://www.dinkumware.com/refxc.html

"Clearly your code does not meet the original spec."
"You are sentenced to 30 lashes with a wet noodle."
-- Jerry Coffin in a.l.c.c++

 

[Emmanuel Delahaye]

Irrwahn Grausewitz wrote on 14/09/05 :

if ( strftime( filename, FILENAMELEN,
"ERRORS_%m%d%Y_%H%M%S", loctimep ) == 0 )

Correct, but there is a design issue : for future chronological sort
help, I recommend to use the ISO date format

if (strftime (filename, FILENAMELEN,
"ERRORS_%Y%d%m_%H%M%S", loctimep) == 0)

--
Emmanuel
The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
The C-library: http://www.dinkumware.com/refxc.html

"There are 10 types of people in the world today;
those that understand binary, and those that dont."

 

[Irrwahn Grausewitz]

Irrwahn Grausewitz wrote on 14/09/05 :


Correct, but there is a design issue : for future chronological sort
help, I recommend to use the ISO date format

if (strftime (filename, FILENAMELEN,
"ERRORS_%Y%d%m_%H%M%S", loctimep) == 0)

Right, I'd do the same, I just wanted to stick with the OP's
filename format specification:

Additionally, my code miserably fails if year > 9999.

Best Regards