c programming

[comfort_17]

I am a very bad c programmer and can not get the following code to work. Please could someone either assist me on how to make the code work or just do the code an email me at comfort_17@yahoo.com. THe code should check the date of a file and output it.

the structure returned include:

st_atime

Time of last file access.

st_ctime

Time of creation of file.

st_dev

If a device, handle; otherwise 0.

st_mode

Bit mask for file-mode information. The _S_IFCHR bit is set if handle refers to a device. The _S_IFREG bit is set if handle refers to an ordinary file. The read/write bits are set according to the file’s permission mode. _S_IFCHR and other constants are defined in SYS\STAT.H.

st_mtime

Time of last modification of file.

st_nlink

Always 1 on non-NTFS file systems.

st_rdev

If a device, handle; otherwise 0.

st_size

Size of the file in bytes.


/* FSTAT.C: This program uses _fstat to report
* the size of a file named F_STAT.OUT.
*/


#include "io.h"
#include "fcntl.h "
#include "time.h "
#include "sys/types.h "
#include "sys/stat.h "
#include "stdio.h "
#include "stdlib.h "
#include "string.h"

void main( void )
{
struct _stat buf;
int fh, result;
char buffer[] = "A line to output";

if( (fh = _open( "f_stat.out", _O_CREAT | _O_WRONLY |
_O_TRUNC )) == -1 )
_write( fh, buffer, strlen( buffer ) );

/* Get data associated with "fh": */
result = _fstat( fh, &buf );

/* Check if statistics are valid: */
if( result != 0 )
printf( "Bad file handle\n" );
else
{
printf( "File size : %ld\n", buf.st_size );

printf( "Time modified : %s", ctime( &buf.st_ctime ) );
}
_close( fh );
}


Output

File size : 0
Time modified : Tue Mar 21 15:23:08 1995

[comfort_17]

COuld someone please tell me how i can alter the code to type in an address of a file and it then outputs the details i require.

[DrPC]

Please can you expand on exactly what you mean by "Entering the Address of the File"

[comfort_17]

I have now found a way of typing in the path of the file but it overwrites the
original file deleting all its contents. Do you know a way of displaying

TIme created:
Time Modified:

And comparing the two outputs?

[DrPC]

Try removing the "| _O_TRUNC" parameter. This parameter destroys the content of the file first.

To output the two times:

printf( "Time created : %s", ctime( &buf.st_ctime ) );
printf( "Time modified : %s", ctime( &buf.st_mtime ) );


To compare the two times you need to use a function called "difftime"
For example,

double time_difference = difftime( &buf.st_mtime, &buf.st_ctime );

if (time_difference > 0)
{
//file has been modified
}
else
{
//file hasn't been modified
}

[comfort_17]

THank you very much for your time an dpatience. How do i alter WRONLY to read only?

[DrPC]

Change _O_WRONLY for _O_RDONLY

[comfort_17]

any chance you know how to set up a scanf that reads in the file typed in by th euser and then displays the details on the file. Then display teh details with the filename on the output

eg.
File ----> demo.txt


FileName= demo.txt
Size= ???
Dates= ????

[DrPC]

Give the attached file a try. I think it does what you are asking.