Capturing file stat information

I am trying to complete a uni assignment - which is to capture the stat information of a file, save the stat info to a file - and then later retreive the information and compare it the the current stat info - to see if there have been any changes to the original file stat info.

So far I have the following:

#include <sys/type.h>
#include <sys/stat.h>
#include <stdio.h>

main()
{
struct stat file_info;
FILE *fp;

fp = fopen("myfile", "w");

stat("testfile", &file_info);
fprintf(fp, %d\n", file_info);

fclose(fp);
exit(0);
}

I think there are problems with the fprintf statement - I am not sure about the %d (as I guess the info is not all integers) - but an not sure what to put there in order to capture the entire stat information into myfile.

I would appreciate any help...

Many thanks
Sue

Depends if you want to be able to read the data file with a text editor when you're done

If you want to read it, do this
fprintf(fp, "%d\n", file_info.st_size);
fprintf(fp, "%d\n", file_info.st_mode);
// etc, for all the members of the structure


Or if you just want to save the raw info, try
fp = fopen("myfile", "wb"); // "b" for binary
fwrite( &file_info, sizeof(file_info), 1, fp );

Thanks Salem,

I would like to save the info as binary - and then later read the file - and display the contents to screen - just to verify I have picked up something at all!

I have tried to use fread(&file_info, sizeof(file_info),1,fp) to read my captured info - but the compiler advises that it doesn't know the size of file_info - can anyone suggest how I would determine this - without hard coding the size?

Thanks
Sue

Try using sizeof(struct stat). This should work.