Getting file sizes

[mart_man00]

im attempting to get a file's size, with not alot of help. any one know of site with some good info, like cplusplus.com's style.

heres what i was trying.

extern int getfilesize(char *src) {
    struct stat filesize;
    
    stat(src, &filesize);
    
    return (filesize.st_size);
}

i created a txt file and ran this, then i copied and pasted some text into the file and the size didnt change.

[stumon]

This should help, it came from www.experts-exchange.com

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

int main()
{
 struct stat buf;
 int result;
 
 result = stat("C:/yourfilename.txt",&buf);

if( result != 0 )
  {
     perror( "Problem getting information" );
  }
  else
 {
   printf( "File size     : %ld\n", buf.st_size );
}
return 0;
}

[mart_man00]

thats basicly what i had, but with error checking.

[stumon]

Only thing i can think of, is it opening the correct file? try not passing the file name, create a dummy and use that like this program.

[stumon]

What are you trying to pass, the file name? It seems you are passing the address of the array (im guessing its an array), but you're putting it into a single char pointer.

[stumon]

lol, sorry, lot o replies. try this.

extern int getfilesize(char *src[])

[mart_man00]

yeah, i am giving it a array. the array has a filename. the same thing works with functions like fopen, why wouldnt it work here?

[mart_man00]

extern int getfilesize(char *src[])

why not just have the pointer and is a * and [] legal?

[stumon]

arsh, if its just an array, use this.

extern int getfilesize(char src[])

sorry, my mistake.

[mart_man00]

what wrong with the pointer? fopen will use it, and it goes back to the same thing right?

[stumon]

it should, what does the array you are sending look like? whers that code?

[stumon]

Here is an example off your code that works just fine. Hopefully it will help.

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

extern int blat(char *);

int main()
{
	int booty;
	char blah[] = {"c:/yourfilename.txt"};

	booty = blat(blah);
	printf("File size: %ld\n", booty);

return 0;
}

extern int blat(char *blat)
{
	struct stat buf;
	stat(blat,&buf);
	printf("File size: %ld\n", buf.st_size );
	return (buf.st_size);

}

Pardon the names, it was quick.

[mart_man00]

well it turns out i put in the wrong kind of slash!

one more thing, what unit is st_mtime in?

any one know of a cplusplus.com like reference site for this kind of stuff?

[stumon]

I recommend www.experts-exchange.com its pretty good.

The structure stat contains at least the following members:

type name description
dev_t st_dev ID of device containing file
ino_t st_ino file serial number
mode_t st_mode mode of file (see below)
nlink_t st_nlink number of links to the file
uid_t st_uid user ID of file
gid_t st_gid group ID of file
dev_t st_rdev device ID (if file is character or block special)
off_t st_size file size in bytes (if file is a regular file)
time_t st_atime time of last access
time_t st_mtime time of last data modification
time_t st_ctime time of last status change
blksize_t st_blksize a filesystem-specific preferred I/O block size for
this object. In some filesystem types, this may
vary from file to file
blkcnt_t st_blocks number of blocks allocated for this object

[Hammer]

Originally posted by mart_man00
one more thing, what unit is st_mtime in?

any one know of a cplusplus.com like reference site for this kind of stuff?

http://www.rt.com/man/stat.2.html is a good man page site.