UNIX for Advanced & Expert Users

Hi all,

I have scenario here , In my C program i check the stat for a file as
stat(fname, &stat_buf);

If it is succesfull, i will process else i will make my program to fail.

The file which i am checking has no stat information. What might be the reason, file has no stat information even though it has all data loaded

I am using HP unix

(sys05nmx:/pmx/d4>) ll 173_i.001
-rw-rw-rw- 1 pmx00 pmx 4941517719 Oct 6 13:37 173_i.001



(sys05nmx:/pmx/d4>)stat 173_i.001
Can't lstat 100373_ipd.001


Please help, stat is working for all other files , only for this file it is not working what might be the reason.

Thanks in Advance,
Arun

The stat() function call returns -1 on error. Are you checking the return code?
Then finding what errno references to produce a meaningful error message?
perror() will do that for you.

lstat() works on symlinks only -- you aren't calling lstat? Even though your error message says so.

These are the two calls you should be using. stat() is a much more likely choice.

Code:

int stat(const char *path, struct stat *buf);
int fstat(int filesdes, struct stat *buf);

This is my Code

ret = stat(fname, &stat_buf);
if (ret == 0)
return &stat_buf;
else
{
fprintf(stderr,"stat: Can't get filesystem information\n");
fprintf(stderr,"stat: Current file %s\n", fname);
perror("stat");
abort();
}


The below is the error

stat: Can't get filesystem information
stat: Current file /pmx/d4/173_i.001
stat: Value too large to be stored in data type
sm_au3[336]: 4740 Abort(coredump)



I am trying to find the stat for a file with size 4.60215 GB , Is it caousing the problem,
I mean the file size is a problem ???

Thanks in Advance,
Arun

You have a largefiles problem. Base stat has a size_t st.size element. It can handle up to the max un unsigned loing value can store.

If the output of this:

Code:

getconf ULONG_MAX

is less than the size of the file then that is your problem. You will have to do some reading on large files for your system - there may be a stat64 or fstat64 call which will handle the issue. What OS?

Thanks for your answer

This is in HP UNIX

Then you do have stat64(), fopen64() etc.

man stat64 will explain it.

Do a Web search for LFS (Large File Summit) for more information about file size limitations on ILP32 data models and how this problem was overcome.