11-11-2016
As Don says, it's not possible to determine what this code is actually doing. However, it occurs to me that, it could be simply creating a link (and leaving the original file in-situ). If you then stat the link (inode) location you will likely get a zero length. However, when you list that link it will show the original file size.
However, please answer Don's questions and post what OS you are using.
Last edited by hicksd8; 11-11-2016 at 07:40 AM..
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SYMLINK(2) System Calls Manual SYMLINK(2)
NAME
symlink - make symbolic link to a file
SYNOPSIS
symlink(name1, name2)
char *name1, *name2;
DESCRIPTION
A symbolic link name2 is created to name1 (name2 is the name of the file created, name1 is the string used in creating the symbolic link).
Either name may be an arbitrary path name; the files need not be on the same file system.
RETURN VALUE
Upon successful completion, a zero value is returned. If an error occurs, the error code is stored in errno and a -1 value is returned.
ERRORS
The symbolic link is made unless on or more of the following are true:
[ENOTDIR] A component of the name2 prefix is not a directory.
[EINVAL] Either name1 or name2 contains a character with the high-order bit set.
[ENAMETOOLONG] A component of either pathname exceeded 255 characters, or the entire length of either path name exceeded 1023 characters.
[ENOENT] The named file does not exist.
[EACCES] A component of the name2 path prefix denies search permission.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[EEXIST] Name2 already exists.
[EIO] An I/O error occurred while making the directory entry for name2, or allocating the inode for name2, or writing out the link
contents of name2.
[EROFS] The file name2 would reside on a read-only file system.
[ENOSPC] The directory in which the entry for the new symbolic link is being placed cannot be extended because there is no space left
on the file system containing the directory.
[ENOSPC] The new symbolic link cannot be created because there there is no space left on the file system that will contain the sym-
bolic link.
[ENOSPC] There are no free inodes on the file system on which the symbolic link is being created.
[EDQUOT] The directory in which the entry for the new symbolic link is being placed cannot be extended because the user's quota of
disk blocks on the file system containing the directory has been exhausted.
[EDQUOT] The new symbolic link cannot be created because the user's quota of disk blocks on the file system that will contain the
symbolic link has been exhausted.
[EDQUOT] The user's quota of inodes on the file system on which the symbolic link is being created has been exhausted.
[EIO] An I/O error occurred while making the directory entry or allocating the inode.
[EFAULT] Name1 or name2 points outside the process's allocated address space.
SEE ALSO
link(2), ln(1), unlink(2)
4.2 Berkeley Distribution August 26, 1985 SYMLINK(2)