UNIX for Advanced & Expert Users

Hello all,
my question is whether it possible to get the complete path of a file from the file descriptor iam going through some code for which i dont understood this statement

Code:

ifstream s((const byte*)fd);

what exactly this represents any idea.
which is not properly working is there any way that i can know to get its path to know whethrer that file is opened for writing. please help me.

Not elegantly. You have to get the device and inode, then start from the root of the device and enumerate the directories, do a stat on each entry until you find a match.

And you can get multiple matches for the same inode as a single file can have multiple names.

Also, a file does not *have* to have a name, for instance if you create a file then unlink it before you close it you have a valid file descriptor but no name in the file system.

So a single file can have zero or many names.

thanks u porter,
for quick reply ya tried with the stat and fstat for which iam getting inode as 0, so how to proceed and also is there any alternate for this
line. please tell me

Code:

ifstream s((const byte*)fd);

because from the code iam fetching file descriptors only.