C File Manipulation in Linux

drigz · 09-30-2004, 04:28 PM

I need c commands which can do the same as:
{mv,cp} {,-i}
mkdir -p

Currently I'm using system() but it gets very complicated with string separation and stuff. I figured I could do cp by opening the file, reading all its contents and writing it into the destination file (but I'd still need a delete command to do mv), but I have no idea how to do mkdir (I could do the -p activity if I new how to create directories.

Thanks

Mara · 09-30-2004, 05:38 PM

There's mkdir() call. You can read its manual this way: man 2 mkdir. I can't see an equivalent of -p option, so you'd need to write it yourselft (create directries in a loop). Deleting files can be done using unlink() call. Manpage: man 2 unlink.

CroMagnon · 09-30-2004, 06:00 PM

If you don't mind applying the GPL to your code, you can grab copy.c and copy.h from the coreutils package, which has functions to do the work of copying (basically what you already suggested - reading from and writing to files), but I think it would be more work than the system() calls...

drigz · 10-01-2004, 01:15 AM

I was trying to find stuff out by looking at the code of busybox, as it's far simpler than coreutils.... thanks for the help though. Anyone know a function to delete a file?

itsme86 · 10-01-2004, 01:21 AM

Mara gave you one:

Quote:

Deleting files can be done using unlink() call. Manpage: man 2 unlink.

drigz · 10-01-2004, 07:28 AM

i thought that was directories.... sorry - thanks.