find command

busyfire · 02-24-2009, 01:09 AM

what the find command does to recursively traverse directories and examine all the directory entries...i have to write it in c...

jlinkels · 02-24-2009, 01:52 AM

Implementing the full find command in C? That is big task!

Anyway, the principle is to get a directory listing, (http://www.gnu.org/software/libtool/...rectory-Lister), and descend into each directory and get a listing again by calling the same function etc. until you don't find any directory entries to descend into.

jlinkels

Hko · 02-24-2009, 02:25 AM

Quote:

Originally Posted by busyfire

what the find command does to recursively traverse directories and examine all the directory entries...i have to write it in c...

The function ftw() (ftw = file tree walk) can do most of it for you. At the bottom of "man ftw" there is a complete code example.

theNbomr · 02-24-2009, 09:35 AM

Quote:

Originally Posted by Hko

The function ftw() (ftw = file tree walk) can do most of it for you. At the bottom of "man ftw" there is a complete code example.

Or, you can roll your own, using opendir() + readdir() + closedir() This allows you to control whether you want to do a depth-first, or breadth-first traversal.
--- rod.

busyfire · 02-25-2009, 01:12 AM

Quote:

Originally Posted by Hko

The function ftw() (ftw = file tree walk) can do most of it for you. At the bottom of "man ftw" there is a complete code example.

thanks man...but how we get the dirpath...how the dirpath gets the path..

Hko · 02-25-2009, 05:24 AM

Quote:

Originally Posted by busyfire

thanks man...but how we get the dirpath...how the dirpath gets the path..

Eh.. Just pass the path as a string to the ftw() function. How te get the string? That depends on the program you're making. It is for you to decide, you're the programmer...