Using the "readdir" command

weeshalll · 11-20-2009, 04:56 AM

Hello all .
I have a code which reads all the files from in directory in a loop using the "readdir" command.At the end of the loop i want to print a message saying "All the files have been read".
I want to know whether the command returns any specific error code when all the files have been read.

Thanks in advance

centosboy · 11-20-2009, 05:20 AM

Quote:

Originally Posted by weeshalll

Hello all .
I have a code which reads all the files from in directory in a loop using the "readdir" command.At the end of the loop i want to print a message saying "All the files have been read".
I want to know whether the command returns any specific error code when all the files have been read.

Thanks in advance

if a file has been read in, an exit code of 0 is returned for each file read in. as it is a loop, im afraid a 0 for each line.

of course you can set a condition for the whole script.

weeshalll · 11-20-2009, 06:39 AM

But i want to know what error code would be returned when all the files are
read from that directory ?

centosboy · 11-20-2009, 06:52 AM

Quote:

Originally Posted by weeshalll

But i want to know what error code would be returned when all the files are
read from that directory ?

if this section of the code runs successfully, then 0

weeshalll · 11-20-2009, 06:58 AM

Ohhh .....
Thanks for the reply....
So u mean to say there would be no specific error code to tell me that
all the files in the directory have been read .

bigearsbilly · 11-20-2009, 07:06 AM

read the manual page.

man readdir

Code:

     The readdir() function returns a pointer to the next directory entry.  It
     returns NULL upon reaching the end of the directory or detecting an
     invalid seekdir() operation.


     The readdir_r() function provides the same functionality as readdir(),
     but the caller must provide a directory entry buffer to store the results
     in.  If the read succeeds, result is pointed at the entry; upon reaching
     the end of the directory result is set to NULL.  The readdir_r() function
     returns 0 on success or an error number to indicate failure.

weeshalll · 11-20-2009, 07:18 AM

Thanks a lot !!