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readdir_r()

Get information about the next matching filename

Synopsis:

#include <sys/types.h>
#include <dirent.h>

int readdir_r( DIR * dirp,
               struct dirent * entry,
               struct dirent ** result );

Arguments:

dirp
A pointer to the directory stream to be read.
entry
A pointer to a dirent structure where the function can store the directory entry.
result
The address of a location where the function can store a pointer to the information found.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

If _POSIX_THREAD_SAFE_FUNCTIONS is defined, readdir_r() initializes the dirent structure referenced by entry with the directory entry at the current position in the directory stream referred to by dirp, and stores a pointer to this structure in result.

The storage pointed by entry must be large enough for a dirent structure with the s_name member an array of char containing at least NAME_MAX plus one element.


Note: The struct dirent structure doesn't include space for the pathname; you must provide it. For example:
struct dirent *entry;
entry = malloc( offsetof(struct dirent, d_name) + NAME_MAX + 1 );

Returns:

EOK
Success.
EBADF
The dirp argument doesn't refer to an open directory stream.
EOVERFLOW
One of the values in the structure to be returned can't be represented correctly.

Classification:

POSIX 1003.1 TSF

Safety:
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes

See also:

closedir(), dirent, errno, opendir(), readdir(), seekdir(), telldir(), rewinddir()


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