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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 direct ** 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.

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The struct dirent structure doesn't include space for the pathname. You must provide it: struct dirent *entry; entry = malloc( sizeof(*entry) + NAME_MAX + 1 );

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Returns:

EOK

Success.

On failure, errno is set.

Errors:

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

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