io\_uring\_prep\_unlinkat(3) liburing Manual io\_uring\_prep\_unlinkat(3)

# [NAME](#NAME)

io\_uring\_prep\_unlinkat - prepare an unlinkat request

# [SYNOPSIS](#SYNOPSIS)

```
#include <fcntl.h>
#include <unistd.h>
#include <liburing.h>
```

```
void io_uring_prep_unlinkat(struct io_uring_sqe *sqe,
                            int dirfd,
                            const char *path,
                            int flags);
```

```
void io_uring_prep_unlink(struct io_uring_sqe *sqe,
                          const char *path,
                          int flags);
```

# [DESCRIPTION](#DESCRIPTION)

The [**io\_uring\_prep\_unlinkat**(3)](/man/os/liburing/io_uring_prep_unlinkat.3) function prepares an unlinkat request. The submission queue entry *sqe* is setup to use the directory file descriptor pointed to by *dirfd* to start an unlinkat operation on the path identified by *path* and using the flags given in *flags*.

The [**io\_uring\_prep\_unlink**(3)](/man/os/liburing/io_uring_prep_unlink.3) function prepares an unlink request. The submission queue entry *sqe* is setup to start an unlinkat operation on the path identified by *path* relative to the current working directory and using the flags given in *flags*.

These functions prepare an async [**unlinkat**(2)](/man/os/liburing/unlinkat.2) or [**unlink**(2)](/man/os/liburing/unlink.2) request. See those man pages for details.

# [RETURN VALUE](#RETURN_VALUE)

None

# [ERRORS](#ERRORS)

The CQE *res* field will contain the result of the operation. See the related man page for details on possible values. Note that where synchronous system calls will return **-1** on failure and set *errno* to the actual error value, io\_uring never uses *errno*. Instead it returns the negated *errno* directly in the CQE *res* field.

# [NOTES](#NOTES)

As with any request that passes in data in a struct, that data must remain valid until the request has been successfully submitted. It need not remain valid until completion. Once a request has been submitted, the in-kernel state is stable. Very early kernels (5.4 and earlier) required state to be stable until the completion occurred. Applications can test for this behavior by inspecting the **IORING\_FEAT\_SUBMIT\_STABLE** flag passed back from [**io\_uring\_queue\_init\_params**(3)](/man/os/liburing/io_uring_queue_init_params.3).

# [SEE ALSO](#SEE_ALSO)

[**io\_uring\_get\_sqe**(3)](/man/os/liburing/io_uring_get_sqe.3), [**io\_uring\_submit**(3)](/man/os/liburing/io_uring_submit.3), [**unlinkat**(2)](/man/os/liburing/unlinkat.2), [**unlink**(2)](/man/os/liburing/unlink.2)

March 13, 2022 liburing-2.2

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Document: io_uring_prep_unlink(3) from liburing 2.15-r5 (Chainguard OS)
Source: https://github.com/axboe/liburing.git