Hallo, dies ist ein Test.

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'\" te .\" Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. .TH ldi_read 9F "3 June 2003" "Oracle Solaris 11.4" "Kernel Functions" .SH NAME ldi_read, ldi_write \- Read and write from a device .SH SYNOPSIS .LP .nf #include <sys/sunldi.h> \fB\fR\fBint\fR ldi_read(\fBldi_handle_t\fR \fIlh\fR, \fBstruct uio *\fR\fIuiop\fR, \fBcred_t *\fR\fIcr\fR); .fi .LP .nf \fBint\fR \fB ldi_write\fR(\fBldi_handle_t\fR \fIlh\fR, \fBstruct uio *\fR\fIuiop\fR, \fBcred_t *\fR\fIcr\fR); .fi .SH PARAMETERS .sp .ne 2 .mk .na \fB\fIlh\fR \fR .ad .RS 8n .rt Layered handle. .RE .sp .ne 2 .mk .na \fB\fIcr\fR \fR .ad .RS 8n .rt Pointer to a credential structure used to open a device. .RE .sp .ne 2 .mk .na \fB\fIuiop\fR \fR .ad .RS 8n .rt Pointer to the \fBuio(9S)\fR structure. \fBuio(9S)\fR specifies the location of the read or write data. (Either userland or kernel.) .RE .SH DESCRIPTION .sp .LP The \fBldi_read()\fR function passes a read request to the device entry point for the device specified by the layered handle. This operation is supported for block, character, and streams devices. .sp .LP The \fBldi_write()\fR function passes a write request to the device entry point for a device specified by the layered handle. This operation is supported for block, character, and streams devices. .SH RETURN VALUES .sp .LP The \fBldi_read()\fR and \fBldi_write()\fR functions return \fB0\fR upon success. If a failure occurs before the request is passed to the device, the possible return values are shown below. Otherwise any other error number may be returned by the device. .sp .ne 2 .mk .na \fBEINVAL\fR .ad .RS 11n .rt Invalid input parameters. .RE .sp .ne 2 .mk .na \fBENOTSUP\fR .ad .RS 11n .rt Operation is not supported for this device. .RE .SH CONTEXT .sp .LP These functions may be called from user or kernel context.