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PTY: Added PTY IOCTL command definitions. Add support for TIOCGPTN. LIB: Implement ptsname() and ptsname_r()
This commit is contained in:
Gregory Nutt
@@ -45,6 +45,10 @@ ifeq ($(CONFIG_FS_WRITABLE),y)
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CSRCS += lib_mktemp.c lib_mkstemp.c
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endif
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ifeq ($(CONFIG_PSEUDOTERM_SUSV1),y)
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CSRCS += lib_ptsname.c lib_ptsnamer.c
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endif
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# Add the stdlib directory to the build
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DEPPATH += --dep-path stdlib
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@@ -0,0 +1,74 @@
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/****************************************************************************
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* libc/stdlib/lib_ptsname.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#ifdef CONFIG_PSEUDOTERM_SUSV1
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ptsname
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*
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* Description:
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* The ptsname() function returns the name of the slave pseudoterminal
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* device corresponding to the master referred to by fd.
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*
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* Returned Values:
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* On success, ptsname() returns a pointer to a string in static storage
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* which will be overwritten by subsequent calls. This pointer must not
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* be freed. On failure, NULL is returned.
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*
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* ENOTTY fd does not refer to a pseudoterminal master device.
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*
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****************************************************************************/
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FAR char *ptsname(int fd)
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{
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static char devname[16];
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int ret = ptsname_r(fd, devname, 16);
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return ret < 0 ? NULL : devname;
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}
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#endif /* CONFIG_PSEUDOTERM_SUSV1 */
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@@ -0,0 +1,95 @@
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/****************************************************************************
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* libc/stdlib/lib_ptsnamer.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <assert.h>
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#ifdef CONFIG_PSEUDOTERM_SUSV1
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ptsname_r
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*
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* Description:
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* The ptsname_r() function is the reentrant equivalent of ptsname().
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* It returns the name of the slave pseudoterminal device as a null-
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* terminated string in the buffer pointed to by buf. The buflen
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* argument specifies the number of bytes available in buf.
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*
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* Returned Values:
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* On success, ptsname_r() returns 0. On failure, a nonzero value is
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* returned and errno is set to indicate the error.
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*
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* EINVAL (ptsname_r() only) buf is NULL.
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* ENOTTY fd does not refer to a pseudoterminal master device.
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* ERANGE (ptsname_r() only) buf is too small.
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*
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****************************************************************************/
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int ptsname_r(int fd, FAR char *buf, size_t buflen)
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{
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int ptyno;
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int ret;
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DEBUGASSERT(buf != NULL);
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/* Get the slave PTY number */
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ret = ioctl(fd, TIOCGPTN, (unsigned long)((uintptr_t)&ptyno));
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if (ret < 0)
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{
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return ret;
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}
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/* Create the device name. This current does not handler EINVAL or ERANGE
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* error detection.
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*/
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snprintf(buf, buflen, "/dev/pts/%d", ptyno);
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return OK;
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}
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#endif /* CONFIG_PSEUDOTERM_SUSV1 */
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