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Undo part of a previous change. Move get/sethostname back from net/netdb to libc/unistd

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This commit is contained in:
Gregory Nutt 2015-07-08 11:11:52 -06:00
parent 4e98d01098
commit f94fe747ae
13 changed files with 73 additions and 530 deletions
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2
configs

@ -1 +1 @@
Subproject commit ef0ed726cc999572b60228cc8a4f482f53e6a228
Subproject commit 6112bb038416a3553504fad20eca1bd39f79b371

2
include/netdb.h
View File

@ -172,6 +172,8 @@ struct hostent
* terminated by a null pointer. */
};
#define h_addr h_addr_list[0] /* For backward compatibility */
struct netent
{
FAR char *n_name; /* Official, fully-qualified (including the domain)

127
include/nuttx/net/netdb.h
View File

@ -1,127 +0,0 @@
/****************************************************************************
* include/nuttx/net/netdb.h
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Includes some definitions that a compatible with the LGPL GNU C Library
* header file of the same name.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_NET_NETDB_H
#define __INCLUDE_NUTTX_NET_NETDB_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <nuttx/net/netconfig.h>
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: netdb_gethostname
*
* Description:
* The netdb_gethostname() function will return the standard host name for
* the current machine. The namelen argument will specify the size of the
* array pointed to by the name argument. The returned name will be null-
* terminated, except that if namelen is an insufficient length to hold the
* host name, then the returned name will be truncated and it is
* unspecified whether the returned name is null-terminated.
*
* Host names are limited to {HOST_NAME_MAX} bytes.
*
* Input Parameters:
* name - The user-provided buffer to receive the host name.
* namelen - The size of the user provided buffer in bytes.
*
* Returned Value:
* Upon successful completion, 0 will be returned; otherwise, -1 will be
* returned. No errors are defined; errno variable is not set.
*
****************************************************************************/
int netdb_gethostname(FAR char *name, size_t namelen);
/****************************************************************************
* Name: netdb_sethostname
*
* Description:
*
* netdb_sethostname() sets the hostname to the value given in the
* character array name. The len argument specifies the number of bytes in
* name. (Thus, name does not require a terminating null byte.)
*
* Input Parameters:
* name - The user buffer to providing the new host name.
* namelen - The size of the user buffer in bytes.
*
* Returned Value:
* Upon successful completion, 0 will be returned; otherwise, -1 will be
* returned. No errors are defined; errno variable is not set.
*
****************************************************************************/
int netdb_sethostname(FAR const char *name, size_t size);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __INCLUDE_NUTTX_NET_NETDB_H */

3
libc/misc/lib_utsname.c
View File

@ -43,7 +43,6 @@
#include <string.h>
#include <nuttx/version.h>
#include <nuttx/net/netdb.h>
/* In the protected and kernel build modes where kernel and application code
* are separated, some of these common system property must reside only in
@ -101,7 +100,7 @@ int uname(FAR struct utsname *name)
#ifdef CONFIG_NET
/* Get the hostname */
if (-1 == netdb_gethostname(name->nodename, HOST_NAME_MAX))
if (-1 == gethostname(name->nodename, HOST_NAME_MAX))
{
ret = -1;
}

41
libc/unistd/lib_gethostname.c
View File

@ -2,7 +2,9 @@
* libc/unistd/lib_gethostname.c
*
* Copyright (C) 2015 Stavros Polymenis. All rights reserved.
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Stavros Polymenis <sp@orbitalfox.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -43,7 +45,7 @@
#include <string.h>
#include <unistd.h>
#include <nuttx/net/netdb.h>
#include <arch/irq.h>
/* This file is only compiled if network support is enabled */
@ -53,6 +55,22 @@
* Pre-processor Definitions
****************************************************************************/
/* The default host name is a system configuration setting. This may be
* changed via sethostname(), however.
*/
#ifndef CONFIG_NET_HOSTNAME
# define CONFIG_NET_HOSTNAME ""
#endif
/****************************************************************************
* Public Data
****************************************************************************/
/* This is the system hostname */
char g_hostname[HOST_NAME_MAX + 1] = CONFIG_NET_HOSTNAME;
/****************************************************************************
* Public Functions
****************************************************************************/
@ -94,6 +112,21 @@ int gethostname(FAR char *name, size_t namelen)
#if (!defined(CONFIG_BUILD_PROTECTED) && !defined(CONFIG_BUILD_KERNEL)) || \
defined(__KERNEL__)
irqstate_t flags;
/* Return the host name, truncating to fit into the user provided buffer.
* The hostname is global resource. There is a microscopic possibility
* that it could change while we are copying it.
*/
flags = irqsave();
strncpy(name, g_hostname, namelen);
irqrestore(flags);
return 0;
#else
struct utsname info;
int ret;
@ -110,12 +143,6 @@ int gethostname(FAR char *name, size_t namelen)
strncpy(name, info.nodename, namelen);
return 0;
#else
/* Otherwise, this function is just a thin wrapper around
* netdb_gethostname().
*/
return netdb_gethostname(name, namelen);
#endif
}

38
libc/unistd/lib_sethostname.c
View File

@ -39,9 +39,10 @@
#include <nuttx/config.h>
#include <string.h>
#include <unistd.h>
#include <nuttx/net/netdb.h>
#include <arch/irq.h>
/* This file is only compiled if network support is enabled */
@ -60,6 +61,26 @@
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/* This is the system hostname (defined in lib_gethostname). */
extern char g_hostname[HOST_NAME_MAX + 1];
/****************************************************************************
* Public Functions
****************************************************************************/
@ -89,9 +110,20 @@
int sethostname(FAR const char *name, size_t size)
{
/* This is just a thin layer over netdb_sethostname() */
irqstate_t flags;
return netdb_sethostname(name, size);
/* Save the new host name, truncating to HOST_NAME_MAX if necessary. This
* internal copy is always NUL terminated. The hostname is global resource.
* There is a microscopic possibility that it could be accessed while we
* are setting it.
*/
flags = irqsave();
strncpy(g_hostname, name, MIN(HOST_NAME_MAX, size));
g_hostname[HOST_NAME_MAX] = '\0';
irqrestore(flags);
return 0;
}
#endif /* CONFIG_NET */

1
net/Makefile
View File

@ -68,7 +68,6 @@ include local/Make.defs
include tcp/Make.defs
include udp/Make.defs
include devif/Make.defs
include netdb/Make.defs
include route/Make.defs
include utils/Make.defs
endif

1
net/README.txt
View File

@ -21,7 +21,6 @@ Directory Structure
+- route - Routing table support
+- tcp - Transmission Control Protocol
+- udp - User Datagram Protocol
+- netdb - Host name support
`- utils - Miscellaneous utility functions

43
net/netdb/Make.defs
View File

@ -1,43 +0,0 @@
############################################################################
# net/netdb/Make.defs
#
# Copyright (C) 2015 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Network database interface source files
NET_CSRCS += netdb_gethostname.c netdb_sethostname.c netdb_globals.c
# Include database device interface build support
DEPPATH += --dep-path netdb
VPATH += :netdb

76
net/netdb/netdb.h
View File

@ -1,76 +0,0 @@
/****************************************************************************
* net/netdb/netdb.h
*
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef _NET_NETDB_NETDB_H
#define _NET_NETDB_NETDB_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <unistd.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* This is the system hostname */
EXTERN char g_hostname[HOST_NAME_MAX + 1];
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* _NET_NETDB_NETDB_H */

98
net/netdb/netdb_gethostname.c
View File

@ -1,98 +0,0 @@
/****************************************************************************
* net/netdb/netdb_gethostname.c
*
* Copyright (C) 2015 Stavros Polymenis. All rights reserved.
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Stavros Polymenis <sp@orbitalfox.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <unistd.h>
#include <unistd.h>
#include <nuttx/net/netdb.h>
#include <arch/irq.h>
#include "netdb/netdb.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netdb_gethostname
*
* Description:
* The netdb_gethostname() function will return the standard host name for
* the current machine. The namelen argument will specify the size of the
* array pointed to by the name argument. The returned name will be null-
* terminated, except that if namelen is an insufficient length to hold the
* host name, then the returned name will be truncated and it is
* unspecified whether the returned name is null-terminated.
*
* Host names are limited to {HOST_NAME_MAX} bytes.
*
* Input Parameters:
* name - The user-provided buffer to receive the host name.
* namelen - The size of the user provided buffer in bytes.
*
* Returned Value:
* Upon successful completion, 0 will be returned; otherwise, -1 will be
* returned. No errors are defined; errno variable is not set.
*
****************************************************************************/
int netdb_gethostname(FAR char *name, size_t namelen)
{
irqstate_t flags;
/* Return the host name, truncating to fit into the user provided buffer.
* The hostname is global resource. There is a microscopic possibility
* that it could change while we are copying it.
*/
flags = irqsave();
strncpy(name, g_hostname, namelen);
irqrestore(flags);
return 0;
}

68
net/netdb/netdb_globals.c
View File

@ -1,68 +0,0 @@
/****************************************************************************
* net/netdb/netdb_globals.c
*
* Copyright (C) 2015 Stavros Polymenis. All rights reserved.
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Stavros Polymenis <sp@orbitalfox.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include "netdb/netdb.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* The default host name is a system configuration setting. This may be
* changed via sethostname(), however.
*/
#ifndef CONFIG_NET_HOSTNAME
# define CONFIG_NET_HOSTNAME ""
#endif
/****************************************************************************
* Public Data
****************************************************************************/
/* This is the system hostname */
char g_hostname[HOST_NAME_MAX + 1] = CONFIG_NET_HOSTNAME;
/****************************************************************************
* Public Functions
****************************************************************************/

103
net/netdb/netdb_sethostname.c
View File

@ -1,103 +0,0 @@
/****************************************************************************
* net/netdb/netdb_sethostname.c
*
* Copyright (C) 2015 Stavros Polymenis. All rights reserved.
* Copyright (C) 2015 Gregory Nutt. All rights reserved.
* Author: Stavros Polymenis <sp@orbitalfox.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include <unistd.h>
#include <nuttx/net/netdb.h>
#include <arch/irq.h>
#include "netdb/netdb.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netdb_sethostname
*
* Description:
*
* netdb_sethostname() sets the hostname to the value given in the
* character array name. The len argument specifies the number of bytes in
* name. (Thus, name does not require a terminating null byte.)
*
* Input Parameters:
* name - The user buffer to providing the new host name.
* namelen - The size of the user buffer in bytes.
*
* Returned Value:
* Upon successful completion, 0 will be returned; otherwise, -1 will be
* returned. No errors are defined; errno variable is not set.
*
****************************************************************************/
int netdb_sethostname(FAR const char *name, size_t size)
{
irqstate_t flags;
/* Save the new host name, truncating to HOST_NAME_MAX if necessary. This
* internal copy is always NUL terminated. The hostname is global resource.
* There is a microscopic possibility that it could be accessed while we
* are setting it.
*/
flags = irqsave();
strncpy(g_hostname, name, MIN(HOST_NAME_MAX, size));
g_hostname[HOST_NAME_MAX] = '\0';
irqrestore(flags);
return 0;
}