kernel_liteos_a/syscall/misc_syscall.c

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/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
* 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 of the copyright holder 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 HOLDER 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.
*/
#include "errno.h"
#include "los_process_pri.h"
#ifdef LOSCFG_SHELL
#include "shcmd.h"
#include "shmsg.h"
#endif
#include "sys/utsname.h"
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#include "sys/reboot.h"
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#include "user_copy.h"
#include "los_strncpy_from_user.h"
#include "capability_type.h"
#include "capability_api.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
int SysUname(struct utsname *name)
{
int ret;
struct utsname tmpName;
ret = LOS_ArchCopyFromUser(&tmpName, name, sizeof(struct utsname));
if (ret != 0) {
return -EFAULT;
}
ret = uname(&tmpName);
if (ret < 0) {
return ret;
}
ret = LOS_ArchCopyToUser(name, &tmpName, sizeof(struct utsname));
if (ret != 0) {
return -EFAULT;
}
return ret;
}
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int SysReboot(int magic, int magic2, int type)
{
(void)magic;
(void)magic2;
if (!IsCapPermit(CAP_REBOOT)) {
return -EPERM;
}
SystemRebootFunc rebootHook = OsGetRebootHook();
if ((type == RB_AUTOBOOT) && (rebootHook != NULL)) {
rebootHook();
return 0;
}
return -EFAULT;
}
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#ifdef LOSCFG_SHELL
int SysShellExec(const char *msgName, const char *cmdString)
{
int ret;
unsigned int uintRet;
errno_t err;
CmdParsed cmdParsed;
char msgNameDup[CMD_KEY_LEN + 1] = { 0 };
char cmdStringDup[CMD_MAX_LEN + 1] = { 0 };
if (!IsCapPermit(CAP_SHELL_EXEC)) {
return -EPERM;
}
ret = LOS_StrncpyFromUser(msgNameDup, msgName, CMD_KEY_LEN + 1);
if (ret < 0) {
return -EFAULT;
} else if (ret > CMD_KEY_LEN) {
return -ENAMETOOLONG;
}
ret = LOS_StrncpyFromUser(cmdStringDup, cmdString, CMD_MAX_LEN + 1);
if (ret < 0) {
return -EFAULT;
} else if (ret > CMD_MAX_LEN) {
return -ENAMETOOLONG;
}
err = memset_s(&cmdParsed, sizeof(CmdParsed), 0, sizeof(CmdParsed));
if (err != EOK) {
return -EFAULT;
}
uintRet = ShellMsgTypeGet(&cmdParsed, msgNameDup);
if (uintRet != LOS_OK) {
PRINTK("%s:command not found\n", msgNameDup);
return -EFAULT;
} else {
(void)OsCmdExec(&cmdParsed, (char *)cmdStringDup);
}
return 0;
}
#endif
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */