1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2022 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <unistd.h>
36 #include <fcntl.h>
37 #include <sys/statfs.h>
38 #include <errno.h>
39
40 #include "los_config.h"
41
42 #if defined(LOSCFG_SHELL_CMD_DEBUG) && defined(LOSCFG_FS_PROC)
43 #include "los_typedef.h"
44 #include "shell.h"
45 #include "shcmd.h"
46 #include "proc_file.h"
47 #include "dirent.h"
48 #include "proc_fs.h"
49
50 #define WRITEPROC_ARGC 3
51
OsShellCmdWriteProc(int argc,char ** argv)52 int OsShellCmdWriteProc(int argc, char **argv)
53 {
54 int i;
55 int ret;
56 const char *path = NULL;
57 const char *value = NULL;
58 unsigned int len;
59 struct ProcDirEntry *handle = NULL;
60 char realPath[PATH_MAX] = {'\0'};
61 const char *rootProcDir = "/proc/";
62
63 if (argc == WRITEPROC_ARGC) {
64 value = argv[0];
65 path = argv[2]; // 2: index of path
66 len = strlen(value) + 1; /* + 1:add the \0 */
67 if (strncmp(argv[1], ">>", strlen(">>")) == 0) {
68 if ((realpath(path, realPath) == NULL) || (strncmp(realPath, rootProcDir, strlen(rootProcDir)) != 0)) {
69 PRINT_ERR("No such file or directory\n");
70 return PROC_ERROR;
71 }
72
73 handle = OpenProcFile(realPath, O_TRUNC);
74 if (handle == NULL) {
75 PRINT_ERR("No such file or directory\n");
76 return PROC_ERROR;
77 }
78
79 ret = WriteProcFile(handle, value, len);
80 if (ret < 0) {
81 (void)CloseProcFile(handle);
82 PRINT_ERR("write error\n");
83 return PROC_ERROR;
84 }
85 for (i = 0; i < argc; i++) {
86 PRINTK("%s%s", i > 0 ? " " : "", argv[i]);
87 }
88 PRINTK("\n");
89 (void)CloseProcFile(handle);
90 return LOS_OK;
91 }
92 }
93 PRINT_ERR("writeproc [data] [>>] [path]\n");
94 return PROC_ERROR;
95 }
96
97 SHELLCMD_ENTRY(writeproc_shellcmd, CMD_TYPE_EX, "writeproc", XARGS, (CmdCallBackFunc)OsShellCmdWriteProc);
98 #endif
99