FD.io VPP  v17.10-9-gd594711
Vector Packet Processing
util.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /*
16  * pci.c: Linux user space PCI bus management.
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
20  * Permission is hereby granted, free of charge, to any person obtaining
21  * a copy of this software and associated documentation files (the
22  * "Software"), to deal in the Software without restriction, including
23  * without limitation the rights to use, copy, modify, merge, publish,
24  * distribute, sublicense, and/or sell copies of the Software, and to
25  * permit persons to whom the Software is furnished to do so, subject to
26  * the following conditions:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
31  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38  */
39 
40 #include <vlib/vlib.h>
41 #include <vlib/unix/unix.h>
42 
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <fcntl.h>
46 #include <dirent.h>
47 
49 foreach_directory_file (char *dir_name,
50  clib_error_t * (*f) (void *arg, u8 * path_name,
51  u8 * file_name), void *arg,
52  int scan_dirs)
53 {
54  DIR *d;
55  struct dirent *e;
56  clib_error_t *error = 0;
57  u8 *s, *t;
58 
59  d = opendir (dir_name);
60  if (!d)
61  {
62  if (errno == ENOENT)
63  return 0;
64  return clib_error_return_unix (0, "open `%s'", dir_name);
65  }
66 
67  s = t = 0;
68  while (1)
69  {
70  e = readdir (d);
71  if (!e)
72  break;
73  if (scan_dirs)
74  {
75  if (e->d_type == DT_DIR
76  && (!strcmp (e->d_name, ".") || !strcmp (e->d_name, "..")))
77  continue;
78  }
79  else
80  {
81  if (e->d_type == DT_DIR)
82  continue;
83  }
84 
85  s = format (s, "%s/%s", dir_name, e->d_name);
86  t = format (t, "%s", e->d_name);
87  error = f (arg, s, t);
88  _vec_len (s) = 0;
89  _vec_len (t) = 0;
90 
91  if (error)
92  break;
93  }
94 
95  vec_free (s);
96  closedir (d);
97 
98  return error;
99 }
100 
101 clib_error_t *
103 {
104  clib_error_t *error = 0;
105  char *c = 0;
106  int i = 0;
107 
108  while (path[i] != 0)
109  {
110  if (c && path[i] == '/')
111  {
112  vec_add1 (c, 0);
113  if ((mkdir (c, 0755)) && (errno != EEXIST))
114  {
115  error = clib_error_return_unix (0, "mkdir '%s'", c);
116  goto done;
117  }
118  _vec_len (c)--;
119  }
120  vec_add1 (c, path[i]);
121  i++;
122  }
123 
124  if ((mkdir (path, 0755)) && (errno != EEXIST))
125  {
126  error = clib_error_return_unix (0, "mkdir '%s'", path);
127  goto done;
128  }
129 
130 done:
131  vec_free (c);
132 
133  return error;
134 }
135 
136 clib_error_t *
138  const char *path, u8 ** full_path)
139 {
140  u8 *fp = 0;
141  char *last_slash = 0;
142 
143  if (path[0] == '\0')
144  {
145  return clib_error_return (0, "path is an empty string");
146  }
147  else if (strncmp (path, "../", 3) == 0 || strstr (path, "/../"))
148  {
149  return clib_error_return (0, "'..' not allowed in runtime path");
150  }
151  else if (path[0] == '/')
152  {
153  /* Absolute path. Has to start with runtime directory */
154  if (strncmp ((char *) um->runtime_dir, path,
155  strlen ((char *) um->runtime_dir)))
156  {
157  return clib_error_return (0,
158  "file %s is not in runtime directory %s",
159  path, um->runtime_dir);
160  }
161  fp = format (0, "%s%c", path, '\0');
162  }
163  else
164  {
165  /* Relative path, just append to runtime */
166  fp = format (0, "%s/%s%c", um->runtime_dir, path, '\0');
167  }
168 
169  /* We don't want to create a directory out of the last file */
170  if ((last_slash = strrchr ((char *) fp, '/')) != NULL)
171  *last_slash = '\0';
172 
173  clib_error_t *error = vlib_unix_recursive_mkdir ((char *) fp);
174 
175  if (last_slash != NULL)
176  *last_slash = '/';
177 
178  if (error)
179  vec_free (fp);
180 
181  *full_path = fp;
182  return error;
183 }
184 
185 /*
186  * fd.io coding-style-patch-verification: ON
187  *
188  * Local Variables:
189  * eval: (c-set-style "gnu")
190  * End:
191  */
clib_error_t * vlib_unix_validate_runtime_file(unix_main_t *um, const char *path, u8 **full_path)
Definition: util.c:137
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:337
clib_error_t * vlib_unix_recursive_mkdir(char *path)
Definition: util.c:102
#define NULL
Definition: clib.h:55
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:518
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
#define clib_error_return(e, args...)
Definition: error.h:99
#define clib_error_return_unix(e, args...)
Definition: error.h:102
svmdb_client_t * c
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:336
unsigned char u8
Definition: types.h:56
u8 * runtime_dir
Definition: unix.h:75
clib_error_t * foreach_directory_file(char *dir_name, clib_error_t *(*f)(void *arg, u8 *path_name, u8 *file_name), void *arg, int scan_dirs)
Definition: util.c:49