FD.io VPP  v18.07.1-19-g511ce25
Vector Packet Processing
util.c
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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  && (!strncmp (e->d_name, ".", 1) ||
77  !strncmp (e->d_name, "..", 2)))
78  continue;
79  }
80  else
81  {
82  if (e->d_type == DT_DIR)
83  continue;
84  }
85 
86  s = format (s, "%s/%s", dir_name, e->d_name);
87  t = format (t, "%s", e->d_name);
88  error = f (arg, s, t);
89  _vec_len (s) = 0;
90  _vec_len (t) = 0;
91 
92  if (error)
93  break;
94  }
95 
96  vec_free (s);
97  closedir (d);
98 
99  return error;
100 }
101 
102 clib_error_t *
104 {
105  clib_error_t *error = 0;
106  char *c = 0;
107  int i = 0;
108 
109  while (path[i] != 0)
110  {
111  if (c && path[i] == '/')
112  {
113  vec_add1 (c, 0);
114  if ((mkdir (c, 0755)) && (errno != EEXIST))
115  {
116  error = clib_error_return_unix (0, "mkdir '%s'", c);
117  goto done;
118  }
119  _vec_len (c)--;
120  }
121  vec_add1 (c, path[i]);
122  i++;
123  }
124 
125  if ((mkdir (path, 0755)) && (errno != EEXIST))
126  {
127  error = clib_error_return_unix (0, "mkdir '%s'", path);
128  goto done;
129  }
130 
131 done:
132  vec_free (c);
133 
134  return error;
135 }
136 
137 clib_error_t *
139  const char *path, u8 ** full_path)
140 {
141  u8 *fp = 0;
142  char *last_slash = 0;
143 
144  if (path[0] == '\0')
145  {
146  return clib_error_return (0, "path is an empty string");
147  }
148  else if (strncmp (path, "../", 3) == 0 || strstr (path, "/../"))
149  {
150  return clib_error_return (0, "'..' not allowed in runtime path");
151  }
152  else if (path[0] == '/')
153  {
154  /* Absolute path. Has to start with runtime directory */
155  if (strncmp ((char *) um->runtime_dir, path,
156  strlen ((char *) um->runtime_dir)))
157  {
158  return clib_error_return (0,
159  "file %s is not in runtime directory %s",
160  path, um->runtime_dir);
161  }
162  fp = format (0, "%s%c", path, '\0');
163  }
164  else
165  {
166  /* Relative path, just append to runtime */
167  fp = format (0, "%s/%s%c", um->runtime_dir, path, '\0');
168  }
169 
170  /* We don't want to create a directory out of the last file */
171  if ((last_slash = strrchr ((char *) fp, '/')) != NULL)
172  *last_slash = '\0';
173 
174  clib_error_t *error = vlib_unix_recursive_mkdir ((char *) fp);
175 
176  if (last_slash != NULL)
177  *last_slash = '/';
178 
179  if (error)
180  vec_free (fp);
181 
182  *full_path = fp;
183  return error;
184 }
185 
186 /*
187  * fd.io coding-style-patch-verification: ON
188  *
189  * Local Variables:
190  * eval: (c-set-style "gnu")
191  * End:
192  */
clib_error_t * vlib_unix_validate_runtime_file(unix_main_t *um, const char *path, u8 **full_path)
Definition: util.c:138
clib_error_t * vlib_unix_recursive_mkdir(char *path)
Definition: util.c:103
#define NULL
Definition: clib.h:55
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
int i
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unsigned char u8
Definition: types.h:56
#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:339
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