1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 #include "tool_setup.h"
25
26 #include <sys/stat.h>
27
28 #ifdef _WIN32
29 # include <direct.h>
30 #endif
31
32 #include "curlx.h"
33
34 #include "tool_dirhie.h"
35 #include "tool_msgs.h"
36
37 #include "memdebug.h" /* keep this as LAST include */
38
39 #if defined(_WIN32) || (defined(MSDOS) && !defined(__DJGPP__))
40 # define mkdir(x,y) (mkdir)((x))
41 # ifndef F_OK
42 # define F_OK 0
43 # endif
44 #endif
45
show_dir_errno(struct GlobalConfig * global,const char * name)46 static void show_dir_errno(struct GlobalConfig *global, const char *name)
47 {
48 switch(errno) {
49 #ifdef EACCES
50 case EACCES:
51 errorf(global, "You do not have permission to create %s", name);
52 break;
53 #endif
54 #ifdef ENAMETOOLONG
55 case ENAMETOOLONG:
56 errorf(global, "The directory name %s is too long", name);
57 break;
58 #endif
59 #ifdef EROFS
60 case EROFS:
61 errorf(global, "%s resides on a read-only file system", name);
62 break;
63 #endif
64 #ifdef ENOSPC
65 case ENOSPC:
66 errorf(global, "No space left on the file system that will "
67 "contain the directory %s", name);
68 break;
69 #endif
70 #ifdef EDQUOT
71 case EDQUOT:
72 errorf(global, "Cannot create directory %s because you "
73 "exceeded your quota", name);
74 break;
75 #endif
76 default:
77 errorf(global, "Error creating directory %s", name);
78 break;
79 }
80 }
81
82 /*
83 * Create the needed directory hierarchy recursively in order to save
84 * multi-GETs in file output, ie:
85 * curl "http://example.org/dir[1-5]/file[1-5].txt" -o "dir#1/file#2.txt"
86 * should create all the dir* automagically
87 */
88
89 #if defined(_WIN32) || defined(__DJGPP__)
90 /* systems that may use either or when specifying a path */
91 #define PATH_DELIMITERS "\\/"
92 #else
93 #define PATH_DELIMITERS DIR_CHAR
94 #endif
95
96
create_dir_hierarchy(const char * outfile,struct GlobalConfig * global)97 CURLcode create_dir_hierarchy(const char *outfile, struct GlobalConfig *global)
98 {
99 char *tempdir;
100 char *tempdir2;
101 char *outdup;
102 char *dirbuildup;
103 CURLcode result = CURLE_OK;
104 size_t outlen;
105
106 outlen = strlen(outfile);
107 outdup = strdup(outfile);
108 if(!outdup)
109 return CURLE_OUT_OF_MEMORY;
110
111 dirbuildup = malloc(outlen + 1);
112 if(!dirbuildup) {
113 Curl_safefree(outdup);
114 return CURLE_OUT_OF_MEMORY;
115 }
116 dirbuildup[0] = '\0';
117
118 /* Allow strtok() here since this is not used threaded */
119 /* !checksrc! disable BANNEDFUNC 2 */
120 tempdir = strtok(outdup, PATH_DELIMITERS);
121
122 while(tempdir) {
123 bool skip = false;
124 tempdir2 = strtok(NULL, PATH_DELIMITERS);
125 /* since strtok returns a token for the last word even
126 if not ending with DIR_CHAR, we need to prune it */
127 if(tempdir2) {
128 size_t dlen = strlen(dirbuildup);
129 if(dlen)
130 msnprintf(&dirbuildup[dlen], outlen - dlen, "%s%s", DIR_CHAR, tempdir);
131 else {
132 if(outdup == tempdir) {
133 #if defined(_WIN32) || defined(MSDOS)
134 /* Skip creating a drive's current directory.
135 It may seem as though that would harmlessly fail but it could be
136 a corner case if X: did not exist, since we would be creating it
137 erroneously.
138 eg if outfile is X:\foo\bar\filename then do not mkdir X:
139 This logic takes into account unsupported drives !:, 1:, etc. */
140 char *p = strchr(tempdir, ':');
141 if(p && !p[1])
142 skip = true;
143 #endif
144 /* the output string does not start with a separator */
145 strcpy(dirbuildup, tempdir);
146 }
147 else
148 msnprintf(dirbuildup, outlen, "%s%s", DIR_CHAR, tempdir);
149 }
150 /* Create directory. Ignore access denied error to allow traversal. */
151 if(!skip && (-1 == mkdir(dirbuildup, (mode_t)0000750)) &&
152 (errno != EACCES) && (errno != EEXIST)) {
153 show_dir_errno(global, dirbuildup);
154 result = CURLE_WRITE_ERROR;
155 break; /* get out of loop */
156 }
157 }
158 tempdir = tempdir2;
159 }
160
161 Curl_safefree(dirbuildup);
162 Curl_safefree(outdup);
163
164 return result;
165 }
166
