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 #define ENABLE_CURLX_PRINTF
33 /* use our own printf() functions */
34 #include "curlx.h"
35
36 #include "tool_dirhie.h"
37 #include "tool_msgs.h"
38
39 #include "memdebug.h" /* keep this as LAST include */
40
41 #if defined(_WIN32) || (defined(MSDOS) && !defined(__DJGPP__))
42 # define mkdir(x,y) (mkdir)((x))
43 # ifndef F_OK
44 # define F_OK 0
45 # endif
46 #endif
47
show_dir_errno(struct GlobalConfig * global,const char * name)48 static void show_dir_errno(struct GlobalConfig *global, const char *name)
49 {
50 switch(errno) {
51 #ifdef EACCES
52 case EACCES:
53 errorf(global, "You don't have permission to create %s", name);
54 break;
55 #endif
56 #ifdef ENAMETOOLONG
57 case ENAMETOOLONG:
58 errorf(global, "The directory name %s is too long", name);
59 break;
60 #endif
61 #ifdef EROFS
62 case EROFS:
63 errorf(global, "%s resides on a read-only file system", name);
64 break;
65 #endif
66 #ifdef ENOSPC
67 case ENOSPC:
68 errorf(global, "No space left on the file system that will "
69 "contain the directory %s", name);
70 break;
71 #endif
72 #ifdef EDQUOT
73 case EDQUOT:
74 errorf(global, "Cannot create directory %s because you "
75 "exceeded your quota", name);
76 break;
77 #endif
78 default:
79 errorf(global, "Error creating directory %s", name);
80 break;
81 }
82 }
83
84 /*
85 * Create the needed directory hierarchy recursively in order to save
86 * multi-GETs in file output, ie:
87 * curl "http://example.org/dir[1-5]/file[1-5].txt" -o "dir#1/file#2.txt"
88 * should create all the dir* automagically
89 */
90
91 #if defined(_WIN32) || defined(__DJGPP__)
92 /* systems that may use either or when specifying a path */
93 #define PATH_DELIMITERS "\\/"
94 #else
95 #define PATH_DELIMITERS DIR_CHAR
96 #endif
97
98
create_dir_hierarchy(const char * outfile,struct GlobalConfig * global)99 CURLcode create_dir_hierarchy(const char *outfile, struct GlobalConfig *global)
100 {
101 char *tempdir;
102 char *tempdir2;
103 char *outdup;
104 char *dirbuildup;
105 CURLcode result = CURLE_OK;
106 size_t outlen;
107
108 outlen = strlen(outfile);
109 outdup = strdup(outfile);
110 if(!outdup)
111 return CURLE_OUT_OF_MEMORY;
112
113 dirbuildup = malloc(outlen + 1);
114 if(!dirbuildup) {
115 Curl_safefree(outdup);
116 return CURLE_OUT_OF_MEMORY;
117 }
118 dirbuildup[0] = '\0';
119
120 /* Allow strtok() here since this isn't used threaded */
121 /* !checksrc! disable BANNEDFUNC 2 */
122 tempdir = strtok(outdup, PATH_DELIMITERS);
123
124 while(tempdir) {
125 bool skip = false;
126 tempdir2 = strtok(NULL, PATH_DELIMITERS);
127 /* since strtok returns a token for the last word even
128 if not ending with DIR_CHAR, we need to prune it */
129 if(tempdir2) {
130 size_t dlen = strlen(dirbuildup);
131 if(dlen)
132 msnprintf(&dirbuildup[dlen], outlen - dlen, "%s%s", DIR_CHAR, tempdir);
133 else {
134 if(outdup == tempdir) {
135 #if defined(_WIN32) || defined(MSDOS)
136 /* Skip creating a drive's current directory.
137 It may seem as though that would harmlessly fail but it could be
138 a corner case if X: did not exist, since we would be creating it
139 erroneously.
140 eg if outfile is X:\foo\bar\filename then don't mkdir X:
141 This logic takes into account unsupported drives !:, 1:, etc. */
142 char *p = strchr(tempdir, ':');
143 if(p && !p[1])
144 skip = true;
145 #endif
146 /* the output string doesn't start with a separator */
147 strcpy(dirbuildup, tempdir);
148 }
149 else
150 msnprintf(dirbuildup, outlen, "%s%s", DIR_CHAR, tempdir);
151 }
152 /* Create directory. Ignore access denied error to allow traversal. */
153 if(!skip && (-1 == mkdir(dirbuildup, (mode_t)0000750)) &&
154 (errno != EACCES) && (errno != EEXIST)) {
155 show_dir_errno(global, dirbuildup);
156 result = CURLE_WRITE_ERROR;
157 break; /* get out of loop */
158 }
159 }
160 tempdir = tempdir2;
161 }
162
163 Curl_safefree(dirbuildup);
164 Curl_safefree(outdup);
165
166 return result;
167 }
168
