quickjs-tart

quickjs-based runtime for wallet-core logic
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tool_dirhie.c (4315B)

      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 #if defined(_WIN32) && !defined(UNDER_CE)
     27 #  include <direct.h>
     28 #endif
     29 
     30 #include "tool_dirhie.h"
     31 #include "tool_msgs.h"
     32 
     33 #include "memdebug.h" /* keep this as LAST include */
     34 
     35 #if defined(_WIN32) || (defined(MSDOS) && !defined(__DJGPP__))
     36 #  define mkdir(x,y) (mkdir)((x))
     37 #  ifndef F_OK
     38 #    define F_OK 0
     39 #  endif
     40 #endif
     41 
     42 static void show_dir_errno(struct GlobalConfig *global, const char *name)
     43 {
     44   switch(errno) {
     45 #ifdef EACCES
     46   /* !checksrc! disable ERRNOVAR 1 */
     47   case EACCES:
     48     errorf(global, "You do not have permission to create %s", name);
     49     break;
     50 #endif
     51 #ifdef ENAMETOOLONG
     52   case ENAMETOOLONG:
     53     errorf(global, "The directory name %s is too long", name);
     54     break;
     55 #endif
     56 #ifdef EROFS
     57   case EROFS:
     58     errorf(global, "%s resides on a read-only file system", name);
     59     break;
     60 #endif
     61 #ifdef ENOSPC
     62   case ENOSPC:
     63     errorf(global, "No space left on the file system that will "
     64            "contain the directory %s", name);
     65     break;
     66 #endif
     67 #ifdef EDQUOT
     68   case EDQUOT:
     69     errorf(global, "Cannot create directory %s because you "
     70            "exceeded your quota", name);
     71     break;
     72 #endif
     73   default:
     74     errorf(global, "Error creating directory %s", name);
     75     break;
     76   }
     77 }
     78 
     79 /*
     80  * Create the needed directory hierarchy recursively in order to save
     81  *  multi-GETs in file output, ie:
     82  *  curl "http://example.org/dir[1-5]/file[1-5].txt" -o "dir#1/file#2.txt"
     83  *  should create all the dir* automagically
     84  */
     85 
     86 #if defined(_WIN32) || defined(__DJGPP__)
     87 /* systems that may use either or when specifying a path */
     88 #define PATH_DELIMITERS "\\/"
     89 #else
     90 #define PATH_DELIMITERS DIR_CHAR
     91 #endif
     92 
     93 CURLcode create_dir_hierarchy(const char *outfile, struct GlobalConfig *global)
     94 {
     95   CURLcode result = CURLE_OK;
     96   size_t outlen = strlen(outfile);
     97   struct dynbuf dirbuf;
     98 
     99   curlx_dyn_init(&dirbuf, outlen + 1);
    100 
    101   while(*outfile) {
    102     bool skip = FALSE;
    103     size_t seplen = strspn(outfile, PATH_DELIMITERS);
    104     size_t len = strcspn(&outfile[seplen], PATH_DELIMITERS);
    105 
    106     /* the last path component is the file and it ends with a null byte */
    107     if(!outfile[len + seplen])
    108       break;
    109 
    110 #if defined(_WIN32) || defined(MSDOS)
    111     if(!curlx_dyn_len(&dirbuf)) {
    112       /* Skip creating a drive's current directory. It may seem as though that
    113          would harmlessly fail but it could be a corner case if X: did not
    114          exist, since we would be creating it erroneously. eg if outfile is
    115          X:\foo\bar\filename then do not mkdir X: This logic takes into
    116          account unsupported drives !:, 1:, etc. */
    117       if(len > 1 && (outfile[1]==':'))
    118         skip = TRUE;
    119     }
    120 #endif
    121     /* insert the leading separators (possibly plural) plus the following
    122        directory name */
    123     result = curlx_dyn_addn(&dirbuf, outfile, seplen + len);
    124     if(result)
    125       return result;
    126 
    127     /* Create directory. Ignore access denied error to allow traversal. */
    128     /* !checksrc! disable ERRNOVAR 1 */
    129     if(!skip && (-1 == mkdir(curlx_dyn_ptr(&dirbuf), (mode_t)0000750)) &&
    130        (errno != EACCES) && (errno != EEXIST)) {
    131       show_dir_errno(global, curlx_dyn_ptr(&dirbuf));
    132       result = CURLE_WRITE_ERROR;
    133       break; /* get out of loop */
    134     }
    135     outfile += len + seplen;
    136   }
    137 
    138   curlx_dyn_free(&dirbuf);
    139 
    140   return result;
    141 }