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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2020, 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.haxx.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:  ***************************************************************************/
   22: #include "tool_setup.h"
   23: 
   24: #include <sys/stat.h>
   25: 
   26: #ifdef WIN32
   27: #  include <direct.h>
   28: #endif
   29: 
   30: #define ENABLE_CURLX_PRINTF
   31: /* use our own printf() functions */
   32: #include "curlx.h"
   33: 
   34: #include "tool_dirhie.h"
   35: 
   36: #include "memdebug.h" /* keep this as LAST include */
   37: 
   38: #ifdef NETWARE
   39: #  ifndef __NOVELL_LIBC__
   40: #    define mkdir mkdir_510
   41: #  endif
   42: #endif
   43: 
   44: #if defined(WIN32) || (defined(MSDOS) && !defined(__DJGPP__))
   45: #  define mkdir(x,y) (mkdir)((x))
   46: #  ifndef F_OK
   47: #    define F_OK 0
   48: #  endif
   49: #endif
   50: 
   51: static void show_dir_errno(FILE *errors, const char *name)
   52: {
   53:   switch(errno) {
   54: #ifdef EACCES
   55:   case EACCES:
   56:     fprintf(errors, "You don't have permission to create %s.\n", name);
   57:     break;
   58: #endif
   59: #ifdef ENAMETOOLONG
   60:   case ENAMETOOLONG:
   61:     fprintf(errors, "The directory name %s is too long.\n", name);
   62:     break;
   63: #endif
   64: #ifdef EROFS
   65:   case EROFS:
   66:     fprintf(errors, "%s resides on a read-only file system.\n", name);
   67:     break;
   68: #endif
   69: #ifdef ENOSPC
   70:   case ENOSPC:
   71:     fprintf(errors, "No space left on the file system that will "
   72:             "contain the directory %s.\n", name);
   73:     break;
   74: #endif
   75: #ifdef EDQUOT
   76:   case EDQUOT:
   77:     fprintf(errors, "Cannot create directory %s because you "
   78:             "exceeded your quota.\n", name);
   79:     break;
   80: #endif
   81:   default :
   82:     fprintf(errors, "Error creating directory %s.\n", name);
   83:     break;
   84:   }
   85: }
   86: 
   87: /*
   88:  * Create the needed directory hierarchy recursively in order to save
   89:  *  multi-GETs in file output, ie:
   90:  *  curl "http://my.site/dir[1-5]/file[1-5].txt" -o "dir#1/file#2.txt"
   91:  *  should create all the dir* automagically
   92:  */
   93: 
   94: #if defined(WIN32) || defined(__DJGPP__)
   95: /* systems that may use either or when specifying a path */
   96: #define PATH_DELIMITERS "\\/"
   97: #else
   98: #define PATH_DELIMITERS DIR_CHAR
   99: #endif
  100: 
  101: 
  102: CURLcode create_dir_hierarchy(const char *outfile, FILE *errors)
  103: {
  104:   char *tempdir;
  105:   char *tempdir2;
  106:   char *outdup;
  107:   char *dirbuildup;
  108:   CURLcode result = CURLE_OK;
  109:   size_t outlen;
  110: 
  111:   outlen = strlen(outfile);
  112:   outdup = strdup(outfile);
  113:   if(!outdup)
  114:     return CURLE_OUT_OF_MEMORY;
  115: 
  116:   dirbuildup = malloc(outlen + 1);
  117:   if(!dirbuildup) {
  118:     Curl_safefree(outdup);
  119:     return CURLE_OUT_OF_MEMORY;
  120:   }
  121:   dirbuildup[0] = '\0';
  122: 
  123:   /* Allow strtok() here since this isn't used threaded */
  124:   /* !checksrc! disable BANNEDFUNC 2 */
  125:   tempdir = strtok(outdup, PATH_DELIMITERS);
  126: 
  127:   while(tempdir != NULL) {
  128:     bool skip = false;
  129:     tempdir2 = strtok(NULL, PATH_DELIMITERS);
  130:     /* since strtok returns a token for the last word even
  131:        if not ending with DIR_CHAR, we need to prune it */
  132:     if(tempdir2 != NULL) {
  133:       size_t dlen = strlen(dirbuildup);
  134:       if(dlen)
  135:         msnprintf(&dirbuildup[dlen], outlen - dlen, "%s%s", DIR_CHAR, tempdir);
  136:       else {
  137:         if(outdup == tempdir) {
  138: #if defined(MSDOS) || defined(WIN32)
  139:           /* Skip creating a drive's current directory.
  140:              It may seem as though that would harmlessly fail but it could be
  141:              a corner case if X: did not exist, since we would be creating it
  142:              erroneously.
  143:              eg if outfile is X:\foo\bar\filename then don't mkdir X:
  144:              This logic takes into account unsupported drives !:, 1:, etc. */
  145:           char *p = strchr(tempdir, ':');
  146:           if(p && !p[1])
  147:             skip = true;
  148: #endif
  149:           /* the output string doesn't start with a separator */
  150:           strcpy(dirbuildup, tempdir);
  151:         }
  152:         else
  153:           msnprintf(dirbuildup, outlen, "%s%s", DIR_CHAR, tempdir);
  154:       }
  155:       /* Create directory. Ignore access denied error to allow traversal. */
  156:       if(!skip && (-1 == mkdir(dirbuildup, (mode_t)0000750)) &&
  157:          (errno != EACCES) && (errno != EEXIST)) {
  158:         show_dir_errno(errors, dirbuildup);
  159:         result = CURLE_WRITE_ERROR;
  160:         break; /* get out of loop */
  161:       }
  162:     }
  163:     tempdir = tempdir2;
  164:   }
  165: 
  166:   Curl_safefree(dirbuildup);
  167:   Curl_safefree(outdup);
  168: 
  169:   return result;
  170: }