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Annotation of embedaddon/curl/src/tool_dirhie.c, revision 1.1

1.1     ! misho       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: }