linux中实现“mkdir -p”功能的c函数

   1: int make_dirs(char *new_path, int perms)

   2: {

   3:     char *saved_path, *cp;

   4:     int saved_ch;

   5:     struct stat st;

   6:     int rc;

7:

   8:     cp = saved_path = strdup(new_path);

   9:     while (*cp && *cp == '/') ++cp;

10:

  11:     while (1) {

  12:         while (*cp && *cp != '/') ++cp;

  13:         if ((saved_ch = *cp) != 0)

  14:             *cp = 0;

15:

  16:         if ((rc = stat(saved_path, &st)) >= 0) {

  17:             if (!S_ISDIR(st.st_mode)) {

  18:                 errno = ENOTDIR;

  19:                 rc = -1;

  20:                 break;

  21:             }

  22:         }

  23:         else {

  24:             if (errno != ENOENT ) {

  25:                break;

  26:             }

27:

  28:             if ((rc = mkdir(saved_path, perms)) < 0 ) {

  29:                 if (errno != EEXIST)

  30:                     break;

31:

  32:                 if ((rc = stat(saved_path, &st)) < 0)

  33:                     break;

34:

  35:                 if (!S_ISDIR(st.st_mode)) {

  36:                     errno = ENOTDIR;

  37:                     rc = -1;

  38:                     break;

  39:                 }

  40:             }

  41:         }

42:

  43:         if (saved_ch != 0)

  44:             *cp = saved_ch;

45:

  46:         while (*cp && *cp == '/') ++cp;

  47:         if (*cp == 0)

  48:             break;

  49:     }

50:

  51:     free(saved_path);

  52:     return rc;

  53: }

posted on 2011-05-31 21:36 narcasse 阅读(1364) 评论(0) 收藏举报

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