• FATFS 初学之 f_rename


     1 /*-----------------------------------------------------------------------*/
     2 /* Rename File/Directory                                                 */
     3 /*-----------------------------------------------------------------------*/
     4 
     5 FRESULT f_rename (
     6     const TCHAR *path_old,    /* Pointer to the old name */
     7     const TCHAR *path_new    /* Pointer to the new name */
     8 )
     9 {
    10     FRESULT res;
    11     DIR djo, djn;
    12     BYTE buf[21], *dir;
    13     DWORD dw;
    14     DEF_NAMEBUF;
    15 
    16 
    17     res = chk_mounted(&path_old, &djo.fs, 1);
    18     if (res == FR_OK) {
    19         djn.fs = djo.fs;
    20         INIT_BUF(djo);
    21         res = follow_path(&djo, path_old);        /* Check old object */
    22         if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
    23             res = FR_INVALID_NAME;
    24 #if _FS_SHARE
    25         if (res == FR_OK) res = chk_lock(&djo, 2);
    26 #endif
    27         if (res == FR_OK) {                        /* Old object is found */
    28             if (!djo.dir) {                        /* Is root dir? */
    29                 res = FR_NO_FILE;
    30             } else {
    31                 mem_cpy(buf, djo.dir+DIR_Attr, 21);        /* Save the object information except for name */
    32                 mem_cpy(&djn, &djo, sizeof(DIR));        /* Check new object */
    33                 res = follow_path(&djn, path_new);
    34                 if (res == FR_OK) res = FR_EXIST;        /* The new object name is already existing */
    35                 if (res == FR_NO_FILE) {                 /* Is it a valid path and no name collision? */
    36 /* Start critical section that any interruption or error can cause cross-link */
    37                     res = dir_register(&djn);            /* Register the new entry */
    38                     if (res == FR_OK) {
    39                         dir = djn.dir;                    /* Copy object information except for name */
    40                         mem_cpy(dir+13, buf+2, 19);
    41                         dir[DIR_Attr] = buf[0] | AM_ARC;
    42                         djo.fs->wflag = 1;
    43                         if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) {        /* Update .. entry in the directory if needed */
    44                             dw = clust2sect(djn.fs, LD_CLUST(dir));
    45                             if (!dw) {
    46                                 res = FR_INT_ERR;
    47                             } else {
    48                                 res = move_window(djn.fs, dw);
    49                                 dir = djn.fs->win+SZ_DIR;    /* .. entry */
    50                                 if (res == FR_OK && dir[1] == '.') {
    51                                     dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust;
    52                                     ST_CLUST(dir, dw);
    53                                     djn.fs->wflag = 1;
    54                                 }
    55                             }
    56                         }
    57                         if (res == FR_OK) {
    58                             res = dir_remove(&djo);        /* Remove old entry */
    59                             if (res == FR_OK)
    60                                 res = sync(djo.fs);
    61                         }
    62                     }
    63 /* End critical section */
    64                 }
    65             }
    66         }
    67         FREE_BUF();
    68     }
    69     LEAVE_FF(djo.fs, res);
    70 }
    View Code

    函数功能:重命名一个对象。

    描述:

    f_rename函数当_FS_READONLY == 0并且_FS_MINIMIZE == 0时可用。
    f_rename函数重命名一个对象,并且也可以将对象移动到其他目录。逻辑驱动器号由原名决定,新名不能包含一个逻辑驱动器号。不要重命名打开的对象。

    例:

    1     /* 重命名一个对象 */
    2     f_rename("oldname.txt", "newname.txt");
    3  
    4     /* 重命名并且移动一个对象到另一个目录 */
    5     f_rename("oldname.txt", "dir1/newname.txt");
    View Code
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  • 原文地址:https://www.cnblogs.com/Danhuise/p/3911937.html
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