Rev 5215 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5215 | serge | 1 | /* _rename.c -- Implementation of the low-level rename() routine |
| 2 | * |
||
| 3 | * Copyright (c) 2004 National Semiconductor Corporation |
||
| 4 | * |
||
| 5 | * The authors hereby grant permission to use, copy, modify, distribute, |
||
| 6 | * and license this software and its documentation for any purpose, provided |
||
| 7 | * that existing copyright notices are retained in all copies and that this |
||
| 8 | * notice is included verbatim in any distributions. No written agreement, |
||
| 9 | * license, or royalty fee is required for any of the authorized uses. |
||
| 10 | * Modifications to this software may be copyrighted by their authors |
||
| 11 | * and need not follow the licensing terms described here, provided that |
||
| 12 | * the new terms are clearly indicated on the first page of each file where |
||
| 13 | * they apply. |
||
| 14 | */ |
||
| 15 | |||
| 16 | #include |
||
| 17 | #include |
||
| 18 | #include |
||
| 19 | #include |
||
| 20 | |||
| 21 | int _rename (char *from, char *to) |
||
| 22 | { |
||
| 23 | void* buf; |
||
| 24 | int f_from; |
||
| 25 | int f_to; |
||
| 26 | int size; |
||
| 27 | |||
| 28 | f_from = open(from,O_RDONLY); |
||
| 29 | |||
| 30 | if (f_from < 0) |
||
| 31 | { |
||
| 32 | errno = ENOENT; |
||
| 33 | return -1; |
||
| 34 | }; |
||
| 35 | |||
| 36 | f_to = open(to,O_CREAT|O_WRONLY|O_EXCL); |
||
| 37 | |||
| 38 | if (f_to < 0) |
||
| 39 | { |
||
| 40 | close(f_from); |
||
| 41 | errno = EACCES; |
||
| 42 | return -1; |
||
| 43 | }; |
||
| 44 | |||
| 45 | buf = alloca(32768); |
||
| 46 | |||
| 47 | do |
||
| 48 | { |
||
| 49 | size = read(f_from, buf, 32768); |
||
| 50 | |||
| 51 | if (size >= 0) |
||
| 52 | size = write(f_to, buf, size); |
||
| 53 | |||
| 54 | }while (size == 32768); |
||
| 55 | |||
| 56 | close(f_to); |
||
| 57 | close(f_from); |
||
| 58 | |||
| 59 | if (size == -1) |
||
| 60 | { |
||
| 61 | errno = EACCES; |
||
| 62 | return -1; |
||
| 63 | }; |
||
| 64 | |||
| 65 | remove(from); |
||
| 66 | |||
| 67 | return (0); |
||
| 68 | }; |