[Info-vax] Interesting NFS bug...

[JF Mezei]

OS-X mounted  disk via NFS on VMS (VMS acts as NFS server).

ditto used to copy files tro the OS-X disk.

the last bit of index.html from VMS:

> 22534D56 20796220 64657265 776F5022 "Powered by VMS" 0000C0
>  72742F3C 0005003E 64742F3C 0005003E >...</td>...</tr 0000D0
>  3E64743C 3E72743C 00150000 0000003E >.......<tr><td> 0000E0
>  0000003E 72742F3C 3E64742F 3C3E703C <p></td></tr>... 0000F0
>  2F3C0007 00003E65 6C626174 2F3C0008 ..</table>....</ 000100
>  003E6C6D 74682F3C 0007003E 79646F62 body>...</html>. 000110
>  00000000 00000000 00000000 0000FFFF ................ 000120
>  00000000 00000000 00000000 00000000 ................ 000130
>  00000000 00000000 00000000 00000000 ................ 000140
>  00000000 00000000 00000000 00000000 ................ 000150
>  00000000 00000000 00000000 00000000 ................ 000160
>  00000000 00000000 00000000 00000000 ................ 000170
>  00000000 00000000 00000000 00000000 ................ 000180
>  00000000 00000000 00000000 00000000 ................ 000190
>  00000000 00000000 00000000 00000000 ................ 0001A0
>  00000000 00000000 00000000 00000000 ................ 0001B0
>  00000000 00000000 00000000 00000000 ................ 0001C0
>  00000000 00000000 00000000 00000000 ................ 0001D0
>  00000000 00000000 00000000 00000000 ................ 0001E0
>  00000000 00000000 00000000 00000000 ................ 0001F0


After copy to OS-X:


> 000011c0  74 3d 22 50 6f 77 65 72  65 64 20 62 79 20 56 4d  |t="Powered by VM|
> 000011d0  53 22 3e 0a 3c 2f 74 64  3e 0a 3c 2f 74 72 3e 0a  |S">.</td>.</tr>.|
> 000011e0  0a 0a 3c 74 72 3e 3c 74  64 3e 3c 70 3e 3c 2f 74  |..<tr><td><p></t|
> 000011f0  64 3e 3c 2f 74 72 3e 0a  0a 3c 2f 74 61 62 6c 65  |d></tr>..</table|
> 00001200  3e 0a 0a 3c 2f 62 6f 64  79 3e 0a 3c 2f 68 74 6d  |>..</body>.</htm|
> 00001210  6c 3e 0a 00 3f 00 a0 00  39 00 0b 01 05 00 20 20  |l>..?...9.....  |
> 00001220  20 31 35 00 38 00 04 00  3f 00 a0 00 00 40 00 00  | 15.8...?.... at ..|
> 00001230  08 00 a0 00 38 00 04 00  3f 00 a0 00 00 40 00 00  |....8...?.... at ..|
> 00001240  3b 00 a0 00 4a 00 08 00  82 00 a0 00 3f 00 a0 00  |;...J.......?...|
> 00001250  6a 00 0b 01 0b 00 32 31  2d 4e 4f 56 2d 32 30 30  |j.....21-NOV-200|
> 00001260  39 00 00 00 38 00 04 00  3f 00 a0 00 00 40 00 00  |9...8...?.... at ..|
> 00001270  08 00 a0 00 38 00 04 00  3f 00 a0 00 00 40 00 00  |....8...?.... at ..|
> 00001280  3b 00 a0 00 4a 00 0a 00  82 00 a0 00 3f 00 a0 00  |;...J.......?...|
> 00001290  c5 00 0b 01 14 00 53 4d  54 50 25 22 64 6a 66 30  |......SMTP%"xxxx|
> 000012a0  31 40 62 69 6b 65 6f 64  79 73 00 00 38 00 04 00  |x at xxxxxxxx..8...|
> 000012b0  3f 00 a0 00 00 40 00 00  08 00 a0 00 38 00 04 00  |?.... at ......8...|
> 000012c0  3f 00 a0 00 00 40 00 00  3b 00 a0 00 4a 00 0c 00  |?.... at ..;...J...|
> 000012d0  82 00 a0 00 3f 00 a0 00  5f 01 0b 01 1e 00 52 65  |....?..._.....Re|
> 000012e0  3a 20 4c 61 73 74 20 57  65 65 6b 73 20 54 72 61  |: Last Weeks Tra|
> 000012f0  69 6e 20 41 64 76 65 6e  74 75 72 65 38 00 04 00  |in Adventure8...|
> 00001300  3f 00 a0 00 00 40 00 00  08 00 a0 00 82 00 c0 00  |?.... at ..........|
> 00001310  82 00 c0 00 40 00 c0 00  00 00 00 01 00 00 00 00  |.... at ...........|
> 00001320


In other words, the NFS server on VMS filled data beyond the end of file
with text from another file. So much for VMS file system security.


Performing the copy from VMS ($COPY on VMS with Unix acting as NFS
server) did not add content to the end of file.

However, one cannot copy a whole directory tree this way. Backup creates
files on the other system with file extensions as part of file name. so
instead of "myimage.jpg" you have "myimage.jpg;3"

Looks like FTP is needed.