GNU bug report logs - #48081
diff on windows doest work with same path but different drives

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Message #8 received at 48081 <at> debbugs.gnu.org (full text, mbox):

From: dreverser <at> gmail.com
To: 48081 <at> debbugs.gnu.org
Subject: bug#48081: Acknowledgement (diff on windows doest work with same path
 but different drives)
Date: Thu, 29 Apr 2021 18:16:02 +0300

after little research iam found the issue

iam using many cloned virtual disk drives
which has same serial number (becase was cloned)

diff uses "stat" call to get info about disk
so when i use sync between this disks
i have another mont drive letter  but same serial number, same path
diff -urN D:\path E:\path  give me there no diff, path the same

so i propose little fix for this
just edit at the file diffutils-3.7\lib\stat-w32.c

to "buf->st_dev" after assign "VolumeSerialNumber"
add disk drive letter
this will produce unique "st_dev"
and diff will work for such cases

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