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fs: fat: add rename

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The implementation roughly follows the POSIX specification for
rename() [1]. The ordering of operations attempting to minimize the chance
for data loss in unexpected circumstances.

The 'mv' command was implemented as a front end for the rename operation
as that is what most users are likely familiar with in terms of behavior.

The 'FAT_RENAME' Kconfig option was added to prevent code size increase on
size-oriented builds like SPL.

[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html

Signed-off-by: Gabriel Dalimonte <gabriel.dalimonte@gmail.com>
This commit is contained in:
Gabriel Dalimonte
2025-02-17 13:26:44 -05:00
committed by Tom Rini
parent d9c149664f
commit 06159a1465
11 changed files with 930 additions and 1 deletions
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2
include/fs.h
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@@ -302,6 +302,8 @@ int do_mkdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
int fstype);
int do_ln(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
int fstype);
int do_mv(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
int fstype);
/*
* Determine the UUID of the specified filesystem and print it. Optionally it is