btrfs-progs: restore: Fix input buffer handling

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fgets consumes n-1 bytes from input buffer.

When a user types y\n, the newline is left in the buffer.  As a result,
the next fgets uses that \n as answer without waiting for the user to
type.

This patch also fix a bug that dereference the ret without checking if
it's NULL.

* Consumes the `\n` from stdin buffer
* Avoid NULL pointer dereference: treat EOF as default value

Pull-request: #182
Author: pjw91 <mail6543210@yahoo.com.tw>
Signed-off-by: David Sterba <dsterba@suse.com>

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This commit is contained in:

pjw91 2019-06-19 02:24:53 +08:00 committed by David Sterba

parent 5dfbc7c42a

commit 064341dca9

1 changed files with 3 additions and 3 deletions

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