altos: Support open on multiple simultaneous FAT files

Need to be able to see the contents of a log file, even if the logger
is running.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/drivers/ao_fat.h b/src/drivers/ao_fat.h
index fe154cdf..01435363 100644
--- a/src/drivers/ao_fat.h
+++ b/src/drivers/ao_fat.h
@@ -81,20 +81,20 @@ int8_t
 ao_fat_creat(char name[11]);
 
 int8_t
-ao_fat_close(void);
+ao_fat_close(int8_t fd);
 
 int
-ao_fat_read(void *dest, int len);
+ao_fat_read(int8_t fd, void *dest, int len);
 
 int
-ao_fat_write(void *src, int len);
+ao_fat_write(int8_t fd, void *src, int len);
 
 #define AO_FAT_SEEK_SET	0
 #define AO_FAT_SEEK_CUR	1
 #define AO_FAT_SEEK_END	2
 
 int32_t
-ao_fat_seek(int32_t pos, uint8_t whence);
+ao_fat_seek(int8_t fd, int32_t pos, uint8_t whence);
 
 int8_t
 ao_fat_unlink(char name[11]);