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-rw-r--r--doc/README.autoboot15
1 files changed, 11 insertions, 4 deletions
diff --git a/doc/README.autoboot b/doc/README.autoboot
index e4c4186..2042fe5 100644
--- a/doc/README.autoboot
+++ b/doc/README.autoboot
@@ -114,10 +114,17 @@ What they do
CONFIG_AUTOBOOT_PROMPT is displayed before the boot delay
selected by CONFIG_BOOTDELAY starts. If it is not defined
there is no output indicating that autoboot is in progress.
- If "%d" is included, it is replaced by the number of seconds
- remaining before autoboot will start, but it does not count
- down the seconds. "autoboot in %d seconds\n" is a reasonable
- prompt.
+
+ Note that CONFIG_AUTOBOOT_PROMPT is used as the (only)
+ argument to a printf() call, so it may contain '%' format
+ specifications, provided that it also includes, sepearated by
+ commas exactly like in a printf statement, the required
+ arguments. It is the responsibility of the user to select only
+ such arguments that are valid in the given context. A
+ reasonable prompt could be defined as
+
+ #define CONFIG_AUTOBOOT_PROMPT \
+ "autoboot in %d seconds\n",bootdelay
If CONFIG_AUTOBOOT_DELAY_STR or "bootdelaykey" is specified
and this string is received from console input before