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Introduce a new option (BOOT_PROMPT_123) that lets enter the boot prompt

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only when typing the sequence "123" (opposite to the standard 'push any
button' approach).
That results useful when using serial lines sending garbage and leading
to unwilling boot prompt appearence.

Obtained from:	Sandvine Incorporated
Reviewed by:	emaste, jhb
Sponsored by:	Sandvine Incorporated
MFC:		1 week
This commit is contained in:
Attilio Rao 2009-11-12 01:30:17 +00:00
parent 023c800576
commit 909feda120
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=199210
2 changed files with 22 additions and 0 deletions
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4
sys/boot/common/Makefile.inc
View file

@ -38,4 +38,8 @@ MAN+= ../forth/loader.conf.5
MAN+= ../forth/loader.4th.8
.endif
.if defined(BOOT_PROMPT_123)
CFLAGS+= -DBOOT_PROMPT_123
.endif
MAN+= loader.8

18
sys/boot/common/boot.c
View file

@ -162,6 +162,9 @@ autoboot(int timeout, char *prompt)
int c, yes;
char *argv[2], *cp, *ep;
char *kernelname;
#ifdef BOOT_PROMPT_123
const char *seq = "123", *p = seq;
#endif
autoboot_tried = 1;
@ -192,14 +195,29 @@ autoboot(int timeout, char *prompt)
yes = 0;
#ifdef BOOT_PROMPT_123
printf("%s\n", (prompt == NULL) ? "Hit [Enter] to boot immediately, or "
"1 2 3 sequence for command prompt." : prompt);
#else
printf("%s\n", (prompt == NULL) ? "Hit [Enter] to boot immediately, or any other key for command prompt." : prompt);
#endif
for (;;) {
if (ischar()) {
c = getchar();
#ifdef BOOT_PROMPT_123
if ((c == '\r') || (c == '\n')) {
yes = 1;
break;
} else if (c != *p++)
p = seq;
if (*p == 0)
break;
#else
if ((c == '\r') || (c == '\n'))
yes = 1;
break;
#endif
}
ntime = time(NULL);
if (ntime >= when) {