git: 9front

Download patch

ref: 4e50c5d1f0f4bd2eb4445c0c9497a81b0436a94c
parent: f767a88efc2c555b348c87bec4e967d185c8c831
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Sun Sep 16 09:47:33 EDT 2018 

9boot: don't let user erase the prompt (thanks mischief)


--- a/sys/src/boot/efi/sub.c
+++ b/sys/src/boot/efi/sub.c
@@ -110,13 +110,15 @@
 			if(f == nil){
 				while((*p = getc()) == 0)
 					;
+				if(p == buf && (*p == '\b' || strchr(white, *p) != nil))
+					continue;
 				putc(*p);
 				if(*p == '\r')
 					putc('\n');
-				else if(*p == '\b' && p > buf){
+				else if(*p == '\b'){
+					p--;
 					putc(' ');
 					putc('\b');
-					p--;
 					continue;
 				}
 			}else if(read(f, p, 1) <= 0)
--- a/sys/src/boot/pc/sub.c
+++ b/sys/src/boot/pc/sub.c
@@ -133,13 +133,15 @@
 			if(f == nil){
 				while((*p = getc()) == 0)
 					;
+				if(p == buf && (*p == '\b' || strchr(white, *p) != nil))
+					continue;
 				putc(*p);
 				if(*p == '\r')
 					putc('\n');
-				else if(*p == '\b' && p > buf){
+				else if(*p == '\b'){
+					p--;
 					putc(' ');
 					putc('\b');
-					p--;
 					continue;
 				}
 			}else if(read(f, p, 1) <= 0)
-- 
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