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

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This commit is contained in:
cinap_lenrek 2018-09-16 13:47:33 +02:00
parent 4080322dc9
commit ed41dd5b28
2 changed files with 8 additions and 4 deletions
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6
sys/src/boot/efi/sub.c
View file

@ -110,13 +110,15 @@ readline(void *f, char buf[64])
if(f == nil){ if(f == nil){
while((*p = getc()) == 0) while((*p = getc()) == 0)
; ;
if(p == buf && (*p == '\b' || strchr(white, *p) != nil))
continue;
putc(*p); putc(*p);
if(*p == '\r') if(*p == '\r')
putc('\n'); putc('\n');
else if(*p == '\b' && p > buf){ else if(*p == '\b'){
p--;
putc(' '); putc(' ');
putc('\b'); putc('\b');
p--;
continue; continue;
} }
}else if(read(f, p, 1) <= 0) }else if(read(f, p, 1) <= 0)

6
sys/src/boot/pc/sub.c
View file

@ -133,13 +133,15 @@ readline(void *f, char buf[64])
if(f == nil){ if(f == nil){
while((*p = getc()) == 0) while((*p = getc()) == 0)
; ;
if(p == buf && (*p == '\b' || strchr(white, *p) != nil))
continue;
putc(*p); putc(*p);
if(*p == '\r') if(*p == '\r')
putc('\n'); putc('\n');
else if(*p == '\b' && p > buf){ else if(*p == '\b'){
p--;
putc(' '); putc(' ');
putc('\b'); putc('\b');
p--;
continue; continue;
} }
}else if(read(f, p, 1) <= 0) }else if(read(f, p, 1) <= 0)