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Add more strictly size check into Fdopen to eliminate

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possible end-user errors.
Now:
1) on physical 1.2 can open logical 1.2, 720, 360H
2) on physical 1.44 can open logical 1.44, 720
3) on physical 360 can open logical 360
All other variants refused.
C-style improved in this check, multiply if's changed to switch.
This commit is contained in:
Andrey A. Chernov 1993-12-13 01:34:28 +00:00
parent dffff499a9
commit fa4700b4f1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=855
3 changed files with 42 additions and 12 deletions
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18
sys/dev/fdc/fdc.c
View file

@ -529,10 +529,20 @@ Fdopen(dev, flags)
if (fdu >= NFD || fd_data[fdu].fdc == NULL
|| fd_data[fdu].type == NO_TYPE) return(ENXIO);
if (type >= NUMTYPES) return(ENXIO);
if (fd_data[fdu].type == FD360 && type != FD360)
return(ENXIO);
if (fd_data[fdu].type == FD12 && type == FD144)
return(ENXIO);
switch (fd_data[fdu].type) {
case FD360:
if (type != FD360)
return(ENXIO);
break;
case FD12:
if (type == FD144 || type == FD360)
return(ENXIO);
break;
case FD144:
if (type == FD12 || type == FD360 || type == FD360H)
return(ENXIO);
break;
}
fd_data[fdu].ft = fd_types + type;
fd_data[fdu].flags |= FD_OPEN;

18
sys/i386/isa/fd.c
View file

@ -529,10 +529,20 @@ Fdopen(dev, flags)
if (fdu >= NFD || fd_data[fdu].fdc == NULL
|| fd_data[fdu].type == NO_TYPE) return(ENXIO);
if (type >= NUMTYPES) return(ENXIO);
if (fd_data[fdu].type == FD360 && type != FD360)
return(ENXIO);
if (fd_data[fdu].type == FD12 && type == FD144)
return(ENXIO);
switch (fd_data[fdu].type) {
case FD360:
if (type != FD360)
return(ENXIO);
break;
case FD12:
if (type == FD144 || type == FD360)
return(ENXIO);
break;
case FD144:
if (type == FD12 || type == FD360 || type == FD360H)
return(ENXIO);
break;
}
fd_data[fdu].ft = fd_types + type;
fd_data[fdu].flags |= FD_OPEN;

18
sys/isa/fd.c
View file

@ -529,10 +529,20 @@ Fdopen(dev, flags)
if (fdu >= NFD || fd_data[fdu].fdc == NULL
|| fd_data[fdu].type == NO_TYPE) return(ENXIO);
if (type >= NUMTYPES) return(ENXIO);
if (fd_data[fdu].type == FD360 && type != FD360)
return(ENXIO);
if (fd_data[fdu].type == FD12 && type == FD144)
return(ENXIO);
switch (fd_data[fdu].type) {
case FD360:
if (type != FD360)
return(ENXIO);
break;
case FD12:
if (type == FD144 || type == FD360)
return(ENXIO);
break;
case FD144:
if (type == FD12 || type == FD360 || type == FD360H)
return(ENXIO);
break;
}
fd_data[fdu].ft = fd_types + type;
fd_data[fdu].flags |= FD_OPEN;