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Don't allow i/o operations for non-root users.

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This commit is contained in:
Bruce Evans 1995-10-14 07:09:58 +00:00
parent 21e00296ec
commit f2b0c6b282
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=11467
1 changed files with 4 additions and 0 deletions
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4
sys/i386/isa/spigot.c
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@ -207,6 +207,7 @@ struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
int
spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
{
int error;
struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
struct trapframe *fp;
struct spigot_info *info;
@ -218,6 +219,9 @@ struct spigot_info *info;
ss->signal_num = *((int *)data);
break;
case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return error;
fp=(struct trapframe *)p->p_md.md_regs;
fp->tf_eflags |= PSL_IOPL;
break;