diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-11-13 04:09:26 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-11-13 04:09:26 +0000 |
| commit | d4aca1210000a8540821a01a557cb52607619788 (patch) | |
| tree | 1ffe4addc26091dd66741b4852f9e4f479f66985 /sys/arch/i386/isa/pcvt | |
| parent | a9bd75969560af6ac14ffa73c82292617ce171af (diff) | |
from netbsd:
Prevent endless loop (-> kernel crash) when a signal is sent to a process
waiting for a vt to become active. Move one ifdef XSERVER to the right place.
Diffstat (limited to 'sys/arch/i386/isa/pcvt')
| -rw-r--r-- | sys/arch/i386/isa/pcvt/pcvt_drv.c | 4 | ||||
| -rw-r--r-- | sys/arch/i386/isa/pcvt/pcvt_ext.c | 8 | ||||
| -rw-r--r-- | sys/arch/i386/isa/pcvt/pcvt_hdr.h | 3 |
3 files changed, 8 insertions, 7 deletions
diff --git a/sys/arch/i386/isa/pcvt/pcvt_drv.c b/sys/arch/i386/isa/pcvt/pcvt_drv.c index ad0cc727d95..fe7af81895c 100644 --- a/sys/arch/i386/isa/pcvt/pcvt_drv.c +++ b/sys/arch/i386/isa/pcvt/pcvt_drv.c @@ -611,11 +611,11 @@ pcioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) } #endif /* PCVT_EMU_MOUSE */ -#ifdef XSERVER if((error = usl_vt_ioctl(dev, cmd, data, flag, p)) >= 0) - return error; + return (error == PCVT_ERESTART) ? ERESTART : error; +#ifdef XSERVER /* * just for compatibility: * XFree86 < 2.0 and SuperProbe still might use it diff --git a/sys/arch/i386/isa/pcvt/pcvt_ext.c b/sys/arch/i386/isa/pcvt/pcvt_ext.c index 9bbe8dd022b..4b031d60b2b 100644 --- a/sys/arch/i386/isa/pcvt/pcvt_ext.c +++ b/sys/arch/i386/isa/pcvt/pcvt_ext.c @@ -2722,8 +2722,7 @@ usl_vt_ioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) int x = spltty(); i = current_video_screen; error = 0; - while (current_video_screen == i && - (error == 0 || error == ERESTART)) + while (current_video_screen == i && error == 0) { vs[i].vt_status |= VT_WAIT_ACT; error = tsleep((caddr_t)&vs[i].smode, @@ -2735,8 +2734,7 @@ usl_vt_ioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) { int x = spltty(); error = 0; - while (current_video_screen != i && - (error == 0 || error == ERESTART)) + while (current_video_screen != i && error == 0) { vs[i].vt_status |= VT_WAIT_ACT; error = tsleep((caddr_t)&vs[i].smode, @@ -2744,7 +2742,7 @@ usl_vt_ioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) } splx(x); } - return error; + return (error == ERESTART) ? PCVT_ERESTART : error; case KDENABIO: /* grant the process IO access; only allowed if euid == 0 */ diff --git a/sys/arch/i386/isa/pcvt/pcvt_hdr.h b/sys/arch/i386/isa/pcvt/pcvt_hdr.h index 86ec7c8e03b..6286e439132 100644 --- a/sys/arch/i386/isa/pcvt/pcvt_hdr.h +++ b/sys/arch/i386/isa/pcvt/pcvt_hdr.h @@ -914,6 +914,9 @@ typedef struct video_state { EXTERN video_state vs[PCVT_NSCREENS]; /* parameters for screens */ +/* used to be able to pass ERESTART on properly */ +#define PCVT_ERESTART (ELAST + 1) + /* possible states for video_state.vt_status: */ #define VT_WAIT_REL 1 /* wait till process released vt */ |