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Add select() support, required for OpenSSH.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8614 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol
2004-08-20 22:31:05 +00:00
parent a7529effe6
commit 6c29244a56
1 changed files with 37 additions and 3 deletions
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src/add-ons/kernel/drivers/random/driver.c
+37 -3
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@@ -22,6 +22,14 @@
# define TRACE(x) ;
#endif
#ifndef B_SELECT_READ
/* these are missing from KernelExport.h ... */
# define B_SELECT_READ 1
# define B_SELECT_WRITE 2
# define B_SELECT_EXCEPTION 3
extern void notify_select_event(selectsync * sync, uint32 ref);
#endif /* B_SELECT_READ */
int32 api_version = B_CUR_DRIVER_API_VERSION;
#define DRIVER_NAME "random"
@@ -38,6 +46,9 @@ static status_t random_write(void *cookie, off_t position, const void *buffer, s
static status_t random_control(void *cookie, uint32 op, void *arg, size_t length);
static status_t random_close(void *cookie);
static status_t random_free(void *cookie);
static status_t random_select(void *cookie, uint8 event, uint32 ref, selectsync *sync);
static status_t random_deselect(void *cookie, uint8 event, selectsync *sync);
static device_hooks sRandomHooks = {
random_open,
@@ -46,8 +57,8 @@ static device_hooks sRandomHooks = {
random_control,
random_read,
random_write,
NULL,
NULL,
random_select,
random_deselect,
NULL,
NULL
};
@@ -395,6 +406,7 @@ random_read(void *cookie, off_t position, void *_buffer, size_t *_numBytes)
int32 *buffer = (int32 *)_buffer;
uint8 *buffer8 = (uint8 *)_buffer;
uint32 i, j;
TRACE((DRIVER_NAME ": read(%Ld,, %d)\n", position, *_numBytes));
acquire_sem(sRandomSem);
sRandomCount += *_numBytes;
@@ -422,7 +434,9 @@ random_read(void *cookie, off_t position, void *_buffer, size_t *_numBytes)
static status_t
random_write(void *cookie, off_t position, const void *buffer, size_t *_numBytes)
{
return B_OK;
TRACE((DRIVER_NAME ": write(%Ld,, %d)\n", position, *_numBytes));
*_numBytes = 0;
return EINVAL;
}
@@ -448,3 +462,23 @@ random_free(void *cookie)
TRACE((DRIVER_NAME ": free()\n"));
return B_OK;
}
static status_t
random_select(void *cookie, uint8 event, uint32 ref, selectsync *sync)
{
TRACE((DRIVER_NAME ": select()\n"));
/* tell there is already data to read */
if (event == B_SELECT_READ)
notify_select_event(sync, ref);
else if (event == B_SELECT_WRITE)
return EINVAL; /* not writable */
return B_OK;
}
static status_t
random_deselect(void *cookie, uint8 event, selectsync *sync)
{
TRACE((DRIVER_NAME ": deselect()\n"));
return B_OK;
}