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Slightly change the API for the SNPSTTY ioctl so that the userland now

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provides a file descriptor instead of a dev_t.

Discussed with:	phk
MFC after: 3 days
This commit is contained in:
Olivier Houchard 2005-09-18 19:23:35 +00:00
parent 323d07b497
commit 30ce1aad9c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=150298
2 changed files with 16 additions and 9 deletions
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19
sys/dev/snp/snp.c
View File

@ -30,6 +30,8 @@ __FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/snoop.h>
#include <sys/uio.h>
#include <sys/file.h>
#include <sys/vnode.h>
static l_close_t snplclose;
static l_write_t snplwrite;
@ -518,16 +520,22 @@ snpioctl(dev, cmd, data, flags, td)
struct snoop *snp;
struct tty *tp, *tpo;
struct cdev *tdev;
struct file *fp;
int s;
snp = dev->si_drv1;
switch (cmd) {
case SNPSTTY:
#if 0
tdev = findcdev(*((dev_t *)data));
#else
tdev = NULL;
#endif
s = *(int *)data;
if (s < 0 || fget(td, s, &fp) != 0)
return (EINVAL);
if (fp->f_type != DTYPE_VNODE ||
fp->f_vnode->v_type != VCHR) {
fdrop(fp, td);
return (EINVAL);
}
tdev = fp->f_vnode->v_rdev;
fdrop(fp, td);
if (tdev == NULL)
return (snp_down(snp));
@ -585,6 +593,7 @@ snpioctl(dev, cmd, data, flags, td)
*(int *)data = snp->snp_len;
else
if (snp->snp_flags & SNOOP_DOWN) {
printf("IT IS DOWN\n");
if (snp->snp_flags & SNOOP_OFLOW)
*(int *)data = SNP_OFLOW;
else

6
sys/sys/snoop.h
View File

@ -25,12 +25,10 @@
/*
* These are snoop io controls
* SNPSTTY accepts 'struct snptty' as input.
* If ever type or unit set to -1,snoop device
* detached from its current tty.
* SNPSTTY accepts a file descriptor as input.
*/
#define SNPSTTY _IOW('T', 90, dev_t)
#define SNPSTTY _IOW('T', 90, int)
#define SNPGTTY _IOR('T', 89, dev_t)
/*