| snp.4 (68962) | snp.4 (70466) |
|---|---|
| 1.\" | 1.\" |
| 2.\" $FreeBSD: head/share/man/man4/snp.4 68962 2000-11-20 18:41:33Z ru $ | 2.\" $FreeBSD: head/share/man/man4/snp.4 70466 2000-12-29 09:18:45Z ru $ |
| 3.\" 4.Dd February 24, 1995 5.Dt SNP 4 6.Os FreeBSD 7.Sh NAME 8.Nm snp 9.Nd tty snoop interface 10.Sh SYNOPSIS 11.Fd #include <sys/snoop.h> 12.Ft int 13.Fn ioctl fd SNPSTTY &dev 14.Ft int 15.Fn ioctl fd SNPGTTY &dev 16.Ft int 17.Fn ioctl fd FIONREAD &result 18.Sh DESCRIPTION 19/dev/snp? are snoop devices which allow user to attach to any tty 20and watch activities on it. | 3.\" 4.Dd February 24, 1995 5.Dt SNP 4 6.Os FreeBSD 7.Sh NAME 8.Nm snp 9.Nd tty snoop interface 10.Sh SYNOPSIS 11.Fd #include <sys/snoop.h> 12.Ft int 13.Fn ioctl fd SNPSTTY &dev 14.Ft int 15.Fn ioctl fd SNPGTTY &dev 16.Ft int 17.Fn ioctl fd FIONREAD &result 18.Sh DESCRIPTION 19/dev/snp? are snoop devices which allow user to attach to any tty 20and watch activities on it. |
| 21 | 21.Pp |
| 22To associate a given 23.Nm 24device with a tty to be observed, open the 25.Nm 26device and then use the SNPSTTY ioctl. 27The argument passed to the IOCTL is the address of a variable of type 28dev_t. 29By setting the value of the variable pointed to -1, the user may detach --- 11 unchanged lines hidden (view full) --- 41.It Dv SNP_OFLOW 42device overflow occured, device detached. 43.It Dv SNP_TTYCLOSE 44tty not attached. 45.It Dv SNP_DETACH 46.Nm 47device has been detached by user or tty device has been closed 48and detached. | 22To associate a given 23.Nm 24device with a tty to be observed, open the 25.Nm 26device and then use the SNPSTTY ioctl. 27The argument passed to the IOCTL is the address of a variable of type 28dev_t. 29By setting the value of the variable pointed to -1, the user may detach --- 11 unchanged lines hidden (view full) --- 41.It Dv SNP_OFLOW 42device overflow occured, device detached. 43.It Dv SNP_TTYCLOSE 44tty not attached. 45.It Dv SNP_DETACH 46.Nm 47device has been detached by user or tty device has been closed 48and detached. |
| 49.El |
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| 49.Sh SEE ALSO 50.Xr pty 4 , 51.Xr sio 4 , 52.Xr watch 8 53.Sh RESTRICTIONS 54Only the superuser may access the 55.Nm 56devices. 57.Sh BUGS 58While in line mode, user input can't be seen. 59No signals may be sent to the observed tty. 60.Sh AUTHORS 61.An Ugen J.S. Antsilevich Aq ugen@NetVision.net.il 62.Sh HISTORY 63The 64.Nm 65device first appeared in 66.Fx 2.1 . | 50.Sh SEE ALSO 51.Xr pty 4 , 52.Xr sio 4 , 53.Xr watch 8 54.Sh RESTRICTIONS 55Only the superuser may access the 56.Nm 57devices. 58.Sh BUGS 59While in line mode, user input can't be seen. 60No signals may be sent to the observed tty. 61.Sh AUTHORS 62.An Ugen J.S. Antsilevich Aq ugen@NetVision.net.il 63.Sh HISTORY 64The 65.Nm 66device first appeared in 67.Fx 2.1 . |