diff options
author | ugen <ugen@FreeBSD.org> | 1995-02-17 18:06:11 +0000 |
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committer | ugen <ugen@FreeBSD.org> | 1995-02-17 18:06:11 +0000 |
commit | 945e0491791312a44a807a1b34c88cddf8038d07 (patch) | |
tree | 2f19f894626fc7a0ec3199260bd23600746ac65d /usr.bin/watch | |
parent | 17d7743fc934dddce3a62b80663fc6696c32af7a (diff) | |
download | FreeBSD-src-945e0491791312a44a807a1b34c88cddf8038d07.zip FreeBSD-src-945e0491791312a44a807a1b34c88cddf8038d07.tar.gz |
oops..here is the manpage
Diffstat (limited to 'usr.bin/watch')
-rw-r--r-- | usr.bin/watch/snp.4 | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/usr.bin/watch/snp.4 b/usr.bin/watch/snp.4 new file mode 100644 index 0000000..47b97d8 --- /dev/null +++ b/usr.bin/watch/snp.4 @@ -0,0 +1,49 @@ +.Dd Februar 17, 1995 +.Dt SNP(4) +.Os +.Sh NAME + + snp - tty snoop interface. + +.Sh SYNOPSIS +#include <sys/snoop.h> + +.Sh DESCRIPTION + /dev/snp? are snoop devices which allow user to attach to any tty +and watch activities on it. Device can be used by root only. + To connect device to tty use special iocontrol SNPSTTY.Argument to +it is a structure 'snptty'. + struct snptty { + int st_type; + int st_unit; + } + +st_type - type of tty to attach. Currently supported are : + ST_PTY - pseudo-tty devices. + ST_VTY - virtual ttys (syscons). + ST_SIO - serial ttys. + +st_unit - number of tty unit. +By specifying ever st_type or st_unit -1 user can detach snp +device from tty. + + SNPGTTY - iocontrol returns current tty attached. + FIONREAD - iocontrol returns ever positive value equal to number of + characters in read buffer. Also special values defined: + SNP_OFLOW - device overflow occured,device automatically + detached. + SNP_TTYCLOSE - tty still has not been attached. + SNP_DETACH - snp device has been detached by user or + tty device has been closed and detached + automatically. + +.Sh SEE ALSO + +watch(8), pty(4), sio(4) +.Sh BUGS + +While in line mode,user input can't be seen. +Has no ability to write to attached tty device. + +.Sh HISTORY +FreeBSD 2.1 by Ugen J.S.Antsilevich <ugen@NetVision.net.il> |