| TTYMSG(3) | Library Functions Manual | TTYMSG(3) |
ttymsg — ttymsg
utility function
System Utilities Library (libutil, -lutil)
#include
<util.h>
char *
ttymsg(struct
iovec *iov, int
iovlen, const char
*tty, int
tmout);
The
ttymsg()
function is used by programs such as
talkd(8),
syslogd(8),
wall(1), etc., to display the
contents of a uio structure on a terminal. ttymsg()
forks and finishes in the child if the write would block after waiting up to
tmout seconds.
ttymsg() returns a pointer to an error
string on unexpected error; the string is not newline-terminated. Various
"normal" errors are ignored (exclusive-use, lack of permission,
etc.).
ttymsg could grow some flags and a
username/uid who is the expected owner of the tty. If the flags say so then
the owner should be checked against the tty owner, and the message should
not be sent if there is a mismatch. Also another flag could say check
against group writable, and don't send a message.
| January 15, 2013 | NetBSD 11.0 |