svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
wall(8)
System Administration Commands wall(8)
NAME
wall - write to all users
SYNOPSIS
/usr/sbin/wall [-a] [-g grpname] [filename]
DESCRIPTION
wall reads its standard input until an end-of-file. It then sends this
message to all currently logged-in users preceded by:
Broadcast Message from ...
If filename is given, then the message is read in from that file.
It is used to warn all users, typically prior to shutting down the sys‐
tem. Normally, pseudo-terminals that do not correspond to login ses‐
sions are ignored. Thus, when using a window system, the message
appears only on the console window. However, -a will send the message
even to such pseudo-terminals.
The sender must have all privileges to override any protections the
users may have invoked. See mesg(1).
wall runs setgid() to the group ID tty, in order to have write permis‐
sions on other user's terminals. See setuid(2).
wall will detect non-printable characters before sending them to the
user's terminal. Control characters will appear as a "^" followed by
the appropriate ASCII character; characters with the high-order bit set
will appear in "meta" notation. For example, '\003' is displayed as
'^C' and '\372' as 'M−z'.
OPTIONS
The following options are supported:
-a Broadcast message to the console and pseudo-terminals.
-g grpname Broadcast to the users in a specified group only, per the
group database (see group(5)).
ENVIRONMENT VARIABLES
If the LC_* variables (LC_CTYPE, LC_TIME, LC_COLLATE, LC_NUMERIC, and
LC_MONETARY) are not set in the environment, the operational behavior
of wall for each corresponding locale category is determined by the
value of the LANG environment variable. See environ(7). If LC_ALL is
set, its contents are used to override both the LANG and the other LC_*
variables. If none of the above variables are set in the environment,
the "C" (U.S. style) locale determines how wall behaves.
FILES
/dev/tty*
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitysystem/core-os
SEE ALSO
mesg(1), write(1), setuid(2), attributes(7), environ(7)
NOTES
wall displays "Cannot send to ..." when it fails to open a user's tty
file.
Oracle Solaris 11.4 3 Nov 2021 wall(8)