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.TH tty 1 "2011 年 7 月 28 日" "SunOS 5.11" "用户命令"
.SH 名称
tty \- 返回用户的终端名称
.SH 用法概要
.LP
.nf
\fB/usr/bin/tty\fR [\fB-l\fR] [\fB-s\fR]
.fi

.SH 描述
.sp
.LP
\fBtty\fR 实用程序可将以标准输入格式打开的终端的名称写入标准输出。使用的名称等效于 \fBttyname\fR(3C) 函数返回的字符串。
.SH 选项
.sp
.LP
支持以下选项：
.sp
.ne 2
.mk
.na
\fB\fB-l\fR\fR
.ad
.RS 6n
.rt  
列显用户终端（如果它在有效的同步行中）连接到的同步行号。
.RE

.sp
.ne 2
.mk
.na
\fB\fB-s\fR\fR
.ad
.RS 6n
.rt  
禁止输出终端路径名，只允许测试退出状态。
.RE

.SH 环境变量
.sp
.LP
有关影响 \fBtty\fR 执行的环境变量 \fBLANG\fR、\fBLC_ALL\fR、\fBLC_CTYPE\fR、\fBLC_MESSAGES\fR 和 \fBNLSPATH\fR 的说明，请参见 \fBenviron\fR(5)。 
.SH 退出状态
.sp
.LP
将返回以下退出值：
.sp
.ne 2
.mk
.na
\fB\fB0\fR\fR
.ad
.RS 6n
.rt  
标准输入是终端。
.RE

.sp
.ne 2
.mk
.na
\fB\fB1\fR\fR
.ad
.RS 6n
.rt  
标准输入不是终端。
.RE

.sp
.ne 2
.mk
.na
\fB\fB>1\fR\fR
.ad
.RS 6n
.rt  
出现错误。
.RE

.SH 属性
.sp
.LP
有关下列属性的说明，请参见 \fBattributes\fR(5)：
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
属性类型属性值
_
可用性system/core-os
_
CSIEnabled（已启用）
_
接口稳定性Committed（已确定）
_
标准\fBstandards\fR(5)。
.TE

.SH 另请参见
.sp
.LP
\fBisatty\fR(3C)、\fBttyname\fR(3C)、\fBattributes\fR(5)、\fBenviron\fR(5)、\fBstandards\fR(5)
.SH 诊断
.sp
.ne 2
.mk
.na
\fB\fBnot on an active synchronous line\fR\fR
.ad
.sp .6
.RS 4n
标准输入不是同步终端，并且指定了 \fB-l\fR。
.RE

.sp
.ne 2
.mk
.na
\fB\fBnot a tty\fR\fR
.ad
.sp .6
.RS 4n
标准输入不是终端，并且未指定 \fB-s\fR。
.RE

.SH 附注
.sp
.LP
仅当退出状态是需要的状态时 \fB-s\fR 选项才有用。它并不依赖于构成有效路径名的能力。可移植应用程序应该使用 \fBtest\fR \fB-t\fR。