先贴段man出来的东东^_^,难得看e文不要紧,我后面实例说明 read [-ers] [-u fd] [-t timeout] [-a aname] [-p prompt] [-n nchars] [-d delim] [name ...]
One line is read from the standard input, or from the file
descriptor fd supplied as an argument to the -u option, and the first
word is assigned to the first name, the second word to the second name,
and so on, with leftover words and
their intervening separators assigned to the last name. If there
are fewer words read from the input stream than names, the remaining
names are assigned empty values. The characters in IFS are used to
split the line into words. The backslash character (\) may be
used to remove any special meaning for the next character read and
for line continuation. Options, if supplied, have the following
meanings:
-a aname
The words are assigned to sequential indices of the array variable
aname, starting at 0. aname is unset before any
new values are assigned. Other name arguments are ignored.
-d delim
The first character of delim is used to terminate the input line, rather than newline.
-e If the standard input is coming from a terminal, readline (see READLINE above) is used to obtain the line.
-n nchars
read returns after reading nchars characters rather than waiting for a complete line of input.
-p prompt
Display prompt on standard error, without a trailing newline,
before attempting to read any input. The prompt is displayed only if
input is coming from a terminal.
-r Backslash does not act as an escape character. The backslash
is considered to be part of the
line. In particular, a backslash-newline pair may not be used as a
line continuation.
-s Silent mode. If input is coming from a terminal, characters are not echoed.
-t timeout
Cause read to time out and return failure if a complete line of
input is not read within timeout seconds. This
option has no effect if read is not reading input from the terminal
or a pipe.
-u fd Read input from file descriptor fd.
If no names are supplied, the line read is assigned to the
ariable REPLY. The return code is zero, unless end-of-file is
ncountered, read times out, or an invalid file descriptor is
supplied as the argument to -u.
zj@zj:~$read-p "how old r y?" age
how old r y?10
zj@zj:~$ echo $age
10
-p没什么.
zj@zj:~$read-p "some world?"-a words
some world?hello zj ubuntuer
zj@zj:~$ echo ${words[1]}
zj
zj@zj:~$ echo ${words[0]}
hello
-a 就是把输入赋给数组.
