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Index | Description | Usage | Options | Variables | Hints | Bulletproof
interact
[flags] - summary
of options
complete
description
| Flags |
Description |
| -echo |
Sends
characters that match the following pattern back to the process that generated
them as each character is read. This may be useful when the user
needs to see feedback from partially typed patterns. |
| -ex |
May
be used to protect patterns that might otherwise match interact flags from
doing so. Any pattern beginning with a “-“ should be protected this
way. (All strings starting with “-“ are reserved for future options.) |
| -i
spawn_id |
Introduces
a replacement for the current spawn_id when no other -input or -output
flags are used. |
| -input |
Input
for a group of output spawn ids may be determined by a spawn id list prefaced
by a -input flag. |
| -iwrite |
Prefacing
a pattern with the flag -iwrite causes the variable interact_out(spawn_id)
to be set to the spawn_id which matched the pattern (or eof). |
| -nobuffer |
Sends
characters that match the following pattern on to the output process as
characters are read. This is useful when you wish to let a program
echo back the pattern. For example, the following might be used to
monitor where a person is dialing (a Hayes-style modem). Each time
“atd” is seen the script logs the rest of the line. |
| -o |
Causes
any following key-body pairs to be applied to the output of the current
process. This can be useful, for example, when dealing with hosts
that send unwanted characters during a telnet session. |
| -output |
To
send output to multiple processes, list each spawn id list prefaced by
a -output flag |
| -re |
Forces
the string to be interpreted as a regexp-style pattern. In this case,
matching sub-strings are stored in the variable interact_out similarly
to the way expect stores its output in the variable expect_out. The
-indices flag is similarly supported. |
| -reset |
Resets
the terminal to the mode it had before interact was executed (invariably,
cooked mode). Note that characters entered when the mode is being
switched may be lost (an unfortunate feature of the terminal driver on
some systems). The only reason to use -reset is if your action depends
on running in cooked mode. |
| -u |
Makes
interact look for the user as the process named by its argument (which
must be a spawned id). |
Gives control of the current
process to the user, so that keystrokes are sent to the current process,
and the stdout and stderr of the current process are returned.
complete
description
This material is excerpted
from the O'Reilly book "Exploring Expect" by Don Libes, and can also be
found in the manpage on many UNIX platforms.
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