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pxssh - Output not returning correctly with certain length command
When using pxssh from pexpect (Python 3-v4.6.0, Python 2-v4.2.1) to execute a command, the output of the command is not returned, only the command itself along with a control character (example below).
This only occurs when using a command with a particular length, for example when setting the window size to 200, a command of length 189 character will trigger this behaviour, for a window size of 300, a 246 character command etc.
Example code with respective outputs:
Setup:
from pexpect import pxssh
conn = pxssh.pxssh()
conn.login(host, user, password)
conn.setwinsize(500, 200)
conn.setecho(False)
conn.sendline('')
conn.prompt(1)
conn.prompt(1)
Correct Expected Output:
conn.sendline('l'*188)
conn.prompt(1)
conn.before
b'llll**snip**lllllx1b[Klrn-sh: lllll*snip*lllll: command not foundrn'
Incorrect Output:
conn.sendline('l'*189)
conn.prompt(1)
conn.before
b'lllll**snip**lllllrx1b[A'
Correct Expected Output:
conn.sendline('l'*190)
conn.prompt(1)
conn.before
b'lllll**snip**llllllx1b[Klrn-sh: lllll**snip**llllll: command not foundrn'
Does anyone know what might be causing this?
python pxssh
asked Jan 2 at 14:21
MABMAB
12
add a comment |
When using pxssh from pexpect (Python 3-v4.6.0, Python 2-v4.2.1) to execute a command, the output of the command is not returned, only the command itself along with a control character (example below).
This only occurs when using a command with a particular length, for example when setting the window size to 200, a command of length 189 character will trigger this behaviour, for a window size of 300, a 246 character command etc.
Example code with respective outputs:
Setup:
from pexpect import pxssh
conn = pxssh.pxssh()
conn.login(host, user, password)
conn.setwinsize(500, 200)
conn.setecho(False)
conn.sendline('')
conn.prompt(1)
conn.prompt(1)
Correct Expected Output:
conn.sendline('l'*188)
conn.prompt(1)
conn.before
b'llll**snip**lllllx1b[Klrn-sh: lllll*snip*lllll: command not foundrn'
Incorrect Output:
conn.sendline('l'*189)
conn.prompt(1)
conn.before
b'lllll**snip**lllllrx1b[A'
Correct Expected Output:
conn.sendline('l'*190)
conn.prompt(1)
conn.before
b'lllll**snip**llllllx1b[Klrn-sh: lllll**snip**llllll: command not foundrn'
Does anyone know what might be causing this?
python pxssh
asked Jan 2 at 14:21
MABMAB
12
add a comment |
When using pxssh from pexpect (Python 3-v4.6.0, Python 2-v4.2.1) to execute a command, the output of the command is not returned, only the command itself along with a control character (example below).
This only occurs when using a command with a particular length, for example when setting the window size to 200, a command of length 189 character will trigger this behaviour, for a window size of 300, a 246 character command etc.
Example code with respective outputs:
Setup:
from pexpect import pxssh
conn = pxssh.pxssh()
conn.login(host, user, password)
conn.setwinsize(500, 200)
conn.setecho(False)
conn.sendline('')
conn.prompt(1)
conn.prompt(1)
Correct Expected Output:
conn.sendline('l'*188)
conn.prompt(1)
conn.before
b'llll**snip**lllllx1b[Klrn-sh: lllll*snip*lllll: command not foundrn'
Incorrect Output:
conn.sendline('l'*189)
conn.prompt(1)
conn.before
b'lllll**snip**lllllrx1b[A'
Correct Expected Output:
conn.sendline('l'*190)
conn.prompt(1)
conn.before
b'lllll**snip**llllllx1b[Klrn-sh: lllll**snip**llllll: command not foundrn'
Does anyone know what might be causing this?
python pxssh
asked Jan 2 at 14:21
MABMAB
12
When using pxssh from pexpect (Python 3-v4.6.0, Python 2-v4.2.1) to execute a command, the output of the command is not returned, only the command itself along with a control character (example below).
This only occurs when using a command with a particular length, for example when setting the window size to 200, a command of length 189 character will trigger this behaviour, for a window size of 300, a 246 character command etc.
Example code with respective outputs:
Setup:
from pexpect import pxssh
conn = pxssh.pxssh()
conn.login(host, user, password)
conn.setwinsize(500, 200)
conn.setecho(False)
conn.sendline('')
conn.prompt(1)
conn.prompt(1)
Correct Expected Output:
conn.sendline('l'*188)
conn.prompt(1)
conn.before
b'llll**snip**lllllx1b[Klrn-sh: lllll*snip*lllll: command not foundrn'
Incorrect Output:
conn.sendline('l'*189)
conn.prompt(1)
conn.before
b'lllll**snip**lllllrx1b[A'
Correct Expected Output:
conn.sendline('l'*190)
conn.prompt(1)
conn.before
b'lllll**snip**llllllx1b[Klrn-sh: lllll**snip**llllll: command not foundrn'
Does anyone know what might be causing this?
python pxssh
python pxssh
asked Jan 2 at 14:21
MABMAB
12
asked Jan 2 at 14:21
MABMAB
12
asked Jan 2 at 14:21
MABMAB
12
asked Jan 2 at 14:21
MABMAB
12
asked Jan 2 at 14:21
MABMAB
12
12
add a comment |
add a comment |
1 Answer
1
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oldest
votes
In case anyone comes across this problem in the future. This issue occurs when a command of length = window size - length of prompt, which causes an additional prompt to incorrectly be inserted into the incoming data in turn causing the output to be incorrectly returned.
For more information see: https://github.com/pexpect/pexpect/issues/552
answered Jan 28 at 16:51
MABMAB
12
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In case anyone comes across this problem in the future. This issue occurs when a command of length = window size - length of prompt, which causes an additional prompt to incorrectly be inserted into the incoming data in turn causing the output to be incorrectly returned.
For more information see: https://github.com/pexpect/pexpect/issues/552
answered Jan 28 at 16:51
MABMAB
12
add a comment |
In case anyone comes across this problem in the future. This issue occurs when a command of length = window size - length of prompt, which causes an additional prompt to incorrectly be inserted into the incoming data in turn causing the output to be incorrectly returned.
For more information see: https://github.com/pexpect/pexpect/issues/552
answered Jan 28 at 16:51
MABMAB
12
add a comment |
In case anyone comes across this problem in the future. This issue occurs when a command of length = window size - length of prompt, which causes an additional prompt to incorrectly be inserted into the incoming data in turn causing the output to be incorrectly returned.
For more information see: https://github.com/pexpect/pexpect/issues/552
answered Jan 28 at 16:51
MABMAB
12
In case anyone comes across this problem in the future. This issue occurs when a command of length = window size - length of prompt, which causes an additional prompt to incorrectly be inserted into the incoming data in turn causing the output to be incorrectly returned.
For more information see: https://github.com/pexpect/pexpect/issues/552
answered Jan 28 at 16:51
MABMAB
12
answered Jan 28 at 16:51
MABMAB
12
answered Jan 28 at 16:51
MABMAB
12
answered Jan 28 at 16:51
MABMAB
12
12
add a comment |
add a comment |
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