09-10-2004
ssh not ending (sometimes) from inside a script, why?
Okay I have this script file that runs from cron and most the time it works just find. Except every so often one of the three ssh commands I have in it just doesn't know it's done and that of course causes the whole thing to hang!
The ssh command has executed. I can tell this because the command is as follows
ssh username@hostname "ls /somedirectory" >somedir.file
and a new somedir.file has been created on the machine running the cron script.
Also, when this happens I can use the "kill sshprocessid" command and the cron script will continue, fat dumb and happy!
I figure there is a race condition of some kind going on for the end of command signal and once in awhile it gets missed but.... I just don't know where else to look....
Any ideas???
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LEARN ABOUT X11R4
ssh-argv0
SSH-ARGV0(1) BSD General Commands Manual SSH-ARGV0(1)
NAME
ssh-argv0 -- replaces the old ssh command-name as hostname handling
SYNOPSIS
hostname | user@hostname [-l login_name] [command]
hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
[-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]
DESCRIPTION
ssh-argv0 replaces the old ssh command-name as hostname handling. If you link to this script with a hostname then executing the link is
equivalent to having executed ssh with that hostname as an argument. All other arguments are passed to ssh and will be processed normally.
OPTIONS
See ssh(1).
FILES
See ssh(1).
AUTHORS
OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen. Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH. Markus Friedl contributed the support for SSH
protocol versions 1.5 and 2.0. Jonathan Amery wrote this ssh-argv0 script and the associated documentation.
SEE ALSO
ssh(1)
Debian Project September 7, 2001 Debian Project