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Full Discussion: script to monitor directory
Top Forums Shell Programming and Scripting script to monitor directory Post 302226998 by nulinux on Wednesday 20th of August 2008 11:06:20 AM
Old 08-20-2008
script to monitor directory
What is the best way for a script to run to monitor a directory for the presence of files and then perform a function afterwords? I was hoping to have it continually run and sleep until it detects that files are present in the directory, then break out of the loop and go on to the next step.

What it does it waits for files to be transferred to it's local directory, then when the files are present it sftp's them out to another host. I already have the sftp script working just need the proper syntax for a loop to go to sleep until it detects the files in the directory. Also the file names and conventions will constantly change so I was hoping more for a 0 byte count compared to anything else besides a 0 byte count for a condition.This is a linux box using bash as the shell.

thanks in advance guys.
Last edited by nulinux; 08-20-2008 at 12:20 PM..
 

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LEARN ABOUT OSX

sftp-server

SFTP-SERVER(8)						    BSD System Manager's Manual 					    SFTP-SERVER(8)

NAME

     sftp-server -- SFTP server subsystem

SYNOPSIS

     sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level] [-u umask]

DESCRIPTION

     sftp-server is a program that speaks the server side of SFTP protocol to stdout and expects client requests from stdin.  sftp-server is not
     intended to be called directly, but from sshd(8) using the Subsystem option.

     Command-line flags to sftp-server should be specified in the Subsystem declaration.  See sshd_config(5) for more information.

     Valid options are:

     -d start_directory
	     specifies an alternate starting directory for users.  The pathname may contain the following tokens that are expanded at runtime: %%
	     is replaced by a literal '%', %h is replaced by the home directory of the user being authenticated, and %u is replaced by the user-
	     name of that user.  The default is to use the user's home directory.  This option is useful in conjunction with the sshd_config(5)
	     ChrootDirectory option.

     -e      Causes sftp-server to print logging information to stderr instead of syslog for debugging.

     -f log_facility
	     Specifies the facility code that is used when logging messages from sftp-server.  The possible values are: DAEMON, USER, AUTH,
	     LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.  The default is AUTH.

     -h      Displays sftp-server usage information.

     -l log_level
	     Specifies which messages will be logged by sftp-server.  The possible values are: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1,
	     DEBUG2, and DEBUG3.  INFO and VERBOSE log transactions that sftp-server performs on behalf of the client.	DEBUG and DEBUG1 are
	     equivalent.  DEBUG2 and DEBUG3 each specify higher levels of debugging output.  The default is ERROR.

     -R      Places this instance of sftp-server into a read-only mode.  Attempts to open files for writing, as well as other operations that
	     change the state of the filesystem, will be denied.

     -u umask
	     Sets an explicit umask(2) to be applied to newly-created files and directories, instead of the user's default mask.

     For logging to work, sftp-server must be able to access /dev/log.	Use of sftp-server in a chroot configuration therefore requires that
     syslogd(8) establish a logging socket inside the chroot directory.

SEE ALSO

     sftp(1), ssh(1), sshd_config(5), sshd(8)

     T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001, work in progress material.

HISTORY

     sftp-server first appeared in OpenBSD 2.8.

AUTHORS

     Markus Friedl <markus@openbsd.org>

BSD
								  January 4, 2013							       BSD
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