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Full Discussion: How to deal with incomplete image files
Top Forums UNIX for Dummies Questions & Answers How to deal with incomplete image files Post 302535035 by Shell_Life on Wednesday 29th of June 2011 12:00:28 PM
Old 06-29-2011
You have several options to solve your issue.

Here is one suggestion:

1) Change your FTP script as follows:
1.a) Before it starts to copy the images, it deletes a flag file (example: All_Done.txt) if it exists.
1.b) Copy all files to your directory.
1.c) The last step is to create the flag file in the same directory.

2) Write a script/program as follows:
2.a) If it sees the flag file in the directory:
2.a.I) Rename all FTP files to append a suffix to it (example: "cam0_view.jpg", "cam1_view.jpg").
2.a.II) Delete the flag file.

3) Change your html script to display the images from the "XXXX_view.jpg".

The only issue is the split milisecond that will take to rename the files to "view"
where the FTP could be trying to send the new files, otherwise, the above
is a safe procedure.

Hope it helps.
 

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LEARN ABOUT SUNOS

ftpconfig

ftpconfig(1M)						  System Administration Commands					     ftpconfig(1M)

NAME

       ftpconfig - set up anonymous FTP

SYNOPSIS

       ftpconfig [ftpdir]

       ftpconfig -d ftpdir

DESCRIPTION

       The ftpconfig script is executed by the super user to set up anonymous FTP. Anonymous FTP allows users to remotely log on to the FTP server
       by specifying the user name  ftp or anonymous and the user's email  address as password. The anonymous users  are  logged  on  to  the  FTP
       Server  and  given  access to a restricted file area with its own file system root. See chroot(2). The FTP area has  its own minimal system
       files.

       This command will copy and set up all the components needed to operate an anonymous FTP server, including creating the  ftp  user  account,
       creating  device  nodes,  copying  /usr/lib files, and copying timezone data.  The passwd and group files set up have been stripped down to
       prevent malicious users from finding login names on the server.	The anonymous file area will be placed	under  ftpdir.	If  the  ftp  user
       account already exists, then the current FTP area is used, and the system files in it are updated. All other files are left untouched. This
       command should be run to update the anonymous FTP area's configuration whenever a system patch is installed, or the system is upgraded.

OPTIONS

       -d	Create a new or update an existing ftpdir without creating or updating the ftp user account. Use this option when  creating  guest
		FTP user accounts.

OPERANDS

       The following operands are supported:

       ftpdir	The absolute pathname of the directory under which the anonymous FTP area is set up.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion

       1	Improper usage of the command

       2	Command failed

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWftpu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ftpaddhost(1M), in.ftpd(1M), useradd(1M), chroot(2), attributes(5)

SunOS 5.10							    1 May 2003							     ftpconfig(1M)
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