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Full Discussion: How can I send data to my C converter?
Top Forums Programming How can I send data to my C converter? Post 302598466 by ws6transam on Tuesday 14th of February 2012 02:02:56 PM
Old 02-14-2012
Thanks for the tip. However, as written, my C program called vdaqconv is still acting as if there is no argument being passed to it, and it defaults to the default directory and displays useage information. It then blows up with a 'terminated by signal 11' error, as no target file exists in the topmost directory. I *will* however, look into xargs more to see if there is an option that is required. I didn't know about xargs, since I'm still learning unix/linux.

edit--

Okay, I see what is going on with xargs. I used the --verbose switch and this was the output being fed to the converter:
First the input:
Quote:
msugws@dynamic-mackeyke-msu:~/Documents/Sample_data/SEY_subset> find . -name 'vdaq.txt'
./SEYSAM05/vdaq.txt
./SEYSAM02/vdaq.txt
./SEYSAM04/vdaq.txt
./SEYSAM01/vdaq.txt
./SEYSAM03/vdaq.txt
msugws@dynamic-mackeyke-msu:~/Documents/Sample_data/SEY_subset>
Next, the command with the --verbose enabled:
Quote:
msugws@dynamic-mackeyke-msu:~/Documents/Sample_data/SEY_subset> find . -name 'vdaq.txt' | xargs --verbose vdaqconv
vdaqconv ./SEYSAM05/vdaq.txt ./SEYSAM02/vdaq.txt ./SEYSAM04/vdaq.txt ./SEYSAM01/vdaq.txt ./SEYSAM03/vdaq.txt

Using default directory and default name vdaq.txt

VDAQ2SEIS Revision {26/JAN/2012} : D Burk, NERSP Engineer,

Usage: vdaq2seis [switches] vdaqfile

vdaqfile = vdaq.txt ascii file (input)
.
.
.
stuff cut here
.
.
.
The path is stored as './viseis.hdr'
Reading file 'vdaq.txt'
xargs: vdaqconv: terminated by signal 11
msugws@dynamic-mackeyke-msu:~/Documents/Sample_data/SEY_subset>
So apparently, the xargs is loading all of the lines into the command line argument separated with white space. Either I need to rework my converter to handle an arbitrary number of command line arguments (up to between one and two thousand), or else come up with an alternative method. Maybe I can use xargs with a temporary file: Dump the find data into a file, open the file, use it for the conversion, then delete the file. Maybe embed it all in a .ksh script or something.

--Gotta go, thanks for your help thus far. It's gotten me unstuck, anyway and thinking about options.
Last edited by ws6transam; 02-14-2012 at 03:26 PM..
 

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LEARN ABOUT HPUX

dtfilsys

dtfilsys(file formats)													    dtfilsys(file formats)

NAME

       dtfilsys -- CDE file system; directory tree structure

DESCRIPTION

       The  CDE  file system is divided into three parts: the root system, /usr/dt, the configuration directory, /etc/dt, and the temporary direc-
       tory, /var/dt. The root system, /usr/dt, is a read-only directory.  It contains all the files that comprise  the  CDE.	The  configuration
       directory,  /etc/dt,  is  the  directory  CDE  applications will search to locate configuration files that have been modified by the system
       administrator.  Default versions of these configuration files are typically located in /usr/dt. The temporary directory, /var/dt,  contains
       temporary information or information that varies in size and existence.	Below is a diagram of the directory tree structure for CDE.

	 /etc/dt/appconfig/appmanager/<Lang>
			  /help/<Lang>
			  /icons/<Lang>
			  /types/<Lang>
		/backdrops/<Lang>
		/config
		/palettes/<Lang>

	 /usr/dt/app-defaults/<Lang>
		/appconfig/appmanager/<Lang>
			  /help/<Lang>
			  /icons/<Lang>
			  /types/<Lang>
		/bin
		/config
		/lib
	       /share/backdrops/<Lang>
		     /include
		     /examples
		     /man
		     /palettes/<Lang>
	/var/dt/appconfig/appmanager

	$HOME/.dt/appmanager
		 /help
		 /icons
		 /palettes
		 /sessions
		 /types

       The following guidelines apply to the contents of these directories:

       /usr/dt	 This directory is for use by the CDE system.  Applications should never create files in this directory although they may read and
		 execute them.

       /usr/dt/app-defaults/<Lang>
		 This directory contains the localized versions of the app-defaults files for the CDE clients.

       /usr/dt/appconfig/appmanager/<Lang>
		 This directory contains the localized versions of the actions files used by the Application Manager.

       /usr/dt/appconfig/help/<Lang>
		 This directory contains the localized versions of the CDE help volumes and help files.

       /usr/dt/appconfig/icons/<Lang>
		 This directory contains the localized versions of the icons used by the CDE clients.

       /usr/dt/appconfig/types/<Lang>
		 This directory contains the localized versions of the actions and data types used by the CDE clients.

       /usr/dt/bin
		 This directory contains the CDE clients.

       /usr/dt/config
		 This directory contains default configuration files.

       /usr/dt/lib
		 This directory contains the shared libraries used by the CDE clients.

       /usr/dt/share
		 This directory contains CDE elements, typically ASCII files, that are independent of the architecture.

       /usr/dt/share/backdrops/<Lang>
		 This directory contains the localized versions of the backdrops used by the window manager workspaces and by the Style Manager.

       /usr/dt/share/examples
		 This directory contains examples of CDE functionality.

       /usr/dt/share/include
		 This directory is part of the developmewnt environment and includes header files associated with CDE.

       /usr/dt/share/man
		 This directory contains the man pages for the CDE clients.

       /usr/dt/share/palettes/<Lang>
		 This directory contains the localized versions of the palettes used by the Style Manager to determine the color scheme.

       /etc/dt	 This directory is specified as the CDE configuration directory.

       /etc/dt/appconfig
		 This directory is used to hold system-administrator defined configuration files

       /etc/dt/appconfig/appmanager/<Lang>
		 This directory is used to hold system-administrator defined configuration files for the Application Manager.

       /etc/dt/appconfig/help/<Lang>
		 This directory is used to hold system-administrator defined configuration files for the Help system.

       /etc/dt/appconfig/icons/<Lang>
		 This directory is used to hold system-administrator defined configuration files for icons.

       /etc/dt/appconfig/types/<Lang>
		 This directory is used to hold system-administrator defined configuration files for the action and filetype database.

       /etc/dt/backdrops/<Lang>
		 This directory contains backdrops provided by the system administrator.

       /etc/dt/config
		 This directory is to contain modified versions of the CDE configuration files (installed in /usr/dt/config).

       /etc/dt/palettes/<Lang>
		 This directory contains palettes provided by the system administrator.

       /var/dt	 This directory is used by CDE for some log files, temporary files, and files that vary in size.

       /var/dt/appconfig/appmanager
		 This directory is created at login and is used by the Application Manager.

       $HOME/.dt This directory contains information specific to the user.

       $HOME/.dt/appmanager
		 This directory is used to hold user-defined configuration files for the Application Manager.

       $HOME/.dt/backdrops
		 This directory is used to hold user-customized backdrops for the Style Manager.

       $HOME/.dt/help
		 This directory is used to hold user-defined configuration files for the Help system.

       $HOME/.dt/icons
		 This directory is used to hold user-defined configuration files for icons.

       $HOME/.dt/palettes
		 This directory is used to hold user-customized palettes for the Style Manager.

       $HOME/.dt/sessions
		 This directory is used to store session information between CDE sessions.

       $HOME/.dt/tmp
		 This directory is used to hold temporary information.

       $HOME/.dt/types
		 This directory is used to hold user-defined configuration files for the action and filetypes database.

   The Minimum Runtime Environment
       The minimum environment required for a system to support CDE consists of the following files and directories: /usr/dt/app-defaults/C/  tpad
       Dtksh  Dtterm  /usr/dt/appconfig/tttypes/  types.xdr /usr/dt/bin/ dsdm dtaction dtappgather dtappintegrate dtexec dtksh dtpad dtspcd dtterm
       suid_exec rpc.ttdbserver tt_type_comp ttsession

SEE ALSO

       dtenvvar(5)

															    dtfilsys(file formats)
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