Newbie: how to temporary results and handle sessions running UNIX commands?

Hello,
I have just asked a question concerning launching UNIX commands using Java classes, see thread "_https://forums.oracle.com/forums/thread.jspa?threadID=2429211&tstart=0_".
I have followed the mentioned advises (using "bash","-c" parameters) but now I have stumbled into other issues:
My intention is to write a UNIX class, that can handle UNIX commands, in order to be used in other Java programs, so that the following example becomes possible:
UNIX.launch("cd /var/core");
UNIX.launch("rm obsolete_core_file");
UNIX.launch("sqlplus <Oracle_database>");
UNIX.launch("select * from cat;");Unfortunately I have stumbled into a strange behaviour: until now, I have created the UNIX class as a single class, containing a "main" method. When I launch the following commands:
java UNIX "cd /var/core";
java UNIX "rm obsolete_core_file"I have the problem that the "cd /var/core" command is executed while UNIX class is running, but afterwards I jump back to my current directory:
pwd => current directory
java UNIX "cd /var/core" (this is executed, e.g. verifying "ls" output)
pwd => current directoryI would like to have:
pwd => current directory
java UNIX "cd /var/core"
pwd => /var/coreOne other thing is the handling of sessions: until now, when I launch following commands:
UNIX.launch("sqlplus <Oracle_database>");
UNIX.launch("select * from cat;");Then I get into a "sqlplus" session, but afterwards my Telnet session hangs. Is there a way to see that I have fallen into a session, and handle it? (Exit, launch internal session (SQL-plus) command, ...)
Thanks again
Dominique

scampsd wrote:
Hello,
I have just asked a question concerning launching UNIX commands using Java classes, see thread "_https://forums.oracle.com/forums/thread.jspa?threadID=2429211&tstart=0_".
I have followed the mentioned advises (using "bash","-c" parameters) but now I have stumbled into other issues:
My intention is to write a UNIX class, that can handle UNIX commands, in order to be used in other Java programs, so that the following example becomes possible:
UNIX.launch("cd /var/core");
UNIX.launch("rm obsolete_core_file");
UNIX.launch("sqlplus <Oracle_database>");
UNIX.launch("select * from cat;");Unfortunately I have stumbled into a strange behaviour: until now, I have created the UNIX class as a single class, containing a "main" method. When I launch the following commands:
java UNIX "cd /var/core";
java UNIX "rm obsolete_core_file"I have the problem that the "cd /var/core" command is executed while UNIX class is running, but afterwards I jump back to my current directory:
pwd => current directory
java UNIX "cd /var/core" (this is executed, e.g. verifying "ls" output)
pwd => current directoryI would like to have:
pwd => current directory
java UNIX "cd /var/core"
pwd => /var/coreOne other thing is the handling of sessions: until now, when I launch following commands:
UNIX.launch("sqlplus <Oracle_database>");
UNIX.launch("select * from cat;");Then I get into a "sqlplus" session, but afterwards my Telnet session hangs. Is there a way to see that I have fallen into a session, and handle it? (Exit, launch internal session (SQL-plus) command, ...)
Thanks again
DominiqueWhy not just use plain java File I/O http://docs.oracle.com/javase/tutorial/essential/io/fileio.html and JDBC http://docs.oracle.com/javase/tutorial/jdbc/basics/processingsqlstatements.html for fulfilling your requirements?
Edited by: maheshguruswamy on Aug 20, 2012 10:32 AM

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