The below command works fine when i run it from unix box, but when I execute it from a tcl script its not working. please help me how to execute the command.
java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml
I have tried the following lines of code
exec "java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml"
eval "java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml"
Use separate arguments.
exec java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml
I'm not sure if exec looks in the path, so it is better do do the following:
exec {*}[auto_execok java] diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml
Or if you are on 8.4 (which is end of life by the way)
eval [linsert {exec diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml} 1 [auto_execok java]]
exec most certainly does use the path.There are three ways to do it:
exec java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml
No quotes; each Tcl word becomes a separate argument.
set command "java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml"
exec {*}$command
# or in 8.4 and before, one of these:
# eval exec $command
# eval [list exec] [lrange $command 0 end]
# eval [linsert $command 0 exec]
Or, if you prefer shell syntax to Tcl syntax:
set command "java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml"
exec /bin/sh -c $command
This last one is very useful when you need to do complex redirections; they're currently easier to do in the Bourne shell (and its derivatives) than in Tcl. It (probably) won't work on Windows though; the equivalent with firing stuff through CMD.EXE is unfortunately a bit horrible.
cmd.exe /c ... or even cmd.exe /c start {} ...
java, use e.g.exec sh -c "java -jar diffkit-0.9.0/diffkit-app.jar -planfiles plan.xml", otherwise see Johannes answer.