Skip to content

basic-cygwin

Directory actions

More options

Directory actions

More options

Latest commit

 

History

History

basic-cygwin

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
src/main/java/example
src/main/java/example
 
 
README.md
README.md
 
 
pom.xml
pom.xml
 
 

README.md

Info

Invoking cygwin commands on Windows host from Java Runtime.getRuntime().exec(command).

Usage

Legacy Argument Procesing

  • build
mvn package
  • run via CLASSPATH:
java -cp target\example.cygwin.jar;target\lib\* example.App -command ls -arguments /var/log -debug

this outputs

command: ls
arguments: /var/log
args: []
All optons:
ls
/var/log
null
Listing the dirs: /var/log
<OUTPUT>lastlog
setup.log
setup.log.full
sshd.log
</OUTPUT>
Done: ls /var/log

java -cp target\example.cygwin.jar;target\lib\* example.App -command ls -arguments /var/log -debug -bash

this outputs

command: ls
arguments: /var/log
args: []
All optons:
ls
/var/log
null
null
Listing the dirs: /var/log
<OUTPUT>lastlog
setup.log
setup.log.full
sshd.log






</OUTPUT>
Done: ls /var/log

This matches the output of the

$ ls -1 /var/log/

command run from Cygwin:

lastlog
setup.log
setup.log.full
sshd.log
  • try non existent dir, to trigger error:
java -cp target\example.cygwin.jar;target\lib\* example.App -c ls -a /baddir
Listing the dirs: [/baddir]
Running the command: c:\cygwin\bin\bash.exe -c "/bin/ls -Q $0 $1 $2 $3 $4 $5 $6
 $7 $8 $9" /baddir
Process exit code: 2
<ERROR>/bin/ls: cannot access "/baddir": No such file or directory</ERROR>
  • test on linux:
mvn package
java -cp target/example.cygwin.jar:target/lib/* example.App $(pwd)

this produces

Listing the dirs: [/home/sergueik/src/selenium_java/basic-cygwin]
Running the command: ls -Q /home/sergueik/src/selenium_java/basic-cygwin
<OUTPUT>pom.xml
README.md
src
target</OUTPUT>

New Argument Processing

  • in version 0.2.0-SNAPSHOT introduced arguments parser. The invocation becomes:
java -cp target/example.cygwin.jar:target/lib/* example.App -command ls -arguments $(pwd)

this outputs

Listing the dirs: [/home/sergueik/src/selenium_java/basic-cygwin]
Running the command: ls /home/sergueik/src/selenium_java/basic-cygwin
<OUTPUT>pom.xml
README.md
repo
src
target
</OUTPUT>

also, controls options to be provided:

java -cp target/example.cygwin.jar:target/lib/* example.App -arguments $(pwd)

complains with

Missing required argument: command

and quote is now an optional argument:

java -cp target/example.cygwin.jar:target/lib/* example.App -command ls -arguments $(pwd) -quote
Listing the dirs: [/home/sergueik/src/selenium_java/basic-cygwin]
Running the command: ls -Q /home/sergueik/src/selenium_java/basic-cygwin
<OUTPUT>pom.xml
README.md
repo
src
target
</OUTPUT>

one can pass multiple dirs separated by commans via -arguments:

java -cp target/example.cygwin.jar:target/lib/* example.App -command ls -arguments $(pwd),/tmp -quote

To list regular Windows directories, use cygwin paths like

java -cp target\example.cygwin.jar;target\lib\* example.App -c ls -a /cygdrive/c/Users/sergueik/Desktop

On cygwin there is also a "bash" flag:

java -cp target\example.cygwin.jar;target\lib\* example.App -a /var/l*g -c ls -b

this results in

Running the command: c:\cygwin\bin\bash.exe -c "/bin/ls $0 $1 $2 $3 $4 $5 $6 $
7 $8 $9" /var/l*g
<OUTPUT>lastlog
setup.log
setup.log.full
sshd.log






</OUTPUT>

while without the flag

java -cp target\example.cygwin.jar;target\lib\* example.App -a /var/l*g -c ls

the arguments are passed to ls.exe:

Running the command: c:\cygwin\bin\ls.exe /var/l*g
<OUTPUT>lastlog
setup.log
setup.log.full
sshd.log
</OUTPUT>

Run General Command, Python Script From Java

print(123)

pass the path to the script as arguments argument:

java -cp target\example.cygwin.jar;target\lib\* example.App -c c:\Python381\python.exe -a "%CD%\test.py" -d
<OUTPUT>123
</OUTPUT>

Done: c:\Python381\python.exe c:\developer\sergueik\selenium_java\basic-cygwin\test.py

NOTE: trouble passing inline commands

java -cp target\example.cygwin.jar;target\lib\* example.App --command "c:\Python381\python.exe" --arguments "-c ""print 123"""
Aborting after exception org.apache.commons.cli.MissingArgumentException: Missing argument for option: a

"c:\Python381\python.exe" -c "print( 123)"
123

See Also (incorrect exaple disussion)[https://qna.habr.com/q/1098350]

Notes

One can override the default path to cygwin via

set CYGWIN_HOME=c:\cygwin

See Also

Author

Serguei Kouzmine