About
If command is specified, it replaces the shell. No new process is created. The shell terminates.
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Syntax
exec [-cl] [-a name] [command [arguments]]
where:
- -l the shell places a dash at the beginning of the zeroth arg passed to command. This is what login(1) does.
- -c option causes command to be executed with an empty environment.
- -a : the shell passes name as the zeroth argument to the executed command.
Return value
If command cannot be executed for some reason,
- a non-interactive shell will if the shell option execfail is:
- not enabled, exits,
- enabled, returns failure.
- an interactive shell returns failure if the file cannot be executed.
If command is not specified, any redirections take effect in the current shell, and the return status is 0. If there is a redirection error, the return status is 1.
With Ssh
The Ssh protocol permits to call an exec command.
Maven and ANT
An example of calling exec with Maven through Ant.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<id>scp</id>
<phase>install</phase>
<configuration>
<target>
<sshexec
host="${deploy-host}"
username="${deploy-username}"
password="${deploy-password}"
command="/export/myscript.sh"
trust="yes"
/>
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-jsch</artifactId>
<version>1.8.2</version>
</dependency>
</dependencies>
</plugin>