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spawn

spawn(command)

Run a command object asynchronously, returning the resulting Process object.

Examples

1. Run a command asynchronously:

   julia> cmd = run(`ls`)
   julia> p = spawn(cmd)
   Process(`ls`, ProcessRunning)

   This example creates a command object using the backticks syntax and runs it asynchronously using spawn. The resulting Process object is returned.

2. Capture the output of a command:

   julia> cmd = run(`echo "Hello, Julia!"`)
   julia> p = spawn(cmd)
   Process(`echo "Hello, Julia!"`, ProcessRunning)

   It runs a command that prints a message and captures the output by using spawn.

3. Check the status of a spawned process:

   julia> cmd = run(`sleep 5`)
   julia> p = spawn(cmd)
   Process(`sleep 5`, ProcessRunning)
   julia> isrunning(p)
   true

   This example demonstrates how to check if a Process object created by spawn is still running or not.

Common mistake example:

julia> cmd = run("ls")
julia> p = spawn(cmd)
ERROR: UndefVarError: spawn not defined

In this example, the spawn function is not defined because the Cmd object is created using a string instead of the backticks syntax. To use spawn, make sure to construct the command object correctly using backticks.

See Also

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