60 lines
1.2 KiB
V
60 lines
1.2 KiB
V
module main
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import os
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// a test where we execute a bash script but work around where we put script in bash inside bash
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fn exec(path string, redirect bool) {
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mut line := ''
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mut line_err := ''
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mut cmd := os.new_process('/bin/bash')
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if redirect {
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cmd.set_args(['-c', '/bin/bash /tmp/test.sh 2>&1'])
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} else {
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cmd.set_args([path])
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}
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cmd.set_redirect_stdio()
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cmd.run()
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if cmd.is_alive() {
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for {
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line = cmd.stdout_read()
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println('STDOUT: $line')
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if !redirect {
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line_err = cmd.stderr_read()
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println('STDERR: $line_err')
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}
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if !cmd.is_alive() {
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break
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}
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}
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}
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if cmd.code > 0 {
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println('ERROR:')
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println(cmd)
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// println(cmd.stderr_read())
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}
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}
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fn main() {
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script := '
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echo line 1
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#will use some stderr now
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echo redirect 1 to 2 1>&2
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echo line 3
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'
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os.write_file('/tmp/test.sh', script) or { panic(err) }
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// os.chmod("/tmp/test.sh",0o700) //make executable
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// this will work because stderr/stdout are smaller than 4096 chars, once larger there can be deadlocks
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// in other words this can never work reliably without being able to check if there is data on stderr or stdout
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exec('/tmp/test.sh', false)
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// this will always work
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exec('/tmp/test.sh', true)
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}
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