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module os
// ProcessState.not_started - the process has not yet started
// ProcessState.running - the process is currently running
// ProcessState.stopped - the process was running, but was stopped temporarily
// ProcessState.exited - the process has finished/exited
// ProcessState.aborted - the process was terminated by a signal
// ProcessState.closed - the process resources like opened file descriptors were freed/discarded, final state.
pub enum ProcessState {
not_started
running
stopped
exited
aborted
closed
}
[heap]
pub struct Process {
pub:
filename string // the process's command file path
pub mut:
pid int // the PID of the process
code int = -1
// the exit code of the process, != -1 *only* when status is .exited *and* the process was not aborted
status ProcessState = .not_started
// the current status of the process
err string // if the process fails, contains the reason why
args []string // the arguments that the command takes
env_is_custom bool // true, when the environment was customized with .set_environment
env []string // the environment with which the process was started (list of 'var=val')
use_stdio_ctl bool // when true, then you can use p.stdin_write(), p.stdout_slurp() and p.stderr_slurp()
use_pgroup bool // when true, the process will create a new process group, enabling .signal_pgkill()
stdio_fd [3]int // the stdio file descriptors for the child process, used only by the nix implementation
wdata voidptr // the WProcess; used only by the windows implementation
}
// new_process - create a new process descriptor
// NB: new does NOT start the new process.
// That is done because you may want to customize it first,
// by calling different set_ methods on it.
// In order to start it, call p.run() or p.wait()
pub fn new_process(filename string) &Process {
return &Process{
filename: filename
stdio_fd: [-1, -1, -1]!
}
}
// set_args - set the arguments for the new process
pub fn (mut p Process) set_args(pargs []string) {
if p.status != .not_started {
return
}
p.args = pargs
return
}
// set_environment - set a custom environment variable mapping for the new process
pub fn (mut p Process) set_environment(envs map[string]string) {
if p.status != .not_started {
return
}
p.env_is_custom = true
p.env = []string{}
for k, v in envs {
p.env << '$k=$v'
}
return
}
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