How can I check to see if a process is stopped from the command-line?

Question

I have the following form model:

public class Form {
    public string Field1;
    public string Field2;

    public Applicant PrimaryApplicant;
    public Applicant SecondaryApplicant;
}

public class Applicant {
    [Required(ErrorMessage = "Please enter a first name"), Display(Name = "First Name")]
    public string FirstName;
    [Required(ErrorMessage = "Please enter a last name"), Display(Name = "Last Name")]
    public string LastName;
}

The primary applicant is always required while second applicant is optional, unless any of it's fields is set.

I've tried implementing it using IValidatbleObject interface and Validate method but it doesn't work. (ModelState.IsValid was still returning false)

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        var validationResult = new List<ValidationResult>();

        foreach (var property in TypeDescriptor.GetProperties(this).Cast<PropertyDescriptor>())
        {
            Validator.TryValidateValue(property.GetValue(this), validationContext, validationResult, property.Attributes.OfType<ValidationAttribute>());
        }

        var validationCount = TypeDescriptor.GetProperties(this)
                                        .Cast<PropertyDescriptor>()
                                        .Count(p => p.Attributes.OfType<ValidationAttribute>().Any());

        if (!IsPrimaryApplicant && validationResult.Count() == validationCount) validationResult.Clear();

        return validationResult;
    }

How to do validation in this type of scenario?

Solution 1

You can check whether the process is in stopped state, T is ps output.

You can do:

[ "$(ps -o state= -p PID)" = T ] && kill -CONT PID

• [ "$(ps -o state= -p PID)" = T ] tests whether the output of ps -o state= -p PID is T, if so send SIGCONT to the process. Replace PID with the actual process ID of the process.

Solution 2

Another way would be

pid=1
status=`cat /proc/$pid/wchan`
if [ "$status" == "do_signal_stop" ] ; then
  echo "$pid sleeps: $status"
else
  echo "$pid does not sleep: $status"
fi

Comments

[Admin]

you say a program in the title, so you mean the name or you mean the PID like in the example?

[Admin]

Do you want to continue it in the foreground (grabbing the terminal) or in the background?