c - sigwait() repeatedly unblocked by SIGUSR1 -

I am writing a program that takes a list of UNIX commands from a file and executes them sequentially every To keep things in order, I must initialize each command and wait for sigwire () via SIGUSR1 . When each command gets initialized, then every command can execute.

Usage: & gt; Program.c input.txt

However, it seems that SIGUSR1 is called repeatedly, exceeding sigwait () . What's going on here? I have tried many different things, but recently it has been prepared later. To RFRA, I want to see the signal raised for the command immediately after the initialization. I want the signal to be unblocked when all commands start completely

  #include  0) {printf ("Run the hair process% d to execute the command% s", getpid (), program); // SIGUSR1 is now blocked and pending - this call will be sent to Sigwit / instant int sig; Favored Results = Sigvite (and Sigset, and SIG); If (result == 0) {printf ("execute child process% d command% s", getpid (), program); Execvp (command [0], command); }}} // has been launched for all programs (i = 0; i  

Update: Trying to change sigaction () from signal () . no changes.

You should consider checking the sigwait after calling to see if the PID There is a hair procedure

then maybe put

int sig;

and

int results = sigwait (& sigset, & amp; sig);

If one checks within the statement that pid == 0 which will indicate that it is a child otherwise you will sign a basic process.

If pid is greater than 0 then this is a basic process ID and if it is less than zero, then there is an error.

Then in each process you will kill the array of your pids (pid_array [i], SIGUSR1) to unblock it.