Suppose we have a program that calls two functions do_f1() and do_f2() in that order. a. After calling do_f1(), it sends SIGSUR1 signal to its parent.
b. Before calling do_f2 (), it waits for SIGUSR2 signal, which will be sent from another process, so don't worry about who sends the signal SIGUSR2.
You are asked to implement this program and use sigsuspend() to wait for a signal.
// all the necessary libraries are included
do f1() { /* ... */ } /* Suppose these functions are already */
do_f2() { /* ... */} /* implemented for you. So, just use them */
static int sigreceived = 0;
void my_sig_handler (int signo) {
sigreceived = 1;
}
void main() {
struct sigaction act;
sigset_t blockmask, sigmask;
do f1() ;
/* (a) show how to send SIGUSR1 to the parent process */
/* (b) show how to set up the necessary structures and masks and then wait for SIGUSR2 using sigsuspent() */
do_f2();
}
}

we can all learn from our past mistakes because we all have different ways of learning different types of techniques. my way may or may not another classmate remember and have the repetition to acknowledge such standard. such as remembering acronyms. using abbreviations to us remember keep things in order in our memory. this us figure out what comes next in the sequence. if so, what we have is a sentence of just letters all in caps. we either know the meaning or have no idea what it stands for. most of the time we know the meaning and context. but most of us who don't know, should learn by having a quick glance at what needs to be remembered. such as repetition in the memory for acronyms. one way that me, is the fact that i'm always doing math and english assignments. so we have to remember specific meanings such as soapstone for documents, such as citing correctly. or pemdas for doing the equations correctly, even if it's the super long way. this works for everyone. you just have to find what works for you by practicing and repetition daily.

i would first let him be aware that a cover letter is official and confidential and it requires a proper formatting so that the employer doesn't have hard time when going through it. he should write it in paragraphs of about two to four sentences and use proper grammar a , spelling and proper punctuation. i will also advice him not to be emotional and not also to use images.then base his attention to the details of the job described and not other things. that is he be specific to the responsibilities and to the employers requirements. on this he should make sure that the letter reflects how good he is for the requirements detailed by the employer

the letter should not be too long nor too short.