Question

What is wrong with the following code excerpt? int errno=0; if(close(fd)==-1) {perror("close error");} Select one: a. The condition will always be either true or false, so the if statement is not needed. b. The function close expects a FILE *, not a file descriptor. c. Errno is declared automatically, so you shouldn't declare it. d. The function perror should not be used because it is not safe from rentrancy.

          What is wrong with the following code excerpt?
int errno=0;
if(close(fd)==-1) {perror("close error");}
Select one:
a. The condition will always be either true or
false, so the if statement is not needed.
b. The function close expects a FILE *, not a file
descriptor.
c. Errno is declared automatically, so you
shouldn't declare it.
d. The function perror should not be used
because it is not safe from rentrancy.