Consider the two programs given below to implement the command (ignore the fact that error checks are not done on return values of functions)
$ ls . /tmp/asdfksdf /tmp/ddd 2&1
Program 1
int main(int argc, char *argv[]) {
    int fd, n, i;
    char buf[128];

    fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
    close(1);
    dup(fd);
    close(2);
    dup(fd);
    execl("/bin/ls", "/bin/ls", ".", "/tmp/asldjfaldfs", NULL);
}

Program 2
int main(int argc, char *argv[]) {
    int fd, n, i;
    char buf[128];

    close(1);
    fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
    close(2);
    fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
    execl("/bin/ls", "/bin/ls", ".", "/tmp/asldjfaldfs", NULL);
}
Select all the correct statements about the programs

Question

Consider the two programs given below to implement the command (ignore the fact that error checks are not done on return values of functions) 
 $ ls . /tmp/asdfksdf >/tmp/ddd 2>&1 
 Program 1 
 int main(int argc, char *argv[]) { 
     int fd, n, i; 
     char buf[128]; 
 
     fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR); 
     close(1); 
     dup(fd); 
     close(2); 
     dup(fd); 
     execl("/bin/ls", "/bin/ls", ".", "/tmp/asldjfaldfs", NULL); 
 }

Program 2 
 int main(int argc, char *argv[]) { 
     int fd, n, i; 
     char buf[128]; 
 
     close(1); 
     fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR); 
     close(2); 
     fd = open("/tmp/ddd", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR); 
     execl("/bin/ls", "/bin/ls", ".", "/tmp/asldjfaldfs", NULL); 
 } 
 Select all the correct statements about the programs

Accepted Answer

Program 1 makes sure that there is one file offset used for '2' and '1'

Accepted Answer

Only Program 1 is correct

Answer

Program 2 makes sure that there is one file offset used for '2' and '1'

Answer

Program 2 does 1>&2

Answer

Only Program 2 is correct

Answer

Program 1 does 1>&2

Answer

Program 1  ensures 2>&1 and does not ensure  > /tmp/ddd

Answer

Both programs are correct

Answer

Program 1 is correct for > /tmp/ddd but not for 2>&1

Answer

Both program 1 and 2 are incorrect

Answer

Program 2 is correct for > /tmp/ddd but not for 2>&1

Answer

Program 2  ensures 2>&1 and does  not ensure  > /tmp/ddd

Crowdly

Consider the two programs given below to implement the command (ignore the fact ...

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