Run the following C programming code and explain in detail how the program works with the topic of I/O and UNIX I/O Programming.

*Include screenshots of program execution

#include
#include
#include
#include
#include
#include
#define FILE "76-os192-demo.txt"

void main(void) {
printf("See %s", FILE);
printf ("OUT=%d", STDOUT_FILENO);
close(STDOUT_FILENO);
int fd1 = open (FILE, O_RDWR |
O_CREAT | O_TRUNC, 0644);
int fd2 = dup2(fd1, 9);
printf( "A");
fprintf(stdout, "B");
dprintf(fd2, "fd1=%dfd2=%d",
fd1, fd2);
}

 

Transcribed Image Text:

#include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #define FILE "76-os 192-demo.txt" void main(void) { } printf ("See %s\n", FILE); printf ("OUT=%d\n", STDOUT_FILENO); close (STDOUT_FILENO); int fd1 = open (FILE, O_RDWR | int fd2 printf( = O_CREAT | O_TRUNC, 0644); dup2 (fd1, 9); fprintf(stdout, dprintf(fd2, "A\n"); "B\n"); "fd1-%d\nfd2=%d\n", fd1, fd2); #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #define FILE "76-os 192-demo.txt" void main(void) { } printf ("See %s\n", FILE); printf ("OUT=%d\n", STDOUT_FILENO); close (STDOUT_FILENO); int fd1 = open (FILE, O_RDWR | int fd2 printf( = O_CREAT | O_TRUNC, 0644); dup2 (fd1, 9); fprintf(stdout, dprintf(fd2, "A\n"); "B\n"); "fd1-%d\nfd2=%d\n", fd1, fd2);

Answer rating: 100% (QA)

EXPLAINATION FD is for file descriptor define FILE 76os192demotxt File name is specified using it pr... View the full answer