char buffer [BUFSIZE]; int fd = open("fooey",0_WRONLY|O_CREAT|O_TRUNC,0777); strcpy(buffer, "First data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 90, SEEK_SET); strcpy(buffer, "Second data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 100, SEEK_END); strpcy (buffer, "Third data"); write(fd, buffer, strlen(buffer)); close(fd); a. What is the size of the file at the end of this section of code? b. Describe the contents of the file say exactly what byte offsets contain actual data, and what offsets constitute "holes". c. Why might holey files be useful? d. Suppose, after the above sequence of writes, the same program opens the file for reading and then does:

char buffer [BUFSIZE]; int fd = open("fooey",0_WRONLY|O_CREAT|O_TRUNC,0777); strcpy(buffer, "First data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 90, SEEK_SET); strcpy(buffer, "Second data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 100, SEEK_END); strpcy (buffer, "Third data"); write(fd, buffer, strlen(buffer)); close(fd); a. What is the size of the file at the end of this section of code? b. Describe the contents of the file say exactly what byte offsets contain actual data, and what offsets constitute "holes". c. Why might holey files be useful? d. Suppose, after the above sequence of writes, the same program opens the file for reading and then does:

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter3: Data Representation

Section: Chapter Questions

Problem 12VE

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