Ising C, write a program called buffer.c that uses no other function calls but calls to the system-cal ead and write and to the C library functions malloc, calloc, realloc, free and memcpy, vell as fprintf and strerror for error handling, and that does the following: • The tool buffer reads up everything it can read on its standard input, until it encounters an End-O File condition on that file descriptor. • While reading the input, the tool buffer stores the complete input in memory, which it dynamical allocates. • When it encounters End-Of-File on standard input, the tool buffer writes all it read in out to i standard output. The output is byte-per-byte the same as what the tool read on standard input. • The tool then shuts down, properly cleaning up all the dynamically allocated memory. It returns 0 a status code in this case.

Ising C, write a program called buffer.c that uses no other function calls but calls to the system-cal ead and write and to the C library functions malloc, calloc, realloc, free and memcpy, vell as fprintf and strerror for error handling, and that does the following: • The tool buffer reads up everything it can read on its standard input, until it encounters an End-O File condition on that file descriptor. • While reading the input, the tool buffer stores the complete input in memory, which it dynamical allocates. • When it encounters End-Of-File on standard input, the tool buffer writes all it read in out to i standard output. The output is byte-per-byte the same as what the tool read on standard input. • The tool then shuts down, properly cleaning up all the dynamically allocated memory. It returns 0 a status code in this case.

Name: Using C, write a program called buffer.c that uses no other function
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Description: Using C, write a program called buffer.c that uses no other function calls but calls to the system-callsread and write and to the C library functions malloc, calloc, realloc, free and memcpy, aswell as fprintf and strerror for error handling, and th

Database System Concepts

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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Question

Using C, write a program called buffer.c that uses no other function calls but calls to the system-calls
read and write and to the C library functions malloc, calloc, realloc, free and memcpy, as
well as fprintf and strerror for error handling, and that does the following:
• The tool buffer reads up everything it can read on its standard input, until it encounters an End-Of-
File condition on that file descriptor.
• While reading the input, the tool buffer stores the complete input in memory, which it dynamically
allocates.
• When it encounters End-Of-File on standard input, the tool buffer writes all it read in out to its
standard output. The output is byte-per-byte the same as what the tool read on standard input.
• The tool then shuts down, properly cleaning up all the dynamically allocated memory. It returns 0 as
a status code in this case.
When an error occurs with any of the system calls or memory management functions, the tool buffer
displays an appropriate error message on standard error, cleans up what it can clean up and returns 1 as a
status code.
Here are some examples of input and output:
$ echo "Hello World" | ./buffer
Hello World
$ . /buffer << EOF
Hello
How are you?
I am good!
EOF
Hello
How are you?
I am good!
$ 1s -lah ~ /Prostokvashino/part1. mkv
-rw-rw-r-- 1 lauter lauter 288M Aug 17
$ cat */Prostokvashino/part1.mkv | ./buffer | md5sum
2017 */Prostokvashino/part1.mkv
Oafa682d386240ff5c88459aec95613d
$ cat */Prostokvashino/part1.mkv | cat | md5sum
Oafa682d386240ff5c88459aec95613d

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