advanced linux programming in c pdf

... Cleaning Up Children by Handling SIGCHLD #include #include #include #include sig_atomic_t child_exit_status; void clean_up_child_process (int signal_number) ... that contain the letter l (execl, execlp, and execle) accept the argument list using the C language’s varargs mechanism Functions that contain the letter e in their names (execve and execle) accept ... processes into an instance of the program you want to spawn Calling fork When a program calls fork, a duplicate process, called the child process, is created.The parent process continues executing...

Ngày tải lên: 26/01/2014, 07:20

... object files and linking For example, consider this code: % % % % gcc gcc gcc gcc -pg -pg -pg -pg -c -o calculator.o calculator .c -c -o stack.o stack .c -c -o number.o number .c calculator.o stack.o ... object files must be linked with ccmalloc’s library and the dynamic linking library Append -lccmalloc -ldl to your link command, for instance % gcc -g -Wall -pedantic malloc-use.o -o ccmalloc-use ... not contain valid symbols trying to find executable in current directory using symbols from ‘ccmalloc-use’ (to speed up this search specify ‘file ccmalloc-use’ in the startup file ‘.ccmalloc’)...

Ngày tải lên: 21/01/2014, 07:20

... floating-point math instruction Depending on how the CPU is configured, an invalid floating-point operation may return a special non-number value such as inf (in nity) or NaN (not a number) instead ... a process terminate.This is the default signal sent by the kill command SIGCHLD Linux sends a process this signal when a child process exits See Section 3.4.4, “Cleaning Up Children Asynchronously,” ... Asynchronously,” in Chapter 3, “Processes.” SIGXCPU Linux sends a process this signal when it exceeds the limit of CPU time that it can consume See Section 8.5, “getrlimit and setrlimit: Resource Limits,” in...

Ngày tải lên: 21/01/2014, 07:20

... reciprocal.o g++ $(CFLAGS) -o reciprocal main.o reciprocal.o main.o: main .c reciprocal.hpp gcc $(CFLAGS) -c main .c reciprocal.o: reciprocal.cpp reciprocal.hpp g++ $(CFLAGS) -c reciprocal.cpp clean: ... #include “reciprocal.hpp” int main (int argc, char **argv) { int i; i = atoi (argv[1]); printf (“The reciprocal of %d is %g\n”, i, reciprocal (i)); return 0; } Listing 1.2 (reciprocal.cpp) C+ + ... command prompt compiles the main .c source file: % gcc -c main .c The resulting object file is named main.o The C+ + compiler is called g++ Its operation is very similar to reciprocal.cpp is accomplished...

Ngày tải lên: 21/01/2014, 07:20

... the function get_cpu_clock_speed that reads from /proc/cpuinfo into memory and extracts the first CPU’s clock speed Listing 7.1 (clock-speed .c) Extract CPU Clock Speed from /proc/cpuinfo #include ... read 09 0430 CH07 5/22/01 10:30 AM Page 153 7.2 Listing 7.3 (print-arg-list .c) Print the Argument List of a Running Process #include #include #include #include #include #include ... determine where that executable actually is.The function get_executable_path in Listing 7.5 determines the path of the executable running in the calling process by examining the symbolic link /proc/self/exe...

Ngày tải lên: 26/01/2014, 07:20

... // octal, decimal, and hexadecimal code #include #include // Declaration of cin, cout // For manipulators being called // with arguments #include using namespace ... Output in fixed point notation scientific Output in scientific notation setprecision (int n) Sets the precision to n Methods for precision Manipulator Effects int precision (int n); int precision() ... cin >> ch; number = ch; // Read a character cout

Ngày tải lên: 06/07/2014, 17:21

... // Beginning // Function block // End DEFINING FUNCTIONS ■ 175 The following section describes how to program global functions Chapter 13, Defining Classes, describes the steps for defining member ... identifying objects you will need to define classes that describe these objects You can use available classes and functions to so In addition, you can make use of inheritance to create specialized classes ... compiler/linker settings for program compilation 174 ■ CHAPTER 10 ■ FUNCTIONS DEFINING FUNCTIONS Example of a function definition // func1.cpp #include using namespace std; void test( int, double...

Ngày tải lên: 06/07/2014, 17:21

... -// circle.cpp // Defines and calls the function circle() // -#include #include #include using namespace std; // Prototype of circle(): ... occurs, i.e., the function manipulates a local copy Thus, only a local copy of the string is changed in the function, but the string in the calling function remains unchanged Exercise // ... function strToUpper() is declared as a string& instead of a string? Exercise Write a void type function called circle()to calculate the circumference and area of a circle.The radius and two variables...

Ngày tải lên: 06/07/2014, 17:21

... of a class // account.h // Defining the class Account // #ifndef _ACCOUNT_ // Avoid multiple inclusions #define _ACCOUNT_ #include #include using namespace ... ■ CHAPTER 13 ■ DEFINING CLASSES DEFINING METHODS Methods of class Account // account.cpp // Defines methods init() and display() // #include "account.h" // Class definition ... comprises identifying and describing objects and recognizing their mutual relationships Object descriptions are the building blocks of classes In C+ +, a class is a user-defined type It contains...

Ngày tải lên: 06/07/2014, 17:21

... pointers to objects of class Account // #include "Account.h" // Includes , bool getAccount( Account *pAccount); // Prototype int main() { Account current1, ... pointer Example: Account savings("Mac, Rita",654321, 123.5); Account *ptrAccount = &savings; This defines the object savings and a pointer variable called ptrAccount The pointer ptrAccount is initialized ... DEFINING OBJECTS ■ 251 Defining a class also defines a new type for which variables, that is, objects, can be defined An object is also referred to as an instance of a class ᮀ Defining Objects...

Ngày tải lên: 06/07/2014, 17:21

... automatically become friend functions in the class containing the friend declaration This technique is useful if a class is used in such close conjunction with another class that all the methods in ... ControlPoint are friends Class ControlPoint #include Result.h class ControlPoint { private: string name; // Name of control point Result measure[100]; // Table with results // public: // Constructor ... range checking, the function runtime will increase considerably However, special permission to access the private data members of the class can dramatically improve the function’s response ᮀ Declaring...

Ngày tải lên: 06/07/2014, 17:21

... ■ CHAPTER 23 ■ INHERITANCE CONCEPT OF INHERITANCE Is relation Car Properties and capacities of class Car PassCar Truck Properties and capacities of class Properties and capacities of class Car ... shows a schematic definition of a derived class, C The C class inherits the B class, which is defined in the public section following the colon The private and public sections contain additional ... public members additionally defined in the derived class 506 ■ CHAPTER 23 ■ INHERITANCE MEMBER ACCESS Accessing members of base class Car class Car { private: long nr; string producer; public:...

Ngày tải lên: 06/07/2014, 17:21

... superior technology combined with century’s old traditions of providing health care Sleek Hospital has various categories of rooms which include General Ward, Double Sharing Room, Single Room, ... biggest hindrance to achieve their target is because of poor bed management Consider the situation where all the patients in ICU units need continuous, intensive and specialist nursing However, ... a facility of a dietician who plans the diet based on the therapeutic needs of the patients The other facilities include Guest Dining, House Keeping, Security, Gym, Transport and Wellness Centre...

Ngày tải lên: 02/08/2014, 10:20

... d) interact with the operating system Which of the following is a correct statement to declare the class “MyClass”? a) Class myclass c) class MyClass b) class Myclass d) Class MyClass Which of ... class Object{ static void main(){} public static Main(){} } } e) class Object{ b) class Object{ static void Main(){}; static void Main(){} } } c) Class Object{ static void Main(){} } Which of the ... program cannot compile because the for statement’s syntax is incorrect using System; class Test { static void Main() { int @Main; int[] Static= new int[3]; @Main =100*Static[1]; Console.WriteLine(@Main);...

Ngày tải lên: 21/08/2012, 15:55

... an int data type of a property Which of the following is the correct syntax for declaring an indexer a) protected int this[int var1] c) public int this(int var1) b) public int classname[int index] ... nothing How can we create the object dynamically in C# ? [2.5] a) C# does not allow instantiation c) By using the of objects at run time System.Activator CreateInstance() method to create an instance ... (myObjectType) d) In C# , Object cannot be instantiated at run time but a method of a class can be invoked [2.5] 193 using System.Reflection; using System; class Reflect { public int i=20; public char ch='a';...

Ngày tải lên: 29/08/2012, 16:37

... clntSocket); /* Error handling function */ /* TCP client handling function */ int main(int argc, char *argv[]) { int servSock; int clntSock; struct sockaddr _in echoServAddr; struct sockaddr _in echoClntAddr; ... gets a socket for an incoming client connection by calling accept () int accept(int socket, struct sockaddr *clientAddress, unsigned int *addressLength) accept() dequeues the next connection on ... new socket for each client connection Communicate with the client via that new socket using send() and recv() Close the client connection using close() Creating the socket, sending, receiving,...

Ngày tải lên: 05/11/2012, 14:45

... clntSocket); /* Error handling function */ /* TCP client handling function */ int main(int argc, char *argv[]) { int servSock; int clntSock; struct sockaddr _in echoServAddr; struct sockaddr _in echoClntAddr; ... gets a socket for an incoming client connection by calling accept () int accept(int socket, struct sockaddr *clientAddress, unsigned int *addressLength) accept() dequeues the next connection on ... new socket for each client connection Communicate with the client via that new socket using send() and recv() Close the client connection using close() Creating the socket, sending, receiving,...

Ngày tải lên: 15/11/2012, 14:57

... [1.0] “MyClass” a) Class myclass b) class Myclass 38 c) class MyClass d) Class MyClass Which of the following is a valid variable in C# ? a) c) _Class b) 39 Class Class d) @class Basic input and ... Which of the following are correct statements for implementing an abstract class a) public abstract void class ClassA [1.0] c) abstract public ClassA b) public abstract class ClassA 105 Which ... Static constructors can be take parameters called explicitly or implicitly b) Static constructors can have e) Static constructors are called accessibility modifiers when the class is loaded c) ...

Ngày tải lên: 09/04/2013, 09:10