advanced programming in unix environment

UNIX advanced environment programming (6) standard I/O function library and I/O function library The standard I/O function library hides the buffer size and allocation details so that we don't have to worry about whether the pre-allocated memory size is correct. Although this makes this function library easy to use, if we are not familiar with the function princi

UNIX advanced environment programming (11) Process Control-Process snapshot, User Identifier, Process scheduling, unixprocess 1. Process Accounting) When a process is terminated, the kernel saves some data for the process, including a small portion of the binary data, CPU time, startup time, user Id, and group Id of the command. This process is called process acc

advanced Programming for UNIX Environments (third edition) code compilationThis address: Http://blog.csdn.net/caroline_wendyDate: 2014.10.21. Download code:http://www.apuebook.com/code3e.html2. Install dependent libraries:sudo apt-get install Libbsd-dev3. Go to the download directory make4. Copying header files and dynamic link librariessudo cp./include/apue.h/usr/include/sudo CP./lib/libapue.a/usr/loca

Reference book: Unxi Environment Advanced ProgrammingSignal function:The prototype is:we generally use the first, that is, through the typedef rewrite. Note: The signal function I generally consider to be the way that the kernel registers the processing of the current process to receive signals. signal (sigint,handler);parameter Description:Signum: Specify the signalHandler:sig_ign ignores this signal, SIG_

the synchronization of threads is very important. threads can be divided into user-level threads and core-level threads. (1) The user-level thread is mainly to solve the problem of switching between the top and bottom, its scheduling algorithm and scheduling process is the user's own choice of decision, at run time does not need a specific kernel support, the operating system will provide a library function, including the creation of threads, scheduling, revocation and other functions. And the

Beginner "Unix environment advanced programming" friends will encounter a problem, run inside the instance (download: http://www.apuebook.com/) problems, prompt "error: apue. h: No file or directory ".Apue. H is a header file customized by the author, including common header files and error handling functions required by the program. So it should be put into the

UNIX advanced environment programming (3) Files And Directories, unixdirectories In the previous two articles, we learned some basic operation functions of IO operations, including open, read, and write. In this article, we will learn about other features of the file system and the attributes of a file. The functions involved include: View all attributes of

Sleep function error ("Advanced Programming in the UNIX Environment" Third Edition No. 374), programmingno.374 Test proof code: #include Operation instructions: Here I will explain how to communicate with the author, so I use English, but my English level is limited. I hope to understand: I shoshould give you my manipulation. you shoshould send a SIGUSR1 to the

Transferred from: http://www.xitongbuluo.com/jiaocheng/17264.htmlDownload apue.h file in http://download.csdn.net/detail/lincoln_2012/7680675/************************************************************************************************************** /The apue.h file is a file that is written in the book and contains the usual header files that the system does not own. This includes the usual header files, and the definition of the error handling function, which is very convenient to use. Howe

library file, in order: (ROOT)/lib->/lib->/usr/lib->/usr/local/Libcflags=-ansi-i$ (ROOT)/include-wall-dlinux-D_gnu_source $ (EXTRA) Ranlib=EchoAR=arAWK=awkLibapue=$ (ROOT)/lib/libapue.a# Common temp files to delete from each directory. Tempfiles=core core.* *.o temp.* *.out2. Complete the code in the self-built working directoryCopy the codebase to your own directory (MYAPUE)Building the first chapter code catalog$mkdir CH1$CD CH1Then copy the apue.3e makefile to CH1, remove the values that nee

)); Exit (-1); } alrm_is_pending ("before alarm"); Alarm (2); Sleep (4); Alrm_is_pending ("After alarm"); Exit (0);}sigpendingdemo.cCompile the program SIGPENDINGDEMO.C, generate and execute the file Sigpendingdemo. From the results below, we see that the call to the alarm function generates a signal SIGALRM, which is the signal set in the set parameter of the Sigpending function.gcc -o sigpendingdemo sigpendingdemo.clienhua34:demo$. /Sigpendingdemobefore ALARM:SIGALRM isn't pendingafter alarm:s

THREADS/EXITSTATUS.C 11-2#include "apue.h" #include threads/badexit2.c 11-3#include "apue.h" #include UNIX Environment Advanced Programming 11.5 thread termination

threads/mutex1.c 11-5#include UNIX environment Advanced Programming 11.6 thread synchronization

#pragmaOMP parallel Sections8 {9 #pragmaOMP sectionTenprintf"[%d]:hello\n", Omp_get_thread_num ()); One #pragmaOMP section Aprintf"[%d]:world\n", Omp_get_thread_num ()); - } - theExit0); -}The OpenMP standard multithreading is implemented using the # preprocessing tag, which needs to be added with the-FOPENMP parameter when compiling with GCC. Make Hello cc -fopenmp-wall hello.c -o hello>$./hello[0]:hello[ 1]:world>$./hello[1]:world[0]:hello >$As you can see from the running results abov

Recently in the revision of APUE ("UNIX Environment Advanced Programming"), previously in Linux, and now intend to get down in their own machine, so Google, the compilation of things done, modify some of the tutorials some errors, such as download links and so on. 1, download source files, I am here is the second edition, looks like the third edition of the Engl

Advanced Programming in Unix environment-"apue. h" configuration, unixapue. h The book is not much said. It is called the Bible for C Programming in Unix. However, it seems that some people in China like to recommend books to others now. I doubt if some people have read every book recommended. I am not recommended for

programmingBy knowing more about memory-related knowledge, when programming in peacetime, it should be clearer why we need to follow the rules below. After allocating a chunk of memory, do not change anything outside of this memory range. It is an error to release the same piece of allocated memory more than once. When the same piece of memory is released two times, the common consequence is unpredictable behavior. The free () function must never be used without a pointer retur

[07] UNIX process environment========================================1. Process TerminationAtexit () function registration termination processProgram.Exit () or return statement:Terminate the Handler-> terminate the Handler-> standard I/O cleanup-> _ exit ()-> enter the kernel._ Exit () directly enters the kernel. 2. Environment tableExtern char ** environ;Exam

Process: Running a programThreads: Functions that run1.main ()Startup routinesExit (int main (argc, argv));2. Process terminationThe process terminates normally:1) Call Termination handler2) Standard IO cleanup programAbnormal termination:Atexit (3);hook functionThe order in which the registration functions are executed is the opposite of the order in which they are registeredExecution condition: the main () function calls return, or exit (3) is called at any location;3.

The environment configuration steps are as follows.1, download the source file: http://www.apuebook.com/src.tar.gz.2, copy the src.tar.gz file to the/home/me/mydir/unixl/directory (self-built directory).3. The apue.2e directory file is generated after decompression.4, modify the file APUE.2E/MAKE.DEFINES.FREEBSD.wkdir=/home/me/mydir/unixl/apue.2e5, modify the file apue.2e/threadctl directory getenv1.c, getenv3.c.Add all # define ARG_MAX 4096 macro def