Advanced Programming in the UNIX® Environment

ptg10805159 Section 14.8 Memory-Mapped I/O 527 references to the mapped region then reference the copy.(One use of this flag is ...

ptg10805159 528 Advanced I/O Chapter 14 kernel daemons decide when dirty pages arewritten back based on (a) system load and (b) ...

ptg10805159 Section 14.8 Memory-Mapped I/O 529 #include "apue.h" #include <fcntl.h> #include <sys/mman.h> #define CO ...

ptg10805159 530 Advanced I/O Chapter 14 We first open both files and then callfstatto obtain the size of the input file. We need ...

ptg10805159 Section 14.9 Summary 531 system call and extra copying differs from the page fault overhead, then one approach will ...

ptg10805159 532 Advanced I/O Chapter 14 Exercises 14.1 Write a test program that illustrates your system’s behavior when a proce ...

ptg10805159 15 Inter process Communica tion 15.1 Introduction In Chapter 8, we described the process control primitives and saw ...

ptg10805159 534 Interprocess Communication Chapter 15 FreeBSD Linux Mac OS X Solaris IPC type SUS 8.0 3.2.0 10.6.8 10 half-duple ...

ptg10805159 Section 15.2 Pipes 535 Despite these limitations, half-duplex pipes arestill the most commonly used form of IPC. Eve ...

ptg10805159 536 Interprocess Communication Chapter 15 fork parent child fd[0] fd[1] fd[0] fd[1] kernel pipe Figure 15.3Half-dupl ...

ptg10805159 Section 15.2 Pipes 537 If wewriteto a pipe whose read end has been closed, the signalSIGPIPEis generated. If we eit ...

ptg10805159 538 Interprocess Communication Chapter 15 Example Consider a program that displays some output that it has created, ...

ptg10805159 Section 15.2 Pipes 539 exit(0); }else { /* child */ close(fd[1]); /* close write end */ if (fd[0] != STDIN_FILENO) { ...

ptg10805159 540 Interprocess Communication Chapter 15 #include "apue.h" static int pfd1[2], pfd2[2]; void TELL_WAIT(void) { if ( ...

ptg10805159 Section 15.3 popenandpcloseFunctions 541 We create two pipes beforethefork, as shown in Figure15.8. The parent write ...

ptg10805159 542 Interprocess Communication Chapter 15 parent cmdstring(child) fp stdin Figure 15.10Result offp = popen(cmdstring ...

ptg10805159 Section 15.3 popenandpcloseFunctions 543 while (fgets(line, MAXLINE, fpin) != NULL) { if (fputs(line, fpout) == EOF) ...

ptg10805159 544 Interprocess Communication Chapter 15 if (childpid == NULL) { /* first time through */ /* allocate zeroed out ar ...

ptg10805159 Section 15.3 popenandpcloseFunctions 545 } childpid[fileno(fp)] = pid; /* remember child pid for this fd */ return(f ...

ptg10805159 546 Interprocess Communication Chapter 15 Note that ouropen_max function from Figure2.17 can return a guess of the m ...