Working with the Unix OS

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C Libraries int attrset (chtype attrs) turns on requested attributes int attroff (chtype attrs) turns off requested attributes A_BLINK A_BOLD A_ALT A_DIM A_REVERSE A_STANDOUT A_UNDERLINE int beep() rings terminal bell Input Options: int echo() int noecho() int cbreak() int nocbreak() break for each character line at a time processing Output: Curses assumes stdin and stdout are connected to a terminal. Once initscr() is called, curses takes over terminal control. If endwin() is missing, may need to type "stty sane" and terminated <strong>with</strong> ^J. #include #include exit(register int code){ /* flush and close o<strong>the</strong>r output streams */ endwin(); fflush(stdout), fflush(stderr); exit(code); /* exit must not return */ } main() { initscr(); signal (SIGINT, exit); ... return 0; } WINDOW *win; /* declare a variable */ initscr (); /* initialise screen */ win=newwin(int lines, int columns, int begin_y, int begin_x); /* open window */ wprintw(WINDOW *win, char *format); /*printf in window*/ wmove(WINDOW *win, int y, int x); /* set current position */ wclear(WINDOW *win); /* clear window */ delwin(WINDOW *win); /* delete window */ endwin(); /* end window modes */ /* show: - display file page at time - example for curses */ #include #include main(int argc, char *argv[]) { FILE *fd; char linebuf[BUFSIZ]; int line; void done(), perror(), exit(); if (argc != 2) { fprintf(stderr, "usage: %s file\n", argv[0]); exit(1); 77
C Libraries } if ((fd=fopen(argv[1], "r")) == NULL) { perror(argv[1]); exit(2); } signal (SIGINT, done); /* open window, echo off */ initscr(); noecho(); cbreak(); nonl(); idlok(stdscr, TRUE); } while(1) { move(0,0); for (line=0; line
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UNIVERSITY OF ATHENS DEPARTMENT OF
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Figure 27. Driver Entry Points.....
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Introduction to Unix ! Execution ma
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Introduction to Unix It works in th
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Introduction to Unix * matches 0 or
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Introduction to Unix vi file-name s
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Introduction to Unix 1,$s/^/>>/ 1,$
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Introduction to Unix ! Special Devi
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Introduction to Unix Working with F
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Introduction to Unix ! Communicatio
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Unix Shells 2. UNIX SHELLS Back Quo
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Unix Shells ! CASE Statement case t
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Unix Shells two lines !Y@Y@Z@Z@ZY c
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Unix Shells if $append then tee -a
Page 29 and 30: C Programming - Basics main() { int
Page 31 and 32: C Programming - Basics e.g. i += 2
Page 33 and 34: External Variables A C program cons
Page 35 and 36: C Programming - Basics main.c #incl
Page 37 and 38: C Programming - Basics default: pri
Page 39 and 40: C Programming - Basics struct tnode
Page 41 and 42: Unix Tools 4. UNIX TOOLS Tools of t
Page 43 and 44: Unix Tools Korn shell ! .profile HI
Page 45 and 46: Unix Tools grep "$name" $PHONEBOOK
Page 47 and 48: Unix Tools awk '$3 > 0 { print $1,
Page 49 and 50: Unix Tools END { print max, maxline
Page 51 and 52: Unix Tools Let an example input fil
Page 53 and 54: Unix Tools Brown eqn 1 # output Jon
Page 55 and 56: Development Tools Make looks at the
Page 57 and 58: Development Tools /* compute size o
Page 59 and 60: Development Tools #endif #line cons
Page 61 and 62: Development Tools 1.1 5 lines Retri
Page 63 and 64: Development Tools In Emacs, you may
Page 65 and 66: Development Tools */ %{ #define YYS
Page 67 and 68: C Libraries 6. C LIBRARIES Input an
Page 69 and 70: C Libraries } while (!feof(fp1)) pu
Page 71 and 72: C Libraries } free(p); /* what is w
Page 73 and 74: C Libraries } if ((fp->flag&( _READ
Page 75 and 76: C Libraries /* dirwalk: apply fcn t
Page 77 and 78: C Libraries } switch (pid=fork()){
Page 79: C Libraries What is curses? - libra
Page 83 and 84: Introduction to kernel 7. INTRODUCT
Page 85 and 86: 82 Introduction to kernel Programs
Page 87 and 88: Introduction to kernel } { printf("
Page 89 and 90: Introduction to kernel The kernel r
Page 91 and 92: Introduction to kernel UNIX Interna
Page 93 and 94: Introduction to kernel File System
Page 95 and 96: Introduction to kernel Every proces
Page 97 and 98: Processes I Process States 1. Execu
Page 99 and 100: Processes I } printf("%d %s\n", cnt
Page 101 and 102: Processes I dup (and other similar
Page 103 and 104: Processes I The u area contains - p
Page 105 and 106: Processes I The Context of a Proces
Page 107 and 108: Processes I Process Control use and
Page 109 and 110: Processes I Although the processes
Page 111 and 112: Processes I Handling Signals - proc
Page 113 and 114: Processes I USER=neville PATH=/user
Page 115 and 116: Processes I ! Shadow Password /etc/
Page 117 and 118: struct timeval { long tv_sec; /* se
Page 119 and 120: Processes I F_SETFL set status flag
Page 121 and 122: Processes I process is the child pr
Page 123 and 124: Processes I Rules about sharing of
Page 125 and 126: Processes II 9. PROCESSES (II) FORK
Page 127 and 128: Processes II /* background.c */ #in
Page 129 and 130: Processes II } while (1){ printf("p
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Processes II } /* child */ signal (
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Processes II int readline(int fd, c
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Processes II { } char process_name[
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Processes II - Pipe in a single pro
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Processes II System V IPC - message
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Processes II int msgctl(int msqid,
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Processes II For every semop operat
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Processes II /* client loop */ mesg
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I/O Subsystem Drivers frequently sl
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I/O Subsystem Terminal Drivers - In
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I/O Subsystem Canonical Mode algori
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I/O Subsystem Raw Mode Raw mode is
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Figure 43. Pushing a Module onto a
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Interprocess Communication } { ptra
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Interprocess Communication T ID KEY
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Interprocess Communication }; int m
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Interprocess Communication for (i=0
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Interprocess Communication /* struc
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Interprocess Communication ! Compar
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… connect(sockfd,(struct sockaddr
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Interprocess Communication Address
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Process Scheduling Page Tables and
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Figure 49. Tie breaker rule Process
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Process Scheduling Clock - restart
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Process Scheduling Figure 57. Mappi
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Figure 62. Sequence of Swapping Ope
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Buffer Cache The kernel takes buffe
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Buffer Cache The kernel places the
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Buffer Cache Process B will find th
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Unix Administration 14. UNIX ADMINI
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Unix Administration Example output
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Unix Administration *) IN=-mtime -2
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Unix Administration Load /Unix kern
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Unix Administration for (i=0; i&i d
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Unix Administration fi done echo $s
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Unix Administration New Software !
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Unix Security Example: group name:g
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Unix Security $ crypt < exam320.Z >
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Unix Security - exported filesystem
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Unix Security system(cmdstr); $ ech
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Unix Security - repairs damaged use
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Working with the Unix OS

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