linux programming lab record

5/21/2018 Linux Programming Lab Record

1/29

L P L R JNTU WORLD [..]

1 B A [JNTU WORLD]

T . O :

1:

P .S 1 : ,

F ,

H

S 2 : T , ( )

$

H

S 03 13:40:15 PST 2006

2:

M .

W ,

. A .

S 1 : ,

F ,

H

S 2 : M

$ + _

$ +

S 3 : T ,

$

H

S 03 13:40:15 PST 2006

S 1 : U , , , . T

..

F , . :

()

( );

S 2 : S CC ( C C )

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2/29

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2 B A [JNTU WORLD]

$ .

I , .

S 3 : T , .

$ .

W

1. ,

.

#!//

E

F L : 1 $

L :

1 $

D :

$

2. .

#!//

$[1] $[2]

'//' 1 2 3 > .

A

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3/29

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3 B A [JNTU WORLD]

/^.//

.

/$.$$.$$/\2/

. /^$[AZ09]*$ *$[AZ09]*$/\2\1/

3. ,

.

"L F R, W E P C D"

*

[ $ $ $ ]

$

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4/29

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4 B A [JNTU WORLD]

4.

,

.

$

$

$

5. ,

.

E

[ $ ]

[ $ ]

: $

N : $

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5/29

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5 B A [JNTU WORLD]

6. .

E

[ $ ]

F $

$

D

:

7. .

F

"E : "

=1

=1

[ $ $ ]

=` $ \* $`

=` $ + 1`

"F $ = $"

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6/29

j


6 B A [JNTU WORLD]

8. .

. . . .

)

#

## BUFSIZE 1

( , **)

1;

;

;

1=([1],O_RDONLY);

("SS P F\");

((=(1,&,1))>0)

("%",);

/*

(1,&,1); */

(0);

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7/29

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7 B A [JNTU WORLD]

)

#

#

# #

# FALSE 0

# TRUE 1

();

[MAXPATHLEN];

()

,;

**;

_();

(() == NULL )

("E ");

(0);

("C W D = %",);

= (, &, _, );

( _, ".") == 0) ((>_, "..") == 0))

(FALSE);

(TRUE);

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8/29

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8 B A [JNTU WORLD]

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9/29

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9 B A [JNTU WORLD]

)

#

#

##

( , **)

1,2;

,=0;

1=([1],O_RDONLY);

2=([2],S_IWUSR);

(1,2);

([1]); (0);

9.

.

1.

2.

3. ,

4. (N: / )

PROGRAM

#

()

FILE *;

_;

=(,);

(==(FILE*)0)

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10/29

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10 B A [JNTU WORLD]

(,E ( )\);

();

(1);

(())==EOF)

(,E .( )\);

(1);

();

10. .

#

#

#

#

()

DIR *; *;

= (".");

( != NULL)

( = ())

("%\", >_);

();

("C' ");

0;

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11/29

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11 B A [JNTU WORLD]

11. . : 1.

()

(".","",);

("T .");

();

0;

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12 B A [JNTU WORLD]

12.

.

#

#

#

#

# BUFSIZE 4096

HANDLE _CS_IN_R = NULL;

HANDLE _CS_IN_W = NULL;

HANDLE _CS_OUT_R = NULL;

HANDLE _CS_OUT_W = NULL;

HANDLE _IF = NULL;

CCP();

WTP();

RFP();

EE(PTSTR);

_( , TCHAR *[])

SECURITY_ATTRIBUTES A;

("\>S .\");

// S IH .

A.L = (SECURITY_ATTRIBUTES);

A.IH = TRUE;

A.SD = NULL;

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13 B A [JNTU WORLD]

// C ' STDOUT.

( ! CP(&_CS_OUT_R, &_CS_OUT_W, &A, 0) )

EE(TEXT("SR CP"));

// E STDOUT .

( ! SHI(_CS_OUT_R, HANDLE_FLAG_INHERIT, 0) )

EE(TEXT("S SHI"));

// C ' STDIN.

(! CP(&_CS_IN_R, &_CS_IN_W, &A, 0))EE(TEXT("S CP"));

// E STDIN .

( ! SHI(_CS_IN_W, HANDLE_FLAG_INHERIT, 0) )

EE(TEXT("S SHI"));

// C .

CCP();

// G .

// T .

( == 1)

EE(TEXT("P .\"));

_IF = CF(

[1],

GENERIC_READ,

0,

NULL,

OPEN_EXISTING,

FILE_ATTRIBUTE_READONLY,

NULL);

( _IF == INVALID_HANDLE_VALUE )

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14 B A [JNTU WORLD]

EE(TEXT("CF"));

// W .

// D ' ,

// .

WTP();

( "\>C % STDIN .\", [1]);

// R .

( "\>C STDOUT:\\", [1]);

RFP();

("\>E .\");

// T .

// T , .

0;

CCP()// C STDIN STDOUT.

TCHAR C[]=TEXT("");

PROCESS_INFORMATION PI;

STARTUPINFO SI;

BOOL S = FALSE;

// S PROCESS_INFORMATION .

ZM( &PI, (PROCESS_INFORMATION) );

// S STARTUPINFO .

// T STDIN STDOUT .

ZM( &SI, (STARTUPINFO) );

SI. = (STARTUPINFO);

SI.SE = _CS_OUT_W;

SI.SO = _CS_OUT_W;

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15 B A [JNTU WORLD]

SI.SI = _CS_IN_R;

SI.F = STARTF_USESTDHANDLES;

// C .

S = CP(NULL,

C, //

NULL, //

NULL, //

TRUE, //

0, //

NULL, // '

NULL, // '

&SI, // STARTUPINFO &PI); // PROCESS_INFORMATION

// I , .

( ! S )

EE(TEXT("CP"));

// C .

// S // , .

CH(PI.P);

CH(PI.T);

WTP()

// R ' STDIN.

// S .

DWORD R, W;

CHAR B[BUFSIZE];

BOOL S = FALSE;

(;;)

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16 B A [JNTU WORLD]

S = RF(_IF, B, BUFSIZE, &R, NULL);

( ! S R == 0 ) ;

S = WF(_CS_IN_W, B, R, &W, NULL);

( ! S ) ;

// C .

( ! CH(_CS_IN_W) )

EE(TEXT("SIW CH"));

RFP()

// R ' STDOUT

// ' STDOUT.

// S .

DWORD R, W;

CHAR B[BUFSIZE];

BOOL S = FALSE;

HANDLE PSO = GSH(STD_OUTPUT_HANDLE);

// C

// , .

// T

// .

(!CH(_CS_OUT_W))

EE(TEXT("SOW CH"));

(;;)

S = RF( _CS_OUT_R, B, BUFSIZE, &R, NULL);

( ! S R == 0 ) ;

S = WF(PSO, B,

R, &W, NULL);

(! S ) ;

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17/29

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17 B A [JNTU WORLD]

EE(PTSTR F)

// F , ,// .

LPVOID MB;

LPVOID DB;

DWORD = GLE();

FM(

FORMAT_MESSAGE_ALLOCATE_BUFFER

FORMAT_MESSAGE_FROM_SYSTEM FORMAT_MESSAGE_IGNORE_INSERTS,

NULL,

,

MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

(LPTSTR) &MB,

0, NULL );

DB = (LPVOID)LA(LMEM_ZEROINIT,

(((LPCTSTR)MB)+((LPCTSTR)F)+40)*(TCHAR));SCP((LPTSTR)DB,

LS(DB) / (TCHAR),

TEXT("% %: %"),

F, , MB);

MB(NULL, (LPCTSTR)DB, TEXT("E"), MB_OK);

LF(MB);

LF(DB);

EP(1);

.

.

. .

.

#

#

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18 B A [JNTU WORLD]

# BUFSIZE 4096

()

CHAR B[BUFSIZE];

DWORD R, W;

HANDLE S, S;

BOOL S;

S = GSH(STD_OUTPUT_HANDLE);

S = GSH(STD_INPUT_HANDLE);

(

(S == INVALID_HANDLE_VALUE) (S == INVALID_HANDLE_VALUE)

)

EP(1);

// S ' .

("\ ** T . ** \");

// T .

// I .// L .

(;;)

// R .

S = RF(S, B, BUFSIZE, &R, NULL);

(! S R == 0)

;

// W .

S = WF(S, B, R, &W, NULL);

(! S)

;

0;

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19 B A [JNTU WORLD]

13. .

#

#

#

#

( , *[])

/*

* F

*/

;

// 1

(()) 0;

//

("/");

();

(0);

// 2

= ();

()

("D: %\", );

0;

/****** C ********/

FILE *;

=("//.", "");

(1)

(, "\");

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20/29

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20 B A [JNTU WORLD]

();

(2);

/**********************************/

14. .

#

#

#

#

#

()

_ ;

=();

(==0)

(1)

(" = %, =%\",()(), ()());

(3);

(" ");

0;

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21 B A [JNTU WORLD]

15. .

) .) .

) .

#

#

#

# MAX 255

;

[MAX];

*;

[MAX];

()

,,,=0;;

((=(1006,IPC_CREAT 0666))=6;

=(,O_RDONLY);

((,,25)>0)

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22 B A [JNTU WORLD]

( >,);

((,,( >),0)== 1)

(\ M W E);

((=(1006,0))0)

(1,.,);

++;

((= = 1)&(= =0))(\ N M Q Q:%,);

16. .(

)

#

#

#

#

#

#

#

# NUM_LOOPS 20

( , * [])

__;

_;

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23/29

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23 B A [JNTU WORLD]

_;

;

_;

;

;

__ = (IPC_PRIVATE, 1, 0600);

(__ == 1)

(": ");

(1);

(" ,

'%'.\", __);

_. = 0;

= (__, 0, SETVAL, _);

_ = ();

(_)

1:

("");

(1);

0:

(=0;


24/29

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24 B A [JNTU WORLD]

(2);

(() > 3*(RAND_MAX/4))

._ = 0;

._ = 10;(&, NULL);

;

0;

17. .

#

#

#

()

_;

* _;

_ ;

_;

__ = 06400;

/* A . */

_ = (IPC_PRIVATE, __,

IPC_CREAT IPC_EXCL S_IRUSR S_IWUSR);

/* A . */

_ = (*) (_, 0, 0);

( %\, _);

/* D . */

(_, IPC_STAT, &);

_ = ._;

( : %\, _);

/* W . */

(_, H, .);

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25 B A [JNTU WORLD]

/* D . */

(_);

/* R , . */

_ = (*) (_, (*) 05000000, 0);

( %\, _);/* P . */

(%\, _);

/* D . */

(_);

/* D . */

(_, IPC_RMID, 0);

0;

18. .

#

#

#

#

# MAXBUF 100

# KEY 1216

# SEQFILE

,;

_();

_();

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26 B A [JNTU WORLD]

;

_ *;

*;;

(])

, ,, , ;

[MAXBUF+1];

=();

((=(KEY, 1, IPC_CREAT 0666))= = 1)

();(1);

.=1;

((,0,SETVAL,)


27/29

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27 B A [JNTU WORLD]

();

(1);

(1);

_();

_( )

=(0, 1, 0);

((, &, 1)= =0)

(L: R\);

(E L\);

_( )

=(0, 1, 0);

((, &, 1)= =0)

(UL: R\);

(E U\);

19. /.

#

# < /.>

#

( , **)

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28 B A [JNTU WORLD]

FILE *1;

,=0;

;

1=([1],"");

(!(1))

=(1);

(==' ')

=+1;

("\ T B= %",);

(0);

20. .

A . I

.

A , FIFO ,

; . A FIFO

() .

WRITER.C

#

#

# #

()

;

* = "//";

/* FIFO ( ) */

(, 0666);

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29 B A [JNTU WORLD]

/* "H" FIFO */

= (, O_WRONLY);

(, "H", ("H"));

();

/* FIFO */

();

0;

READER.C

# #

#

#

# MAX_BUF 1024

()

; * = "//";

[MAX_BUF];

/* , , FIFO */

= (, O_RDONLY);

(, , MAX_BUF);

("R: %\", );

();

0;

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