[RFC] Get selection to buffer addition

From: salvador (salvador@inti.gov.ar)
Date: Tue Jul 31 2001 - 07:48:13 EST


Hi all:

What I'm looking for:
  I'm looking for comments and approval for a small addition to the console
driver (drivers/char/console.c).

Small description:
  The included patches adds a couple of new services to the TIOCLINUX ioctl
call, they are:

13 (get selection into a buffer): It copies the contents of the selection
buffer (maintained in kernel space) into a user space provided buffer. Is
something like "paste to a buffer" instead of just paste to the current
console.

14 (get selection length): Returns the length of the selection buffer (0 if
none selected).
-----------

The included file (compressed and uuencoded) contains diffs that apply
without offsets into 2.4.7 kernel, they are valid for 2.2.18 too (with
offset).
I also include a simple test program that calls the new services. The test
program is really simple and assumes you can open /dev/tty1 (you are
there or you are root ;-)

Additional question: Why the switch uses numbers? Shouldn't these values be
defined as something like TIOCLINUX_GET_SELECTION in a header?

What's the purpose? Just allow pasting in text editors using menues or
without the mouse middle button and avoiding to missinterpret the pasted
text as keystrokes.

SET

begin 664 patchConsole-2.4.7.txt.gz
M'XL("/K,83L"`W!A=&-H0V]N<V]L92TR+C0N-RYT>'0`E57?C]HX$'Z&OV*D
MOA!"0F!9V++M'JM3M^VINH?>MB_5*0K)D%@--N<?['+5_N\W=K*0](+:(@*Q
M/?.-9[[/GB`(H&3</`;3<!8N0B%9/LXDVZ-4X[1(Y#@57(D2P[1W;Q#^,!PF
M4YA<+B<+^L(TBB9]W_>;(&?]"T/^)4SG0,X7%\O9O/)?K2"8S$9S\.GW"E:K
M/L#0/O"[V!T@X1GL$J41-H:GF@D.ZP/<\DSB`[Q+#B5J/7+F`$IL$9`7"4]Q
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M)I$K7:_7DZB-Y!!=VU&:*"3.EKWQT"6\R>.:$QB.F^:GA>N^_^QW<?0[5R@"
M\4\@9!D?+>/*9)#(W&M@SCHPZU*WP79&QT810!NULAUX(Q@8KEC.,;-[@J$W
M&%C-T0M%!!\FGF=+\$1/C1B\>?_GY]L/-/O4#WZH_6-(4N^=9'"':X"7,)DO
M+Z+E=/H3ZF\BM/5_V=;_].K*$4E_LTG%8X-%RJ#OC^OSH`L$(DH[>8N-&Y\*
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M@^6V[W\CVJK29ZBTY;K%3,68G:8\>FP#CE%';;74065%H6+_HM@X6CWZ6'4<
MJ;R[_?3AWH&"A;61X34\2Z`#X#1L!O.<-NM]U3J\L16MTXY+7;C`]=KK[]8:
MWJ<%#VQ)W&1*I,5:5.G:38X:`*.Z-E5J';D]`99T:+ZU-A"Y%7KB^'A&_E](
MQ\^92EJ`D\!\PG(">TN'LE-/%?J/E-/BL//0[@7+:KW4X4^U@-^^JRPLCYN#
ML8U+>>I?T#^MN/OS'X/4NVI3K:FE*"52EFC:Z0.C.`[22'<E/S<LY]F5:N>]
MP7A:F@S';J%Q[`MW<;AC']F+@X[]Y;S[XC@/T;XY9M$R6C0ZY\)USD7=.?%1
MHW1WM"MF*9*L-/KLT;UN>6P%22F6N!-2,YY7;)U,[+!E,U!:FE3;FL;UZ]`.
M1@YM;:@Q5[CR\?GE8*77"/E+%\W)]2>51GOOPXL,-XQCU6QC;K;4YTJSY:HW
FV*>NYWVQY-N7O\,LN'&3I?*Z/(D<5+WSCE(\D.-_G[[YF5<)````
`
end
-------------------------------------------
Test program:

#include <stdio.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
 int i,res,fd,largo;
 char buffer[sizeof(unsigned int)+2],*s;
 unsigned int *lg=(unsigned int *)(buffer+1);

 fd=open("/dev/tty1",O_RDWR);

 printf("Finding the length of the selection:\n");
 buffer[0]=14;
 res=ioctl(fd,TIOCLINUX,&buffer);
 printf("The iotcl returns %d\n",res);
 printf("Length: %u\n",*lg);
 largo=*lg;
 if (*lg==0) return 0;

 printf("Asking for the selection:\n");
 s=(char *)malloc(largo+sizeof(unsigned int)+2);
 s[0]=13;
 lg=(unsigned int *)(s+1);
 *lg=largo;
 res=ioctl(fd,TIOCLINUX,s);
 printf("The iotcl returns %d\n",res);
 largo=*lg;
 printf("Length returned: %d\n",largo);
 s+=1+sizeof(unsigned int);
 s[largo]=0;

 for (i=0; s[i]; i++)
     if (s[i]==13) s[i]=10;
 printf("Selection: '%s' (%d)\n",s,s[0]);
 return 0;
}

--
Salvador Eduardo Tropea (SET). (Electronics Engineer)
Visit my home page: http://welcome.to/SetSoft or
http://www.geocities.com/SiliconValley/Vista/6552/
Alternative e-mail: set-soft@bigfoot.com set@computer.org
                    set@ieee.org
Address: Curapaligue 2124, Caseros, 3 de Febrero
Buenos Aires, (1678), ARGENTINA Phone: +(5411) 4759 0013

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