Hi all,
I am writing user- space driver. My intention is to print whatever
string i am enter into terminal.
Here i am using setbuf function to sent the data to the print after some
fixed string length.
I wrote below program for understand setbuf functionality. But i am
getting unpredictable result for some output . can any one explain the
why i am getting these result.
root@desktop:/home/prabhu# cat a.c
#include <stdio.h>
main()
{
char buff2[]= "hello world";
char buf1[6]="";
setbuf(stdin, buf1);
getchar();
printf ("%s",buf1);
}
root@desktop:/home/prabhu# cc a.c
root@desktop:/home/prabhu# ./a.out
a
a
root@desktop:/home/prabhu# ./a.out
aa
aa
root@desktop:/home/prabhu# ./a.out
aaa
aaa
root@desktop:/home/prabhu# ./a.out
aaaa
aaaa
root@desktop:/home/prabhu# ./a.out
aaaaa
aaaaa
hello worldroot@desktop:/home/prabhu# ./a.out
aaaaaa
aaaaaa
ello worldroot@desktop:/home/prabhu# ./a.out
aaaaaaa
aaaaaaa
llo worldroot@desktop:/home/prabhu# ./a.out
aaaaaaaa
aaaaaaaa
lo worldroot@desktop:/home/prabhu# ./a.out
aaaaaaaaa
aaaaaaaaa
o worldroot@desktop:/home/prabhu# ./a.out
aaaaaaaaaa
aaaaaaaaaa
worldroot@desktop:/home/prabhu# ./a.out
aaaaaaaaaaa
aaaaaaaaaaa
Thanks,
Prabhu
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