Hi all,
I'm facing really weird behavior of simple C program
running under OpenBSD (4.7 and CURRENT).
The code follows. The output also. The file to test the program with
is also inline attached.
The decomp procedure reads input, writes it to the stdout. All 4-chars
preceeded by number are printer number times (e.g. 4abcd ->
abcdabcdabcdabcd).
./a.c < test_file.txt
should have output
aaaaa bb
ccccccccccc dddd
however it sometimes ( 1 from 3 tryies, sometimes 1 from 20 or even 1
from 40)
looks like
aaaaa bb
ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
cccccccccccccccccccccccccccccccccccccc
dddd
I've tryied this code with OpenBSD 4.7, OpenBSD CURRENT, CentOS Linux,
FreeBSD 8.0 (all i386 arch), but the problem occurs only at OpenBSD (both
versions).
Does anyone know please where could be the problem? Because I have
really no idea.
Thanks a lot,
Milan Bartos
---- CODE ---
#include <stdio.h>
#include <stdlib.h>
void decomp(unsigned int N){
char *pole;
pole=malloc( sizeof(char) * N );
char character;
int i,j;
int counter;
while( (character = getchar()) != EOF){
if( isdigit(character) ){
counter=atoi(&character);
for( i=0 ; i < N ; i++){
pole[i]=getchar();
}
for( i=0 ; i < counter ; i++){
for( j=0 ; j < N ; j++){
putchar(pole[j]);
}
}
}
else {
putchar(character);
}
}
}
int main(){
unsigned int N=4;
decomp(N);
}
----- END OF CODE ---
----- OUTPUT ---
> ./a < out4.txt
aaaaa bb
ccccccccccc dddd
> ./a < out4.txt
aaaaa bb
ccccccccccc dddd
> ./a < out4.txt
aaaaa bb
ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
cccccccccccccccccccccccccccccccccccccc
dddd
> ./a < out4.txt
aaaaa bb
ccccccccccc dddd
>
------ END OF OUTPUT ---
------ TEST FILE ---
aaaaa bb
2ccccccc dddd
------ END OF TEST FILE ---
--
merlyn <mer...@merlyn.cz>
OpenBSD mail.merlyn.cz 4.7 GENERIC.MP#1 i386
[demime 1.01d removed an attachment of type application/pgp-signature]
