Hi,
On Mon, Jul 22, 2013 at 8:53 PM, Margarita Manterola
<[email protected]> wrote:
> that is completely independent of the kernel
I'm sorry for this red-herring yesterday. As I mentioned before,
there was a change in rlwrap's implementation, which tainted my tests.
I'm now testing with a simplified version of the program originally
attached to the report. I'm attaching here the simplified version.
I tested this in a real machines that I had access to:
On Debian Lenny: the program works correctly, kernel version 2.6.26-2-686
On Debian Squeeze: works correctly with 2.6.32-5-amd64, both with
readline5 and readline6.
On Ubuntu Lucid: works correctly with 2.6.38.8 (x86_64) with readline6.1
On another Ubuntu Lucid: fails with 3.0.0-32 (x86_64) with both
readline5 and readline6.1
The program also fails when run on 3.2 (Debian Wheeze), 3.5 (Ubuntu
Quantal), 3.9 (Debian Sid).
I'm thinking of doing a git bisect between 2.6.38 and 3.0, but that
doesn't sound very appealing :-/
Also, regarding what Chet had said, I can confirm that commenting out
one of the calls that set/unset the terminal modes
(rl_prep_term_function or rl_deprep_term_function) "fixes" this (not a
real fix since this breaks the terminal, but it shows that the problem
is in what those calls do; it's interesting that commenting *either*
of them makes this work).
I'm guessing some ioctl call changed its behavior between 2.6.38 and
3.0. I'm unsure if this is readline's fault for using ioctl in a
wrong way, or the kernel's fault for breaking it. I guess it depends
on which call it is and how readline is using it.
--
Besos,
Marga
/* mini program to demonstrate problem with cut and paste, Frank Lübeck */
/* Simplified by Margarita Manterola. */
/* Compile:
* gcc -Wall -o minirl -O2 minirl.c -lreadline
* gcc -Wall -o minirl -O2 minirl.c $CPPFLAGS $LDFLAGS -lreadline -lncurses
* Run:
* ./minirl TESTOUT
* and paste the content of any text file (say 10kB without long lines),
* end program with Ctrl-d.
*
* Then
* diff original-file TESTOUT
* shows that in some lines trailing characters get lost. Or lines completely
* lost.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <readline/readline.h>
int main(int argc, char** argv) {
char* s;
FILE *out;
if (argc == 1) return 1;
out = fopen(argv[1], "w");
while (1) {
s = readline("> ");
if (!s) break;
fprintf(out,"%s\n",s);
free(s);
}
fflush(out);
return 0;
}
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