Package: expect-dev
Version: 5.44.1.14-2
Severity: normal
Calling exp_popen from C causes a segfault. Here is a test program.
#include <stdio.h>
#include <tcl8.5/expect.h>
int main()
{
FILE *pipe;
char *some_command = "uname";
char datum;
pipe = exp_popen(some_command);
while ((datum = getc (pipe)) != EOF)
printf("%c",datum);
}
Here are the last few lines of the strace output.
open("/dev/tty", O_RDWR) = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGWINSZ, {ws_row=42, ws_col=142, ws_xpixel=852, ws_ypixel=546}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Segmentation fault
The segfault occurs before attempting to read from the stream. This is
100% repeatable and started happening since expect-dev was upgraded on
10/27/09. This program works correctly on a system with the previous
versions (substituting #include <tcl8.4/expect.h> above).
$ gcc usexpect.c -lexpect
$ a.out
Linux
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash
Versions of packages expect-dev depends on:
ii expect 5.44.1.14-2 A program that can automate intera
ii tcl8.5-dev 8.5.7-1 Tcl (the Tool Command Language) v8
Versions of packages expect-dev recommends:
ii expectk 5.44.1.14-2 A program that can automate intera
ii tk8.5-dev 8.5.7-1 Tk toolkit for Tcl and X11, v8.5 -
expect-dev suggests no packages.
-- no debconf information
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