Package: gksu Version: 2.0.2-9 Severity: important File: /usr/bin/gksudo Related to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599233, but that's a "wishlist" item, while this here is a bug.
gksudo not only swallows the stderr output, it even makes the program hang if there's too much (a pipe full, ie. 64kB) of output: This here: # gksudo -- perl -e 'printf STDERR "%500.500s\n", "a" for 0 .. 100' just gets eaten, but # gksudo -- perl -e 'printf STDERR "%500.500s\n", "a" for 0 .. 1000' will hang indefinitely. I could rescue my long-running program by emptying the pipe via # sudo cat /proc/$PID_OF_SUDO_BELOW_GKSUDO/fd/2 but that's unacceptable. -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages gksu depends on: ii gconf-service 3.2.6-3 ii libatk1.0-0 2.18.0-1 ii libc6 2.19-22 ii libcairo2 1.14.4-1 ii libfontconfig1 2.11.0-6.3 ii libfreetype6 2.6-2 ii libgconf-2-4 3.2.6-3 ii libgdk-pixbuf2.0-0 2.32.1-1 ii libgksu2-0 2.0.13~pre1-8+b1 ii libglib2.0-0 2.46.1-2 ii libgnome-keyring0 3.12.0-1+b1 ii libgtk2.0-0 2.24.28-1 ii libpango-1.0-0 1.38.1-1 ii libpangocairo-1.0-0 1.38.1-1 ii libpangoft2-1.0-0 1.38.1-1 ii libstartup-notification0 0.12-4 ii sudo 1.8.12-1 Versions of packages gksu recommends: ii gnome-keyring 3.18.2-1 gksu suggests no packages. -- no debconf information