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xorg-wrapper: when starting the server as root, reset its environment

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When the server is privileged, we shouldn't be passing the user's
environment directly.

Clearing the environment is recommended by the libdbus maintainers, see
https://bugs.freedesktop.org/show_bug.cgi?id=52202

v2: rename envp to empty_envp (Jeremy)
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83849
Signed-off-by: Julien Cristau <jcristau@debian.org>
This commit is contained in:
Julien Cristau 2015-10-19 15:42:30 +02:00 • committed by Adam Jackson
parent 08c4912406
commit 1d4aa67242
1 changed files with 5 additions and 1 deletions
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6
hw/xfree86/xorg-wrapper.c
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@ -194,6 +194,7 @@ int main(int argc, char *argv[])
int total_cards = 0;
int allowed = CONSOLE_ONLY;
int needs_root_rights = -1;
char *const empty_envp[1] = { NULL, };
progname = argv[0];
@ -271,7 +272,10 @@ int main(int argc, char *argv[])
}
argv[0] = buf;
(void) execv(argv[0], argv);
if (getuid() == geteuid())
(void) execv(argv[0], argv);
else
(void) execve(argv[0], argv, empty_envp);
fprintf(stderr, "%s: Failed to execute %s: %s\n",
progname, buf, strerror(errno));
exit(1);