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weston-launch: Don't start new session unless -u is given

This commit is contained in:
Kristian Høgsberg 2013-07-22 10:35:47 -07:00
parent ab4999492c
commit 636156d5f6
1 changed files with 38 additions and 24 deletions
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52
src/weston-launch.c
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@ -73,6 +73,7 @@ struct weston_launch {
pid_t child;
int verbose;
char *new_user;
};
union cmsg_data { unsigned char b[4]; int fd; };
@ -416,11 +417,13 @@ quit(struct weston_launch *wl, int status)
close(wl->signalfd);
close(wl->sock[0]);
if (wl->new_user) {
err = pam_close_session(wl->ph, 0);
if (err)
fprintf(stderr, "pam_close_session failed: %d: %s\n",
err, pam_strerror(wl->ph, err));
pam_end(wl->ph, err);
}
exit(status);
}
@ -474,7 +477,9 @@ setup_tty(struct weston_launch *wl, const char *tty)
struct stat buf;
char *t;
if (tty) {
if (!wl->new_user) {
wl->tty = STDIN_FILENO;
} else if (tty) {
t = ttyname(STDIN_FILENO);
if (t && strcmp(t, tty) == 0)
wl->tty = STDIN_FILENO;
@ -512,14 +517,12 @@ setup_tty(struct weston_launch *wl, const char *tty)
}
static void
launch_compositor(struct weston_launch *wl, int argc, char *argv[])
setup_session(struct weston_launch *wl)
{
char *child_argv[MAX_ARGV_SIZE];
char **env;
char *term;
int i;
if (wl->verbose)
printf("weston-launch: spawned weston with pid: %d\n", getpid());
if (wl->tty != STDIN_FILENO) {
if (setsid() < 0)
error(1, errno, "setsid failed");
@ -534,6 +537,14 @@ launch_compositor(struct weston_launch *wl, int argc, char *argv[])
setuid(wl->pw->pw_uid) < 0)
error(1, errno, "dropping privileges failed");
term = getenv("TERM");
clearenv();
setenv("TERM", term, 1);
setenv("USER", wl->pw->pw_name, 1);
setenv("LOGNAME", wl->pw->pw_name, 1);
setenv("HOME", wl->pw->pw_dir, 1);
setenv("SHELL", wl->pw->pw_shell, 1);
env = pam_getenvlist(wl->ph);
if (env) {
for (i = 0; env[i]; ++i) {
@ -542,6 +553,18 @@ launch_compositor(struct weston_launch *wl, int argc, char *argv[])
}
free(env);
}
}
static void
launch_compositor(struct weston_launch *wl, int argc, char *argv[])
{
char *child_argv[MAX_ARGV_SIZE];
int i;
if (wl->verbose)
printf("weston-launch: spawned weston with pid: %d\n", getpid());
if (wl->new_user)
setup_session(wl);
if (wl->tty != STDIN_FILENO)
setenv_fd("WESTON_TTY_FD", wl->tty);
@ -578,8 +601,7 @@ main(int argc, char *argv[])
{
struct weston_launch wl;
int i, c;
char *tty = NULL, *new_user = NULL;
char *term;
char *tty = NULL;
struct option opts[] = {
{ "user", required_argument, NULL, 'u' },
{ "tty", required_argument, NULL, 't' },
@ -593,7 +615,7 @@ main(int argc, char *argv[])
while ((c = getopt_long(argc, argv, "u:t::vh", opts, &i)) != -1) {
switch (c) {
case 'u':
new_user = optarg;
wl.new_user = optarg;
if (getuid() != 0)
error(1, 0, "Permission denied. -u allowed for root only");
break;
@ -612,21 +634,13 @@ main(int argc, char *argv[])
if ((argc - optind) > (MAX_ARGV_SIZE - 6))
error(1, E2BIG, "Too many arguments to pass to weston");
if (new_user)
wl.pw = getpwnam(new_user);
if (wl.new_user)
wl.pw = getpwnam(wl.new_user);
else
wl.pw = getpwuid(getuid());
if (wl.pw == NULL)
error(1, errno, "failed to get username");
term = getenv("TERM");
clearenv();
setenv("TERM", term, 1);
setenv("USER", wl.pw->pw_name, 1);
setenv("LOGNAME", wl.pw->pw_name, 1);
setenv("HOME", wl.pw->pw_dir, 1);
setenv("SHELL", wl.pw->pw_shell, 1);
if (!weston_launch_allowed(&wl))
error(1, 0, "Permission denied. You should either:\n"
#ifdef HAVE_SYSTEMD_LOGIN
@ -639,7 +653,7 @@ main(int argc, char *argv[])
if (setup_tty(&wl, tty) < 0)
exit(EXIT_FAILURE);
if (setup_pam(&wl) < 0)
if (wl.new_user && setup_pam(&wl) < 0)
exit(EXIT_FAILURE);
wl.epollfd = epoll_create1(EPOLL_CLOEXEC);