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From 5f2d71998eb77068cbaee2d468cbb296a42d5739 Mon Sep 17 00:00:00 2001
From: Tom Hochstein <tom.hochstein@nxp.com>
Date: Wed, 22 Feb 2017 15:53:30 +0200
Subject: [PATCH] weston-launch: Provide a default version that doesn't require
PAM
weston-launch requires PAM for starting weston as a non-root user.
Since starting weston as root is a valid use case by itself, if
PAM is not available, provide a default version of weston-launch
without non-root-user support.
Upstream-Status: Pending
Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Ming Liu <ming.liu@toradex.com>
---
libweston/meson.build | 16 ++++++++++++----
libweston/weston-launch.c | 21 +++++++++++++++++++++
meson_options.txt | 7 +++++++
3 files changed, 40 insertions(+), 4 deletions(-)
diff --git a/libweston/meson.build b/libweston/meson.build
index 08d23ec..cb9fd3f 100644
--- a/libweston/meson.build
+++ b/libweston/meson.build
@@ -216,16 +216,24 @@ dep_vertex_clipping = declare_dependency(
)
if get_option('weston-launch')
- dep_pam = cc.find_library('pam')
+ deps_weston_launch = [systemd_dep, dep_libdrm]
- if not cc.has_function('pam_open_session', dependencies: dep_pam)
- error('pam_open_session not found for weston-launch')
+ if get_option('pam')
+ dep_pam = cc.find_library('pam')
+ if not cc.has_function('pam_open_session', dependencies: dep_pam)
+ error('pam_open_session not found for weston-launch')
+ endif
+
+ if dep_pam.found()
+ deps_weston_launch += dep_pam
+ config_h.set('HAVE_PAM', '1')
+ endif
endif
executable(
'weston-launch',
'weston-launch.c',
- dependencies: [dep_pam, systemd_dep, dep_libdrm],
+ dependencies: deps_weston_launch,
include_directories: common_inc,
install: true
)
diff --git a/libweston/weston-launch.c b/libweston/weston-launch.c
index 8a711b4..54c567a 100644
--- a/libweston/weston-launch.c
+++ b/libweston/weston-launch.c
@@ -51,7 +51,9 @@
#include <pwd.h>
#include <grp.h>
+#ifdef HAVE_PAM
#include <security/pam_appl.h>
+#endif
#ifdef HAVE_SYSTEMD_LOGIN
#include <systemd/sd-login.h>
@@ -100,8 +102,10 @@ drmSetMaster(int drm_fd)
#endif
struct weston_launch {
+#ifdef HAVE_PAM
struct pam_conv pc;
pam_handle_t *ph;
+#endif
int tty;
int ttynr;
int sock[2];
@@ -192,6 +196,7 @@ weston_launch_allowed(struct weston_launch *wl)
return false;
}
+#ifdef HAVE_PAM
static int
pam_conversation_fn(int msg_count,
const struct pam_message **messages,
@@ -232,6 +237,7 @@ setup_pam(struct weston_launch *wl)
return 0;
}
+#endif
static int
setup_launcher_socket(struct weston_launch *wl)
@@ -431,6 +437,7 @@ quit(struct weston_launch *wl, int status)
close(wl->signalfd);
close(wl->sock[0]);
+#ifdef HAVE_PAM
if (wl->new_user) {
err = pam_close_session(wl->ph, 0);
if (err)
@@ -438,6 +445,7 @@ quit(struct weston_launch *wl, int status)
err, pam_strerror(wl->ph, err));
pam_end(wl->ph, err);
}
+#endif
if (ioctl(wl->tty, KDSKBMUTE, 0) &&
ioctl(wl->tty, KDSKBMODE, wl->kb_mode))
@@ -666,6 +674,7 @@ setup_session(struct weston_launch *wl, char **child_argv)
setenv("HOME", wl->pw->pw_dir, 1);
setenv("SHELL", wl->pw->pw_shell, 1);
+#ifdef HAVE_PAM
env = pam_getenvlist(wl->ph);
if (env) {
for (i = 0; env[i]; ++i) {
@@ -674,6 +683,7 @@ setup_session(struct weston_launch *wl, char **child_argv)
}
free(env);
}
+#endif
/*
* We open a new session, so it makes sense
@@ -745,8 +755,10 @@ static void
help(const char *name)
{
fprintf(stderr, "Usage: %s [args...] [-- [weston args..]]\n", name);
+#ifdef HAVE_PAM
fprintf(stderr, " -u, --user Start session as specified username,\n"
" e.g. -u joe, requires root.\n");
+#endif
fprintf(stderr, " -t, --tty Start session on alternative tty,\n"
" e.g. -t /dev/tty4, requires -u option.\n");
fprintf(stderr, " -v, --verbose Be verbose\n");
@@ -760,7 +772,9 @@ main(int argc, char *argv[])
int i, c;
char *tty = NULL;
struct option opts[] = {
+#ifdef HAVE_PAM
{ "user", required_argument, NULL, 'u' },
+#endif
{ "tty", required_argument, NULL, 't' },
{ "verbose", no_argument, NULL, 'v' },
{ "help", no_argument, NULL, 'h' },
@@ -772,11 +786,16 @@ main(int argc, char *argv[])
while ((c = getopt_long(argc, argv, "u:t:vh", opts, &i)) != -1) {
switch (c) {
case 'u':
+#ifdef HAVE_PAM
wl.new_user = optarg;
if (getuid() != 0) {
fprintf(stderr, "weston: Permission denied. -u allowed for root only\n");
exit(EXIT_FAILURE);
}
+#else
+ fprintf(stderr, "weston: -u is unsupported in this weston-launch build\n");
+ exit(EXIT_FAILURE);
+#endif
break;
case 't':
tty = optarg;
@@ -828,8 +847,10 @@ main(int argc, char *argv[])
if (setup_tty(&wl, tty) < 0)
exit(EXIT_FAILURE);
+#ifdef HAVE_PAM
if (wl.new_user && setup_pam(&wl) < 0)
exit(EXIT_FAILURE);
+#endif
if (setup_launcher_socket(&wl) < 0)
exit(EXIT_FAILURE);
diff --git a/meson_options.txt b/meson_options.txt
index c862ecc..73ef2c3 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -73,6 +73,13 @@ option(
)
option(
+ 'pam',
+ type: 'boolean',
+ value: true,
+ description: 'Define if PAM is available'
+)
+
+option(
'xwayland',
type: 'boolean',
value: true,
|
