fontconfig libxcb mesa xserver git update 24 Mar 2014

xserver          commit bf087659f0fb747c471e26c5b287c35877818040
libxcb           commit e2813e1cde893f384fa620ff3c13493beebabe0c
fontconfig       commit 9260b7ec39c34ce68d74e16d47917290a8c3f35a
mesa             commit 0d99aef6c8a940e52afcbffa7091ff9c854ba120

1 files changed, 231 insertions, 0 deletions

diff --git a/xorg-server/hw/xfree86/xorg-wrapper.c b/xorg-server/hw/xfree86/xorg-wrapper.c
new file mode 100644
index 000000000..90c8c11ef
--- /dev/null
+++ b/xorg-server/hw/xfree86/xorg-wrapper.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright © 2014 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include "dix-config.h"
+
+#include <fcntl.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <drm/drm.h>
+#include <xf86drm.h> /* For DRM_DEV_NAME */
+
+#define CONFIG_FILE SYSCONFDIR "/X11/Xwrapper.config"
+
+enum { ROOT_ONLY, CONSOLE_ONLY, ANYBODY };
+
+/* KISS non locale / LANG parsing isspace version */
+static int is_space(char c)
+{
+    return c == ' ' || c == '\t' || c == '\n';
+}
+
+static char *strip(char *s)
+{
+    int i;
+
+    /* Strip leading whitespace */
+    while (s[0] && is_space(s[0]))
+        s++;
+
+    /* Strip trailing whitespace */
+    i = strlen(s) - 1;
+    while (i >= 0 && is_space(s[i])) {
+        s[i] = 0;
+        i--;
+    }
+
+    return s;
+}
+
+static void parse_config(int *allowed, int *needs_root_rights)
+{
+    FILE *f;
+    char buf[1024];
+    char *stripped, *equals, *key, *value;
+    int line = 0;
+
+    f = fopen(CONFIG_FILE, "r");
+    if (!f)
+        return;
+
+    while (fgets(buf, sizeof(buf), f)) {
+        line++;
+
+        /* Skip comments and empty lines */
+        stripped = strip(buf);
+        if (stripped[0] == '#' || stripped[0] == 0)
+            continue;
+
+        /* Split in a key + value pair */
+        equals = strchr(stripped, '=');
+        if (!equals) {
+            fprintf(stderr, "Syntax error at %s line %d\n", CONFIG_FILE, line);
+            exit(1);
+        }
+        *equals = 0;
+        key   = strip(stripped);   /* To remove trailing whitespace from key */
+        value = strip(equals + 1); /* To remove leading whitespace from val */
+        if (!key[0]) {
+            fprintf(stderr, "Missing key at %s line %d\n", CONFIG_FILE, line);
+            exit(1);
+        }
+        if (!value[0]) {
+            fprintf(stderr, "Missing value at %s line %d\n", CONFIG_FILE, line);
+            exit(1);
+        }
+
+        /* And finally process */
+        if (strcmp(key, "allowed_users") == 0) {
+            if (strcmp(value, "rootonly") == 0)
+                *allowed = ROOT_ONLY;
+            else if (strcmp(value, "console") == 0)
+                *allowed = CONSOLE_ONLY;
+            else if (strcmp(value, "anybody") == 0)
+                *allowed = ANYBODY;
+            else {
+                fprintf(stderr,
+                    "Invalid value '%s' for 'allowed_users' at %s line %d\n",
+                    value, CONFIG_FILE, line);
+                exit(1);
+            }
+        }
+        else if (strcmp(key, "needs_root_rights") == 0) {
+            if (strcmp(value, "yes") == 0)
+                *needs_root_rights = 1;
+            else if (strcmp(value, "no") == 0)
+                *needs_root_rights = 0;
+            else if (strcmp(value, "auto") == 0)
+                *needs_root_rights = -1;
+            else {
+                fprintf(stderr,
+                    "Invalid value '%s' for 'needs_root_rights' at %s line %d\n",
+                    value, CONFIG_FILE, line);
+                exit(1);
+            }
+        }
+        else if (strcmp(key, "nice_value") == 0) {
+            /* Backward compatibility with older Debian Xwrapper, ignore */
+        }
+        else {
+            fprintf(stderr, "Invalid key '%s' at %s line %d\n", key,
+                    CONFIG_FILE, line);
+            exit(1);
+        }
+    }
+    fclose(f);
+}
+
+int main(int argc, char *argv[])
+{
+    struct drm_mode_card_res res;
+    struct stat st;
+    char buf[PATH_MAX];
+    int i, r, fd;
+    int kms_cards = 0;
+    int total_cards = 0;
+    int allowed = CONSOLE_ONLY;
+    int needs_root_rights = -1;
+
+    parse_config(&allowed, &needs_root_rights);
+
+    /* For non root users check if they are allowed to run the X server */
+    if (getuid() != 0) {
+        switch (allowed) {
+        case ROOT_ONLY:
+            /* Already checked above */
+            fprintf(stderr, "%s: Only root is allowed to run the X server\n", argv[0]);
+            exit(1);
+            break;
+        case CONSOLE_ONLY:
+            /* Some of stdin / stdout / stderr maybe redirected to a file */
+            for (i = STDIN_FILENO; i <= STDERR_FILENO; i++) {
+                r = fstat(i, &st);
+                if (r == 0 && S_ISCHR(st.st_mode) && major(st.st_rdev) == 4)
+                    break;
+            }
+            if (i > STDERR_FILENO) {
+                fprintf(stderr, "%s: Only console users are allowed to run the X server\n", argv[0]);
+                exit(1);
+            }
+            break;
+        case ANYBODY:
+            break;
+        }
+    }
+
+    /* Detect if we need root rights, except when overriden by the config */
+    if (needs_root_rights == -1) {
+        for (i = 0; i < 16; i++) {
+            snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, i);
+            fd = open(buf, O_RDWR);
+            if (fd == -1)
+                continue;
+
+            total_cards++;
+
+            memset(&res, 0, sizeof(struct drm_mode_card_res));
+            r = ioctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
+            if (r == 0 && res.count_connectors > 0)
+                kms_cards++;
+
+            close(fd);
+        }
+    }
+
+    /* If we've found cards, and all cards support kms, drop root rights */
+    if (needs_root_rights == 0 || (total_cards && kms_cards == total_cards)) {
+        gid_t realgid = getgid();
+        uid_t realuid = getuid();
+
+        if (setresgid(-1, realgid, realgid) != 0) {
+            perror("Could not drop setgid privileges");
+            exit(1);
+        }
+        if (setresuid(-1, realuid, realuid) != 0) {
+            perror("Could not drop setuid privileges");
+            exit(1);
+        }
+    }
+
+    snprintf(buf, sizeof(buf), "%s/Xorg.bin", SUID_WRAPPER_DIR);
+
+    /* Check if the server is executable by our real uid */
+    if (access(buf, X_OK) != 0) {
+        perror("Missing execute permissions for " SUID_WRAPPER_DIR "Xorg.bin");
+        exit(1);
+    }
+
+    argv[0] = buf;
+    (void) execv(argv[0], argv);
+    perror("Failed to execute " SUID_WRAPPER_DIR "/Xorg.bin");
+    exit(1);
+}