darwin: Buildfix for Tiger which doesn't have posix_spawn

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/launchd/user_startx/launchd_startx.c b/launchd/user_startx/launchd_startx.c
index e3fae76..f83cd61 100644
--- a/launchd/user_startx/launchd_startx.c
+++ b/launchd/user_startx/launchd_startx.c
@@ -34,11 +34,19 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <assert.h>
-#include <spawn.h>
 #include <sys/wait.h>
 #include <string.h>
 #include <stdlib.h>
 
+/* Using MIN_REQUIRED instead of MAX_ALLOWED logic due to posix_spawn not
+ * being marked with availability macros until 10.7
+ */
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
+#include <spawn.h>
+#else
+#include <errno.h>
+#endif
+
 #include "console_redirect.h"
 
 int main(int argc, char **argv, char **envp) {
@@ -56,7 +64,19 @@ int main(int argc, char **argv, char **envp) {
     xi_asl_capture_fd(aslc, NULL, ASL_LEVEL_INFO, STDOUT_FILENO);
     xi_asl_capture_fd(aslc, NULL, ASL_LEVEL_NOTICE, STDERR_FILENO);
 
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
     assert(posix_spawnp(&child, argv[1], NULL, NULL, &argv[1], envp) == 0);
+#else
+    switch(child = fork()) {
+        case -1:
+            perror("fork");
+            return errno;
+        case 0:
+            return execvp(argv[1], &argv[1]);
+        default:
+            break;
+    }
+#endif
 
     wait4(child, &pstat, 0, (struct rusage *)0);