[gnome-shell] shell_global_reexec_self: add support for FreeBSD

[Ting-Wei Lan <lantw src gnome org>]

commit e4718d3f7fb17bb98218455573617d0269b34a1c
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Mon Apr 13 12:07:35 2015 +0800

    shell_global_reexec_self: add support for FreeBSD
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747788

 src/shell-global.c |   28 ++++++++++++++++++++++++++--
 1 files changed, 26 insertions(+), 2 deletions(-)
---
diff --git a/src/shell-global.c b/src/shell-global.c
index af99747..acd5c80 100644
--- a/src/shell-global.c
+++ b/src/shell-global.c
@@ -39,7 +39,7 @@
 #include <malloc.h>
 #endif
 
-#ifdef __OpenBSD__
+#if defined __OpenBSD__ || defined __FreeBSD__
 #include <sys/sysctl.h>
 #endif
 
@@ -1279,6 +1279,30 @@ shell_global_reexec_self (ShellGlobal *global)
   }
 
   g_ptr_array_add (arr, NULL);
+#elif defined __FreeBSD__
+  char *buf;
+  char *buf_p;
+  char *buf_end;
+  gint mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ARGS, getpid() };
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
+    return;
+
+  buf = g_malloc0 (len);
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), buf, &len, NULL, 0) == -1) {
+    g_warning ("failed to get command line args: %d", errno);
+    g_free (buf);
+    return;
+  }
+
+  buf_end = buf+len;
+  arr = g_ptr_array_new ();
+  /* The value returned by sysctl is NUL-separated */
+  for (buf_p = buf; buf_p < buf_end; buf_p = buf_p + strlen (buf_p) + 1)
+    g_ptr_array_add (arr, buf_p);
+
+  g_ptr_array_add (arr, NULL);
 #else
   return;
 #endif
@@ -1297,7 +1321,7 @@ shell_global_reexec_self (ShellGlobal *global)
   execvp (arr->pdata[0], (char**)arr->pdata);
   g_warning ("failed to reexec: %s", g_strerror (errno));
   g_ptr_array_free (arr, TRUE);
-#if defined __linux__
+#if defined __linux__ || defined __FreeBSD__
   g_free (buf);
 #elif defined __OpenBSD__
   g_free (args);