add procfs-filesystems.patch

2 files changed, 99 insertions, 0 deletions

diff --git a/debian/patches/procfs-filesystems.patch b/debian/patches/procfs-filesystems.patch
new file mode 100644
index 00000000..7205c7f1
--- /dev/null
+++ b/debian/patches/procfs-filesystems.patch
@@ -0,0 +1,98 @@
+From 4b2ab4810ef918cbc4c8bdb9a6f1476e70accace Mon Sep 17 00:00:00 2001
+From: Justus Winter <4winter@informatik.uni-hamburg.de>
+Date: Thu, 18 Sep 2014 19:38:04 +0200
+Subject: [PATCH] procfs: implement /proc/filesystems
+
+* procfs/rootdir.c (rootdir_gc_filesystems): New function.
+(rootdir_entries): Use the new function to implement /proc/filesystems.
+---
+ procfs/rootdir.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 59 insertions(+)
+
+diff --git a/procfs/rootdir.c b/procfs/rootdir.c
+index 0b13119..50ed0d3 100644
+--- a/procfs/rootdir.c
++++ b/procfs/rootdir.c
+@@ -32,6 +32,7 @@
+ #include <sys/stat.h>
+ #include <argz.h>
+ #include <ps.h>
++#include <glob.h>
+ #include "procfs.h"
+ #include "procfs_dir.h"
+ #include "main.h"
+@@ -535,6 +536,57 @@ rootdir_gc_slabinfo (void *hook, char **contents, ssize_t *contents_len)
+                  cache_info, cache_info_count * sizeof *cache_info);
+   return err;
+ }
++
++static error_t
++rootdir_gc_filesystems (void *hook, char **contents, ssize_t *contents_len)
++{
++  error_t err = 0;
++  size_t i;
++  int glob_ret;
++  glob_t matches;
++  FILE *m;
++
++  m = open_memstream (contents, contents_len);
++  if (m == NULL)
++    return errno;
++
++  glob_ret = glob (_HURD "*fs", 0, NULL, &matches);
++  switch (glob_ret)
++    {
++    case 0:
++      for (i = 0; i < matches.gl_pathc; i++)
++	{
++	  /* Get ith entry, shave off the prefix.  */
++	  char *name = &matches.gl_pathv[i][sizeof _HURD - 1];
++
++	  /* Linux naming convention is a bit inconsistent.  */
++	  if (strncmp (name, "ext", 3) == 0
++	      || strcmp (name, "procfs") == 0)
++	    /* Drop the fs suffix.  */
++	    name[strlen (name) - 2] = 0;
++
++	  fprintf (m, "\t%s\n", name);
++	}
++
++      globfree (&matches);
++      break;
++
++    case GLOB_NOMATCH:
++      /* Poor fellow.  */
++      break;
++
++    case GLOB_NOSPACE:
++      err = ENOMEM;
++      break;
++
++    default:
++      /* This should not happen.  */
++      err = EGRATUITOUS;
++    }
++
++  fclose (m);
++  return err;
++}
+ 
+ /* Glue logic and entries table */
+ 
+@@ -635,6 +687,13 @@ static const struct procfs_dir_entry rootdir_entries[] = {
+       .cleanup_contents = procfs_cleanup_contents_with_free,
+     },
+   },
++  {
++    .name = "filesystems",
++    .hook = & (struct procfs_node_ops) {
++      .get_contents = rootdir_gc_filesystems,
++      .cleanup_contents = procfs_cleanup_contents_with_free,
++    },
++  },
+ #ifdef PROFILE
+   /* In order to get a usable gmon.out file, we must apparently use exit(). */
+   {
+-- 
+2.1.0
+
diff --git a/debian/patches/series b/debian/patches/series
index 3097cc18..cfb74254 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -61,3 +61,4 @@ mach-defpager-protected-payload.patch
 0001-libdiskfs-remove-code-counting-cache-misses.patch
 trans-crash-add-verbose.patch
 procfs-maps.patch
+procfs-filesystems.patch