[PATCH 1/6] procfs: implement /proc/N/mounts

[Justus Winter]

* procfs/process.c (process_gc_mounts): New function.
(process_symlink_make_node): Likewise.
(entries): Use the new functions to provide a symlink to ../mounts.
---
 procfs/process.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/procfs/process.c b/procfs/process.c
index a9b1a59..f5da0d2 100644
--- a/procfs/process.c
+++ b/procfs/process.c
@@ -202,6 +202,16 @@ process_file_gc_maps (struct proc_stat *ps, char 
**contents)
   return contents_len;
 }
 
+static error_t
+process_gc_mounts  (void *hook, char **contents, ssize_t *contents_len)
+{
+#define MOUNTSLINK     "../mounts"
+  *contents = MOUNTSLINK;
+  *contents_len = sizeof MOUNTSLINK - 1;
+#undef MOUNTSLINK
+  return 0;
+}
+
 static ssize_t
 process_file_gc_stat (struct proc_stat *ps, char **contents)
 {
@@ -420,6 +430,14 @@ process_stat_make_node (void *dir_hook, const void 
*entry_hook)
   return np;
 }
 
+static struct node *
+process_symlink_make_node (void *dir_hook, const void *entry_hook)
+{
+  struct node *np = procfs_make_node (entry_hook, dir_hook);
+  if (np)
+    procfs_node_chtype (np, S_IFLNK);
+  return np;
+}
 
 /* Implementation of the process directory per se.  */
 
@@ -450,6 +468,15 @@ static struct procfs_dir_entry entries[] = {
     },
   },
   {
+    .name = "mounts",
+    .hook = & (struct procfs_node_ops) {
+      .get_contents = process_gc_mounts,
+    },
+    .ops = {
+      .make_node = process_symlink_make_node,
+    },
+  },
+  {
     .name = "stat",
     .hook = & (struct process_file_desc) {
       .get_contents = process_file_gc_stat,
-- 
2.1.0