1 files changed, 94 insertions, 0 deletions
diff --git a/procfs/proclist.c b/procfs/proclist.c
new file mode 100644
index 00000000..58b942dc
--- /dev/null
+++ b/procfs/proclist.c
@@ -0,0 +1,94 @@
+/* Hurd /proc filesystem, list of processes as a directory.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <mach.h>
+#include <hurd/process.h>
+#include <ps.h>
+#include "procfs.h"
+#include "process.h"
+
+#define PID_STR_SIZE (3 * sizeof (pid_t) + 1)
+
+static error_t
+proclist_get_contents (void *hook, char **contents, ssize_t *contents_len)
+{
+  struct ps_context *pc = hook;
+  pidarray_t pids;
+  mach_msg_type_number_t num_pids;
+  error_t err;
+  int i;
+
+  num_pids = 0;
+  err = proc_getallpids (pc->server, &pids, &num_pids);
+  if (err)
+    return EIO;
+
+  *contents = malloc (num_pids * PID_STR_SIZE);
+  if (*contents)
+    {
+      *contents_len = 0;
+      for (i=0; i < num_pids; i++)
+	{
+	  int n = sprintf (*contents + *contents_len, "%d", pids[i]);
+	  assert (n >= 0);
+	  *contents_len += (n + 1);
+	}
+    }
+  else
+    err = ENOMEM;
+
+  vm_deallocate (mach_task_self (), (vm_address_t) pids, num_pids * sizeof pids[0]);
+  return err;
+}
+
+static error_t
+proclist_lookup (void *hook, const char *name, struct node **np)
+{
+  struct ps_context *pc = hook;
+  char *endp;
+  pid_t pid;
+
+  /* Self-lookups should not end up here. */
+  assert (name[0]);
+
+  /* No leading zeros allowed */
+  if (name[0] == '0' && name[1])
+    return ENOENT;
+
+  pid = strtol (name, &endp, 10);
+  if (*endp)
+    return ENOENT;
+
+  return process_lookup_pid (pc, pid, np);
+}
+
+struct node *
+proclist_make_node (struct ps_context *pc)
+{
+  static const struct procfs_node_ops ops = {
+    .get_contents = proclist_get_contents,
+    .lookup = proclist_lookup,
+    .cleanup_contents = procfs_cleanup_contents_with_free,
+  };
+  return procfs_make_node (&ops, pc);
+}
+