Signed-off-by: Glenn Washburn <[email protected]>
---
grub-core/disk/loopback.c | 56 +++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/grub-core/disk/loopback.c b/grub-core/disk/loopback.c
index cdf9123fa..6a2be257b 100644
--- a/grub-core/disk/loopback.c
+++ b/grub-core/disk/loopback.c
@@ -21,6 +21,7 @@
#include <grub/misc.h>
#include <grub/file.h>
#include <grub/disk.h>
+#include <grub/procfs.h>
#include <grub/mm.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
@@ -229,6 +230,60 @@ static struct grub_disk_dev grub_loopback_dev =
.next = 0
};
+
+/* Open a file named NAME and initialize FILE. */
+#define STR(s) #s
+#define MAX_ID_PRINT 10000
+static char *
+loopbacks_get (grub_size_t *sz)
+{
+ struct grub_loopback *i;
+ grub_size_t size = 0;
+ char *ptr, *ret;
+ const char header[] = N_("<id> <devname> <filename>\n");
+ static char errmsg[] = N_("Can not list more than " STR(MAX_ID_PRINT)
+ " loopback devices.\n");
+
+ for (i = loopback_list; i != NULL; i = i->next)
+ if (i->id < MAX_ID_PRINT)
+ {
+ /* id + spaces + '\n' */
+ size += sizeof (STR(MAX_ID_PRINT)) + 2 + 1;
+ size += grub_strlen (i->devname);
+ size += grub_strlen (i->file->name);
+ }
+ else
+ {
+ *sz = sizeof (errmsg);
+ return errmsg;
+ }
+
+ ret = grub_malloc (sizeof (header) + size + 1);
+ if (!ret)
+ return 0;
+
+ ptr = grub_stpcpy (ret, header);
+
+ for (i = loopback_list; i != NULL; i = i->next)
+ {
+ ptr += grub_snprintf (ptr, 21, "%lu ", i->id);
+ ptr = grub_stpcpy (ptr, i->devname);
+ *ptr++ = ' ';
+ ptr = grub_stpcpy (ptr, i->file->name);
+ *ptr++ = '\n';
+ }
+ *ptr = '\0';
+ *sz = ptr - ret;
+ return ret;
+}
+
+struct grub_procfs_entry loopbacks =
+{
+ .name = "loopbacks",
+ .get_contents = loopbacks_get
+};
+
+
static grub_extcmd_t cmd;
GRUB_MOD_INIT(loopback)
@@ -239,6 +294,7 @@ GRUB_MOD_INIT(loopback)
or transformed into drive. */
N_("Make a virtual drive from a file."), options);
grub_disk_dev_register (&grub_loopback_dev);
+ grub_procfs_register ("loopbacks", &loopbacks);
}
GRUB_MOD_FINI(loopback)
--
2.25.1
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