summaryrefslogtreecommitdiff
path: root/e2fsprogs/e2p/fgetsetversion.c
diff options
context:
space:
mode:
Diffstat (limited to 'e2fsprogs/e2p/fgetsetversion.c')
-rw-r--r--e2fsprogs/e2p/fgetsetversion.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/e2fsprogs/e2p/fgetsetversion.c b/e2fsprogs/e2p/fgetsetversion.c
new file mode 100644
index 0000000..dcf127c
--- /dev/null
+++ b/e2fsprogs/e2p/fgetsetversion.c
@@ -0,0 +1,69 @@
+/*
+ * fgetversion.c - Get a file version on an ext2 file system
+ * fsetversion.c - Set a file version on an ext2 file system
+ *
+ *
+ * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
+ * Laboratoire MASI, Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * This file can be redistributed under the terms of the GNU Library General
+ * Public License
+ */
+
+/*
+ * History:
+ * 93/10/30 - Creation
+ */
+
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include "e2p.h"
+
+#ifdef O_LARGEFILE
+#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
+#else
+#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
+#endif
+
+/*
+ To do fsetversion: unsigned long *ptr_version must be set to NULL.
+ and unsigned long version must be set to a value
+ To do fgetversion: unsigned long *ptr_version must NOT be set to NULL
+ and unsigned long version is ignored.
+ TITO.
+*/
+
+int fgetsetversion (const char * name, unsigned long * get_version, unsigned long set_version)
+{
+#if HAVE_EXT2_IOCTLS
+ int fd, r, ver, save_errno = 0;
+
+ fd = open (name, OPEN_FLAGS);
+ if (fd == -1)
+ return -1;
+ if (!get_version) {
+ ver = (int) set_version;
+ r = ioctl (fd, EXT2_IOC_SETVERSION, &ver);
+ } else {
+ r = ioctl (fd, EXT2_IOC_GETVERSION, &ver);
+ *get_version = ver;
+ }
+ if (r == -1)
+ save_errno = errno;
+ close (fd);
+ if (save_errno)
+ errno = save_errno;
+ return r;
+#else /* ! HAVE_EXT2_IOCTLS */
+ errno = EOPNOTSUPP;
+ return -1;
+#endif /* ! HAVE_EXT2_IOCTLS */
+}