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-rw-r--r--lib/e2p/fgetversion.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/e2p/fgetversion.c b/lib/e2p/fgetversion.c
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+++ b/lib/e2p/fgetversion.c
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+/*
+ * fgetversion.c - Get 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)
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+/*
+ * History:
+ * 93/10/30 - Creation
+ */
+
+#ifndef _LARGEFILE_SOURCE
+#define _LARGEFILE_SOURCE
+#endif
+#ifndef _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE
+#endif
+
+#include "config.h"
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#if HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#include "e2p.h"
+
+#ifdef O_LARGEFILE
+#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
+#else
+#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
+#endif
+
+int fgetversion(const char *name, unsigned long *version)
+{
+ unsigned int ver = -1;
+ int rc = -1;
+#if HAVE_EXT2_IOCTLS
+# if !APPLE_DARWIN
+ int fd, save_errno = 0;
+
+ fd = open(name, OPEN_FLAGS);
+ if (fd == -1)
+ return -1;
+
+ rc = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
+ if (rc == -1)
+ save_errno = errno;
+ close(fd);
+ if (rc == -1)
+ errno = save_errno;
+# else /* APPLE_DARWIN */
+ rc = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
+# endif /* !APPLE_DARWIN */
+#else /* ! HAVE_EXT2_IOCTLS */
+ errno = EOPNOTSUPP;
+#endif /* ! HAVE_EXT2_IOCTLS */
+ if (rc == 0)
+ *version = ver;
+
+ return rc;
+}