| /* |
| * 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 */ |
| extern int errno; |
| |
| errno = EOPNOTSUPP; |
| #endif /* ! HAVE_EXT2_IOCTLS */ |
| if (rc == 0) |
| *version = ver; |
| |
| return rc; |
| } |