1 /* 2 * fgetversion.c - Get a file version on an ext2 file system 3 * 4 * Copyright (C) 1993, 1994 Remy Card <card (at) masi.ibp.fr> 5 * Laboratoire MASI, Institut Blaise Pascal 6 * Universite Pierre et Marie Curie (Paris VI) 7 * 8 * %Begin-Header% 9 * This file may be redistributed under the terms of the GNU Library 10 * General Public License, version 2. 11 * %End-Header% 12 */ 13 14 /* 15 * History: 16 * 93/10/30 - Creation 17 */ 18 19 #define _LARGEFILE_SOURCE 20 #define _LARGEFILE64_SOURCE 21 22 #if HAVE_ERRNO_H 23 #include <errno.h> 24 #endif 25 #if HAVE_UNISTD_H 26 #include <unistd.h> 27 #endif 28 #include <fcntl.h> 29 #include <sys/ioctl.h> 30 31 #include "e2p.h" 32 33 #ifdef O_LARGEFILE 34 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE) 35 #else 36 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK) 37 #endif 38 39 int fgetversion (const char * name, unsigned long * version) 40 { 41 #if HAVE_EXT2_IOCTLS 42 #if !APPLE_DARWIN 43 int fd, r, ver, save_errno = 0; 44 45 fd = open (name, OPEN_FLAGS); 46 if (fd == -1) 47 return -1; 48 r = ioctl (fd, EXT2_IOC_GETVERSION, &ver); 49 if (r == -1) 50 save_errno = errno; 51 *version = ver; 52 close (fd); 53 if (save_errno) 54 errno = save_errno; 55 return r; 56 #else 57 int ver=-1, err; 58 err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0); 59 *version = ver; 60 return(err); 61 #endif 62 #else /* ! HAVE_EXT2_IOCTLS */ 63 extern int errno; 64 errno = EOPNOTSUPP; 65 return -1; 66 #endif /* ! HAVE_EXT2_IOCTLS */ 67 } 68
