| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * fgetversion.c - Get a file version on an ext2 file system |
| 3 | * |
| 4 | * Copyright (C) 1993, 1994 Remy Card <card@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 | #include "config.h" |
| 23 | #if HAVE_ERRNO_H |
| 24 | #include <errno.h> |
| 25 | #endif |
| 26 | #if HAVE_UNISTD_H |
| 27 | #include <unistd.h> |
| 28 | #endif |
| 29 | #include <fcntl.h> |
| 30 | #include <sys/ioctl.h> |
| 31 | |
| 32 | #include "e2p.h" |
| 33 | |
| 34 | #ifdef O_LARGEFILE |
| 35 | #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE) |
| 36 | #else |
| 37 | #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK) |
| 38 | #endif |
| 39 | |
| 40 | int fgetversion (const char * name, unsigned long * version) |
| 41 | { |
| 42 | #if HAVE_EXT2_IOCTLS |
| 43 | #if !APPLE_DARWIN |
| 44 | int fd, r, ver, save_errno = 0; |
| 45 | |
| 46 | fd = open (name, OPEN_FLAGS); |
| 47 | if (fd == -1) |
| 48 | return -1; |
| 49 | r = ioctl (fd, EXT2_IOC_GETVERSION, &ver); |
| 50 | if (r == -1) |
| 51 | save_errno = errno; |
| 52 | *version = ver; |
| 53 | close (fd); |
| 54 | if (save_errno) |
| 55 | errno = save_errno; |
| 56 | return r; |
| 57 | #else |
| 58 | int ver=-1, err; |
| 59 | err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0); |
| 60 | *version = ver; |
| 61 | return(err); |
| 62 | #endif |
| 63 | #else /* ! HAVE_EXT2_IOCTLS */ |
| 64 | extern int errno; |
| 65 | errno = EOPNOTSUPP; |
| 66 | return -1; |
| 67 | #endif /* ! HAVE_EXT2_IOCTLS */ |
| 68 | } |