| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * fsetflags.c - Set a file flags 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 <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | #if HAVE_EXT2_IOCTLS |
| 32 | #include <fcntl.h> |
| 33 | #include <sys/ioctl.h> |
| 34 | #endif |
| 35 | |
| 36 | #include "e2p.h" |
| 37 | |
| 38 | /* |
| 39 | * Deal with lame glibc's that define this function without actually |
| 40 | * implementing it. Can you say "attractive nuisance", boys and girls? |
| 41 | * I knew you could! |
| 42 | */ |
| 43 | #ifdef __linux__ |
| 44 | #undef HAVE_CHFLAGS |
| 45 | #endif |
| 46 | |
| 47 | #ifdef O_LARGEFILE |
| 48 | #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE) |
| 49 | #else |
| 50 | #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK) |
| 51 | #endif |
| 52 | |
| 53 | int fsetflags (const char * name, unsigned long flags) |
| 54 | { |
| 55 | #if HAVE_CHFLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS) |
| 56 | unsigned long bsd_flags = 0; |
| 57 | |
| 58 | #ifdef UF_IMMUTABLE |
| 59 | if (flags & EXT2_IMMUTABLE_FL) |
| 60 | bsd_flags |= UF_IMMUTABLE; |
| 61 | #endif |
| 62 | #ifdef UF_APPEND |
| 63 | if (flags & EXT2_APPEND_FL) |
| 64 | bsd_flags |= UF_APPEND; |
| 65 | #endif |
| 66 | #ifdef UF_NODUMP |
| 67 | if (flags & EXT2_NODUMP_FL) |
| 68 | bsd_flags |= UF_NODUMP; |
| 69 | #endif |
| 70 | |
| 71 | return chflags (name, bsd_flags); |
| 72 | #else /* !HAVE_CHFLAGS || (APPLE_DARWIN && HAVE_EXT2_IOCTLS) */ |
| 73 | #if HAVE_EXT2_IOCTLS |
| 74 | int fd, r, f, save_errno = 0; |
| 75 | struct stat buf; |
| 76 | |
| 77 | if (!lstat(name, &buf) && |
| 78 | !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) { |
| 79 | goto notsupp; |
| 80 | } |
| 81 | #if !APPLE_DARWIN |
| 82 | fd = open (name, OPEN_FLAGS); |
| 83 | if (fd == -1) |
| 84 | return -1; |
| 85 | f = (int) flags; |
| 86 | r = ioctl (fd, EXT2_IOC_SETFLAGS, &f); |
| 87 | if (r == -1) |
| 88 | save_errno = errno; |
| 89 | close (fd); |
| 90 | if (save_errno) |
| 91 | errno = save_errno; |
| 92 | #else /* APPLE_DARWIN */ |
| 93 | f = (int) flags; |
| 94 | return syscall(SYS_fsctl, name, EXT2_IOC_SETFLAGS, &f, 0); |
| 95 | #endif /* !APPLE_DARWIN */ |
| 96 | return r; |
| 97 | |
| 98 | notsupp: |
| 99 | #endif /* HAVE_EXT2_IOCTLS */ |
| 100 | #endif |
| 101 | errno = EOPNOTSUPP; |
| 102 | return -1; |
| 103 | } |