[1765] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * See README for additional information
|
---|
| 4 | *
|
---|
| 5 | * This file can be redistributed under the terms of the GNU Library General
|
---|
| 6 | * Public License
|
---|
| 7 | */
|
---|
| 8 |
|
---|
| 9 | #include "libbb.h"
|
---|
| 10 | #include "e2fs_lib.h"
|
---|
| 11 |
|
---|
| 12 | #define HAVE_EXT2_IOCTLS 1
|
---|
| 13 |
|
---|
| 14 | #if INT_MAX == LONG_MAX
|
---|
| 15 | #define IF_LONG_IS_SAME(...) __VA_ARGS__
|
---|
| 16 | #define IF_LONG_IS_WIDER(...)
|
---|
| 17 | #else
|
---|
| 18 | #define IF_LONG_IS_SAME(...)
|
---|
| 19 | #define IF_LONG_IS_WIDER(...) __VA_ARGS__
|
---|
| 20 | #endif
|
---|
| 21 |
|
---|
| 22 | static void close_silently(int fd)
|
---|
| 23 | {
|
---|
| 24 | int e = errno;
|
---|
| 25 | close(fd);
|
---|
| 26 | errno = e;
|
---|
| 27 | }
|
---|
| 28 |
|
---|
| 29 |
|
---|
| 30 | /* Iterate a function on each entry of a directory */
|
---|
| 31 | int iterate_on_dir(const char *dir_name,
|
---|
| 32 | int (*func)(const char *, struct dirent *, void *),
|
---|
| 33 | void * private)
|
---|
| 34 | {
|
---|
| 35 | DIR *dir;
|
---|
| 36 | struct dirent *de, *dep;
|
---|
| 37 | int max_len, len;
|
---|
| 38 |
|
---|
| 39 | max_len = PATH_MAX + sizeof(struct dirent);
|
---|
| 40 | de = xmalloc(max_len+1);
|
---|
| 41 | memset(de, 0, max_len+1);
|
---|
| 42 |
|
---|
| 43 | dir = opendir(dir_name);
|
---|
| 44 | if (dir == NULL) {
|
---|
| 45 | free(de);
|
---|
| 46 | return -1;
|
---|
| 47 | }
|
---|
| 48 | while ((dep = readdir(dir))) {
|
---|
| 49 | len = sizeof(struct dirent);
|
---|
| 50 | if (len < dep->d_reclen)
|
---|
| 51 | len = dep->d_reclen;
|
---|
| 52 | if (len > max_len)
|
---|
| 53 | len = max_len;
|
---|
| 54 | memcpy(de, dep, len);
|
---|
| 55 | func(dir_name, de, private);
|
---|
| 56 | }
|
---|
| 57 | closedir(dir);
|
---|
| 58 | free(de);
|
---|
| 59 | return 0;
|
---|
| 60 | }
|
---|
| 61 |
|
---|
| 62 |
|
---|
| 63 | /* Get/set a file version on an ext2 file system */
|
---|
| 64 | int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version)
|
---|
| 65 | {
|
---|
| 66 | #if HAVE_EXT2_IOCTLS
|
---|
| 67 | int fd, r;
|
---|
| 68 | IF_LONG_IS_WIDER(int ver;)
|
---|
| 69 |
|
---|
| 70 | fd = open(name, O_NONBLOCK);
|
---|
| 71 | if (fd == -1)
|
---|
| 72 | return -1;
|
---|
| 73 | if (!get_version) {
|
---|
| 74 | IF_LONG_IS_WIDER(
|
---|
| 75 | ver = (int) set_version;
|
---|
| 76 | r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
|
---|
| 77 | )
|
---|
| 78 | IF_LONG_IS_SAME(
|
---|
| 79 | r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version);
|
---|
| 80 | )
|
---|
| 81 | } else {
|
---|
| 82 | IF_LONG_IS_WIDER(
|
---|
| 83 | r = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
|
---|
| 84 | *get_version = ver;
|
---|
| 85 | )
|
---|
| 86 | IF_LONG_IS_SAME(
|
---|
| 87 | r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version);
|
---|
| 88 | )
|
---|
| 89 | }
|
---|
| 90 | close_silently(fd);
|
---|
| 91 | return r;
|
---|
| 92 | #else /* ! HAVE_EXT2_IOCTLS */
|
---|
| 93 | errno = EOPNOTSUPP;
|
---|
| 94 | return -1;
|
---|
| 95 | #endif /* ! HAVE_EXT2_IOCTLS */
|
---|
| 96 | }
|
---|
| 97 |
|
---|
| 98 |
|
---|
| 99 | /* Get/set a file flags on an ext2 file system */
|
---|
| 100 | int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
|
---|
| 101 | {
|
---|
| 102 | #if HAVE_EXT2_IOCTLS
|
---|
| 103 | struct stat buf;
|
---|
| 104 | int fd, r;
|
---|
| 105 | IF_LONG_IS_WIDER(int f;)
|
---|
| 106 |
|
---|
| 107 | if (stat(name, &buf) == 0 /* stat is ok */
|
---|
| 108 | && !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
|
---|
| 109 | ) {
|
---|
| 110 | goto notsupp;
|
---|
| 111 | }
|
---|
| 112 | fd = open(name, O_NONBLOCK); /* neither read nor write asked for */
|
---|
| 113 | if (fd == -1)
|
---|
| 114 | return -1;
|
---|
| 115 |
|
---|
| 116 | if (!get_flags) {
|
---|
| 117 | IF_LONG_IS_WIDER(
|
---|
| 118 | f = (int) set_flags;
|
---|
| 119 | r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
|
---|
| 120 | )
|
---|
| 121 | IF_LONG_IS_SAME(
|
---|
| 122 | r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags);
|
---|
| 123 | )
|
---|
| 124 | } else {
|
---|
| 125 | IF_LONG_IS_WIDER(
|
---|
| 126 | r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
|
---|
| 127 | *get_flags = f;
|
---|
| 128 | )
|
---|
| 129 | IF_LONG_IS_SAME(
|
---|
| 130 | r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags);
|
---|
| 131 | )
|
---|
| 132 | }
|
---|
| 133 |
|
---|
| 134 | close_silently(fd);
|
---|
| 135 | return r;
|
---|
| 136 | notsupp:
|
---|
| 137 | #endif /* HAVE_EXT2_IOCTLS */
|
---|
| 138 | errno = EOPNOTSUPP;
|
---|
| 139 | return -1;
|
---|
| 140 | }
|
---|
| 141 |
|
---|
| 142 |
|
---|
| 143 | /* Print file attributes on an ext2 file system */
|
---|
| 144 | struct flags_name {
|
---|
| 145 | unsigned long flag;
|
---|
| 146 | char short_name;
|
---|
| 147 | const char *long_name;
|
---|
| 148 | };
|
---|
| 149 |
|
---|
| 150 | /* TODO: apart from I and (disabled) COMPRESSION flags, this
|
---|
| 151 | * is a duplicate of a table from chattr. Merge? */
|
---|
| 152 | static const struct flags_name flags_array[] = {
|
---|
| 153 | { EXT2_SECRM_FL, 's', "Secure_Deletion" },
|
---|
| 154 | { EXT2_UNRM_FL, 'u' , "Undelete" },
|
---|
| 155 | { EXT2_SYNC_FL, 'S', "Synchronous_Updates" },
|
---|
| 156 | { EXT2_DIRSYNC_FL, 'D', "Synchronous_Directory_Updates" },
|
---|
| 157 | { EXT2_IMMUTABLE_FL, 'i', "Immutable" },
|
---|
| 158 | { EXT2_APPEND_FL, 'a', "Append_Only" },
|
---|
| 159 | { EXT2_NODUMP_FL, 'd', "No_Dump" },
|
---|
| 160 | { EXT2_NOATIME_FL, 'A', "No_Atime" },
|
---|
| 161 | { EXT2_COMPR_FL, 'c', "Compression_Requested" },
|
---|
| 162 | #ifdef ENABLE_COMPRESSION
|
---|
| 163 | { EXT2_COMPRBLK_FL, 'B', "Compressed_File" },
|
---|
| 164 | { EXT2_DIRTY_FL, 'Z', "Compressed_Dirty_File" },
|
---|
| 165 | { EXT2_NOCOMPR_FL, 'X', "Compression_Raw_Access" },
|
---|
| 166 | { EXT2_ECOMPR_FL, 'E', "Compression_Error" },
|
---|
| 167 | #endif
|
---|
| 168 | { EXT3_JOURNAL_DATA_FL, 'j', "Journaled_Data" },
|
---|
| 169 | { EXT2_INDEX_FL, 'I', "Indexed_directory" },
|
---|
| 170 | { EXT2_NOTAIL_FL, 't', "No_Tailmerging" },
|
---|
| 171 | { EXT2_TOPDIR_FL, 'T', "Top_of_Directory_Hierarchies" },
|
---|
| 172 | { 0, '\0', NULL }
|
---|
| 173 | };
|
---|
| 174 |
|
---|
| 175 | void print_flags(FILE *f, unsigned long flags, unsigned options)
|
---|
| 176 | {
|
---|
| 177 | const struct flags_name *fp;
|
---|
| 178 |
|
---|
| 179 | if (options & PFOPT_LONG) {
|
---|
| 180 | int first = 1;
|
---|
| 181 | for (fp = flags_array; fp->short_name; fp++) {
|
---|
| 182 | if (flags & fp->flag) {
|
---|
| 183 | if (!first)
|
---|
| 184 | fputs(", ", f);
|
---|
| 185 | fputs(fp->long_name, f);
|
---|
| 186 | first = 0;
|
---|
| 187 | }
|
---|
| 188 | }
|
---|
| 189 | if (first)
|
---|
| 190 | fputs("---", f);
|
---|
| 191 | } else {
|
---|
| 192 | for (fp = flags_array; fp->short_name; fp++) {
|
---|
| 193 | char c = '-';
|
---|
| 194 | if (flags & fp->flag)
|
---|
| 195 | c = fp->short_name;
|
---|
| 196 | fputc(c, f);
|
---|
| 197 | }
|
---|
| 198 | }
|
---|
| 199 | }
|
---|