[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * See README for additional information
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| 4 | *
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| 5 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 6 | */
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| 7 |
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| 8 | #include "libbb.h"
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| 9 | #include "e2fs_lib.h"
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| 10 |
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| 11 | #define HAVE_EXT2_IOCTLS 1
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| 12 |
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| 13 | #if INT_MAX == LONG_MAX
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| 14 | #define IF_LONG_IS_SAME(...) __VA_ARGS__
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| 15 | #define IF_LONG_IS_WIDER(...)
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| 16 | #else
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| 17 | #define IF_LONG_IS_SAME(...)
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| 18 | #define IF_LONG_IS_WIDER(...) __VA_ARGS__
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| 19 | #endif
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| 20 |
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| 21 | static void close_silently(int fd)
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| 22 | {
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| 23 | int e = errno;
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| 24 | close(fd);
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| 25 | errno = e;
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| 26 | }
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| 27 |
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| 28 |
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| 29 | /* Iterate a function on each entry of a directory */
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| 30 | int iterate_on_dir(const char *dir_name,
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| 31 | int FAST_FUNC (*func)(const char *, struct dirent *, void *),
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| 32 | void *private)
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| 33 | {
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| 34 | DIR *dir;
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| 35 | struct dirent *de;
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| 36 |
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| 37 | dir = opendir(dir_name);
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| 38 | if (dir == NULL) {
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| 39 | return -1;
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| 40 | }
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| 41 | while ((de = readdir(dir)) != NULL) {
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| 42 | func(dir_name, de, private);
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| 43 | }
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| 44 | closedir(dir);
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| 45 | return 0;
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| 46 | }
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| 47 |
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| 48 |
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| 49 | /* Get/set a file version on an ext2 file system */
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| 50 | int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version)
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| 51 | {
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| 52 | #if HAVE_EXT2_IOCTLS
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| 53 | int fd, r;
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| 54 | IF_LONG_IS_WIDER(int ver;)
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| 55 |
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| 56 | fd = open(name, O_RDONLY | O_NONBLOCK);
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| 57 | if (fd == -1)
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| 58 | return -1;
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| 59 | if (!get_version) {
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| 60 | IF_LONG_IS_WIDER(
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| 61 | ver = (int) set_version;
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| 62 | r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
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| 63 | )
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| 64 | IF_LONG_IS_SAME(
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| 65 | r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version);
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| 66 | )
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| 67 | } else {
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| 68 | IF_LONG_IS_WIDER(
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| 69 | r = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
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| 70 | *get_version = ver;
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| 71 | )
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| 72 | IF_LONG_IS_SAME(
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| 73 | r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version);
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| 74 | )
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| 75 | }
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| 76 | close_silently(fd);
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| 77 | return r;
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| 78 | #else /* ! HAVE_EXT2_IOCTLS */
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| 79 | errno = EOPNOTSUPP;
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| 80 | return -1;
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| 81 | #endif /* ! HAVE_EXT2_IOCTLS */
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| 82 | }
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| 83 |
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| 84 |
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| 85 | /* Get/set a file flags on an ext2 file system */
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| 86 | int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
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| 87 | {
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| 88 | #if HAVE_EXT2_IOCTLS
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| 89 | struct stat buf;
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| 90 | int fd, r;
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| 91 | IF_LONG_IS_WIDER(int f;)
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| 92 |
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| 93 | if (stat(name, &buf) == 0 /* stat is ok */
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| 94 | && !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
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| 95 | ) {
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| 96 | goto notsupp;
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| 97 | }
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| 98 | fd = open(name, O_RDONLY | O_NONBLOCK); /* neither read nor write asked for */
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| 99 | if (fd == -1)
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| 100 | return -1;
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| 101 |
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| 102 | if (!get_flags) {
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| 103 | IF_LONG_IS_WIDER(
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| 104 | f = (int) set_flags;
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| 105 | r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
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| 106 | )
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| 107 | IF_LONG_IS_SAME(
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| 108 | r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags);
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| 109 | )
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| 110 | } else {
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| 111 | IF_LONG_IS_WIDER(
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| 112 | r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
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| 113 | *get_flags = f;
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| 114 | )
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| 115 | IF_LONG_IS_SAME(
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| 116 | r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags);
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| 117 | )
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| 118 | }
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| 119 |
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| 120 | close_silently(fd);
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| 121 | return r;
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| 122 | notsupp:
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| 123 | #endif /* HAVE_EXT2_IOCTLS */
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| 124 | errno = EOPNOTSUPP;
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| 125 | return -1;
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| 126 | }
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| 127 |
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| 128 |
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| 129 | /* Print file attributes on an ext2 file system */
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| 130 | const uint32_t e2attr_flags_value[] = {
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| 131 | #ifdef ENABLE_COMPRESSION
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| 132 | EXT2_COMPRBLK_FL,
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| 133 | EXT2_DIRTY_FL,
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| 134 | EXT2_NOCOMPR_FL,
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| 135 | EXT2_ECOMPR_FL,
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| 136 | #endif
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| 137 | EXT2_INDEX_FL,
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| 138 | EXT2_SECRM_FL,
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| 139 | EXT2_UNRM_FL,
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| 140 | EXT2_SYNC_FL,
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| 141 | EXT2_DIRSYNC_FL,
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| 142 | EXT2_IMMUTABLE_FL,
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| 143 | EXT2_APPEND_FL,
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| 144 | EXT2_NODUMP_FL,
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| 145 | EXT2_NOATIME_FL,
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| 146 | EXT2_COMPR_FL,
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| 147 | EXT3_JOURNAL_DATA_FL,
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| 148 | EXT2_NOTAIL_FL,
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| 149 | EXT2_TOPDIR_FL
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| 150 | };
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| 151 |
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| 152 | const char e2attr_flags_sname[] =
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| 153 | #ifdef ENABLE_COMPRESSION
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| 154 | "BZXE"
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| 155 | #endif
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| 156 | "I"
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| 157 | "suSDiadAcjtT";
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| 158 |
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| 159 | static const char e2attr_flags_lname[] =
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| 160 | #ifdef ENABLE_COMPRESSION
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| 161 | "Compressed_File" "\0"
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| 162 | "Compressed_Dirty_File" "\0"
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| 163 | "Compression_Raw_Access" "\0"
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| 164 | "Compression_Error" "\0"
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| 165 | #endif
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| 166 | "Indexed_directory" "\0"
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| 167 | "Secure_Deletion" "\0"
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| 168 | "Undelete" "\0"
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| 169 | "Synchronous_Updates" "\0"
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| 170 | "Synchronous_Directory_Updates" "\0"
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| 171 | "Immutable" "\0"
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| 172 | "Append_Only" "\0"
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| 173 | "No_Dump" "\0"
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| 174 | "No_Atime" "\0"
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| 175 | "Compression_Requested" "\0"
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| 176 | "Journaled_Data" "\0"
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| 177 | "No_Tailmerging" "\0"
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| 178 | "Top_of_Directory_Hierarchies" "\0"
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| 179 | /* Another trailing NUL is added by compiler */;
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| 180 |
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| 181 | void print_e2flags(FILE *f, unsigned long flags, unsigned options)
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| 182 | {
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| 183 | const uint32_t *fv;
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| 184 | const char *fn;
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| 185 |
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| 186 | fv = e2attr_flags_value;
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| 187 | if (options & PFOPT_LONG) {
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| 188 | int first = 1;
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| 189 | fn = e2attr_flags_lname;
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| 190 | do {
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| 191 | if (flags & *fv) {
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| 192 | if (!first)
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| 193 | fputs(", ", f);
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| 194 | fputs(fn, f);
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| 195 | first = 0;
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| 196 | }
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| 197 | fv++;
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| 198 | fn += strlen(fn) + 1;
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| 199 | } while (*fn);
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| 200 | if (first)
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| 201 | fputs("---", f);
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| 202 | } else {
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| 203 | fn = e2attr_flags_sname;
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| 204 | do {
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| 205 | char c = '-';
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| 206 | if (flags & *fv)
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| 207 | c = *fn;
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| 208 | fputc(c, f);
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| 209 | fv++;
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| 210 | fn++;
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| 211 | } while (*fn);
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| 212 | }
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| 213 | }
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