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[] ALIGN1 =
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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[] ALIGN1 =
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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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