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tdup-info.c - dedup - data deduplication program |
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git clone git://bitreich.org/dedup/ git://hg6vgqziawt5s4dj.onion/dedup/ (git://bitreich.org) |
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README |
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LICENSE |
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--- |
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tdup-info.c (2945B) |
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--- |
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1 #include <sys/types.h> |
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2 #include <sys/stat.h> |
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3 #include <sys/file.h> |
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4 |
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5 #include <err.h> |
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6 #include <fcntl.h> |
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7 #include <stdio.h> |
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8 #include <stdint.h> |
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9 #include <stdlib.h> |
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10 #include <string.h> |
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11 #include <unistd.h> |
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12 |
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13 #include "arg.h" |
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14 #include "blake2.h" |
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15 #include "dedup.h" |
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16 |
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17 static struct snap_hdr snap_hdr; |
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18 static struct blk_hdr blk_hdr; |
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19 static int ifd; |
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20 static int sfd; |
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21 static int hash_algo = HASH_BLAKE2B; |
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22 static int compr_algo = COMPR_LZ4; |
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23 |
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24 int verbose; |
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25 char *argv0; |
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26 |
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27 static void |
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28 print_info(int tflag) |
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29 { |
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30 struct stats *st = &snap_hdr.st; |
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31 |
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32 if (verbose > 0) { |
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33 fprintf(stderr, "Compression algorithm: %s\n", |
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34 compr_type2name(compr_algo)); |
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35 fprintf(stderr, "Hash algorithm: %s\n", |
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36 hash_type2name(hash_algo)); |
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37 } |
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38 |
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39 if (st->nr_blks == 0) |
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40 return; |
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41 |
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42 if (!tflag) { |
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43 fprintf(stderr, "Original size: %llu bytes\n", |
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44 (unsigned long long)st->orig_size); |
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45 fprintf(stderr, "Compressed size: %llu bytes\n", |
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46 (unsigned long long)st->compr_size); |
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47 fprintf(stderr, "Deduplicated size: %llu bytes\n", |
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48 (unsigned long long)st->dedup_size); |
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49 fprintf(stderr, "Deduplication ratio: %.2f\n", |
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50 (double)st->orig_size / st->dedup_size); |
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51 fprintf(stderr, "Min/avg/max block size: %llu/%llu/%llu bytes\n", |
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52 (unsigned long long)st->min_blk_size, |
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53 (unsigned long long)st->dedup_size / st->nr_blks, |
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54 (unsigned long long)st->max_blk_size); |
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55 fprintf(stderr, "Number of unique blocks: %llu\n", |
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56 (unsigned long long)st->nr_blks); |
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57 } else { |
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58 /* terse mode */ |
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59 fprintf(stderr, "%llu %llu %llu %.2f %llu %llu %llu %llu\n", |
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60 (unsigned long long)st->orig_size, |
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61 (unsigned long long)st->compr_size, |
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62 (unsigned long long)st->dedup_size, |
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63 (double)st->orig_size / st->dedup_size, |
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64 (unsigned long long)st->min_blk_size, |
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65 (unsigned long long)st->dedup_size / st->nr_blks, |
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66 (unsigned long long)st->max_blk_size, |
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67 (unsigned long long)st->nr_blks); |
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68 } |
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69 } |
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70 |
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71 static void |
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72 init(void) |
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73 { |
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74 ifd = open(SNAPSF, O_RDONLY, 0600); |
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75 if (ifd < 0) |
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76 err(1, "open %s", SNAPSF); |
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77 |
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78 sfd = open(STOREF, O_RDONLY, 0600); |
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79 if (sfd < 0) |
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80 err(1, "open %s", STOREF); |
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81 |
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82 if (flock(ifd, LOCK_NB | LOCK_EX) < 0 || |
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83 flock(sfd, LOCK_NB | LOCK_EX) < 0) |
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84 err(1, "flock"); |
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85 |
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86 xlseek(ifd, 0, SEEK_SET); |
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87 load_snap_hdr(ifd, &snap_hdr); |
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88 xlseek(sfd, 0, SEEK_SET); |
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89 load_blk_hdr(sfd, &blk_hdr, &compr_algo, &hash_algo); |
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90 } |
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91 |
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92 static void |
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93 term(void) |
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94 { |
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95 close(ifd); |
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96 close(sfd); |
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97 } |
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98 |
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99 static void |
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100 usage(void) |
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101 { |
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102 fprintf(stderr, "usage: %s [-tv] [repo]\n", argv0); |
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103 exit(1); |
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104 } |
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105 |
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106 int |
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107 main(int argc, char *argv[]) |
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108 { |
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109 char *repo = NULL; |
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110 int tflag = 0; |
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111 |
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112 ARGBEGIN { |
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113 case 't': |
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114 tflag = 1; |
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115 break; |
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116 case 'v': |
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117 verbose++; |
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118 break; |
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119 default: |
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120 usage(); |
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121 } ARGEND |
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122 |
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123 switch (argc) { |
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124 case 0: |
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125 repo = "."; |
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126 break; |
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127 case 1: |
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128 repo = argv[0]; |
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129 break; |
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130 default: |
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131 usage(); |
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132 }; |
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133 |
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134 if (chdir(repo) < 0) |
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135 err(1, "chdir: %s", repo); |
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136 |
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137 init(); |
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138 print_info(tflag); |
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139 term(); |
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140 return 0; |
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141 } |
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