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dup-pack.c - dedup - deduplicating backup program |
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git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/ (git://bitreich.org) |
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README |
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LICENSE |
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--- |
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dup-pack.c (2805B) |
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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 |
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4 #include <err.h> |
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5 #include <fcntl.h> |
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6 #include <limits.h> |
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7 #include <stdint.h> |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 #include <unistd.h> |
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11 |
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12 #include "arg.h" |
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13 #include "block.h" |
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14 #include "chunker.h" |
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15 #include "config.h" |
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16 #include "key.h" |
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17 #include "lock.h" |
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18 #include "misc.h" |
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19 #include "snap.h" |
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20 #include "state.h" |
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21 |
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22 struct param param; |
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23 int verbose; |
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24 char *argv0; |
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25 |
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26 static void |
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27 loadstate(char *repo) |
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28 { |
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29 char path[PATH_MAX]; |
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30 int fd; |
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31 |
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32 if (snprintf(path, sizeof(path), "%s/state", repo) >= sizeof(path)) |
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33 errx(1, "snprintf: %s: path too long", path); |
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34 fd = open(path, O_RDONLY); |
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35 if (fd < 0) |
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36 err(1, "open: %s", path); |
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37 if (readstate(fd, ¶m) < 0) |
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38 printerr("readstate: %s", path); |
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39 if (close(fd) < 0) |
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40 err(1, "close: %s", path); |
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41 } |
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42 |
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43 static void |
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44 loadkey(char *keyfile) |
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45 { |
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46 int fd; |
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47 |
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48 if (keyfile == NULL) |
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49 return; |
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50 |
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51 fd = open(keyfile, O_RDONLY); |
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52 if (fd < 0) |
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53 err(1, "open: %s", keyfile); |
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54 if (readkey(fd, param.key, sizeof(param.key)) < 0) |
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55 printerr("readkey: %s", keyfile); |
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56 param.keyloaded = 1; |
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57 if (close(fd) < 0) |
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58 err(1, "close: %s", keyfile); |
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59 } |
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60 |
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61 static void |
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62 pack(struct sctx *sctx, struct bctx *bctx) |
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63 { |
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64 struct chunker *c; |
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65 |
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66 if ((c = copen(0, BSIZEMIN, BSIZEMAX, HMASKBITS, WINSIZE, |
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67 param.seed)) == NULL) |
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68 printerr("copen"); |
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69 |
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70 while (cfill(c) > 0) { |
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71 unsigned char md[MDSIZE]; |
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72 void *buf; |
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73 size_t n; |
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74 |
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75 buf = cget(c, &n); |
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76 if (buf == NULL) |
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77 printerr("cget"); |
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78 if (bput(bctx, buf, n, md) < 0) |
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79 printerr("bput"); |
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80 if (sput(sctx, md) < 0) |
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81 printerr("sput"); |
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82 cdrain(c); |
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83 } |
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84 cclose(c); |
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85 } |
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86 |
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87 static void |
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88 usage(void) |
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89 { |
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90 fprintf(stderr, "usage: %s [-v] [-k keyfile] [-r repo] name\n", argv0); |
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91 exit(1); |
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92 } |
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93 |
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94 int |
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95 main(int argc, char *argv[]) |
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96 { |
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97 char spath[PATH_MAX]; |
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98 char bpath[PATH_MAX]; |
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99 struct sctx *sctx; |
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100 struct bctx *bctx; |
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101 char *keyfile = NULL; |
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102 char *repo = "."; |
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103 int lfd; |
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104 |
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105 ARGBEGIN { |
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106 case 'k': |
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107 keyfile = EARGF(usage()); |
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108 break; |
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109 case 'r': |
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110 repo = EARGF(usage()); |
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111 break; |
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112 case 'v': |
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113 verbose++; |
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114 break; |
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115 default: |
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116 usage(); |
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117 } ARGEND |
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118 |
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119 if (argc != 1) |
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120 usage(); |
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121 |
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122 if (snprintf(spath, sizeof(spath), "%s/archive/%s", |
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123 repo, argv[0]) >= sizeof(spath)) |
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124 errx(1, "snprintf: %s: path too long", spath); |
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125 if (snprintf(bpath, sizeof(bpath), "%s/storage", |
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126 repo) >= sizeof(bpath)) |
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127 errx(1, "snprintf: %s: path too long", bpath); |
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128 |
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129 if ((lfd = lockrepo(repo)) < 0) |
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130 errx(1, "failed to lock repository"); |
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131 |
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132 loadkey(keyfile); |
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133 loadstate(repo); |
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134 |
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135 if (screat(spath, 0600, &sctx) < 0) |
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136 printerr("screat: %s", spath); |
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137 if (bopen(bpath, B_RDWR, 0600, &bctx) < 0) |
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138 printerr("bopen: %s", bpath); |
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139 |
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140 pack(sctx, bctx); |
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141 |
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142 if (bclose(bctx) < 0) |
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143 printerr("bclose: %s", bpath); |
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144 if (sclose(sctx) < 0) |
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145 printerr("sclose: %s", spath); |
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146 |
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147 if (unlockrepo(lfd) < 0) |
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148 errx(1, "failed to unlock repository"); |
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149 return 0; |
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150 } |
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