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dup-unpack.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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LICENSE |
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--- |
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dup-unpack.c (2723B) |
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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 "config.h" |
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15 #include "key.h" |
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16 #include "lock.h" |
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17 #include "misc.h" |
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18 #include "snap.h" |
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19 #include "state.h" |
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20 |
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21 struct param param; |
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22 int verbose; |
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23 char *argv0; |
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24 |
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25 static void |
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26 loadstate(char *repo) |
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27 { |
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28 char path[PATH_MAX]; |
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29 int fd; |
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30 |
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31 if (snprintf(path, sizeof(path), "%s/state", repo) >= sizeof(path)) |
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32 errx(1, "snprintf: %s: path too long", path); |
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33 fd = open(path, O_RDONLY); |
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34 if (fd < 0) |
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35 err(1, "open: %s", path); |
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36 if (readstate(fd, ¶m) < 0) |
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37 printerr("readstate: %s", path); |
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38 if (close(fd) < 0) |
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39 err(1, "close: %s", path); |
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40 } |
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41 |
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42 static void |
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43 loadkey(char *keyfile) |
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44 { |
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45 int fd; |
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46 |
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47 if (keyfile == NULL) |
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48 return; |
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49 |
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50 fd = open(keyfile, O_RDONLY); |
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51 if (fd < 0) |
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52 err(1, "open: %s", keyfile); |
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53 if (readkey(fd, param.key, sizeof(param.key)) < 0) |
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54 printerr("readkey: %s", keyfile); |
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55 param.keyloaded = 1; |
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56 if (close(fd) < 0) |
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57 err(1, "close: %s", keyfile); |
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58 } |
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59 |
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60 static void |
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61 unpack(struct sctx *sctx, struct bctx *bctx) |
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62 { |
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63 unsigned char md[MDSIZE]; |
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64 void *buf; |
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65 int sn; |
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66 |
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67 buf = malloc(BSIZEMAX); |
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68 if (buf == NULL) |
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69 err(1, "malloc"); |
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70 while ((sn = sget(sctx, md)) == MDSIZE) { |
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71 size_t bn = BSIZEMAX; |
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72 |
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73 if (bget(bctx, md, buf, &bn) < 0) |
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74 printerr("bget"); |
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75 if (xwrite(1, buf, bn) != bn) |
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76 err(1, "xwrite"); |
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77 } |
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78 if (sn < 0) |
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79 printerr("sget"); |
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80 free(buf); |
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81 } |
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82 |
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83 static void |
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84 usage(void) |
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85 { |
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86 fprintf(stderr, "usage: %s [-v] [-k keyfile] [-r repo] name\n", argv0); |
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87 exit(1); |
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88 } |
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89 |
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90 int |
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91 main(int argc, char *argv[]) |
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92 { |
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93 char spath[PATH_MAX]; |
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94 char bpath[PATH_MAX]; |
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95 struct sctx *sctx; |
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96 struct bctx *bctx; |
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97 char *keyfile = NULL; |
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98 char *repo = "."; |
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99 int lfd; |
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100 |
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101 ARGBEGIN { |
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102 case 'k': |
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103 keyfile = EARGF(usage()); |
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104 break; |
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105 case 'r': |
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106 repo = EARGF(usage()); |
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107 break; |
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108 case 'v': |
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109 verbose++; |
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110 break; |
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111 default: |
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112 usage(); |
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113 } ARGEND |
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114 |
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115 if (argc != 1) |
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116 usage(); |
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117 |
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118 if (snprintf(spath, sizeof(spath), "%s/archive/%s", |
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119 repo, argv[0]) >= sizeof(spath)) |
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120 errx(1, "snprintf: %s: path too long", spath); |
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121 if (snprintf(bpath, sizeof(bpath), "%s/storage", |
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122 repo) >= sizeof(bpath)) |
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123 errx(1, "snprintf: %s: path too long", bpath); |
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124 |
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125 if ((lfd = lockrepo(repo)) < 0) |
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126 errx(1, "failed to lock repository"); |
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127 |
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128 loadkey(keyfile); |
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129 loadstate(repo); |
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130 |
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131 if (sopen(spath, S_READ, 0600, &sctx) < 0) |
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132 printerr("sopen: %s", spath); |
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133 if (bopen(bpath, B_READ, 0600, &bctx) < 0) |
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134 printerr("bopen: %s", bpath); |
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135 |
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136 unpack(sctx, bctx); |
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137 |
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138 if (bclose(bctx) < 0) |
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139 printerr("bclose: %s", bpath); |
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140 if (sclose(sctx) < 0) |
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141 printerr("sclose: %s", spath); |
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142 |
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143 if (unlockrepo(lfd) < 0) |
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144 errx(1, "failed to unlock repository"); |
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145 |
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146 return 0; |
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147 } |
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