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dup-init.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-init.c (2836B) |
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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 <errno.h> |
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6 #include <fcntl.h> |
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7 #include <limits.h> |
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8 #include <stdint.h> |
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9 #include <stdio.h> |
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10 #include <stdlib.h> |
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11 #include <strings.h> |
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12 #include <unistd.h> |
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13 |
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14 #include <sodium.h> |
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15 |
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16 #include "arg.h" |
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17 #include "block.h" |
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18 #include "config.h" |
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19 #include "key.h" |
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20 #include "lock.h" |
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21 #include "misc.h" |
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22 #include "snap.h" |
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23 #include "state.h" |
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24 |
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25 struct param param; |
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26 int verbose; |
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27 char *argv0; |
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28 |
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29 static void |
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30 savestate(char *repo) |
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31 { |
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32 char path[PATH_MAX]; |
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33 int fd; |
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34 |
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35 if (snprintf(path, sizeof(path), "%s/state", repo) >= sizeof(path)) |
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36 errx(1, "snprintf: %s: path too long", path); |
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37 fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0600); |
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38 if (fd < 0) |
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39 err(1, "open: %s", path); |
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40 if (writestate(fd, ¶m) < 0) |
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41 printerr("writestate: %s", path); |
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42 if (close(fd) < 0) |
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43 err(1, "close: %s", path); |
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44 } |
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45 |
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46 static void |
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47 loadkey(char *keyf) |
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48 { |
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49 int fd; |
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50 |
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51 if (keyf == NULL) |
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52 return; |
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53 |
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54 fd = open(keyf, O_RDONLY); |
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55 if (fd < 0) |
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56 err(1, "open: %s", keyf); |
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57 if (readkey(fd, param.key, sizeof(param.key)) < 0) |
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58 printerr("readkey: %s", keyf); |
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59 param.keyloaded = 1; |
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60 if (close(fd) < 0) |
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61 err(1, "close: %s", keyf); |
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62 } |
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63 |
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64 static void |
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65 usage(void) |
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66 { |
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67 fprintf(stderr, "usage: %s [-v] [-E algo] [-Z algo] [-k keyfile] [repo]\n", argv0); |
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68 exit(1); |
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69 } |
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70 |
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71 int |
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72 main(int argc, char *argv[]) |
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73 { |
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74 char spath[PATH_MAX]; |
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75 char bpath[PATH_MAX]; |
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76 struct bctx *bctx; |
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77 char *keyf = NULL; |
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78 char *repo; |
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79 int lfd; |
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80 |
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81 param.calgo = "snappy"; |
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82 param.ealgo = "none"; |
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83 |
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84 ARGBEGIN { |
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85 case 'k': |
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86 keyf = EARGF(usage()); |
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87 break; |
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88 case 'E': |
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89 param.ealgo = EARGF(usage()); |
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90 break; |
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91 case 'Z': |
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92 param.calgo = EARGF(usage()); |
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93 break; |
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94 case 'v': |
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95 verbose++; |
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96 break; |
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97 default: |
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98 usage(); |
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99 } ARGEND |
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100 |
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101 switch (argc) { |
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102 case 0: |
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103 repo = "."; |
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104 break; |
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105 case 1: |
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106 repo = argv[0]; |
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107 break; |
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108 default: |
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109 usage(); |
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110 }; |
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111 |
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112 if (sodium_init() < 0) |
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113 errx(1, "sodium_init: failed"); |
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114 |
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115 if (strcasecmp(param.ealgo, "none") == 0) { |
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116 param.seed = 0; |
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117 } else if (strcasecmp(param.ealgo, "XChaCha20-Poly1305") == 0) { |
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118 if (keyf == NULL) |
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119 errx(1, "expected encryption key"); |
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120 param.seed = randombytes_uniform(0xffffffff); |
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121 } |
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122 |
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123 if (snprintf(spath, sizeof(spath), "%s/%s", |
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124 repo, ARCHIVEPATH) >= sizeof(spath)) |
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125 errx(1, "snprintf: %s: path too long", spath); |
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126 if (snprintf(bpath, sizeof(bpath), "%s/%s", |
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127 repo, STORAGEPATH) >= sizeof(bpath)) |
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128 errx(1, "snprintf: %s: path too long", bpath); |
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129 |
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130 if (mkdir(repo, 0700) < 0 && errno != EEXIST) |
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131 err(1, "mkdir: %s", repo); |
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132 |
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133 if ((lfd = lockrepo(repo)) < 0) |
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134 errx(1, "failed to lock repository"); |
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135 |
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136 if (mkdir(spath, 0700) < 0) |
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137 err(1, "mkdir: %s", spath); |
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138 |
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139 loadkey(keyf); |
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140 savestate(repo); |
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141 |
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142 if (bcreat(bpath, 0600, &bctx) < 0) |
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143 printerr("bcreat: %s", bpath); |
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144 if (bclose(bctx) < 0) |
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145 printerr("bclose: %s", bpath); |
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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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