dup-gc.c - dedup - deduplicating backup program
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dup-gc.c (2047B)
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1 #include <sys/types.h>
2 #include <sys/stat.h>
3
4 #include <err.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <stdint.h>
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <unistd.h>
11
12 #include "arg.h"
13 #include "block.h"
14 #include "config.h"
15 #include "key.h"
16 #include "lock.h"
17 #include "misc.h"
18 #include "snap.h"
19 #include "state.h"
20
21 struct param param;
22 int verbose;
23 char *argv0;
24
25 static void
26 loadstate(char *repo)
27 {
28 char path[PATH_MAX];
29 int fd;
30
31 if (snprintf(path, sizeof(path), "%s/state", repo) >= sizeof(path))
32 errx(1, "snprintf: %s: path too long", path);
33 fd = open(path, O_RDONLY);
34 if (fd < 0)
35 err(1, "open: %s", path);
36 if (readstate(fd, ¶m) < 0)
37 printerr("readstate: %s", path);
38 if (close(fd) < 0)
39 err(1, "close: %s", path);
40 }
41
42 static void
43 loadkey(char *keyfile)
44 {
45 int fd;
46
47 if (keyfile == NULL)
48 return;
49
50 fd = open(keyfile, O_RDONLY);
51 if (fd < 0)
52 err(1, "open: %s", keyfile);
53 if (readkey(fd, param.key, sizeof(param.key)) < 0)
54 printerr("readkey: %s", keyfile);
55 param.keyloaded = 1;
56 if (close(fd) < 0)
57 err(1, "close: %s", keyfile);
58 }
59
60 static void
61 usage(void)
62 {
63 fprintf(stderr, "usage: %s [-v] [-k keyfile] [repo]\n", argv0);
64 exit(1);
65 }
66
67 int
68 main(int argc, char *argv[])
69 {
70 char path[PATH_MAX];
71 struct bctx *bctx;
72 char *keyfile = NULL;
73 char *repo;
74 int lfd;
75
76 ARGBEGIN {
77 case 'k':
78 keyfile = EARGF(usage());
79 break;
80 case 'v':
81 verbose++;
82 break;
83 default:
84 usage();
85 } ARGEND
86
87 switch (argc) {
88 case 0:
89 repo = ".";
90 break;
91 case 1:
92 repo = argv[0];
93 break;
94 default:
95 usage();
96 };
97
98 if (snprintf(path, sizeof(path), "%s/%s",
99 repo, STORAGEPATH) >= sizeof(path))
100 errx(1, "snprintf: %s: path too long", path);
101
102 if ((lfd = lockrepo(repo)) < 0)
103 errx(1, "failed to lock repository");
104
105 loadkey(keyfile);
106 loadstate(repo);
107
108 if (bopen(path, B_RDWR, 0600, &bctx) < 0)
109 printerr("bopen: %s", path);
110 if (bgc(bctx) < 0)
111 printerr("bgc: %s", path);
112 if (bclose(bctx) < 0)
113 printerr("bclose: %s", path);
114
115 if (unlockrepo(lfd) < 0)
116 errx(1, "failed to unlock repository");
117 return 0;
118 }