dup-rm.c - dedup - deduplicating backup program
(HTM) git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) Tags
(DIR) README
(DIR) LICENSE
---
dup-rm.c (2590B)
---
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 rm(struct sctx *sctx, struct bctx *bctx)
62 {
63 unsigned char md[MDSIZE];
64 int n;
65
66 while ((n = sget(sctx, md)) == MDSIZE) {
67 if (brm(bctx, md) < 0)
68 printerr("brm");
69 }
70 if (n < 0)
71 printerr("sget");
72 }
73
74 static void
75 usage(void)
76 {
77 fprintf(stderr, "usage: %s [-v] [-k keyfile] [-r repo] name\n", argv0);
78 exit(1);
79 }
80
81 int
82 main(int argc, char *argv[])
83 {
84 char spath[PATH_MAX];
85 char bpath[PATH_MAX];
86 struct sctx *sctx;
87 struct bctx *bctx;
88 char *keyfile = NULL;
89 char *repo = ".";
90 int lfd;
91
92 ARGBEGIN {
93 case 'k':
94 keyfile = EARGF(usage());
95 break;
96 case 'r':
97 repo = EARGF(usage());
98 break;
99 case 'v':
100 verbose++;
101 break;
102 default:
103 usage();
104 } ARGEND
105
106 if (argc != 1)
107 usage();
108
109 if (snprintf(spath, sizeof(spath), "%s/archive/%s",
110 repo, argv[0]) >= sizeof(spath))
111 errx(1, "snprintf: %s: path too long", spath);
112 if (snprintf(bpath, sizeof(bpath), "%s/storage",
113 repo) >= sizeof(bpath))
114 errx(1, "snprintf: %s: path too long", bpath);
115
116 if ((lfd = lockrepo(repo)) < 0)
117 errx(1, "failed to lock repository");
118
119 loadkey(keyfile);
120 loadstate(repo);
121
122 if (sopen(spath, S_READ, 0600, &sctx) < 0)
123 printerr("sopen: %s", spath);
124 if (bopen(bpath, B_RDWR, 0600, &bctx) < 0)
125 printerr("bopen: %s", bpath);
126
127 rm(sctx, bctx);
128
129 if (bclose(bctx) < 0)
130 printerr("bclose: %s", bpath);
131 if (sclose(sctx) < 0)
132 printerr("sclose: %s", spath);
133 if (unlink(spath) < 0)
134 err(1, "unlink: %s", spath);
135
136 if (unlockrepo(lfd) < 0)
137 errx(1, "failed to unlock repository");
138
139 return 0;
140 }