File: main.c

package info (click to toggle)
parchive 1.1-4.1
  • links: PTS
  • area: main
  • in suites: bullseye, buster, sid, stretch
  • size: 260 kB
  • ctags: 341
  • sloc: ansic: 3,895; makefile: 55
file content (274 lines) | stat: -rw-r--r-- 5,688 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
/*\
|*|  Parity Archive - A way to restore missing files in a set.
|*|
|*|  Copyright (C) 2001  Willem Monsuwe (willem@stack.nl)
|*|
|*|  File format by Stefan Wehlus -
|*|   initial idea by Tobias Rieper, further suggestions by Kilroy Balore 
|*|
|*|  In short: Files are XORed with each other and the result is stored.
|*|            From this, one missing file can be recreated.
\*/

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "fileops.h"
#include "rwpar.h"
#include "backend.h"
#include "checkpar.h"
#include "makepar.h"
#include "interface.h"

struct cmdline cmd;

/*\
|*| Print usage
\*/
int
usage(void)
{
	printf(
"Usage:\n"
"   parchive c(heck)   [options] <par file>         : Check parity archive\n"
"   parchive r(ecover) [options] <par file>         : Restore missing volumes\n"
"   parchive a(dd)     [options] <par file> [files] : Add files to parity archive\n"
" Advanced:\n"
"   parchive m(ix)     [options] : Try to restore from all parity files at once\n"
"   parchive i(nteractive) [<par files>] : Interactive mode (very bare-bones)\n"
"\n"
"Options: (Can be turned off with '+')\n"
"    -m   : Move existing files out of the way\n"
"    -f   : Fix faulty filenames\n"
"    -p<n>: Number of files per parity volume\n"
" or -n<n>: Number of parity volumes to create\n"
"    -d   : Search for duplicate files\n"
"    -k   : Keep broken files\n"
"    -s   : Be smart if filenames are consistently different.\n"
"    +i   : Do not add following files to parity volumes\n"
"    +c   : Do not create parity volumes\n"
"    +C   : Ignore case in filename comparisons\n"
"    +H   : Do not check control hashes\n"
"    -v,+v: Increase or decrease verbosity\n"
"    -h,-?: Display this help\n"
"    --   : Always treat following arguments as files\n"
"\n"
	);
	return 0;
}

/*\ Sanity check \*/
static int
check_sizes(void)
{
	int fail = 0;
	if (sizeof(u8) != 1) {
		fprintf(stderr, "u8 isn't 8 bits wide.\n");
		fail++;
	}
	if (sizeof(u16) != 2) {
		fprintf(stderr, "u16 isn't 16 bits wide.\n");
		fail++;
	}
	if (sizeof(u32) != 4) {
		fprintf(stderr, "u32 isn't 32 bits wide.\n");
		fail++;
	}
	if (sizeof(i64) != 8) {
		fprintf(stderr, "u64 isn't 64 bits wide.\n");
		fail++;
	}
	return fail;
}

/*\ In ui_text.h \*/
void ui_text(void);

/*\
|*| Main loop.  Simple stuff.
\*/
int
main(int argc, char *argv[])
{
	par_t *par = 0;
	int fail = 0;
	char *p;

	if (check_sizes())
		return -1;

	/*\ Some defaults \*/
	memset(&cmd, 0, sizeof(cmd));
	cmd.volumes = 10;
	cmd.pervol = 1;
	cmd.pxx = 1;
	cmd.ctrl = 1;
	cmd.add = 1;
	cmd.usecase = 1;

	if (argc == 1) return usage();

	for (; argc > 1; argc--, argv++) {
		if (((argv[1][0] == '-') || (argv[1][0] == '+')) &&
		    argv[1][1] && !cmd.dash) {
			for (p = argv[1]; *p; p++) switch (*p) {
			case '-':
				if (p[1] == '-')
					cmd.dash = 1;
				else
					cmd.plus = 1;
				break;
			case '+':
				cmd.plus = 0;
				break;
			case 'm':
				cmd.move = cmd.plus;
				break;
			case 'i':
				cmd.add = cmd.plus;
				break;
			case 'f':
				cmd.fix = cmd.plus;
				break;
			case 'c':
				cmd.pxx = cmd.plus;
				break;
			case 'd':
				cmd.dupl = cmd.plus;
				break;
			case 'v':
				if (cmd.plus)
					cmd.loglevel++;
				else
					cmd.loglevel--;
				break;
			case 'p':
			case 'n':
				cmd.pervol = (*p == 'p');
				while (isspace(*++p))
					;
				if (!*p) {
					argv++;
					argc--;
					p = argv[1];
				}
				if (!isdigit(*p)) {
					fprintf(stderr, "Value expected!\n");
				} else {
					cmd.volumes = 0;
					do {
						cmd.volumes *= 10;
						cmd.volumes += *p - '0';
					} while (isdigit(*++p));
					p--;
				}
				break;
			case 'H':
				cmd.ctrl = cmd.plus;
				break;
			case 'C':
				cmd.usecase = cmd.plus;
				break;
			case 'k':
				cmd.keep = cmd.plus;
				break;
			case 's':
				cmd.smart = cmd.plus;
				break;
			case '?':
			case 'h':
				return usage();
			default:
				fprintf(stderr,
					"Unknown switch: '%c'\n", *p);
				break;
			}
			continue;
		}
		if (!cmd.action) {
			switch (argv[1][0]) {
			case 'c':
			case 'C':
				cmd.action = ACTION_CHECK;
				break;
			case 'm':
			case 'M':
				cmd.action = ACTION_MIX;
				break;
			case 'r':
			case 'R':
				cmd.action = ACTION_RESTORE;
				break;
			case 'a':
			case 'A':
				cmd.action = ACTION_ADD;
				break;
			case 'i':
			case 'I':
				cmd.action = ACTION_TEXT_UI;
				break;
			default:
				fprintf(stderr, "Unknown command: '%s'\n",
						argv[1]);
				break;
			}
			continue;
		}
		switch (cmd.action) {
		default:
			cmd.action = ACTION_CHECK;
			/*\ FALLTHROUGH \*/
		case ACTION_CHECK:
		case ACTION_RESTORE:
			fprintf(stderr, "Checking %s\n", argv[1]);
			par = read_par_header(unist(argv[1]), 0, 0, 0);
			if (!par) {
				fail = 2;
				continue;
			}
			if (check_par(par) < 0) fail = 1;
			free_par(par);
			par = 0;
			break;
		case ACTION_ADD:
			fprintf(stderr, "Adding to %s\n", argv[1]);
			par = read_par_header(unist(argv[1]), 1, 0, 0);
			if (!par) return 2;
			cmd.action = ACTION_ADDING;
			break;
		case ACTION_ADDING:
			par_add_file(par, find_file_name(unist(argv[1]), 1));
			break;
		case ACTION_MIX:
			fprintf(stderr, "Unknown argument: '%s'\n", argv[1]);
			break;
		case ACTION_TEXT_UI:
			par_load(unist(argv[1]));
			break;
		}
	}
	if (cmd.action == ACTION_TEXT_UI) {
		ui_text();
		return 0;
	}
	if (cmd.action == ACTION_MIX) {
		par = find_all_par_files();
		if (par) {
			fprintf(stderr, "\nChecking:\n");
			if (check_par(par) < 0)
				fail = 1;
			free_par(par);
			par = 0;
		} else {
			fail = 2;
		}
	}
	if (par) {
		if (cmd.pxx && !par_make_pxx(par))
			fail |= 1;
		if (!par->vol_number && !write_par_header(par))
			fail |= 1;
		free_par(par);
	}
	return fail;
}