Merge from vendor branch FILE:
[dragonfly.git] / sbin / hammer / hammer.c
1 /*
2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
3  * 
4  * This code is derived from software contributed to The DragonFly Project
5  * by Matthew Dillon <dillon@backplane.com>
6  * 
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in
15  *    the documentation and/or other materials provided with the
16  *    distribution.
17  * 3. Neither the name of The DragonFly Project nor the names of its
18  *    contributors may be used to endorse or promote products derived
19  *    from this software without specific, prior written permission.
20  * 
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  * 
34  * $DragonFly: src/sbin/hammer/hammer.c,v 1.4 2008/01/18 19:38:29 dillon Exp $
35  */
36
37 #include "hammer.h"
38
39 static void hammer_parsetime(u_int64_t *tidp, const char *timestr);
40 static void hammer_parsedevs(const char *blkdevs);
41 static void usage(int exit_code);
42
43 int RecurseOpt;
44
45 int
46 main(int ac, char **av)
47 {
48         u_int64_t tid;
49         int ch;
50         int status;
51         char *blkdevs = NULL;
52
53         while ((ch = getopt(ac, av, "hf:r")) != -1) {
54                 switch(ch) {
55                 case 'h':
56                         usage(0);
57                         /* not reached */
58                 case 'r':
59                         RecurseOpt = 1;
60                         break;
61                 case 'f':
62                         blkdevs = optarg;
63                         break;
64                 default:
65                         usage(1);
66                         /* not reached */
67                 }
68         }
69         ac -= optind;
70         av += optind;
71         if (ac < 1) {
72                 usage(1);
73                 /* not reached */
74         }
75
76         if (strcmp(av[0], "now") == 0) {
77                 hammer_parsetime(&tid, "0s");
78                 printf("0x%08x\n", (int)(tid / 1000000000LL));
79                 exit(0);
80         }
81         if (strcmp(av[0], "stamp") == 0) {
82                 if (av[1] == NULL)
83                         usage(1);
84                 hammer_parsetime(&tid, av[1]);
85                 printf("0x%08x\n", (int)(tid / 1000000000LL));
86                 exit(0);
87         }
88
89         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
90         if (status != uuid_s_ok) {
91                 errx(1, "uuids file does not have the DragonFly "
92                         "HAMMER filesystem type");
93         }
94
95         init_alist_templates();
96         if (strcmp(av[0], "show") == 0) {
97                 int32_t vol_no = -1;
98                 int32_t clu_no = -1;
99
100                 hammer_parsedevs(blkdevs);
101                 if (ac > 1)
102                         sscanf(av[1], "%d:%d", &vol_no, &clu_no);
103                 hammer_cmd_show(vol_no, clu_no, 0);
104                 exit(0);
105         }
106         usage(1);
107         /* not reached */
108         return(0);
109 }
110
111 /*
112  * Parse a timestamp for the mount point
113  *
114  * yyyymmddhhmmss
115  * -N[s/h/d/m/y]
116  */
117 static
118 void
119 hammer_parsetime(u_int64_t *tidp, const char *timestr)
120 {
121         struct tm tm;
122         time_t t;
123         int32_t n;
124         char c;
125         double seconds = 0;
126
127         t = time(NULL);
128
129         if (*timestr == 0)
130                 usage(1);
131
132         if (isalpha(timestr[strlen(timestr)-1])) {
133                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
134                         usage(1);
135                 switch(c) {
136                 case 'Y':
137                         n *= 365;
138                         goto days;
139                 case 'M':
140                         n *= 30;
141                         /* fall through */
142                 case 'D':
143                 days:
144                         n *= 24;
145                         /* fall through */
146                 case 'h':
147                         n *= 60;
148                         /* fall through */
149                 case 'm':
150                         n *= 60;
151                         /* fall through */
152                 case 's':
153                         t -= n;
154                         break;
155                 default:
156                         usage(1);
157                 }
158         } else {
159                 localtime_r(&t, &tm);
160                 seconds = (double)tm.tm_sec;
161                 tm.tm_year += 1900;
162                 tm.tm_mon += 1;
163                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
164                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
165                            &tm.tm_hour, &tm.tm_min, &seconds);
166                 tm.tm_mon -= 1;
167                 tm.tm_year -= 1900;
168                 /* if [:hhmmss] is omitted, assume :000000.0 */
169                 if (n < 4)
170                         tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
171                 else
172                         tm.tm_sec = (int)seconds;
173                 t = mktime(&tm);
174         }
175         *tidp = (u_int64_t)t * 1000000000 + 
176                 (seconds - (int)seconds) * 1000000000;
177 }
178
179 static
180 void
181 hammer_parsedevs(const char *blkdevs)
182 {
183         char *copy;
184         char *volname;
185
186         if (blkdevs == NULL) {
187                 errx(1, "A -f blkdevs specification is required "
188                         "for this command");
189         }
190
191         copy = strdup(blkdevs);
192         while ((volname = copy) != NULL) {
193                 if ((copy = strchr(copy, ':')) != NULL)
194                         *copy++ = 0;
195                 setup_volume(-1, volname, 0, O_RDONLY);
196         }
197 }
198
199 static
200 void
201 usage(int exit_code)
202 {
203         fprintf(stderr, 
204                 "hammer -h\n"
205                 "hammer now\n"
206                 "hammer stamp <time>\n"
207                 "hammer -f blkdevs [-r] show [vol_no[:clu_no]]\n"
208         );
209         fprintf(stderr, "    time: +n[s/m/h/D/M/Y]\n"
210                         "    time: yyyymmdd[:hhmmss]\n");
211         exit(exit_code);
212 }
213