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