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 1.2 2008/01/03 06:48:45 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void hammer_parsetime(u_int64_t *tidp, const char *timestr);
  40 static void usage(int exit_code);
  41
  42 int
  43 main(int ac, char **av)
  44 {
  45         u_int64_t tid;
  46         int ch;
  47         int status;
  48
  49         while ((ch = getopt(ac, av, "h")) != -1) {
  50                 switch(ch) {
  51                 case 'h':
  52                         usage(0);
  53                         /* not reached */
  54                 default:
  55                         usage(1);
  56                         /* not reached */
  57                 }
  58         }
  59         ac -= optind;
  60         av += optind;
  61         if (ac < 1) {
  62                 usage(1);
  63                 /* not reached */
  64         }
  65
  66         if (strcmp(av[0], "now") == 0) {
  67                 hammer_parsetime(&tid, "0s");
  68                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  69                 exit(0);
  70         }
  71         if (strcmp(av[0], "stamp") == 0) {
  72                 if (av[1] == NULL)
  73                         usage(1);
  74                 hammer_parsetime(&tid, av[1]);
  75                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  76                 exit(0);
  77         }
  78
  79         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
  80         if (status != uuid_s_ok) {
  81                 errx(1, "uuids file does not have the DragonFly "
  82                         "HAMMER filesystem type");
  83         }
  84         init_alist_templates();
  85
  86         /*
  87          * Additional commands
  88          */
  89
  90         usage(1);
  91         /* not reached */
  92         return(0);
  93 }
  94
  95 /*
  96  * Parse a timestamp for the mount point
  97  *
  98  * yyyymmddhhmmss
  99  * -N[s/h/d/m/y]
 100  */
 101 static
 102 void
 103 hammer_parsetime(u_int64_t *tidp, const char *timestr)
 104 {
 105         struct tm tm;
 106         time_t t;
 107         int32_t n;
 108         char c;
 109         double seconds = 0;
 110
 111         t = time(NULL);
 112
 113         if (*timestr == 0)
 114                 usage(1);
 115
 116         if (isalpha(timestr[strlen(timestr)-1])) {
 117                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
 118                         usage(1);
 119                 switch(c) {
 120                 case 'Y':
 121                         n *= 365;
 122                         goto days;
 123                 case 'M':
 124                         n *= 30;
 125                         /* fall through */
 126                 case 'D':
 127                 days:
 128                         n *= 24;
 129                         /* fall through */
 130                 case 'h':
 131                         n *= 60;
 132                         /* fall through */
 133                 case 'm':
 134                         n *= 60;
 135                         /* fall through */
 136                 case 's':
 137                         t -= n;
 138                         break;
 139                 default:
 140                         usage(1);
 141                 }
 142         } else {
 143                 localtime_r(&t, &tm);
 144                 seconds = (double)tm.tm_sec;
 145                 tm.tm_year -= 1900;
 146                 tm.tm_mon -= 1;
 147                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
 148                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
 149                            &tm.tm_hour, &tm.tm_min, &seconds);
 150                 tm.tm_mon += 1;
 151                 tm.tm_year += 1900;
 152                 tm.tm_sec = (int)seconds;
 153                 t = mktime(&tm);
 154         }
 155         localtime_r(&t, &tm);
 156         *tidp = (u_int64_t)t * 1000000000 +
 157                 (seconds - (int)seconds) * 1000000000;
 158 }
 159
 160 static
 161 void
 162 usage(int exit_code)
 163 {
 164         fprintf(stderr,
 165                 "hammer -h\n"
 166                 "hammer now\n"
 167                 "hammer stamp <time>\n"
 168         );
 169         fprintf(stderr, "    time: +n[s/m/h/D/M/Y]\n"
 170                         "    time: yyyymmdd[:hhmmss]\n");
 171         exit(exit_code);
 172 }