sbin/hammer/cmd_history.c

   1 /*
   2  * Copyright (c) 2008 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/cmd_history.c,v 1.1 2008/02/04 08:34:22 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void hammer_do_history(const char *path, off_t off, int len);
  40 static void dumpat(const char *path, off_t off, int len);
  41
  42 /*
  43  * history <file1> ... <fileN>
  44  */
  45 void
  46 hammer_cmd_history(const char *offset_str, char **av, int ac)
  47 {
  48         off_t off;
  49         int i;
  50         int len;
  51         char *rptr;
  52
  53         len = 32;
  54         if (*offset_str == '@') {
  55                 off = strtoll(offset_str + 1, &rptr, 0);
  56                 if (*rptr == ',')
  57                         len = strtol(rptr + 1, NULL, 0);
  58         } else {
  59                 off = -1;
  60         }
  61
  62         for (i = 0; i < ac; ++i)
  63                 hammer_do_history(av[i], off, len);
  64 }
  65
  66 static void
  67 hammer_do_history(const char *path, off_t off, int len)
  68 {
  69         struct hammer_ioc_history hist;
  70         const char *status;
  71         int fd;
  72         int i;
  73
  74         printf("%s\t", path);
  75         fd = open(path, O_RDONLY);
  76         if (fd < 0) {
  77                 printf("%s\n", strerror(errno));
  78                 return;
  79         }
  80         bzero(&hist, sizeof(hist));
  81         hist.beg_tid = HAMMER_MIN_TID;
  82         hist.end_tid = HAMMER_MAX_TID;
  83
  84         if (off >= 0) {
  85                 hist.flags |= HAMMER_IOC_HISTORY_ATKEY;
  86                 hist.key = off;
  87                 hist.nxt_key = off + 1;
  88         }
  89
  90
  91         if (ioctl(fd, HAMMERIOC_GETHISTORY, &hist) < 0) {
  92                 printf("%s\n", strerror(errno));
  93                 close(fd);
  94                 return;
  95         }
  96         status = ((hist.flags & HAMMER_IOC_HISTORY_UNSYNCED) ?
  97                  "dirty" : "clean");
  98         printf("%016llx %s {\n", hist.obj_id, status);
  99         for (;;) {
 100                 for (i = 0; i < hist.count; ++i) {
 101                         struct stat st;
 102                         struct tm tp;
 103                         time_t t;
 104                         char timebuf1[64];
 105                         char timebuf2[64];
 106                         char *hist_path = NULL;
 107
 108                         t = (int64_t)hist.tid_ary[i] / 1000000000LL;
 109                         localtime_r(&t, &tp);
 110                         strftime(timebuf1, sizeof(timebuf1),
 111                                  "%e-%b-%Y %H:%M:%S", &tp);
 112
 113                         asprintf(&hist_path, "%s@@0x%016llx",
 114                                  path, hist.tid_ary[i]);
 115                         if (off < 0 && stat(hist_path, &st) == 0) {
 116                                 localtime_r(&st.st_mtime, &tp);
 117                                 strftime(timebuf2, sizeof(timebuf2),
 118                                          "%e-%b-%Y %H:%M:%S %Z", &tp);
 119                         } else {
 120                                 snprintf(timebuf2, sizeof(timebuf2), "?");
 121                         }
 122                         if (off < 0) {
 123                                 printf("    %016llx %s contents-to %s",
 124                                        hist.tid_ary[i],
 125                                        timebuf1, timebuf2);
 126                         } else {
 127                                 printf("    %016llx %s",
 128                                        hist.tid_ary[i],
 129                                        timebuf1);
 130                                 if (VerboseOpt) {
 131                                         printf(" '");
 132                                         dumpat(hist_path, off, len);
 133                                         printf("'");
 134                                 }
 135                         }
 136                         printf("\n");
 137                         free(hist_path);
 138                 }
 139                 if (hist.flags & HAMMER_IOC_HISTORY_EOF)
 140                         break;
 141                 if (hist.flags & HAMMER_IOC_HISTORY_NEXT_KEY)
 142                         break;
 143                 if ((hist.flags & HAMMER_IOC_HISTORY_NEXT_TID) == 0)
 144                         break;
 145                 hist.beg_tid = hist.nxt_tid;
 146                 if (ioctl(fd, HAMMERIOC_GETHISTORY, &hist) < 0) {
 147                         printf("    error: %s\n", strerror(errno));
 148                         break;
 149                 }
 150         }
 151         printf("}\n");
 152         close(fd);
 153 }
 154
 155 static void
 156 dumpat(const char *path, off_t off, int len)
 157 {
 158         char buf[1024];
 159         int fd;
 160         int n;
 161         int r;
 162
 163         fd = open(path, O_RDONLY);
 164         if (fd < 0)
 165                 return;
 166         lseek(fd, off, 0);
 167         while (len) {
 168                 n = (len > (int)sizeof(buf)) ? (int)sizeof(buf) : len;
 169                 r = read(fd, buf, n);
 170                 if (r <= 0)
 171                         break;
 172                 len -= r;
 173                 for (n = 0; n < r; ++n) {
 174                         if (isprint(buf[n]))
 175                                 putc(buf[n], stdout);
 176                         else
 177                                 putc('.', stdout);
 178                 }
 179         }
 180 }
 181