usr.bin/systat/devs.c

   1 /*
   2  * Copyright (c) 1998 Kenneth D. Merry.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/usr.bin/systat/devs.c,v 1.4 1999/08/28 01:05:59 peter Exp $
  29  * $DragonFly: src/usr.bin/systat/devs.c,v 1.8 2008/11/10 04:59:45 swildner Exp $
  30  */
  31 /*
  32  * Some code and ideas taken from the old disks.c.
  33  * static char sccsid[] = "@(#)disks.c  8.1 (Berkeley) 6/6/93";
  34  */
  35 /*-
  36  * Copyright (c) 1980, 1992, 1993
  37  *      The Regents of the University of California.  All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  */
  63
  64 #include <sys/types.h>
  65 #include <sys/devicestat.h>
  66
  67 #include <string.h>
  68 #include <devstat.h>
  69 #include <stdlib.h>
  70 #include <ctype.h>
  71 #include <err.h>
  72 #include "systat.h"
  73 #include "extern.h"
  74 #include "devs.h"
  75
  76 typedef enum {
  77         DS_MATCHTYPE_NONE,
  78         DS_MATCHTYPE_SPEC,
  79         DS_MATCHTYPE_PATTERN
  80 } last_match_type;
  81
  82 last_match_type last_type;
  83 struct device_selection *dev_select;
  84 long generation;
  85 int num_devices, num_selected;
  86 int num_selections;
  87 long select_generation;
  88 struct devstat_match *matches = NULL;
  89 int num_matches = 0;
  90 char **specified_devices;
  91 int num_devices_specified = 0;
  92
  93 static int dsmatchselect(char *args, devstat_select_mode select_mode,
  94                          int maxshowdevs, struct statinfo *s1);
  95 static int dsselect(char *args, devstat_select_mode select_mode,
  96                     int maxshowdevs, struct statinfo *s1);
  97
  98 int
  99 dsinit(int maxshowdevs, struct statinfo *s1, struct statinfo *s2 __unused,
 100        struct statinfo *s3 __unused)
 101 {
 102
 103         /*
 104          * Make sure that the userland devstat version matches the kernel
 105          * devstat version.  If not, exit and print a message informing
 106          * the user of his mistake.
 107          */
 108         if (checkversion() < 0)
 109                 errx(1, "%s", devstat_errbuf);
 110
 111         generation = 0;
 112         num_devices = 0;
 113         num_selected = 0;
 114         num_selections = 0;
 115         select_generation = 0;
 116         last_type = DS_MATCHTYPE_NONE;
 117
 118         if (getdevs(s1) == -1)
 119                 errx(1, "%s", devstat_errbuf);
 120
 121         num_devices = s1->dinfo->numdevs;
 122         generation = s1->dinfo->generation;
 123
 124         dev_select = NULL;
 125
 126         /*
 127          * At this point, selectdevs will almost surely indicate that the
 128          * device list has changed, so we don't look for return values of 0
 129          * or 1.  If we get back -1, though, there is an error.
 130          */
 131         if (selectdevs(&dev_select, &num_selected, &num_selections,
 132                        &select_generation, generation, s1->dinfo->devices,
 133                        num_devices, NULL, 0, NULL, 0, DS_SELECT_ADD,
 134                        maxshowdevs, 0) == -1)
 135                 errx(1, "%s", devstat_errbuf);
 136
 137         return(1);
 138 }
 139
 140 int
 141 dscmd(const char *cmd, char *args, int maxshowdevs, struct statinfo *s1)
 142 {
 143         int retval;
 144
 145         if (prefix(cmd, "display") || prefix(cmd, "add"))
 146                 return(dsselect(args, DS_SELECT_ADDONLY, maxshowdevs, s1));
 147         if (prefix(cmd, "ignore") || prefix(cmd, "delete"))
 148                 return(dsselect(args, DS_SELECT_REMOVE, maxshowdevs, s1));
 149         if (prefix(cmd, "show") || prefix(cmd, "only"))
 150                 return(dsselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 151         if (prefix(cmd, "type") || prefix(cmd, "match"))
 152                 return(dsmatchselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 153         if (prefix(cmd, "refresh")) {
 154                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 155                                     &select_generation, generation,
 156                                     s1->dinfo->devices, num_devices,
 157                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 158                                         matches : NULL,
 159                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 160                                         num_matches : 0,
 161                                     (last_type == DS_MATCHTYPE_SPEC) ?
 162                                         specified_devices : NULL,
 163                                     (last_type == DS_MATCHTYPE_SPEC) ?
 164                                         num_devices_specified : 0,
 165                                     (last_type == DS_MATCHTYPE_NONE) ?
 166                                         DS_SELECT_ADD : DS_SELECT_ADDONLY,
 167                                     maxshowdevs, 0);
 168                 if (retval == -1) {
 169                         warnx("%s", devstat_errbuf);
 170                         return(0);
 171                 } else if (retval == 1)
 172                         return(2);
 173         }
 174         if (prefix(cmd, "drives")) {
 175                 int i;
 176                 move(CMDLINE, 0);
 177                 clrtoeol();
 178                 for (i = 0; i < num_devices; i++) {
 179                         printw("%s%d ", s1->dinfo->devices[i].device_name,
 180                                s1->dinfo->devices[i].unit_number);
 181                 }
 182                 return(1);
 183         }
 184         return(0);
 185 }
 186
 187 static int
 188 dsmatchselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 189               struct statinfo *s1)
 190 {
 191         char **tempstr;
 192         char *tstr[100];
 193         int num_args = 0;
 194         int i;
 195         int retval = 0;
 196
 197         /*
 198          * Break the (pipe delimited) input string out into separate
 199          * strings.
 200          */
 201         for (tempstr = tstr, num_args  = 0;
 202              (*tempstr = strsep(&args, "|")) != NULL && (num_args < 100);
 203              num_args++)
 204                 if (**tempstr != '\0')
 205                         if (++tempstr >= &tstr[100])
 206                                 break;
 207
 208         if (num_args > 99) {
 209                 warnx("dsmatchselect: too many match arguments");
 210                 return(0);
 211         }
 212
 213         /*
 214          * If we've gone through the matching code before, clean out
 215          * previously used memory.
 216          */
 217         if (num_matches > 0) {
 218                 free(matches);
 219                 matches = NULL;
 220                 num_matches = 0;
 221         }
 222
 223         for (i = 0; i < num_args; i++) {
 224                 if (buildmatch(tstr[i], &matches, &num_matches) != 0) {
 225                         warnx("%s", devstat_errbuf);
 226                         return(0);
 227                 }
 228         }
 229         if (num_args > 0) {
 230
 231                 last_type = DS_MATCHTYPE_PATTERN;
 232
 233                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 234                                     &select_generation, generation,
 235                                     s1->dinfo->devices, num_devices, matches,
 236                                     num_matches, NULL, 0, select_mode,
 237                                     maxshowdevs, 0);
 238                 if (retval == -1)
 239                         err(1, "device selection error");
 240                 else if (retval == 1)
 241                         return(2);
 242         }
 243         return(1);
 244 }
 245
 246 static int
 247 dsselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 248          struct statinfo *s1)
 249 {
 250         char *cp;
 251         int i;
 252         int retval = 0;
 253
 254         /*
 255          * If we've gone through this code before, free previously
 256          * allocated resources.
 257          */
 258         if (num_devices_specified > 0) {
 259                 for (i = 0; i < num_devices_specified; i++)
 260                         free(specified_devices[i]);
 261                 free(specified_devices);
 262                 specified_devices = NULL;
 263                 num_devices_specified = 0;
 264         }
 265
 266         /* do an initial malloc */
 267         specified_devices = (char **)malloc(sizeof(char *));
 268
 269         cp = strchr(args, '\n');
 270         if (cp)
 271                 *cp = '\0';
 272         for (;;) {
 273                 for (cp = args; *cp && isspace(*cp); cp++)
 274                         ;
 275                 args = cp;
 276                 for (; *cp && !isspace(*cp); cp++)
 277                         ;
 278                 if (*cp)
 279                         *cp++ = '\0';
 280                 if (cp - args == 0)
 281                         break;
 282                 for (i = 0; i < num_devices; i++) {
 283                         char tmpstr[80];
 284
 285                         sprintf(tmpstr, "%s%d", dev_select[i].device_name,
 286                                 dev_select[i].unit_number);
 287                         if (strcmp(args, tmpstr) == 0) {
 288
 289                                 num_devices_specified++;
 290
 291                                 specified_devices =(char **)realloc(
 292                                                 specified_devices,
 293                                                 sizeof(char *) *
 294                                                 num_devices_specified);
 295                                 specified_devices[num_devices_specified -1]=
 296                                         strdup(args);
 297
 298                                 break;
 299                         }
 300                 }
 301                 if (i >= num_devices)
 302                         error("%s: unknown drive", args);
 303                 args = cp;
 304         }
 305
 306         if (num_devices_specified > 0) {
 307                 last_type = DS_MATCHTYPE_SPEC;
 308
 309                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 310                                     &select_generation, generation,
 311                                     s1->dinfo->devices, num_devices, NULL, 0,
 312                                     specified_devices, num_devices_specified,
 313                                     select_mode, maxshowdevs, 0);
 314                 if (retval == -1)
 315                         err(1, "%s", devstat_errbuf);
 316                 else if (retval == 1)
 317                         return(2);
 318         }
 319         return(1);
 320 }