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  * 3. 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 <unistd.h>
  71 #include <ctype.h>
  72 #include <err.h>
  73 #include "systat.h"
  74 #include "extern.h"
  75 #include "devs.h"
  76
  77 typedef enum {
  78         DS_MATCHTYPE_NONE,
  79         DS_MATCHTYPE_SPEC,
  80         DS_MATCHTYPE_PATTERN
  81 } last_match_type;
  82
  83 last_match_type last_type;
  84 struct device_selection *dev_select;
  85 long generation;
  86 int num_devices, num_selected;
  87 int num_selections;
  88 long select_generation;
  89 struct devstat_match *matches = NULL;
  90 int num_matches = 0;
  91 char **specified_devices;
  92 int num_devices_specified = 0;
  93
  94 static void dsinit_ignores(int maxshowdevs, struct statinfo *s1);
  95 static int dsmatchselect(char *args, devstat_select_mode select_mode,
  96                          int maxshowdevs, struct statinfo *s1);
  97 static int dsselect(char *args, devstat_select_mode select_mode,
  98                     int maxshowdevs, struct statinfo *s1);
  99
 100 int
 101 dsinit(int maxshowdevs, struct statinfo *s1, struct statinfo *s2 __unused,
 102        struct statinfo *s3 __unused)
 103 {
 104
 105         /*
 106          * Make sure that the userland devstat version matches the kernel
 107          * devstat version.  If not, exit and print a message informing
 108          * the user of his mistake.
 109          */
 110         if (checkversion() < 0)
 111                 errx(1, "%s", devstat_errbuf);
 112
 113         generation = 0;
 114         num_devices = 0;
 115         num_selected = 0;
 116         num_selections = 0;
 117         select_generation = 0;
 118         last_type = DS_MATCHTYPE_NONE;
 119
 120         if (getdevs(s1) == -1)
 121                 errx(1, "%s", devstat_errbuf);
 122
 123         num_devices = s1->dinfo->numdevs;
 124         generation = s1->dinfo->generation;
 125
 126         dev_select = NULL;
 127
 128         /*
 129          * At this point, selectdevs will almost surely indicate that the
 130          * device list has changed, so we don't look for return values of 0
 131          * or 1.  If we get back -1, though, there is an error.
 132          */
 133         if (selectdevs(&dev_select, &num_selected, &num_selections,
 134                        &select_generation, generation, s1->dinfo->devices,
 135                        num_devices, NULL, 0, NULL, 0, DS_SELECT_ADD,
 136                        maxshowdevs, 0) == -1) {
 137                 errx(1, "%s", devstat_errbuf);
 138         }
 139         dsinit_ignores(maxshowdevs, s1);
 140
 141         return(1);
 142 }
 143
 144 /*
 145  * Clean up the device list a bit by removing devices people usually
 146  * aren't interested in.
 147  */
 148 static
 149 void
 150 dsinit_ignores(int maxshowdevs, struct statinfo *s1)
 151 {
 152         char tmp[64];
 153
 154         snprintf(tmp, sizeof(tmp), "md*");
 155         dscmd("ignore", tmp, maxshowdevs, s1);
 156         snprintf(tmp, sizeof(tmp), "pass*");
 157         dscmd("ignore", tmp, maxshowdevs, s1);
 158         snprintf(tmp, sizeof(tmp), "sg*");
 159         dscmd("ignore", tmp, maxshowdevs, s1);
 160 }
 161
 162 int
 163 dscmd(const char *cmd, char *args, int maxshowdevs, struct statinfo *s1)
 164 {
 165         int retval;
 166
 167         if (prefix(cmd, "display") || prefix(cmd, "add"))
 168                 return(dsselect(args, DS_SELECT_ADDONLY, maxshowdevs, s1));
 169         if (prefix(cmd, "ignore") || prefix(cmd, "delete"))
 170                 return(dsselect(args, DS_SELECT_REMOVE, maxshowdevs, s1));
 171         if (prefix(cmd, "show") || prefix(cmd, "only"))
 172                 return(dsselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 173         if (prefix(cmd, "type") || prefix(cmd, "match"))
 174                 return(dsmatchselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 175         if (prefix(cmd, "refresh")) {
 176                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 177                                     &select_generation, generation,
 178                                     s1->dinfo->devices, num_devices,
 179                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 180                                         matches : NULL,
 181                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 182                                         num_matches : 0,
 183                                     (last_type == DS_MATCHTYPE_SPEC) ?
 184                                         specified_devices : NULL,
 185                                     (last_type == DS_MATCHTYPE_SPEC) ?
 186                                         num_devices_specified : 0,
 187                                     (last_type == DS_MATCHTYPE_NONE) ?
 188                                         DS_SELECT_ADD : DS_SELECT_ADDONLY,
 189                                     maxshowdevs, 0);
 190
 191                 /*
 192                  * refresh resets the list, ignore some non-useful devices
 193                  */
 194                 dsinit_ignores(maxshowdevs, s1);
 195
 196                 if (retval == -1) {
 197                         warnx("%s", devstat_errbuf);
 198                         return(0);
 199                 } else if (retval == 1) {
 200                         return(2);
 201                 }
 202         }
 203         if (prefix(cmd, "drives")) {
 204                 int i;
 205                 move(CMDLINE, 0);
 206                 clrtoeol();
 207                 for (i = 0; i < num_devices; i++) {
 208                         printw("%s%d ", s1->dinfo->devices[i].device_name,
 209                                s1->dinfo->devices[i].unit_number);
 210                 }
 211                 return(1);
 212         }
 213         return(0);
 214 }
 215
 216 static int
 217 dsmatchselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 218               struct statinfo *s1)
 219 {
 220         char **tempstr;
 221         char *tstr[100];
 222         int num_args = 0;
 223         int i;
 224         int retval = 0;
 225
 226         /*
 227          * Break the (pipe delimited) input string out into separate
 228          * strings.
 229          */
 230         for (tempstr = tstr, num_args  = 0;
 231              (*tempstr = strsep(&args, "|")) != NULL && (num_args < 100);
 232              num_args++)
 233                 if (**tempstr != '\0')
 234                         if (++tempstr >= &tstr[100])
 235                                 break;
 236
 237         if (num_args > 99) {
 238                 warnx("dsmatchselect: too many match arguments");
 239                 return(0);
 240         }
 241
 242         /*
 243          * If we've gone through the matching code before, clean out
 244          * previously used memory.
 245          */
 246         if (num_matches > 0) {
 247                 free(matches);
 248                 matches = NULL;
 249                 num_matches = 0;
 250         }
 251
 252         for (i = 0; i < num_args; i++) {
 253                 if (buildmatch(tstr[i], &matches, &num_matches) != 0) {
 254                         warnx("%s", devstat_errbuf);
 255                         return(0);
 256                 }
 257         }
 258         if (num_args > 0) {
 259
 260                 last_type = DS_MATCHTYPE_PATTERN;
 261
 262                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 263                                     &select_generation, generation,
 264                                     s1->dinfo->devices, num_devices, matches,
 265                                     num_matches, NULL, 0, select_mode,
 266                                     maxshowdevs, 0);
 267                 if (retval == -1)
 268                         err(1, "device selection error");
 269                 else if (retval == 1)
 270                         return(2);
 271         }
 272         return(1);
 273 }
 274
 275 static int
 276 dsselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 277          struct statinfo *s1)
 278 {
 279         char *cp;
 280         int i;
 281         int retval = 0;
 282         int iswild;
 283
 284         /*
 285          * If we've gone through this code before, free previously
 286          * allocated resources.
 287          */
 288         if (num_devices_specified > 0) {
 289                 for (i = 0; i < num_devices_specified; i++)
 290                         free(specified_devices[i]);
 291                 free(specified_devices);
 292                 specified_devices = NULL;
 293                 num_devices_specified = 0;
 294         }
 295
 296         /* do an initial malloc */
 297         specified_devices = (char **)malloc(sizeof(char *));
 298
 299         cp = strchr(args, '\n');
 300         if (cp)
 301                 *cp = '\0';
 302         for (;;) {
 303                 for (cp = args; *cp && isspace(*cp); cp++)
 304                         ;
 305                 args = cp;
 306                 for (; *cp && !isspace(*cp); cp++)
 307                         ;
 308                 if (*cp)
 309                         *cp++ = '\0';
 310                 if (cp - args == 0)
 311                         break;
 312                 if (cp[-1] == '*') {
 313                         cp[-1] = 0;
 314                         iswild = 1;
 315                 } else {
 316                         iswild = 0;
 317                 }
 318
 319                 for (i = 0; i < num_devices; i++) {
 320                         char tmpstr[80];
 321
 322                         sprintf(tmpstr, "%s%d", dev_select[i].device_name,
 323                                 dev_select[i].unit_number);
 324                         if (strcmp(args, tmpstr) == 0 ||
 325                             (iswild &&
 326                              strcmp(args, dev_select[i].device_name) == 0)) {
 327                                 num_devices_specified++;
 328
 329                                 specified_devices =(char **)realloc(
 330                                                 specified_devices,
 331                                                 sizeof(char *) *
 332                                                 num_devices_specified);
 333                                 specified_devices[num_devices_specified - 1] =
 334                                         strdup(tmpstr);
 335                         }
 336                 }
 337 #if 0
 338                 /* don't complain if device not known */
 339                 if (i >= num_devices)
 340                         error("%s: unknown drive", args);
 341 #endif
 342                 args = cp;
 343         }
 344
 345         if (num_devices_specified > 0) {
 346                 last_type = DS_MATCHTYPE_SPEC;
 347
 348                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 349                                     &select_generation, generation,
 350                                     s1->dinfo->devices, num_devices, NULL, 0,
 351                                     specified_devices, num_devices_specified,
 352                                     select_mode, maxshowdevs, 0);
 353                 if (retval == -1)
 354                         err(1, "%s", devstat_errbuf);
 355                 else if (retval == 1)
 356                         return(2);
 357         }
 358         return(1);
 359 }