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 1.6 2004/12/22 11:01:49 joerg 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. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  */
  67
  68 #include <sys/types.h>
  69 #include <sys/devicestat.h>
  70
  71 #include <string.h>
  72 #include <devstat.h>
  73 #include <stdlib.h>
  74 #include <ctype.h>
  75 #include <err.h>
  76 #include "systat.h"
  77 #include "extern.h"
  78 #include "devs.h"
  79
  80 typedef enum {
  81         DS_MATCHTYPE_NONE,
  82         DS_MATCHTYPE_SPEC,
  83         DS_MATCHTYPE_PATTERN
  84 } last_match_type;
  85
  86 last_match_type last_type;
  87 struct device_selection *dev_select;
  88 long generation;
  89 int num_devices, num_selected;
  90 int num_selections;
  91 long select_generation;
  92 struct devstat_match *matches = NULL;
  93 int num_matches = 0;
  94 char **specified_devices;
  95 int num_devices_specified = 0;
  96
  97 static int dsmatchselect(char *args, devstat_select_mode select_mode,
  98                          int maxshowdevs, struct statinfo *s1);
  99 static int dsselect(char *args, devstat_select_mode select_mode,
 100                     int maxshowdevs, struct statinfo *s1);
 101
 102 int
 103 dsinit(int maxshowdevs, struct statinfo *s1, struct statinfo *s2,
 104        struct statinfo *s3)
 105 {
 106
 107         /*
 108          * Make sure that the userland devstat version matches the kernel
 109          * devstat version.  If not, exit and print a message informing
 110          * the user of his mistake.
 111          */
 112         if (checkversion() < 0)
 113                 errx(1, "%s", devstat_errbuf);
 114
 115         generation = 0;
 116         num_devices = 0;
 117         num_selected = 0;
 118         num_selections = 0;
 119         select_generation = 0;
 120         last_type = DS_MATCHTYPE_NONE;
 121
 122         if (getdevs(s1) == -1)
 123                 errx(1, "%s", devstat_errbuf);
 124
 125         num_devices = s1->dinfo->numdevs;
 126         generation = s1->dinfo->generation;
 127
 128         dev_select = NULL;
 129
 130         /*
 131          * At this point, selectdevs will almost surely indicate that the
 132          * device list has changed, so we don't look for return values of 0
 133          * or 1.  If we get back -1, though, there is an error.
 134          */
 135         if (selectdevs(&dev_select, &num_selected, &num_selections,
 136                        &select_generation, generation, s1->dinfo->devices,
 137                        num_devices, NULL, 0, NULL, 0, DS_SELECT_ADD,
 138                        maxshowdevs, 0) == -1)
 139                 errx(1, "%s", devstat_errbuf);
 140
 141         return(1);
 142 }
 143
 144 int
 145 dscmd(char *cmd, char *args, int maxshowdevs, struct statinfo *s1)
 146 {
 147         int retval;
 148
 149         if (prefix(cmd, "display") || prefix(cmd, "add"))
 150                 return(dsselect(args, DS_SELECT_ADDONLY, maxshowdevs, s1));
 151         if (prefix(cmd, "ignore") || prefix(cmd, "delete"))
 152                 return(dsselect(args, DS_SELECT_REMOVE, maxshowdevs, s1));
 153         if (prefix(cmd, "show") || prefix(cmd, "only"))
 154                 return(dsselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 155         if (prefix(cmd, "type") || prefix(cmd, "match"))
 156                 return(dsmatchselect(args, DS_SELECT_ONLY, maxshowdevs, s1));
 157         if (prefix(cmd, "refresh")) {
 158                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 159                                     &select_generation, generation,
 160                                     s1->dinfo->devices, num_devices,
 161                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 162                                         matches : NULL,
 163                                     (last_type == DS_MATCHTYPE_PATTERN) ?
 164                                         num_matches : 0,
 165                                     (last_type == DS_MATCHTYPE_SPEC) ?
 166                                         specified_devices : NULL,
 167                                     (last_type == DS_MATCHTYPE_SPEC) ?
 168                                         num_devices_specified : 0,
 169                                     (last_type == DS_MATCHTYPE_NONE) ?
 170                                         DS_SELECT_ADD : DS_SELECT_ADDONLY,
 171                                     maxshowdevs, 0);
 172                 if (retval == -1) {
 173                         warnx("%s", devstat_errbuf);
 174                         return(0);
 175                 } else if (retval == 1)
 176                         return(2);
 177         }
 178         if (prefix(cmd, "drives")) {
 179                 register int i;
 180                 move(CMDLINE, 0);
 181                 clrtoeol();
 182                 for (i = 0; i < num_devices; i++) {
 183                         printw("%s%d ", s1->dinfo->devices[i].device_name,
 184                                s1->dinfo->devices[i].unit_number);
 185                 }
 186                 return(1);
 187         }
 188         return(0);
 189 }
 190
 191 static int
 192 dsmatchselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 193               struct statinfo *s1)
 194 {
 195         char **tempstr;
 196         char *tstr[100];
 197         int num_args = 0;
 198         register int i;
 199         int retval = 0;
 200
 201         /*
 202          * Break the (pipe delimited) input string out into separate
 203          * strings.
 204          */
 205         for (tempstr = tstr, num_args  = 0;
 206              (*tempstr = strsep(&args, "|")) != NULL && (num_args < 100);
 207              num_args++)
 208                 if (**tempstr != '\0')
 209                         if (++tempstr >= &tstr[100])
 210                                 break;
 211
 212         if (num_args > 99) {
 213                 warnx("dsmatchselect: too many match arguments");
 214                 return(0);
 215         }
 216
 217         /*
 218          * If we've gone through the matching code before, clean out
 219          * previously used memory.
 220          */
 221         if (num_matches > 0) {
 222                 free(matches);
 223                 matches = NULL;
 224                 num_matches = 0;
 225         }
 226
 227         for (i = 0; i < num_args; i++) {
 228                 if (buildmatch(tstr[i], &matches, &num_matches) != 0) {
 229                         warnx("%s", devstat_errbuf);
 230                         return(0);
 231                 }
 232         }
 233         if (num_args > 0) {
 234
 235                 last_type = DS_MATCHTYPE_PATTERN;
 236
 237                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 238                                     &select_generation, generation,
 239                                     s1->dinfo->devices, num_devices, matches,
 240                                     num_matches, NULL, 0, select_mode,
 241                                     maxshowdevs, 0);
 242                 if (retval == -1)
 243                         err(1, "device selection error");
 244                 else if (retval == 1)
 245                         return(2);
 246         }
 247         return(1);
 248 }
 249
 250 static int
 251 dsselect(char *args, devstat_select_mode select_mode, int maxshowdevs,
 252          struct statinfo *s1)
 253 {
 254         register char *cp;
 255         register int i;
 256         int retval = 0;
 257
 258         /*
 259          * If we've gone through this code before, free previously
 260          * allocated resources.
 261          */
 262         if (num_devices_specified > 0) {
 263                 for (i = 0; i < num_devices_specified; i++)
 264                         free(specified_devices[i]);
 265                 free(specified_devices);
 266                 specified_devices = NULL;
 267                 num_devices_specified = 0;
 268         }
 269
 270         /* do an initial malloc */
 271         specified_devices = (char **)malloc(sizeof(char *));
 272
 273         cp = strchr(args, '\n');
 274         if (cp)
 275                 *cp = '\0';
 276         for (;;) {
 277                 for (cp = args; *cp && isspace(*cp); cp++)
 278                         ;
 279                 args = cp;
 280                 for (; *cp && !isspace(*cp); cp++)
 281                         ;
 282                 if (*cp)
 283                         *cp++ = '\0';
 284                 if (cp - args == 0)
 285                         break;
 286                 for (i = 0; i < num_devices; i++) {
 287                         char tmpstr[80];
 288
 289                         sprintf(tmpstr, "%s%d", dev_select[i].device_name,
 290                                 dev_select[i].unit_number);
 291                         if (strcmp(args, tmpstr) == 0) {
 292
 293                                 num_devices_specified++;
 294
 295                                 specified_devices =(char **)realloc(
 296                                                 specified_devices,
 297                                                 sizeof(char *) *
 298                                                 num_devices_specified);
 299                                 specified_devices[num_devices_specified -1]=
 300                                         strdup(args);
 301
 302                                 break;
 303                         }
 304                 }
 305                 if (i >= num_devices)
 306                         error("%s: unknown drive", args);
 307                 args = cp;
 308         }
 309
 310         if (num_devices_specified > 0) {
 311                 last_type = DS_MATCHTYPE_SPEC;
 312
 313                 retval = selectdevs(&dev_select, &num_selected, &num_selections,
 314                                     &select_generation, generation,
 315                                     s1->dinfo->devices, num_devices, NULL, 0,
 316                                     specified_devices, num_devices_specified,
 317                                     select_mode, maxshowdevs, 0);
 318                 if (retval == -1)
 319                         err(1, "%s", devstat_errbuf);
 320                 else if (retval == 1)
 321                         return(2);
 322         }
 323         return(1);
 324 }