usr/src/cmd/devfsadm/dcam1394_link.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "devfsadm.h"
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <limits.h>
  33 #include <string.h>
  34
  35 #define DCAM_RE_STRING_LEN      64
  36
  37 #define DCAM_STR_LINK_RE        "^dcam([0-9]+)$"
  38 #define DCAM_CTL_LINK_RE        "^dcamctl([0-9]+)$"
  39
  40 static int dcam1394_process(di_minor_t minor, di_node_t node);
  41
  42 static devfsadm_create_t dcam1394_cbt[] = {
  43         {
  44                 "firewire",
  45                 NULL,
  46                 "dcam",
  47                 DRV_RE,
  48                 ILEVEL_0,
  49                 dcam1394_process
  50         }
  51 };
  52
  53 static char *debug_mid = "dcam1394_mid";
  54
  55 DEVFSADM_CREATE_INIT_V0(dcam1394_cbt);
  56
  57
  58 static devfsadm_remove_t dcam1394_remove_cbt[] = {
  59         {
  60                 "firewire",
  61                 DCAM_STR_LINK_RE,
  62                 RM_PRE | RM_HOT | RM_ALWAYS,
  63                 ILEVEL_0,
  64                 devfsadm_rm_all
  65         },
  66         {
  67                 "firewire",
  68                 DCAM_CTL_LINK_RE,
  69                 RM_PRE | RM_HOT | RM_ALWAYS,
  70                 ILEVEL_0,
  71                 devfsadm_rm_all
  72         }
  73 };
  74
  75 DEVFSADM_REMOVE_INIT_V0(dcam1394_remove_cbt);
  76
  77 int
  78 minor_init(void)
  79 {
  80         devfsadm_print(debug_mid, "dcam1394_link: minor_init\n");
  81         return (DEVFSADM_SUCCESS);
  82 }
  83
  84 int
  85 minor_fini(void)
  86 {
  87         devfsadm_print(debug_mid, "dcam1394_link: minor_fini\n");
  88         return (DEVFSADM_SUCCESS);
  89 }
  90
  91
  92 /*
  93  * This function is called for every dcam1394 minor node.
  94  * Calls enumerate to assign a logical dcam1394 id, and then
  95  * devfsadm_mklink to make the link.
  96  */
  97 static int
  98 dcam1394_process(di_minor_t minor, di_node_t node)
  99 {
 100         char m_name[PATH_MAX], restring0[DCAM_RE_STRING_LEN];
 101         char l_path[PATH_MAX], p_path[PATH_MAX], *buf, *devfspath;
 102         devfsadm_enumerate_t re[1];
 103
 104         (void) strcpy(m_name, di_minor_name(minor));
 105
 106         if (strcmp(di_driver_name(node), "dcam1394") != 0) {
 107             return (DEVFSADM_CONTINUE);
 108         }
 109
 110         if (strncmp(m_name, "dcamctl", 7) == 0) {
 111                 (void) snprintf(restring0, DCAM_RE_STRING_LEN,
 112                                 DCAM_CTL_LINK_RE);
 113         } else if (strncmp(m_name, "dcam", 4) == 0) {
 114                 (void) snprintf(restring0, DCAM_RE_STRING_LEN,
 115                                 DCAM_STR_LINK_RE);
 116         } else {
 117                 return (DEVFSADM_CONTINUE);
 118         }
 119
 120         re[0].re        = restring0;
 121         re[0].subexp    = 1;
 122         re[0].flags     = MATCH_ALL;
 123
 124         devfsadm_print(debug_mid,
 125             "dcam1394_process: path %s\n", di_devfs_path(node));
 126
 127         (void) strcpy(p_path, devfspath = di_devfs_path(node));
 128         (void) strcat(p_path, ":");
 129         (void) strcat(p_path, di_minor_name(minor));
 130         di_devfs_path_free(devfspath);
 131
 132         /*
 133          * Build the physical path from the components, omitting
 134          * minor name field.  Find the logical dcam1394 id, and
 135          * stuff it in buf.
 136          */
 137         if (devfsadm_enumerate_int(p_path, 0, &buf, re, 1)) {
 138                 devfsadm_print(debug_mid,
 139                     "dcam1394_process: exit/continue\n");
 140                 return (DEVFSADM_CONTINUE);
 141         }
 142
 143         devfsadm_print(debug_mid, "dcam1394_process: p_path=%s buf=%s\n",
 144             p_path, buf);
 145
 146         if (strncmp(di_minor_name(minor), "dcamctl", 7) == 0)
 147                 (void) snprintf(l_path, PATH_MAX, "dcamctl%s", buf);
 148         else
 149                 (void) snprintf(l_path, PATH_MAX, "dcam%s", buf);
 150
 151         (void) devfsadm_mklink(l_path, node, minor, 0);
 152
 153         free(buf);
 154
 155         return (DEVFSADM_CONTINUE);
 156 }