xref: /illumos-gate/usr/src/cmd/devfsadm/dcam1394_link.c (revision 2a8bcb4efb45d99ac41c94a75c396b362c414f7f)
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 #include "devfsadm.h"
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <limits.h>
31 #include <string.h>
32 
33 #define	DCAM_RE_STRING_LEN	64
34 
35 #define	DCAM_STR_LINK_RE	"^dcam([0-9]+)$"
36 #define	DCAM_CTL_LINK_RE	"^dcamctl([0-9]+)$"
37 
38 static int dcam1394_process(di_minor_t minor, di_node_t node);
39 
40 static devfsadm_create_t dcam1394_cbt[] = {
41 	{
42 		"firewire",
43 		NULL,
44 		"dcam",
45 		DRV_RE,
46 		ILEVEL_0,
47 		dcam1394_process
48 	}
49 };
50 
51 static char *debug_mid = "dcam1394_mid";
52 
53 DEVFSADM_CREATE_INIT_V0(dcam1394_cbt);
54 
55 
56 static devfsadm_remove_t dcam1394_remove_cbt[] = {
57 	{
58 		"firewire",
59 		DCAM_STR_LINK_RE,
60 		RM_PRE | RM_HOT | RM_ALWAYS,
61 		ILEVEL_0,
62 		devfsadm_rm_all
63 	},
64 	{
65 		"firewire",
66 		DCAM_CTL_LINK_RE,
67 		RM_PRE | RM_HOT | RM_ALWAYS,
68 		ILEVEL_0,
69 		devfsadm_rm_all
70 	}
71 };
72 
73 DEVFSADM_REMOVE_INIT_V0(dcam1394_remove_cbt);
74 
75 int
minor_init(void)76 minor_init(void)
77 {
78 	devfsadm_print(debug_mid, "dcam1394_link: minor_init\n");
79 	return (DEVFSADM_SUCCESS);
80 }
81 
82 int
minor_fini(void)83 minor_fini(void)
84 {
85 	devfsadm_print(debug_mid, "dcam1394_link: minor_fini\n");
86 	return (DEVFSADM_SUCCESS);
87 }
88 
89 
90 /*
91  * This function is called for every dcam1394 minor node.
92  * Calls enumerate to assign a logical dcam1394 id, and then
93  * devfsadm_mklink to make the link.
94  */
95 static int
dcam1394_process(di_minor_t minor,di_node_t node)96 dcam1394_process(di_minor_t minor, di_node_t node)
97 {
98 	char m_name[PATH_MAX], restring0[DCAM_RE_STRING_LEN];
99 	char l_path[PATH_MAX], p_path[PATH_MAX], *buf, *devfspath;
100 	devfsadm_enumerate_t re[1];
101 
102 	(void) strcpy(m_name, di_minor_name(minor));
103 
104 	if (strcmp(di_driver_name(node), "dcam1394") != 0) {
105 	    return (DEVFSADM_CONTINUE);
106 	}
107 
108 	if (strncmp(m_name, "dcamctl", 7) == 0) {
109 		(void) snprintf(restring0, DCAM_RE_STRING_LEN,
110 				DCAM_CTL_LINK_RE);
111 	} else if (strncmp(m_name, "dcam", 4) == 0) {
112 		(void) snprintf(restring0, DCAM_RE_STRING_LEN,
113 				DCAM_STR_LINK_RE);
114 	} else {
115 		return (DEVFSADM_CONTINUE);
116 	}
117 
118 	re[0].re	= restring0;
119 	re[0].subexp	= 1;
120 	re[0].flags	= MATCH_ALL;
121 
122 	devfsadm_print(debug_mid,
123 	    "dcam1394_process: path %s\n", di_devfs_path(node));
124 
125 	(void) strcpy(p_path, devfspath = di_devfs_path(node));
126 	(void) strcat(p_path, ":");
127 	(void) strcat(p_path, di_minor_name(minor));
128 	di_devfs_path_free(devfspath);
129 
130 	/*
131 	 * Build the physical path from the components, omitting
132 	 * minor name field.  Find the logical dcam1394 id, and
133 	 * stuff it in buf.
134 	 */
135 	if (devfsadm_enumerate_int(p_path, 0, &buf, re, 1)) {
136 		devfsadm_print(debug_mid,
137 		    "dcam1394_process: exit/continue\n");
138 		return (DEVFSADM_CONTINUE);
139 	}
140 
141 	devfsadm_print(debug_mid, "dcam1394_process: p_path=%s buf=%s\n",
142 	    p_path, buf);
143 
144 	if (strncmp(di_minor_name(minor), "dcamctl", 7) == 0)
145 		(void) snprintf(l_path, PATH_MAX, "dcamctl%s", buf);
146 	else
147 		(void) snprintf(l_path, PATH_MAX, "dcam%s", buf);
148 
149 	(void) devfsadm_mklink(l_path, node, minor, 0);
150 
151 	free(buf);
152 
153 	return (DEVFSADM_CONTINUE);
154 }
155