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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 1998 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma init(ld_support_init)
27
28#include <stdio.h>
29#include <unistd.h>
30#include <stdlib.h>
31#include <string.h>
32#include <libelf.h>
33#include <sys/param.h>
34#include <link.h>
35
36#define	SUNPRO_DEPENDENCIES	"SUNPRO_DEPENDENCIES"
37
38/*
39 * Linked list of strings - used to keep lists of names
40 * of directories or files.
41 */
42
43struct Stritem {
44	char		*str;
45	void		*next;
46};
47
48typedef struct Stritem	Stritem;
49
50static char		*depend_file = NULL;
51static Stritem		*list = NULL;
52
53void
54mk_state_init(void)
55{
56	depend_file = getenv(SUNPRO_DEPENDENCIES);
57} /* mk_state_init() */
58
59static void
60prepend_str(Stritem **list, const char *str)
61{
62	Stritem *new;
63	char	*newstr;
64
65	if (!(new = calloc(1, sizeof (Stritem)))) {
66		perror("libmakestate.so");
67		return;
68	} /* if */
69
70	if (!(newstr = malloc(strlen(str) + 1))) {
71		perror("libmakestate.so");
72		return;
73	} /* if */
74
75	new->str = strcpy(newstr, str);
76	new->next = *list;
77	*list = new;
78
79} /* prepend_str() */
80
81void
82mk_state_collect_dep(const char *file)
83{
84	/*
85	 * SUNPRO_DEPENDENCIES wasn't set, we don't collect .make.state
86	 * information.
87	 */
88	if (!depend_file)
89		return;
90
91	prepend_str(&list, file);
92
93}  /* mk_state_collect_dep() */
94
95void
96mk_state_update_exit()
97{
98	Stritem		*cur;
99	char		  lockfile[MAXPATHLEN],	*err, *space, *target;
100	FILE		*ofp;
101	extern char	*file_lock(char *, char *, int);
102
103	if (!depend_file)
104		return;
105
106	if ((space = strchr(depend_file, ' ')) == NULL)
107		return;
108	*space = '\0';
109	target = &space[1];
110
111	(void) sprintf(lockfile, "%s.lock", depend_file);
112	if ((err = file_lock(depend_file, lockfile, 0))) {
113		(void) fprintf(stderr, "%s\n", err);
114		return;
115	} /* if */
116
117	if (!(ofp = fopen(depend_file, "a")))
118		return;
119
120	if (list)
121		(void) fprintf(ofp, "%s: ", target);
122
123	for (cur = list; cur; cur = cur->next)
124		(void) fprintf(ofp, " %s", cur->str);
125
126	(void) fputc('\n', ofp);
127
128	(void) fclose(ofp);
129	(void) unlink(lockfile);
130	*space = ' ';
131
132} /* mk_state_update_exit() */
133
134static void
135ld_support_init()
136{
137	mk_state_init();
138
139} /* ld_support_init() */
140
141void
142ld_file(const char *file, const Elf_Kind ekind, int flags, Elf *elf)
143{
144	if (!((flags & LD_SUP_DERIVED) && !(flags & LD_SUP_EXTRACTED)))
145		return;
146
147	mk_state_collect_dep(file);
148
149} /* ld_file */
150
151void
152ld_atexit(int exit_code)
153{
154	if (exit_code)
155		return;
156
157	mk_state_update_exit();
158
159} /* ld_atexit() */
160
161/*
162 * Supporting 64-bit objects
163 */
164void
165ld_file64(const char *file, const Elf_Kind ekind, int flags, Elf *elf)
166{
167	if (!((flags & LD_SUP_DERIVED) && !(flags & LD_SUP_EXTRACTED)))
168		return;
169
170	mk_state_collect_dep(file);
171
172} /* ld_file64 */
173
174void
175ld_atexit64(int exit_code)
176{
177	if (exit_code)
178		return;
179
180	mk_state_update_exit();
181
182} /* ld_atexit64() */
183