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 2006 Sun Microsystems, Inc.  All rights reserved.
23 *	Use is subject to license terms.
24 */
25#pragma ident	"%Z%%M%	%I%	%E% SMI"
26
27#include	<sys/types.h>
28#include	<stdio.h>
29#include	<errno.h>
30#include	<unistd.h>
31#include	<string.h>
32#include	<wait.h>
33#include	<limits.h>
34#include	"machdep.h"
35#include	"sgs.h"
36#include	"rtc.h"
37#include	"conv.h"
38#include	"_crle.h"
39#include	"msg.h"
40
41/*
42 * Having gathered together any dependencies, dldump(3x) any necessary images.
43 *
44 * All dldump(3x) processing is carried out from the audit library.  The
45 * temporary configuration file is read and all alternative marked files are
46 * dumped.  If a -E application requires RTLD_REL_EXEC then that application
47 * acts as the new process, otherwise lddstub is used.
48 *
49 * Besides dldump(3x)'ing any images the audit library returns the address
50 * range of the images which will used to update the configuration file.
51 */
52int
53dump(Crle_desc * crle)
54{
55	const char	*orgapp = (const char *)crle->c_app;
56	int		fildes[2], pid;
57
58	if (orgapp == 0)
59		orgapp = conv_lddstub(M_CLASS);
60
61	/*
62	 * Set up a pipe through which the audit library will write the image
63	 * address ranges.
64	 */
65	if (pipe(fildes) == -1) {
66		int err = errno;
67		(void) fprintf(stderr, MSG_INTL(MSG_SYS_PIPE),
68		    crle->c_name, strerror(err));
69		return (1);
70	}
71
72	/*
73	 * Fork ourselves to run the application and collect its dependencies.
74	 */
75	if ((pid = fork()) == -1) {
76		int err = errno;
77		(void) fprintf(stderr, MSG_INTL(MSG_SYS_FORK),
78		    crle->c_name, strerror(err));
79		return (1);
80	}
81
82	if (pid) {
83		/*
84		 * Parent. Read memory range entries from the audit library.
85		 * The read side of the pipe is attached to stdio to make
86		 * obtaining the individual dependencies easier.
87		 */
88		int	error = 0, status;
89		FILE	*fd;
90		char	buffer[PATH_MAX];
91
92		(void) close(fildes[1]);
93		if ((fd = fdopen(fildes[0], MSG_ORIG(MSG_STR_READ))) != NULL) {
94			char *str;
95			Rtc_head *rtc = (Rtc_head *)crle->c_tempheadaddr;
96
97			while (fgets(buffer, PATH_MAX, fd) != NULL) {
98				/*
99				 * Make sure we recognize the message, remove
100				 * the newline (which allowed fgets() use) and
101				 * register the memory range entry;
102				 */
103				if (strncmp(MSG_ORIG(MSG_AUD_PRF), buffer,
104				    MSG_AUD_PRF_SIZE))
105					continue;
106
107				str = strrchr(buffer, '\n');
108				*str = '\0';
109				str = buffer + MSG_AUD_PRF_SIZE;
110
111				if (strncmp(MSG_ORIG(MSG_AUD_RESBGN),
112				    str, MSG_AUD_RESBGN_SIZE) == 0) {
113					rtc->ch_resbgn =
114					    strtoull(str + MSG_AUD_RESBGN_SIZE,
115						(char **)NULL, 0);
116				} else if (strncmp(MSG_ORIG(MSG_AUD_RESEND),
117				    str, MSG_AUD_RESEND_SIZE) == 0) {
118					rtc->ch_resend =
119					    strtoull(str + MSG_AUD_RESEND_SIZE,
120						(char **)NULL, 0);
121				} else {
122					continue;
123				}
124			}
125			(void) fclose(fd);
126		} else
127			error = errno;
128
129		while (wait(&status) != pid)
130			;
131		if (status) {
132			if (WIFSIGNALED(status)) {
133				(void) fprintf(stderr,
134				    MSG_INTL(MSG_SYS_EXEC), crle->c_name,
135				    orgapp, (WSIGMASK & status),
136				    ((status & WCOREFLG) ?
137				    MSG_INTL(MSG_SYS_CORE) :
138				    MSG_ORIG(MSG_STR_EMPTY)));
139			}
140			return (status);
141		}
142		return (error);
143	} else {
144		char	efds[MSG_ENV_AUD_FD_SIZE + 10];
145		char	eflg[MSG_ENV_AUD_FLAGS_SIZE + 10];
146		char	ecnf[PATH_MAX];
147
148		(void) close(fildes[0]);
149
150		/*
151		 * Child. Set up environment variables to enable and identify
152		 * auditing.
153		 */
154		(void) snprintf(efds, (MSG_ENV_AUD_FD_SIZE + 10),
155		    MSG_ORIG(MSG_ENV_AUD_FD), fildes[1]);
156		(void) snprintf(eflg, (MSG_ENV_AUD_FLAGS_SIZE + 10),
157		    MSG_ORIG(MSG_ENV_AUD_FLAGS), crle->c_dlflags);
158		(void) snprintf(ecnf, PATH_MAX, MSG_ORIG(MSG_ENV_LD_CONFIG),
159		    crle->c_tempname);
160
161		/*
162		 * Put strings in the environment for exec().
163		 * NOTE, use of automatic variables for construction of the
164		 * environment variables is legitimate here, as they are local
165		 * to the child process and are established solely for exec().
166		 */
167		if ((putenv(efds) != 0) || (putenv(eflg) != 0) ||
168		    (putenv(ecnf) != 0) || (putenv(crle->c_audit) != 0) ||
169		    (putenv((char *)MSG_ORIG(MSG_ENV_LD_FLAGS)) != 0)) {
170			int err = errno;
171			(void) fprintf(stderr, MSG_INTL(MSG_SYS_PUTENV),
172			    crle->c_name, strerror(err));
173			return (1);
174		}
175
176		if (execlp(orgapp, orgapp, 0) == -1) {
177			int err = errno;
178			(void) fprintf(stderr, MSG_INTL(MSG_SYS_EXECLP),
179			    crle->c_name, orgapp, strerror(err));
180			_exit(err);
181			/* NOTREACHED */
182		}
183	}
184	return (0);
185}
186