xref: /titanic_41/usr/src/lib/libcontract/common/libcontract_priv.c (revision 6185db853e024a486ff8837e6784dd290d866112)
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 2004 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 <sys/ctfs.h>
30 #include <unistd.h>
31 #include <fcntl.h>
32 #include <errno.h>
33 #include <limits.h>
34 #include <stdio.h>
35 #include <assert.h>
36 #include <libuutil.h>
37 #include <string.h>
38 #include <procfs.h>
39 #include <libcontract.h>
40 #include <libcontract_priv.h>
41 #include "libcontract_impl.h"
42 #include "process_dump.h"
43 
44 
45 contract_type_t types[CTT_MAXTYPE] = {
46 	{ "process", event_process }
47 };
48 
49 static int
50 close_on_exec(int fd)
51 {
52 	int flags = fcntl(fd, F_GETFD, 0);
53 	if ((flags != -1) && (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) != -1))
54 		return (0);
55 	return (-1);
56 }
57 
58 int
59 contract_latest(ctid_t *id)
60 {
61 	int cfd, r;
62 	ct_stathdl_t st;
63 	ctid_t result;
64 
65 	if ((cfd = open64(CTFS_ROOT "/process/latest", O_RDONLY)) == -1)
66 		return (errno);
67 
68 	if ((r = ct_status_read(cfd, CTD_COMMON, &st)) != 0) {
69 		(void) close(cfd);
70 		return (r);
71 	}
72 
73 	result = ct_status_get_id(st);
74 	ct_status_free(st);
75 	(void) close(cfd);
76 
77 	*id = result;
78 	return (0);
79 }
80 
81 int
82 contract_open(ctid_t ctid, const char *type, const char *file, int oflag)
83 {
84 	char path[PATH_MAX];
85 	int n, fd;
86 
87 	assert((oflag & O_CREAT) == 0);
88 
89 	if (type == NULL)
90 		type = "all";
91 
92 	n = snprintf(path, PATH_MAX, CTFS_ROOT "/%s/%ld/%s", type, ctid, file);
93 	if (n >= PATH_MAX) {
94 		errno = ENAMETOOLONG;
95 		return (-1);
96 	}
97 
98 	fd = open64(path, oflag);
99 	if (fd != -1) {
100 		if (close_on_exec(fd) == -1) {
101 			int err = errno;
102 			(void) close(fd);
103 			errno = err;
104 			return (-1);
105 		}
106 	}
107 	return (fd);
108 }
109 
110 int
111 contract_abandon_id(ctid_t ctid)
112 {
113 	int fd, err;
114 
115 	fd = contract_open(ctid, "all", "ctl", O_WRONLY);
116 	if (fd == -1)
117 		return (errno);
118 
119 	err = ct_ctl_abandon(fd);
120 	(void) close(fd);
121 
122 	return (err);
123 }
124 
125 ctid_t
126 getctid(void)
127 {
128 	int fd;
129 	psinfo_t ps;
130 
131 	if ((fd = open("/proc/self/psinfo", O_RDONLY)) == -1)
132 		return (-1);
133 	if (read(fd, &ps, sizeof (ps)) != sizeof (ps)) {
134 		(void) close(fd);
135 		return (-1);
136 	}
137 	(void) close(fd);
138 	return (ps.pr_contract);
139 }
140 
141 void
142 contract_event_dump(FILE *file, ct_evthdl_t hdl, int verbose)
143 {
144 	ct_typeid_t type;
145 	struct ctlib_event_info *info = hdl;
146 
147 	type = info->event.ctev_cttype;
148 	types[type].type_event(file, hdl, verbose);
149 }
150