xref: /titanic_51/usr/src/lib/libproject/common/project_walk.c (revision 37714ae43602c675f9dc59b070bfdf9fa702872c)
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 (c) 2001 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <sys/syscall.h>
30 
31 #include <project.h>
32 #include <stdlib.h>
33 #include <errno.h>
34 
35 static size_t
36 projlist(id_t *idbuf, size_t idbufsz)
37 {
38 	return (syscall(SYS_tasksys, 3, 0, 0, idbuf, idbufsz));
39 }
40 
41 int
42 project_walk(int (*callback)(projid_t, void *), void *init_data)
43 {
44 	int ret = 0;
45 	projid_t *projids = NULL;
46 	projid_t *curr_projid;
47 	size_t sz;
48 	size_t osz = 0;
49 
50 	while ((sz = projlist(projids, osz * sizeof (projid_t))) != osz) {
51 		osz = sz;
52 		curr_projid = projids;
53 		if ((projids = realloc(projids, sz * sizeof (projid_t)))
54 		    == NULL) {
55 			/*
56 			 * If realloc() fails, we return ENOMEM.
57 			 */
58 			if (errno == EAGAIN)
59 				errno = ENOMEM;
60 			if (curr_projid != NULL)
61 				free(curr_projid);
62 			return (-1);
63 		}
64 	}
65 
66 	for (curr_projid = projids; curr_projid < projids + sz; curr_projid++) {
67 		if (ret = callback(*curr_projid, init_data))
68 			break;
69 	}
70 
71 	free(projids);
72 	return (ret);
73 }
74