GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/amd/amd/info_union.c Lines: 0 35 0.0 %
Date: 2017-11-13 Branches: 0 18 0.0 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 1990 Jan-Simon Pendry
3
 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
4
 * Copyright (c) 1990, 1993
5
 *	The Regents of the University of California.  All rights reserved.
6
 *
7
 * This code is derived from software contributed to Berkeley by
8
 * Jan-Simon Pendry at Imperial College, London.
9
 *
10
 * Redistribution and use in source and binary forms, with or without
11
 * modification, are permitted provided that the following conditions
12
 * are met:
13
 * 1. Redistributions of source code must retain the above copyright
14
 *    notice, this list of conditions and the following disclaimer.
15
 * 2. Redistributions in binary form must reproduce the above copyright
16
 *    notice, this list of conditions and the following disclaimer in the
17
 *    documentation and/or other materials provided with the distribution.
18
 * 3. Neither the name of the University nor the names of its contributors
19
 *    may be used to endorse or promote products derived from this software
20
 *    without specific prior written permission.
21
 *
22
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32
 * SUCH DAMAGE.
33
 *
34
 *	from: @(#)info_union.c	8.1 (Berkeley) 6/6/93
35
 *	$Id: info_union.c,v 1.9 2014/10/26 03:03:34 guenther Exp $
36
 */
37
38
/*
39
 * Get info from the system namespace
40
 *
41
 * NOTE: Cannot handle reads back through the automounter.
42
 * THIS WILL CAUSE A DEADLOCK!
43
 */
44
45
#include "am.h"
46
47
48
#include <dirent.h>
49
#define	DIRENT struct dirent
50
51
#define	UNION_PREFIX	"union:"
52
#define	UNION_PREFLEN	6
53
54
/*
55
 * No way to probe - check the map name begins with "union:"
56
 */
57
int
58
union_init(char *map, time_t *tp)
59
{
60
	*tp = 0;
61
	return strncmp(map, UNION_PREFIX, UNION_PREFLEN) == 0 ? 0 : ENOENT;
62
}
63
64
int
65
union_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
66
{
67
	char *mapd = strdup(map + UNION_PREFLEN);
68
	char **v = strsplit(mapd, ':', '\"');
69
	char **p;
70
71
	for (p = v; p[1]; p++)
72
		;
73
	*pval = xmalloc(strlen(*p) + 5);
74
	snprintf(*pval, strlen(*p) + 5, "fs:=%s", *p);
75
	free(mapd);
76
	free(v);
77
	return 0;
78
}
79
80
int
81
union_reload(mnt_map *m, char *map, void (*fn)(mnt_map *, char *, char *))
82
{
83
	char *mapd = strdup(map + UNION_PREFLEN);
84
	char **v = strsplit(mapd, ':', '\"');
85
	char **dir;
86
87
	/*
88
	 * Add fake /defaults entry
89
	 */
90
	(*fn)(m, strdup("/defaults"),
91
	    strdup("type:=link;opts:=nounmount;sublink:=${key}"));
92
93
	for (dir = v; *dir; dir++) {
94
		DIR *dirp = opendir(*dir);
95
		DIRENT *dp;
96
		int dlen;
97
98
		if (!dirp) {
99
			plog(XLOG_USER, "Cannot read directory %s: %m", *dir);
100
			continue;
101
		}
102
		dlen = strlen(*dir);
103
#ifdef DEBUG
104
		dlog("Reading directory %s...", *dir);
105
#endif
106
		while ((dp = readdir(dirp))) {
107
			char *val;
108
109
			if (dp->d_name[0] == '.' &&
110
			    (dp->d_name[1] == '\0' ||
111
			    (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
112
				continue;
113
114
#ifdef DEBUG
115
			dlog("... gives %s", dp->d_name);
116
#endif
117
			val = xmalloc(dlen + 5);
118
			snprintf(val, dlen + 5, "fs:=%s", *dir);
119
			(*fn)(m, strdup(dp->d_name), val);
120
		}
121
		closedir(dirp);
122
	}
123
124
	/*
125
	 * Add wildcard entry
126
	 */
127
	{
128
		char *val = xmalloc(strlen(dir[-1]) + 5);
129
130
		snprintf(val, strlen(dir[-1]) + 5, "fs:=%s", dir[-1]);
131
		(*fn)(m, strdup("*"), val);
132
	}
133
	free(mapd);
134
	free(v);
135
	return 0;
136
}
137