1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* The new sysinstall program.
*
* This is probably the last attempt in the `sysinstall' line, the next
* generation being slated to essentially a complete rewrite.
*
* $FreeBSD$
*
* Copyright (c) 1995
* Jordan Hubbard. All rights reserved.
* Copyright (c) 1995
* Gary J Palmer. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR THEIR PETS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "sysinstall.h"
#include <ctype.h>
#include <sys/errno.h>
int
attr_parse_file(Attribs *attr, char *file)
{
int status;
FILE *fp;
if ((fp = fopen(file, "r")) == NULL) {
msgConfirm("Cannot open the information file `%s': %s (%d)", file, strerror(errno), errno);
return DITEM_FAILURE;
}
status = attr_parse(attr, fp);
fclose(fp);
return status;
}
int
attr_parse(Attribs *attr, FILE *fp)
{
char hold_n[MAX_NAME+1];
char hold_v[MAX_VALUE+1];
int n, v;
enum { LOOK, COMMENT, NAME, VALUE, COMMIT } state;
int lno, num_attribs;
int ch;
n = v = lno = num_attribs = 0;
state = LOOK;
while (state == COMMIT || (fread(&ch, 1, 1, fp) == 1)) {
/* Count lines */
if (ch == '\n')
++lno;
switch(state) {
case LOOK:
if (isspace(ch))
continue;
/* Allow shell or lisp style comments */
else if (ch == '#' || ch == ';') {
state = COMMENT;
continue;
}
else if (isalpha(ch) || ch == '_') {
hold_n[n++] = ch;
state = NAME;
}
else {
msgDebug("Parse config: Invalid character '%c' at line %d", ch, lno);
state = COMMENT; /* Ignore the rest of the line */
}
break;
case COMMENT:
if (ch == '\n')
state = LOOK;
break;
case NAME:
if (ch == '\n') {
hold_n[n] = '\0';
hold_v[v = 0] = '\0';
state = COMMIT;
}
else if (isspace(ch))
continue;
else if (ch == '=') {
hold_n[n] = '\0';
state = VALUE;
}
else
hold_n[n++] = ch;
break;
case VALUE:
if (v == 0 && isspace(ch))
continue;
else if (ch == '{') {
/* multiline value */
while (fread(&ch, 1, 1, fp) == 1 && ch != '}') {
if (v == MAX_VALUE)
msgFatal("Value length overflow at line %d", lno);
hold_v[v++] = ch;
}
hold_v[v] = '\0';
state = COMMIT;
}
else if (ch == '\n') {
hold_v[v] = '\0';
state = COMMIT;
}
else {
if (v == MAX_VALUE)
msgFatal("Value length overflow at line %d", lno);
else
hold_v[v++] = ch;
}
break;
case COMMIT:
SAFE_STRCPY(attr[num_attribs].name, hold_n);
SAFE_STRCPY(attr[num_attribs].value, hold_v);
state = LOOK;
v = n = 0;
if (++num_attribs >= MAX_ATTRIBS)
msgFatal("Attribute limit overflow; encountered a bad attributes file!");
break;
default:
msgFatal("Unknown state at line %d??", lno);
}
}
attr[num_attribs].name[0] = NULL; /* end marker */
attr[num_attribs].value[0] = NULL; /* end marker */
if (isDebug())
msgDebug("Finished parsing %d attributes.\n", num_attribs);
return DITEM_SUCCESS;
}
char *
attr_match(Attribs *attr, char *name)
{
int n;
if (isDebug())
msgDebug("Trying to match attribute `%s'\n", name);
for (n = 0; attr[n].name[0] && strcasecmp(attr[n].name, name) != 0; n++) {
if (isDebug())
msgDebug("Skipping attribute %u\n", n);
}
if (isDebug())
msgDebug("Stopped on attribute %u\n", n);
if (attr[n].name[0]) {
if (isDebug())
msgDebug("Returning `%s'\n", attr[n].value);
return(attr[n].value);
}
return NULL;
}
|
