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
184
185
186
187
188
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Copyright 2021 OmniOS Community Edition (OmniOSce) Association.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <definit.h>
/* Tokens are separated by spaces, tabs and newlines. */
#define SEPARATORS " \t\n"
typedef struct definit {
FILE *di_fp;
char *di_line;
char *di_tok;
} definit_t;
int
definit_open(const char *file, void **statep)
{
FILE *fp;
int _errno;
definit_t *state = NULL;
if ((fp = fopen(file, "r")) == NULL)
return (-1);
if ((state = calloc(1, sizeof (*state))) == NULL)
goto err;
if ((state->di_line = calloc(DEFINIT_MAXLINE, sizeof (char))) == NULL)
goto err;
state->di_fp = fp;
*statep = state;
return (0);
err:
_errno = errno;
(void) fclose(fp);
if (state != NULL) {
free(state->di_line);
free(state);
}
errno = _errno;
return (-1);
}
void
definit_close(void *statep)
{
definit_t *state = statep;
(void) fclose(state->di_fp);
free(state->di_line);
free(state);
}
/*
* This parser was written to produce the same output as the ones it replaced
* in init and svc.startd. As such it has some shortcomings:
* - Values may be quoted but the quotes are just stripped and separators such
* as whitespace are not treated specially within quotes;
* - Lines which are longer than DEFINIT_MAXLINE -1 bytes are split. Tokens
* which span a split will be truncated, one way or another.
* - Comments at the end of a line (after a token) are not supported.
* These could be corrected in the future if strict backwards compatibility is
* not required.
*/
static char *
definit_nextline(definit_t *state)
{
char *line;
while ((line = fgets(state->di_line, DEFINIT_MAXLINE, state->di_fp))
!= NULL) {
boolean_t inquotes;
char *p, *bp;
size_t wslength;
/*
* Ignore blank or comment lines.
*/
if (line[0] == '#' || line[0] == '\0' ||
(wslength = strspn(line, SEPARATORS)) == strlen(line) ||
line[wslength] == '#') {
continue;
}
/*
* Make a pass through the line and:
* - Replace any non-quoted semicolons with spaces;
* - Remove any quote characters.
*
* While walking this, 'p' is the current position in the line
* and, if any characters have been found which need to be
* removed, 'bp' tracks the position in the line where
* subsequent characters need to be written in order to close
* the gap; 'bp' trails 'p'.
* If 'bp' is NULL, no characters to remove have been found.
*/
inquotes = B_FALSE;
for (p = line, bp = NULL; *p != '\0'; p++) {
switch (*p) {
case '"':
case '\'':
inquotes = !inquotes;
if (bp == NULL)
bp = p;
break;
case ';':
if (!inquotes)
*p = ' ';
/* FALLTHROUGH */
default:
if (bp != NULL)
*bp++ = *p;
break;
}
}
if (bp != NULL)
*bp = '\0';
/*
* Perform an initial strtok_r() call on the new line.
* definit_token() will repeatedly call strtok_r() until the
* line is consumed, and then call this function again for
* more input.
*/
if ((p = strtok_r(line, SEPARATORS, &state->di_tok)) != NULL)
return (p);
}
return (NULL);
}
const char *
definit_token(void *statep)
{
definit_t *state = statep;
char *tok;
for (;;) {
tok = NULL;
if (state->di_tok != NULL)
tok = strtok_r(NULL, SEPARATORS, &state->di_tok);
if (tok == NULL)
tok = definit_nextline(state);
if (tok == NULL)
break;
if (strchr(tok, '=') != NULL && *tok != '=')
return (tok);
}
return (NULL);
}
|
