3 * Simple property list handling code.
6 * Jordan Hubbard. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer,
13 * verbatim and that no modifications are made prior to this
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.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR HIS PETS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: head/lib/libutil/property.c 152886 2005-11-28 16:30:16Z jhb $
34 #include <sys/types.h>
44 property_alloc(char *name, char *value)
48 if ((n = (properties)malloc(sizeof(struct _property))) == NULL)
52 if ((n->name = strdup(name)) == NULL) {
59 if ((n->value = strdup(value)) == NULL) {
70 properties_read(int fd)
73 char hold_n[PROPERTY_MAX_NAME + 1];
74 char hold_v[PROPERTY_MAX_VALUE + 1];
77 enum { LOOK, COMMENT, NAME, VALUE, MVALUE, COMMIT, FILL, STOP } state, last_state;
78 int ch = 0, blevel = 0;
82 state = last_state = LOOK;
83 while (state != STOP) {
84 if (state != COMMIT) {
93 if ((max = read(fd, buf, sizeof buf)) < 0) {
94 properties_free(head);
101 * Restore the state from before the fill (which will be
102 * initialised to LOOK for the first FILL). This ensures that
103 * if we were part-way through eg., a VALUE state, when the
104 * buffer ran out, that the previous operation will be allowed
114 if (isspace((unsigned char)ch))
116 /* Allow shell or lisp style comments */
117 else if (ch == '#' || ch == ';') {
121 else if (isalnum((unsigned char)ch) || ch == '_') {
122 if (n >= PROPERTY_MAX_NAME) {
132 state = COMMENT; /* Ignore the rest of the line */
141 if (ch == '\n' || !ch) {
147 else if (isspace((unsigned char)ch))
149 else if (ch == '=') {
159 if (v == 0 && ch == '\n') {
164 else if (v == 0 && isspace((unsigned char)ch))
166 else if (ch == '{') {
170 else if (ch == '\n' || !ch) {
176 if (v >= PROPERTY_MAX_VALUE) {
187 /* multiline value */
188 if (v >= PROPERTY_MAX_VALUE) {
189 warn("properties_read: value exceeds max length");
193 else if (ch == '}' && !--blevel) {
207 if ((head = ptr = property_alloc(hold_n, hold_v)) == NULL)
210 if ((ptr->next = property_alloc(hold_n, hold_v)) == NULL) {
211 properties_free(head);
221 /* we don't handle this here, but this prevents warnings */
225 if (head == NULL && (head = property_alloc(NULL, NULL)) == NULL)
232 property_find(properties list, const char *name)
234 if (list == NULL || name == NULL || !name[0])
236 while (list != NULL) {
237 if (list->name != NULL && strcmp(list->name, name) == 0)
238 return (list->value);
245 properties_free(properties list)