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bus: add basic dbus1 policy parser

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Enforcement is still missing, but at least we can parse it now.
This commit is contained in:
Lennart Poettering
2014-06-06 19:41:24 +02:00
parent 827bf3c5dd
commit bcf3295d2b
7 changed files with 819 additions and 4 deletions
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src/shared/xml.c
+39 -1
View File
@@ -25,17 +25,37 @@
#include "xml.h"
enum {
STATE_NULL,
STATE_TEXT,
STATE_TAG,
STATE_ATTRIBUTE,
};
static void inc_lines(unsigned *line, const char *s, size_t n) {
const char *p = s;
if (!line)
return;
for (;;) {
const char *f;
f = memchr(p, '\n', n);
if (!f)
return;
n -= (f - p) + 1;
p = f + 1;
(*line)++;
}
}
/* We don't actually do real XML here. We only read a simplistic
* subset, that is a bit less strict that XML and lacks all the more
* complex features, like entities, or namespaces. However, we do
* support some HTML5-like simplifications */
int xml_tokenize(const char **p, char **name, void **state) {
int xml_tokenize(const char **p, char **name, void **state, unsigned *line) {
const char *c, *e, *b;
char *ret;
int t;
@@ -48,6 +68,12 @@ int xml_tokenize(const char **p, char **name, void **state) {
t = PTR_TO_INT(*state);
c = *p;
if (t == STATE_NULL) {
if (line)
*line = 1;
t = STATE_TEXT;
}
for (;;) {
if (*c == 0)
return XML_END;
@@ -64,6 +90,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (!ret)
return -ENOMEM;
inc_lines(line, c, e - c);
*name = ret;
*p = e;
*state = INT_TO_PTR(STATE_TEXT);
@@ -80,6 +108,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (!e)
return -EINVAL;
inc_lines(line, b, e + 3 - b);
c = e + 3;
continue;
}
@@ -91,6 +121,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (!e)
return -EINVAL;
inc_lines(line, b, e + 2 - b);
c = e + 2;
continue;
}
@@ -102,6 +134,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (!e)
return -EINVAL;
inc_lines(line, b, e + 1 - b);
c = e + 1;
continue;
}
@@ -134,6 +168,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (*b == 0)
return -EINVAL;
inc_lines(line, c, b - c);
e = b + strcspn(b, WHITESPACE "=/>");
if (e > b) {
/* An attribute */
@@ -178,6 +214,8 @@ int xml_tokenize(const char **p, char **name, void **state) {
if (!e)
return -EINVAL;
inc_lines(line, c, e - c);
ret = strndup(c+1, e - c - 1);
if (!ret)
return -ENOMEM;