#include "parser.h"
#include "parser-utils.h"
#include "paths.h"
+#include "file.h"
struct p_item {
struct list_item list;
STATIC_LIST(parsers);
-static const int max_file_size = 1024 * 1024;
+static char *local_path(struct discover_context *ctx,
+ struct discover_device *dev,
+ const char *filename)
+{
+ return join_paths(ctx, dev->mount_path, filename);
+}
+
+int parser_request_file(struct discover_context *ctx,
+ struct discover_device *dev, const char *filename,
+ char **buf, int *len)
-static int read_file(struct discover_context *ctx,
- const char *filename, char **bufp, int *lenp)
{
- struct stat statbuf;
- int rc, fd, i, len;
- char *buf;
+ char *path;
+ int rc;
- fd = open(filename, O_RDONLY);
- if (fd < 0)
+ /* we only support local files at present */
+ if (!dev->mount_path)
return -1;
- rc = fstat(fd, &statbuf);
- if (rc < 0)
- goto err_close;
+ path = local_path(ctx, dev, filename);
- len = statbuf.st_size;
- if (len > max_file_size)
- goto err_close;
+ rc = read_file(ctx, path, buf, len);
- buf = talloc_array(ctx, char, len + 1);
- if (!buf)
- goto err_close;
+ talloc_free(path);
- for (i = 0; i < len; i += rc) {
- rc = read(fd, buf + i, len - i);
+ return rc;
+}
- /* unexpected EOF: trim and return */
- if (rc == 0) {
- len = i;
- break;
- }
+int parser_replace_file(struct discover_context *ctx,
+ struct discover_device *dev, const char *filename,
+ char *buf, int len)
+{
+ bool release;
+ char *path;
+ int rc;
- if (rc < 0)
- goto err_free;
+ if (!dev->mounted)
+ return -1;
+ rc = device_request_write(dev, &release);
+ if (rc) {
+ pb_log("Can't write file %s: device doesn't allow write\n",
+ dev->device_path);
+ return -1;
}
- buf[len] = '\0';
+ path = local_path(ctx, dev, filename);
- close(fd);
- *bufp = buf;
- *lenp = len;
- return 0;
+ rc = replace_file(path, buf, len);
-err_free:
- talloc_free(buf);
-err_close:
- close(fd);
- return -1;
-}
+ talloc_free(path);
-static char *local_path(struct discover_context *ctx,
- const char *filename)
-{
- return join_paths(ctx, ctx->device->mount_path, filename);
+ device_release_write(dev, release);
+
+ return rc;
}
-static int download_config(struct discover_context *ctx, char **buf, int *len)
+int parser_request_url(struct discover_context *ctx, struct pb_url *url,
+ char **buf, int *len)
{
- unsigned tempfile;
- const char *file;
+ struct load_url_result *result;
int rc;
- file = load_url(ctx, ctx->conf_url, &tempfile);
- if (!file)
- return -1;
+ result = load_url(ctx, url);
+ if (!result)
+ goto out;
- rc = read_file(ctx, file, buf, len);
- if (rc)
+ rc = read_file(ctx, result->local, buf, len);
+ if (rc) {
+ pb_log("Read failed for the parser %s on file %s\n",
+ ctx->parser->name, result->local);
goto out_clean;
+ }
return 0;
out_clean:
- if (tempfile)
- unlink(file);
+ if (result->cleanup_local)
+ unlink(result->local);
+out:
return -1;
}
-static void iterate_parser_files(struct discover_context *ctx,
- const struct parser *parser)
-{
- const char * const *filename;
- const char *path;
-
- if (!parser->filenames)
- return;
-
- for (filename = parser->filenames; *filename; filename++) {
- int rc, len;
- char *buf;
-
- path = local_path(ctx, *filename);
- if (!path)
- continue;
-
- rc = read_file(ctx, path, &buf, &len);
- if (!rc) {
- pb_log("Running parser %s on file %s\n",
- parser->name, *filename);
- parser->parse(ctx, buf, len);
- talloc_free(buf);
- }
- }
-}
-
-void iterate_parsers(struct discover_context *ctx, enum conf_method method)
+void iterate_parsers(struct discover_context *ctx)
{
struct p_item* i;
- int rc, len;
- char *buf;
pb_log("trying parsers for %s\n", ctx->device->device->id);
- switch (method) {
- case CONF_METHOD_LOCAL_FILE:
- list_for_each_entry(&parsers, i, list) {
- if (i->parser->method != CONF_METHOD_LOCAL_FILE)
- continue;
-
- pb_log("\ttrying parser '%s'\n", i->parser->name);
- ctx->parser = i->parser;
- iterate_parser_files(ctx, ctx->parser);
- }
- ctx->parser = NULL;
- break;
-
- case CONF_METHOD_DHCP:
- rc = download_config(ctx, &buf, &len);
- if (rc) {
- pb_log("\tdownload failed, aborting\n");
- return;
- }
-
- list_for_each_entry(&parsers, i, list) {
- if (i->parser->method != method)
- continue;
-
- pb_log("\ttrying parser '%s'\n", i->parser->name);
- ctx->parser = i->parser;
- i->parser->parse(ctx, buf, len);
- }
-
- break;
-
- case CONF_METHOD_UNKNOWN:
- break;
-
+ list_for_each_entry(&parsers, i, list) {
+ pb_debug("\ttrying parser '%s'\n", i->parser->name);
+ ctx->parser = i->parser;
+ i->parser->parse(ctx);
}
+ ctx->parser = NULL;
}
+static void *parsers_ctx;
+
void __register_parser(struct parser *parser)
{
- struct p_item* i = talloc(NULL, struct p_item);
+ struct p_item *i;
+ if (!parsers_ctx)
+ parsers_ctx = talloc_new(NULL);
+
+ i = talloc(parsers_ctx, struct p_item);
i->parser = parser;
list_add(&parsers, &i->list);
}
+static __attribute__((destructor)) void cleanup_parsers(void)
+{
+ talloc_free(parsers_ctx);
+}
+
void parser_init(void)
{
}
projects / petitboot / blobdiff