discover: Add configuration methods

[petitboot] / discover / parser.c

diff --git a/discover/parser.c b/discover/parser.c
index 5e50dcbdafc292f8c05a29f986f1d5510259938b..c04a0afca610b31bfb07468824770445cfc94d92 100644 (file)
--- a/discover/parser.c
+++ b/discover/parser.c
@@ -1,85 +1,129 @@
 
-#include <petitboot-paths.h>
+#include <fcntl.h>
 #include <stdlib.h>
-#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 
+#include "types/types.h"
+#include <log/log.h>
+#include <talloc/talloc.h>
+
+#include "device-handler.h"
 #include "parser.h"
+#include "parser-utils.h"
+#include "paths.h"
 
-extern struct parser native_parser;
-extern struct parser yaboot_parser;
-extern struct parser kboot_parser;
+static int n_parsers;
+static struct parser **parsers;
 
-/* array of parsers, ordered by priority */
-static struct parser *parsers[] = {
-       &native_parser,
-       &yaboot_parser,
-       &kboot_parser,
-       NULL
-};
+static const int max_file_size = 1024 * 1024;
 
-void iterate_parsers(const char *devpath, const char *mountpoint)
+static int read_file(struct discover_context *ctx,
+               const char *filename, char **bufp, int *lenp)
 {
-       int i;
+       struct stat statbuf;
+       int rc, fd, i, len;
+       char *buf;
+
+       fd = open(filename, O_RDONLY);
+       if (fd < 0)
+               return -1;
+
+       rc = fstat(fd, &statbuf);
+       if (rc < 0)
+               goto err_close;
+
+       len = statbuf.st_size;
+       if (len > max_file_size)
+               goto err_close;
+
+       buf = talloc_array(ctx, char, len);
+       if (!buf)
+               goto err_close;
+
+       for (i = 0; i < len; i += rc) {
+               rc = read(fd, buf + i, len - i);
 
-       pb_log("trying parsers for %s\n", devpath);
+               /* unexpected EOF: trim and return */
+               if (rc == 0) {
+                       len = i;
+                       break;
+               }
+
+               if (rc < 0)
+                       goto err_free;
 
-       for (i = 0; parsers[i]; i++) {
-               pb_log("\ttrying parser '%s'\n", parsers[i]->name);
-               /* just use a dummy device path for now */
-               if (parsers[i]->parse(devpath))
-                       return;
        }
-       pb_log("\tno boot_options found\n");
+
+       close(fd);
+       *bufp = buf;
+       *lenp = len;
+       return 0;
+
+err_free:
+       talloc_free(buf);
+err_close:
+       close(fd);
+       return -1;
 }
 
-/* convenience functions for parsers */
-void free_device(struct device *dev)
+static char *local_path(struct discover_context *ctx,
+               const char *filename)
 {
-       if (!dev)
-               return;
-       if (dev->id)
-               free(dev->id);
-       if (dev->name)
-               free(dev->name);
-       if (dev->description)
-               free(dev->description);
-       if (dev->icon_file)
-               free(dev->icon_file);
-       free(dev);
+       return join_paths(ctx, ctx->device->mount_path, filename);
 }
 
-void free_boot_option(struct boot_option *opt)
+static void iterate_parser_files(struct discover_context *ctx,
+               const struct parser *parser)
 {
-       if (!opt)
+       const char * const *filename;
+       const char *path;
+
+       if (!parser->filenames)
                return;
-       if (opt->name)
-               free(opt->name);
-       if (opt->description)
-               free(opt->description);
-       if (opt->icon_file)
-               free(opt->icon_file);
-       if (opt->boot_image_file)
-               free(opt->boot_image_file);
-       if (opt->initrd_file)
-               free(opt->initrd_file);
-       if (opt->boot_args)
-               free(opt->boot_args);
-       free(opt);
+
+       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) {
+                       parser->parse(ctx, buf, len);
+                       talloc_free(buf);
+               }
+       }
 }
 
-const char *generic_icon_file(enum generic_icon_type type)
+void iterate_parsers(struct discover_context *ctx, enum conf_method method)
 {
-       switch (type) {
-       case ICON_TYPE_DISK:
-               return artwork_pathname("hdd.png");
-       case ICON_TYPE_USB:
-               return artwork_pathname("usbpen.png");
-       case ICON_TYPE_OPTICAL:
-               return artwork_pathname("cdrom.png");
-       case ICON_TYPE_NETWORK:
-       case ICON_TYPE_UNKNOWN:
-               break;
+       int i;
+
+       pb_log("trying parsers for %s\n", ctx->device->device->id);
+
+       if (method == CONF_METHOD_LOCAL_FILE) {
+               for (i = 0; i < n_parsers; i++) {
+                       if (parsers[i]->method != CONF_METHOD_LOCAL_FILE)
+                               continue;
+
+                       pb_log("\ttrying parser '%s'\n", parsers[i]->name);
+                       ctx->parser = parsers[i];
+                       iterate_parser_files(ctx, ctx->parser);
+               }
+               ctx->parser = NULL;
        }
-       return artwork_pathname("hdd.png");
 }
 
+void __register_parser(struct parser *parser)
+{
+       parsers = talloc_realloc(NULL, parsers, struct parser *, n_parsers + 1);
+       parsers[n_parsers] = parser;
+       n_parsers++;
+}
+
+void parser_init(void)
+{
+}