+/******************************************************************************
+ * ventoy_browser.c
+ *
+ * Copyright (c) 2022, longpanda <admin@ventoy.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/disk.h>
+#include <grub/device.h>
+#include <grub/term.h>
+#include <grub/partition.h>
+#include <grub/file.h>
+#include <grub/normal.h>
+#include <grub/extcmd.h>
+#include <grub/datetime.h>
+#include <grub/i18n.h>
+#include <grub/net.h>
+#include <grub/time.h>
+#include <grub/ventoy.h>
+#include "ventoy_def.h"
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define BROWSER_MENU_BUF 65536
+
+static grub_fs_t g_menu_fs = NULL;
+static char *g_menu_device = NULL;
+static char g_menu_path_buf[1024];
+static int g_menu_path_len = 0;
+static browser_node *g_browser_list = NULL;
+
+static int ventoy_browser_strcmp(char *str1, char *str2)
+{
+ char *s1, *s2;
+ int c1 = 0;
+ int c2 = 0;
+
+ for (s1 = str1, s2 = str2; *s1 && *s2; s1++, s2++)
+ {
+ c1 = *s1;
+ c2 = *s2;
+
+ if (0 == g_sort_case_sensitive)
+ {
+ if (grub_islower(c1))
+ {
+ c1 = c1 - 'a' + 'A';
+ }
+
+ if (grub_islower(c2))
+ {
+ c2 = c2 - 'a' + 'A';
+ }
+ }
+
+ if (c1 != c2)
+ {
+ break;
+ }
+ }
+
+ return (c1 - c2);
+}
+
+static int ventoy_browser_mbuf_alloc(browser_mbuf *mbuf)
+{
+ grub_memset(mbuf, 0, sizeof(browser_mbuf));
+ mbuf->buf = grub_malloc(BROWSER_MENU_BUF);
+ if (!mbuf->buf)
+ {
+ return 0;
+ }
+
+ mbuf->pos = 0;
+ mbuf->max = BROWSER_MENU_BUF;
+ return 1;
+}
+
+static void ventoy_browser_mbuf_free(browser_mbuf *mbuf)
+{
+ if (mbuf)
+ grub_check_free(mbuf->buf)
+}
+
+static int ventoy_browser_mbuf_extend(browser_mbuf *mbuf)
+{
+ if (mbuf->max - mbuf->pos <= VTOY_SIZE_1KB)
+ {
+ mbuf->max += BROWSER_MENU_BUF;
+ mbuf->buf = grub_realloc(mbuf->buf, mbuf->max);
+ }
+
+ return 0;
+}
+
+static browser_node * ventoy_browser_find_top_node(int dir)
+{
+ browser_node *node = NULL;
+ browser_node *sel = NULL;
+
+ for (node = g_browser_list; node; node = node->next)
+ {
+ if (node->dir == dir)
+ {
+ if (sel)
+ {
+ if (ventoy_browser_strcmp(sel->filename, node->filename) > 0)
+ {
+ sel = node;
+ }
+ }
+ else
+ {
+ sel = node;
+ }
+ }
+ }
+
+ return sel;
+}
+
+static int ventoy_browser_check_filename(const char *filename, int len, int *type)
+{
+ if (len < 4)
+ {
+ return 0;
+ }
+
+ if (FILE_FLT(ISO) && 0 == grub_strcasecmp(filename + len - 4, ".iso"))
+ {
+ *type = img_type_iso;
+ }
+ else if (FILE_FLT(WIM) && g_wimboot_enable && (0 == grub_strcasecmp(filename + len - 4, ".wim")))
+ {
+ *type = img_type_wim;
+ }
+ else if (FILE_FLT(VHD) && g_vhdboot_enable && (0 == grub_strcasecmp(filename + len - 4, ".vhd") ||
+ (len >= 5 && 0 == grub_strcasecmp(filename + len - 5, ".vhdx"))))
+ {
+ *type = img_type_vhd;
+ }
+ #ifdef GRUB_MACHINE_EFI
+ else if (FILE_FLT(EFI) && 0 == grub_strcasecmp(filename + len - 4, ".efi"))
+ {
+ *type = img_type_efi;
+ }
+ #endif
+ else if (FILE_FLT(IMG) && 0 == grub_strcasecmp(filename + len - 4, ".img"))
+ {
+ if (len == 18 && grub_strncmp(filename, "ventoy_", 7) == 0)
+ {
+ if (grub_strncmp(filename + 7, "wimboot", 7) == 0 ||
+ grub_strncmp(filename + 7, "vhdboot", 7) == 0)
+ {
+ return 0;
+ }
+ }
+ *type = img_type_img;
+ }
+ else if (FILE_FLT(VTOY) && len >= 5 && 0 == grub_strcasecmp(filename + len - 5, ".vtoy"))
+ {
+ *type = img_type_vtoy;
+ }
+ else
+ {
+ return 0;
+ }
+
+ if (g_filt_dot_underscore_file && filename[0] == '.' && filename[1] == '_')
+ {
+ return 0;
+ }
+
+ return 1;
+}
+
+
+static int ventoy_browser_iterate_partition(struct grub_disk *disk, const grub_partition_t partition, void *data)
+{
+ char partname[64];
+ char title[256];
+ grub_device_t dev;
+ grub_fs_t fs;
+ char *Label = NULL;
+ browser_mbuf *mbuf = (browser_mbuf *)data;
+
+ (void)data;
+
+ grub_snprintf(partname, sizeof(partname) - 1, "%s,%d", disk->name, partition->number + 1);
+
+ dev = grub_device_open(partname);
+ if (!dev)
+ {
+ return 0;
+ }
+
+ fs = grub_fs_probe(dev);
+ if (!fs)
+ {
+ grub_device_close(dev);
+ return 0;
+ }
+
+ fs->fs_label(dev, &Label);
+
+ grub_snprintf(title, sizeof(title), "%-10s (%s,%s%d) [%s] %s %s",
+ "DISK", disk->name, partition->msdostype == 0xee ? "gpt" : "msdos",
+ partition->number + 1, (Label ? Label : ""), fs->name,
+ grub_get_human_size(partition->len << disk->log_sector_size, GRUB_HUMAN_SIZE_SHORT));
+
+ if (ventoy_get_fs_type(fs->name) >= ventoy_fs_max)
+ {
+ browser_ssprintf(mbuf, "menuentry \"%s\" --class=vtoydisk {\n"
+ " echo \"unsupported file system type!\" \n"
+ " ventoy_pause\n"
+ "}\n",
+ title);
+ }
+ else
+ {
+ browser_ssprintf(mbuf, "menuentry \"%s\" --class=vtoydisk {\n"
+ " vt_browser_dir %s,%d 0x%lx /\n"
+ "}\n",
+ title, disk->name, partition->number + 1, (ulong)fs);
+ }
+
+ ventoy_browser_mbuf_extend(mbuf);
+
+ return 0;
+}
+
+
+static int ventoy_browser_iterate_disk(const char *name, void *data)
+{
+ grub_disk_t disk;
+ grub_uint32_t sig;
+ grub_uint32_t selfsig;
+
+ grub_memcpy(&selfsig, g_ventoy_part_info->MBR.BootCode + 0x1b8, 4);
+
+ if (name[0] != 'h')
+ {
+ return 0;
+ }
+
+ disk = grub_disk_open(name);
+ if (disk)
+ {
+ grub_disk_read(disk, 0, 0x1b8, 4, &sig);
+
+ /* skip ventoy device self */
+ if (sig != selfsig)
+ {
+ grub_partition_iterate(disk, ventoy_browser_iterate_partition, data);
+ }
+
+ grub_disk_close(disk);
+ }
+
+ return 0;
+}
+
+static int ventoy_browser_iterate_dir(const char *filename, const struct grub_dirhook_info *info, void *data)
+{
+ int type;
+ int len;
+ browser_node *node;
+
+ (void)data;
+
+ len = grub_strlen(filename);
+
+ if (info->dir)
+ {
+ if ((len == 1 && filename[0] == '.') ||
+ (len == 2 && filename[0] == '.' && filename[1] == '.'))
+ {
+ return 0;
+ }
+
+ if (!ventoy_img_name_valid(filename, len))
+ {
+ return 0;
+ }
+
+ if (filename[0] == '$')
+ {
+ if (0 == grub_strncmp(filename, "$RECYCLE.BIN", 12) ||
+ 0 == grub_strncasecmp(filename, "$Extend", 7))
+ {
+ return 0;
+ }
+ }
+
+ node = grub_zalloc(sizeof(browser_node));
+ if (!node)
+ {
+ return 0;
+ }
+
+ node->dir = 1;
+ grub_strncpy(node->filename, filename, sizeof(node->filename));
+ grub_snprintf(node->menuentry, sizeof(node->menuentry),
+ "menuentry \"%-10s [%s]\" --class=vtoydir {\n"
+ " vt_browser_dir %s 0x%lx \"%s/%s\"\n"
+ "}\n",
+ "DIR", filename, g_menu_device, (ulong)g_menu_fs, g_menu_path_buf, filename);
+ }
+ else
+ {
+ grub_uint64_t fsize;
+ grub_file_t file = NULL;
+
+ if (ventoy_browser_check_filename(filename, len, &type) == 0)
+ {
+ return 0;
+ }
+
+ fsize = info->size;
+ if (fsize == 0)
+ {
+ file = ventoy_grub_file_open(VENTOY_FILE_TYPE, "(%s)%s/%s", g_menu_device, g_menu_path_buf, filename);
+ if (!file)
+ {
+ return 0;
+ }
+
+ fsize = file->size;
+ grub_file_close(file);
+ }
+
+ if (fsize < VTOY_FILT_MIN_FILE_SIZE)
+ {
+ return 0;
+ }
+
+ node = grub_zalloc(sizeof(browser_node));
+ if (!node)
+ {
+ return 0;
+ }
+
+ node->dir = 0;
+ grub_strncpy(node->filename, filename, sizeof(node->filename));
+ grub_snprintf(node->menuentry, sizeof(node->menuentry),
+ "menuentry \"%-10s %s\" --class=%s {\n"
+ " vt_set_fake_vlnk \"(%s)%s/%s\" %s %llu\n"
+ " %s_common_menuentry\n"
+ " vt_reset_fake_vlnk\n"
+ "}\n",
+ grub_get_human_size(fsize, GRUB_HUMAN_SIZE_SHORT), filename, g_menu_class[type],
+ g_menu_device, g_menu_path_buf, filename, g_menu_prefix[type], (ulonglong)fsize,
+ g_menu_prefix[type]);
+
+ }
+
+ node->prev = NULL;
+ node->next = g_browser_list;
+ if (g_browser_list)
+ {
+ g_browser_list->prev = node;
+ }
+ g_browser_list = node;
+
+ return 0;
+}
+
+grub_err_t ventoy_cmd_browser_dir(grub_extcmd_context_t ctxt, int argc, char **args)
+{
+ int i;
+ grub_fs_t fs;
+ grub_device_t dev;
+ char cfgfile[64];
+ browser_node *node;
+ browser_mbuf mbuf;
+
+ (void)ctxt;
+ (void)argc;
+
+ if (!ventoy_browser_mbuf_alloc(&mbuf))
+ {
+ return 1;
+ }
+
+ fs = (grub_fs_t)grub_strtoul(args[1], NULL, 16);
+ if (!fs)
+ {
+ debug("Invalid fs %s\n", args[1]);
+ return 1;
+ }
+
+ dev = grub_device_open(args[0]);
+ if (!dev)
+ {
+ debug("Failed to open device %s\n", args[0]);
+ return 1;
+ }
+
+ g_menu_fs = fs;
+ g_menu_device = args[0];
+ g_browser_list = NULL;
+
+ if (args[2][0] == '/' && args[2][1] == 0)
+ {
+ g_menu_path_len = 0;
+ g_menu_path_buf[0] = 0;
+ fs->fs_dir(dev, "/", ventoy_browser_iterate_dir, NULL);
+ }
+ else
+ {
+ g_menu_path_len = grub_snprintf(g_menu_path_buf, sizeof(g_menu_path_buf), "%s", args[2]);
+ fs->fs_dir(dev, g_menu_path_buf, ventoy_browser_iterate_dir, NULL);
+ }
+ grub_device_close(dev);
+
+ browser_ssprintf(&mbuf, "menuentry \"%-10s [../]\" --class=\"vtoyret\" VTOY_RET {\n "
+ " echo 'return ...' \n}\n", "<--");
+
+ for (i = 1; i >= 0; i--)
+ {
+ while (1)
+ {
+ node = ventoy_browser_find_top_node(i);
+ if (node)
+ {
+ grub_printf("Find Node <%s>\n", node->filename);
+ browser_ssprintf(&mbuf, "%s", node->menuentry);
+ if (node->prev)
+ {
+ node->prev->next = node->next;
+ }
+ if (node->next)
+ {
+ node->next->prev = node->prev;
+ }
+
+ if (node == g_browser_list)
+ {
+ g_browser_list = node->next;
+ }
+ grub_free(node);
+ }
+ else
+ {
+ break;
+ }
+ }
+ }
+ g_browser_list = NULL;
+
+ grub_snprintf(cfgfile, sizeof(cfgfile), "configfile mem:0x%lx:size:%d", (ulong)mbuf.buf, mbuf.pos);
+ grub_script_execute_sourcecode(cfgfile);
+
+ ventoy_browser_mbuf_free(&mbuf);
+ VENTOY_CMD_RETURN(GRUB_ERR_NONE);
+}
+
+grub_err_t ventoy_cmd_browser_disk(grub_extcmd_context_t ctxt, int argc, char **args)
+{
+ char cfgfile[64];
+ browser_mbuf mbuf;
+
+ (void)ctxt;
+ (void)argc;
+ (void)args;
+
+ if (!ventoy_browser_mbuf_alloc(&mbuf))
+ {
+ return 1;
+ }
+
+ browser_ssprintf(&mbuf, "menuentry \"%-10s [Return]\" --class=\"vtoyret\" VTOY_RET {\n "
+ " echo 'return ...' \n}\n", "<--");
+
+ grub_disk_dev_iterate(ventoy_browser_iterate_disk, &mbuf);
+
+ grub_snprintf(cfgfile, sizeof(cfgfile), "configfile mem:0x%lx:size:%d", (ulong)mbuf.buf, mbuf.pos);
+ grub_script_execute_sourcecode(cfgfile);
+
+ ventoy_browser_mbuf_free(&mbuf);
+ VENTOY_CMD_RETURN(GRUB_ERR_NONE);
+}
+
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