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multirom.c
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#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/mount.h>
#include <sys/klog.h>
#include <linux/loop.h>
#include "multirom.h"
#include "multirom_ui.h"
#include "framebuffer.h"
#include "input.h"
#include "log.h"
#include "util.h"
#define REALDATA "/realdata"
#define BUSYBOX_BIN "busybox"
#define KEXEC_BIN "kexec"
#define NTFS_BIN "ntfs-3g"
#define INTERNAL_ROM_NAME "Internal"
#define BOOT_BLK "/dev/block/mmcblk0p2"
#define MAX_ROM_NAME_LEN 26
#define LAYOUT_VERSION "/data/.layout_version"
#define SECOND_BOOT_KMESG "MultiromSaysNextBootShouldBeSecondMagic108"
#define T_FOLDER 4
static char multirom_dir[64] = { 0 };
static char busybox_path[64] = { 0 };
static char kexec_path[64] = { 0 };
static char ntfs_path[64] = { 0 };
static volatile int run_usb_refresh = 0;
static pthread_t usb_refresh_thread;
static pthread_mutex_t parts_mutex = PTHREAD_MUTEX_INITIALIZER;
static void (*usb_refresh_handler)(void) = NULL;
int multirom_find_base_dir(void)
{
int i;
struct stat info;
static const char *paths[] = {
REALDATA"/media/0/multirom", // 4.2
REALDATA"/media/multirom",
NULL,
};
for(i = 0; paths[i]; ++i)
{
if(stat(paths[i], &info) < 0)
continue;
strcpy(multirom_dir, paths[i]);
sprintf(busybox_path, "%s/%s", paths[i], BUSYBOX_BIN);
sprintf(kexec_path, "%s/%s", paths[i], KEXEC_BIN);
sprintf(ntfs_path, "%s/%s", paths[i], NTFS_BIN);
chmod(kexec_path, 0777);
chmod(ntfs_path, 0777);
return 0;
}
return -1;
}
int multirom(void)
{
if(multirom_find_base_dir() == -1)
{
ERROR("Could not find multirom dir");
return -1;
}
struct multirom_status s;
memset(&s, 0, sizeof(struct multirom_status));
multirom_load_status(&s);
multirom_dump_status(&s);
struct multirom_rom *to_boot = NULL;
int exit = (EXIT_REBOOT | EXIT_UMOUNT);
if(s.is_second_boot == 0)
{
// just to cache the result so that it does not take
// any time when the UI is up
multirom_has_kexec();
switch(multirom_ui(&s, &to_boot))
{
case UI_EXIT_BOOT_ROM: break;
case UI_EXIT_REBOOT:
exit = (EXIT_REBOOT | EXIT_UMOUNT);
break;
case UI_EXIT_REBOOT_RECOVERY:
exit = (EXIT_REBOOT_RECOVERY | EXIT_UMOUNT);
break;
case UI_EXIT_REBOOT_BOOTLOADER:
exit = (EXIT_REBOOT_BOOTLOADER | EXIT_UMOUNT);
break;
case UI_EXIT_SHUTDOWN:
exit = (EXIT_SHUTDOWN | EXIT_UMOUNT);
break;
}
}
else
{
ERROR("Skipping ROM selection beacause of is_second_boot==1");
to_boot = s.current_rom;
}
if(to_boot)
{
exit = multirom_prepare_for_boot(&s, to_boot);
// Something went wrong, reboot
if(exit == -1)
{
multirom_emergency_reboot();
return EXIT_REBOOT;
}
s.current_rom = to_boot;
free(s.curr_rom_part);
s.curr_rom_part = NULL;
if(to_boot->partition)
s.curr_rom_part = strdup(to_boot->partition->uuid);
if(s.is_second_boot == 0 && (M(to_boot->type) & MASK_ANDROID) && (exit & EXIT_KEXEC))
s.is_second_boot = 1;
else
s.is_second_boot = 0;
}
multirom_save_status(&s);
multirom_free_status(&s);
sync();
return exit;
}
int multirom_init_fb(void)
{
vt_set_mode(1);
if(fb_open() < 0)
{
ERROR("Failed to open framebuffer!");
return -1;
}
fb_fill(BLACK);
return 0;
}
void multirom_emergency_reboot(void)
{
if(multirom_init_fb() < 0)
{
ERROR("Failed to init framebuffer in emergency reboot");
return;
}
char *klog = multirom_get_klog();
fb_add_text(0, 120, WHITE, SIZE_NORMAL,
"An error occured.\nShutting down MultiROM to avoid data corruption.\n"
"Report this error to the developer!\nDebug info: /sdcard/multirom/error.txt\n\n"
"Press POWER button to reboot.");
fb_add_text(0, 370, GRAYISH, SIZE_SMALL, "Last lines from klog:");
fb_add_rect(0, 390, fb_width, 1, GRAYISH);
char *tail = klog+strlen(klog);
int count = 0;
while(tail > klog && count < 50)
{
--tail;
if(*tail == '\n')
++count;
}
fb_add_text_long(0, 395, GRAYISH, SIZE_SMALL, ++tail);
fb_draw();
fb_clear();
fb_close();
multirom_copy_log(klog);
free(klog);
// Wait for power key
start_input_thread();
while(wait_for_key() != KEY_POWER);
stop_input_thread();
}
static int find_idx(int c)
{
static const char *capital = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
static const char *normal = "abcdefghijklmnopqrstuvwxyz";
char *p;
if((p = strchr(capital, c)))
return p - capital;
else if((p = strchr(normal, c)))
return p - normal;
return -c;
}
static int compare_rom_names(const void *a, const void *b)
{
struct multirom_rom *rom_a = *((struct multirom_rom **)a);
struct multirom_rom *rom_b = *((struct multirom_rom **)b);
if(strcmp(rom_a->name, INTERNAL_ROM_NAME) == 0)
return -1;
else if(strcmp(rom_b->name, INTERNAL_ROM_NAME) == 0)
return 1;
char *itr_a = rom_a->name;
char *itr_b = rom_b->name;
while(1)
{
if(*itr_a == 0)
return -1;
else if(*itr_b == 0)
return 1;
if(*itr_a == *itr_b)
{
++itr_a;
++itr_b;
continue;
}
int idx_a = find_idx(*itr_a);
int idx_b = find_idx(*itr_b);
if(idx_a == idx_b)
{
++itr_a;
++itr_b;
continue;
}
return idx_a < idx_b ? -1 : 1;
}
return 0;
}
int multirom_default_status(struct multirom_status *s)
{
s->is_second_boot = 0;
s->current_rom = NULL;
s->roms = NULL;
char roms_path[256];
sprintf(roms_path, "%s/roms/"INTERNAL_ROM_NAME, multirom_dir);
DIR *d = opendir(roms_path);
if(!d)
{
ERROR("Failed to open Internal ROM's folder, creating one with ROM from internal memory...\n");
if(multirom_import_internal() == -1)
return -1;
}
else
closedir(d);
sprintf(roms_path, "%s/roms", multirom_dir);
d = opendir(roms_path);
if(!d)
{
ERROR("Failed to open roms dir!\n");
return -1;
}
struct dirent *dr;
char path[256];
struct multirom_rom **add_roms = NULL;
while((dr = readdir(d)))
{
if(dr->d_name[0] == '.')
continue;
if(dr->d_type != T_FOLDER)
continue;
if(strlen(dr->d_name) > MAX_ROM_NAME_LEN)
{
ERROR("Skipping ROM %s, name is too long (max %d chars allowed)", dr->d_name, MAX_ROM_NAME_LEN);
continue;
}
fb_debug("Adding ROM %s\n", dr->d_name);
struct multirom_rom *rom = malloc(sizeof(struct multirom_rom));
memset(rom, 0, sizeof(struct multirom_rom));
rom->id = multirom_generate_rom_id();
rom->name = strdup(dr->d_name);
sprintf(path, "%s/%s", roms_path, rom->name);
rom->base_path = strdup(path);
rom->type = multirom_get_rom_type(rom);
sprintf(path, "%s/boot.img", rom->base_path, rom->name);
rom->has_bootimg = access(path, R_OK) == 0 ? 1 : 0;
list_add(rom, &add_roms);
}
closedir(d);
if(add_roms)
{
// sort roms
qsort(add_roms, list_item_count(add_roms), sizeof(struct multirom_rom*), compare_rom_names);
//add them to main list
int i;
for(i = 0; add_roms[i]; ++i)
list_add(add_roms[i], &s->roms);
list_clear(&add_roms, NULL);
}
s->current_rom = multirom_get_rom(s, INTERNAL_ROM_NAME, NULL);
if(!s->current_rom)
{
fb_debug("No internal rom found!\n");
return -1;
}
return 0;
}
int multirom_load_status(struct multirom_status *s)
{
fb_debug("Loading MultiROM status...\n");
multirom_default_status(s);
char arg[256];
sprintf(arg, "%s/multirom.ini", multirom_dir);
FILE *f = fopen(arg, "r");
if(!f)
{
fb_debug("Failed to open config file, using defaults!\n");
return -1;
}
char line[1024];
char current_rom[256] = { 0 };
char auto_boot_rom[256] = { 0 };
char name[64];
char *pch;
if(multirom_get_cmdline(line, sizeof(line)) != 0)
{
ERROR("Failed to get cmdline!\n");
return -1;
}
if(multirom_search_last_kmsg(SECOND_BOOT_KMESG) == 0)
s->is_second_boot = 1;
while((fgets(line, sizeof(line), f)))
{
pch = strtok (line, "=\n");
if(!pch) continue;
strcpy(name, pch);
pch = strtok (NULL, "=\n");
if(!pch) continue;
strcpy(arg, pch);
if(strstr(name, "current_rom"))
strcpy(current_rom, arg);
else if(strstr(name, "auto_boot_seconds"))
s->auto_boot_seconds = atoi(arg);
else if(strstr(name, "auto_boot_rom"))
strcpy(auto_boot_rom, arg);
else if(strstr(name, "curr_rom_part"))
s->curr_rom_part = strdup(arg);
}
fclose(f);
// find USB drive if we're booting from it
if(s->curr_rom_part && s->is_second_boot)
{
struct usb_partition *p = NULL;
int tries = 0;
while(!p && tries < 10)
{
multirom_update_partitions(s);
p = multirom_get_partition(s, s->curr_rom_part);
if(p)
{
multirom_scan_partition_for_roms(s, p);
break;
}
++tries;
ERROR("part %s not found, waiting 1s (%d)\n", s->curr_rom_part, tries);
sleep(1);
}
}
s->current_rom = multirom_get_rom(s, current_rom, s->curr_rom_part);
if(!s->current_rom)
{
fb_debug("Failed to select current rom (%s, part %s), using Internal!\n", current_rom, s->curr_rom_part);
s->current_rom = multirom_get_rom(s, INTERNAL_ROM_NAME, NULL);
if(!s->current_rom)
{
fb_debug("No internal rom found!\n");
return -1;
}
}
s->auto_boot_rom = multirom_get_rom(s, auto_boot_rom, NULL);
if(!s->auto_boot_rom)
ERROR("Could not find rom %s to auto-boot", auto_boot_rom);
return 0;
}
int multirom_save_status(struct multirom_status *s)
{
fb_debug("Saving multirom status\n");
char path[256];
sprintf(path, "%s/multirom.ini", multirom_dir);
FILE *f = fopen(path, "w");
if(!f)
{
fb_debug("Failed to open/create status file!\n");
return -1;
}
fprintf(f, "current_rom=%s\n", s->current_rom ? s->current_rom->name : INTERNAL_ROM_NAME);
fprintf(f, "auto_boot_seconds=%d\n", s->auto_boot_seconds);
fprintf(f, "auto_boot_rom=%s\n", s->auto_boot_rom ? s->auto_boot_rom->name : "");
fprintf(f, "curr_rom_part=%s\n", s->curr_rom_part ? s->curr_rom_part : "");
fclose(f);
return 0;
}
void multirom_find_usb_roms(struct multirom_status *s)
{
// remove USB roms
int i;
for(i = 0; s->roms && s->roms[i];)
{
if(M(s->roms[i]->type) & MASK_USB_ROMS)
{
list_rm(s->roms[i], &s->roms, &multirom_free_rom);
i = 0;
}
else ++i;
}
char path[256];
struct usb_partition *p;
pthread_mutex_lock(&parts_mutex);
for(i = 0; s->partitions && s->partitions[i]; ++i)
if(!strstr(s->partitions[i]->name, "mmcblk"))
multirom_scan_partition_for_roms(s, s->partitions[i]);
pthread_mutex_unlock(&parts_mutex);
}
int multirom_scan_partition_for_roms(struct multirom_status *s, struct usb_partition *p)
{
char path[256];
int i;
struct stat info;
struct dirent *dr;
struct multirom_rom **add_roms = NULL;
sprintf(path, "%s/multirom", p->mount_path);
if(stat(path, &info) < 0)
return -1;
DIR *d = opendir(path);
if(!d)
return -1;
while((dr = readdir(d)) != NULL)
{
if(dr->d_name[0] == '.')
continue;
struct multirom_rom *rom = malloc(sizeof(struct multirom_rom));
memset(rom, 0, sizeof(struct multirom_rom));
rom->id = multirom_generate_rom_id();
rom->name = strdup(dr->d_name);
sprintf(path, "%s/multirom/%s", p->mount_path, rom->name);
rom->base_path = strdup(path);
rom->partition = p;
rom->type = multirom_get_rom_type(rom);
sprintf(path, "%s/boot.img", rom->base_path);
rom->has_bootimg = access(path, R_OK) == 0 ? 1 : 0;
list_add(rom, &add_roms);
}
closedir(d);
if(add_roms)
{
// sort roms
qsort(add_roms, list_item_count(add_roms), sizeof(struct multirom_rom*), compare_rom_names);
//add them to main list
for(i = 0; add_roms[i]; ++i)
list_add(add_roms[i], &s->roms);
list_clear(&add_roms, NULL);
}
return 0;
}
int multirom_path_exists(char *base, char *filename)
{
char path[256];
sprintf(path, "%s/%s", base, filename);
if(access(path, R_OK) < 0)
return -1;
return 0;
}
int multirom_get_rom_type(struct multirom_rom *rom)
{
if(!rom->partition && strcmp(rom->name, INTERNAL_ROM_NAME) == 0)
return ROM_DEFAULT;
char *b = rom->base_path;
// Handle android ROMs
if(!multirom_path_exists(b, "boot"))
{
if (!multirom_path_exists(b, "system") && !multirom_path_exists(b, "data") &&
!multirom_path_exists(b, "cache"))
{
if(!rom->partition) return ROM_ANDROID_INTERNAL;
else return ROM_ANDROID_USB_DIR;
}
else if(!multirom_path_exists(b, "system.img") && !multirom_path_exists(b, "data.img") &&
!multirom_path_exists(b, "cache.img"))
{
return ROM_ANDROID_USB_IMG;
}
}
// handle linux ROMs
if(!multirom_path_exists(b, "rom_info.txt"))
{
if(!rom->partition)
return ROM_LINUX_INTERNAL;
else
return ROM_LINUX_USB;
}
// Handle Ubuntu 13.04 - deprecated
if ((!multirom_path_exists(b, "root") && multirom_path_exists(b, "boot.img")) ||
(!multirom_path_exists(b, "root.img") && rom->partition))
{
// try to copy rom_info.txt in there, ubuntu is deprecated
ERROR("Found deprecated Ubuntu 13.04, trying to copy rom_info.txt...\n");
char *cmd[] = { busybox_path, "cp", malloc(256), malloc(256), NULL };
sprintf(cmd[2], "%s/infos/ubuntu.txt", multirom_dir);
sprintf(cmd[3], "%s/rom_info.txt", b);
int res = run_cmd(cmd);
free(cmd[2]);
free(cmd[3]);
if(res != 0)
{
ERROR("Failed to copy rom_info for Ubuntu!\n");
if(!rom->partition) return ROM_UNSUPPORTED_INT;
else return ROM_UNSUPPORTED_USB;
}
else
{
if(!rom->partition) return ROM_LINUX_INTERNAL;
else return ROM_LINUX_USB;
}
}
// Handle ubuntu 12.10
if(!multirom_path_exists(b, "root") && !multirom_path_exists(b, "boot.img"))
{
if(!rom->partition) return ROM_UNSUPPORTED_INT;
else return ROM_UNSUPPORTED_USB;
}
return ROM_UNKNOWN;
}
int multirom_import_internal(void)
{
char path[256];
// multirom
mkdir(multirom_dir, 0777);
// roms
sprintf(path, "%s/roms", multirom_dir);
mkdir(path, 0777);
// internal rom
sprintf(path, "%s/roms/%s", multirom_dir, INTERNAL_ROM_NAME);
mkdir(path, 0777);
// boot image
sprintf(path, "%s/roms/%s/boot.img", multirom_dir, INTERNAL_ROM_NAME);
return multirom_dump_boot(path);
}
int multirom_dump_boot(const char *dest)
{
fb_debug("Dumping boot image...");
// 0 1 2 3
char *cmd[] = { busybox_path, "dd", "if="BOOT_BLK, NULL, NULL };
cmd[3] = malloc(256);
sprintf(cmd[3], "of=%s", dest);
int res = run_cmd(cmd);
free(cmd[3]);
fb_debug("done, result: %d\n", res);
return res;
}
struct multirom_rom *multirom_get_rom(struct multirom_status *s, const char *name, const char *part_uuid)
{
int i = 0;
struct multirom_rom *r;
for(; s->roms && s->roms[i]; ++i)
{
r = s->roms[i];
if (strcmp(r->name, name) == 0 &&
(!part_uuid || (r->partition && strcmp(r->partition->uuid, part_uuid) == 0)))
{
return r;
}
}
return NULL;
}
int multirom_generate_rom_id(void)
{
static int id = 0;
return id++;
}
struct multirom_rom *multirom_get_rom_by_id(struct multirom_status *s, int id)
{
int i = 0;
for(; s->roms && s->roms[i]; ++i)
if(s->roms[i]->id == id)
return s->roms[i];
return NULL;
}
void multirom_dump_status(struct multirom_status *s)
{
fb_debug("Dumping multirom status:\n");
fb_debug(" is_second_boot=%d\n", s->is_second_boot);
fb_debug(" current_rom=%s\n", s->current_rom ? s->current_rom->name : "NULL");
fb_debug(" auto_boot_seconds=%d\n", s->auto_boot_seconds);
fb_debug(" auto_boot_rom=%s\n", s->auto_boot_rom ? s->auto_boot_rom->name : "NULL");
fb_debug(" curr_rom_part=%s\n", s->curr_rom_part ? s->curr_rom_part : "NULL");
fb_debug("\n");
int i, y;
char buff[256];
for(i = 0; s->roms && s->roms[i]; ++i)
{
fb_debug(" ROM: %s\n", s->roms[i]->name);
fb_debug(" base_path: %s\n", s->roms[i]->base_path);
fb_debug(" type: %d\n", s->roms[i]->type);
fb_debug(" has_bootimg: %d\n", s->roms[i]->has_bootimg);
}
}
int multirom_prepare_for_boot(struct multirom_status *s, struct multirom_rom *to_boot)
{
int exit = EXIT_UMOUNT;
int type = to_boot->type;
if(((M(type) & MASK_KEXEC) || to_boot->has_bootimg) && type != ROM_DEFAULT && s->is_second_boot == 0)
{
if(multirom_load_kexec(s, to_boot) != 0)
return -1;
exit |= EXIT_KEXEC;
}
switch(type)
{
case ROM_DEFAULT:
case ROM_LINUX_INTERNAL:
case ROM_LINUX_USB:
break;
case ROM_ANDROID_USB_IMG:
case ROM_ANDROID_USB_DIR:
case ROM_ANDROID_INTERNAL:
{
if(!(exit & (EXIT_REBOOT | EXIT_KEXEC)))
exit &= ~(EXIT_UMOUNT);
if(multirom_prep_android_mounts(to_boot) == -1)
return -1;
if(multirom_create_media_link() == -1)
return -1;
if(to_boot->partition)
to_boot->partition->keep_mounted = 1;
break;
}
default:
ERROR("Unknown ROM type\n");
return -1;
}
return exit;
}
void multirom_free_status(struct multirom_status *s)
{
list_clear(&s->partitions, &multirom_destroy_partition);
list_clear(&s->roms, &multirom_free_rom);
free(s->curr_rom_part);
}
void multirom_free_rom(void *rom)
{
free(((struct multirom_rom*)rom)->name);
free(((struct multirom_rom*)rom)->base_path);
free(rom);
}
#define EXEC_MASK (S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP)
int multirom_prep_android_mounts(struct multirom_rom *rom)
{
char in[128];
char out[128];
char folder[256];
sprintf(folder, "%s/boot", rom->base_path);
DIR *d = opendir(folder);
if(!d)
{
ERROR("Failed to open rom folder %s", folder);
return -1;
}
struct dirent *dp = NULL;
char line[1024];
FILE *f_in = NULL;
FILE *f_out = NULL;
int add_dummy = 0;
while((dp = readdir(d)))
{
sprintf(in, "%s/%s", folder, dp->d_name);
sprintf(out, "/%s", dp->d_name);
// just copy the file if not rc
if(!strstr(dp->d_name, ".rc"))
{
copy_file(in, out);
continue;
}
f_in = fopen(in, "r");
if(!f_in)
continue;
f_out = fopen(out, "w");
if(!f_out)
{
fclose(f_in);
continue;
}
while((fgets(line, sizeof(line), f_in)))
{
if (strstr(line, "on "))
add_dummy = 1;
// Remove mounts from RCs
else if (strstr(line, "mount_all") ||
(strstr(line, "mount ") && (strstr(line, "/data") || strstr(line, "/system"))))
{
if(add_dummy == 1)
{
add_dummy = 0;
fputs(" export DUMMY_LINE_INGORE_IT 1\n", f_out);
}
// This is needed to start sdcard and gps daemon
// (class late_start). Calling "on unencrypted"
// is in mount_all cmd, which is just not cool.
if(strstr(line, "mount_all"))
{
fputs(" setprop ro.crypto.state unencrypted\n", f_out);
fputs(" trigger nonencrypted\n", f_out);
}
fputc((int)'#', f_out);
}
fputs(line, f_out);
}
fclose(f_out);
fclose(f_in);
chmod(out, EXEC_MASK);
}
closedir(d);
mkdir_with_perms("/system", 0755, NULL, NULL);
mkdir_with_perms("/data", 0771, "system", "system");
mkdir_with_perms("/cache", 0770, "system", "cache");
static const char *folders[2][3] =
{
{ "system", "data", "cache" },
{ "system.img", "data.img", "cache.img" },
};
unsigned long flags[2][3] = {
{ MS_BIND | MS_RDONLY, MS_BIND, MS_BIND },
{ MS_RDONLY | MS_NOATIME, MS_NOATIME, MS_NOATIME },
};
uint32_t i;
char from[256];
char to[256];
int img = (int)(rom->type == ROM_ANDROID_USB_IMG);
for(i = 0; i < ARRAY_SIZE(folders[0]); ++i)
{
sprintf(from, "%s/%s", rom->base_path, folders[img][i]);
sprintf(to, "/%s", folders[0][i]);
if(img == 0)
{
if(mount(from, to, "ext4", flags[img][i], "") < 0)
{
ERROR("Failed to mount %s to %s (%d: %s)", from, to, errno, strerror(errno));
return -1;
}
}
else
{
if(multirom_mount_loop(from, to, "ext4", flags[img][i]) < 0)
return -1;
}
}
return 0;
}
int multirom_create_media_link(void)
{
int media_new = 0;
int api_level = multirom_get_api_level("/system/build.prop");
if(api_level <= 0)
return -1;
struct stat info;
if(stat(REALDATA"/media/0", &info) >= 0)
media_new = 1;
static const char *paths[] = {
REALDATA"/media", // 0
REALDATA"/media/0", // 1
"/data/media", // 2
"/data/media/0", // 3
};
int from, to;
if(api_level <= 16)
{
to = 2;
if(!media_new) from = 0;
else from = 1;
}
else if(api_level >= 17)
{
from = 0;
if(!media_new) to = 3;
else to = 2;
}
ERROR("Making media dir: api %d, media_new %d, %s to %s", api_level, media_new, paths[from], paths[to]);
if(mkdir_recursive(paths[to], 0775) == -1)
{
ERROR("Failed to make media dir");
return -1;
}
if(mount(paths[from], paths[to], "ext4", MS_BIND, "") < 0)
{
ERROR("Failed to bind media folder %d (%s)", errno, strerror(errno));
return -1;
}
if(api_level >= 17)
{
FILE *f = fopen(LAYOUT_VERSION, "w");
if(!f)
{
ERROR("Failed to create .layout_version!\n");
return -1;
}
fputs("2", f);
fclose(f);
chmod(LAYOUT_VERSION, 0600);
}
return 0;
}
int multirom_get_api_level(const char *path)
{
FILE *f = fopen(path, "r");
if(!f)
{
ERROR("Could not open %s to read api level!", path);
return -1;
}
int res = -1;
char line[256];
while(res == -1 && (fgets(line, sizeof(line), f)))
{
if(strstr(line, "ro.build.version.sdk=") == line)
res = atoi(strchr(line, '=')+1);
}
fclose(f);
if(res == 0)
ERROR("Invalid ro.build.version.sdk line in build.prop");
return res;
}
void multirom_take_screenshot(void)
{
char *buffer = NULL;
int len = fb_clone(&buffer);
int counter;
char path[256];
struct stat info;
FILE *f = NULL;
for(counter = 0; 1; ++counter)
{
sprintf(path, "%s/screenshot_%02d.raw", multirom_dir, counter);
if(stat(path, &info) >= 0)
continue;
f = fopen(path, "w");
if(f)
{
fwrite(buffer, 1, len, f);
fclose(f);
}
break;
}
free(buffer);
fb_fill(WHITE);