MarcoBuster/Magisk
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Use wrapper script to prevent crazy LD_XXX flags

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This commit is contained in:
topjohnwu 2018-05-13 14:32:21 +08:00
parent 1412fcbb22
commit c0e2f44092
2 changed files with 118 additions and 101 deletions
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15
native/jni/core/bootstages.c
View File

@ -465,6 +465,12 @@ static void unblock_boot_process() {
pthread_exit(NULL); pthread_exit(NULL);
} }
static const char wrapper[] =
"#!/system/bin/sh\n"
"unset LD_LIBRARY_PATH\n"
"unset LD_PRELOAD\n"
"exec /sbin/magisk.bin \"${0##*/}\" \"$@\"\n";
void startup() { void startup() {
if (!check_data()) if (!check_data())
return; return;
@ -537,12 +543,17 @@ initialize:
setfilecon("/sbin", "u:object_r:rootfs:s0"); setfilecon("/sbin", "u:object_r:rootfs:s0");
sbin = xopen("/sbin", O_RDONLY | O_CLOEXEC); sbin = xopen("/sbin", O_RDONLY | O_CLOEXEC);
// Setup magisk symlinks // Create wrapper
fd = creat("/sbin/magisk", 0755); fd = creat("/sbin/magisk", 0755);
xwrite(fd, wrapper, sizeof(wrapper) - 1);
close(fd);
setfilecon("/sbin/magisk", "u:object_r:"SEPOL_FILE_DOMAIN":s0");
// Setup magisk symlinks
fd = creat("/sbin/magisk.bin", 0755);
xwrite(fd, magisk, magisk_size); xwrite(fd, magisk, magisk_size);
close(fd); close(fd);
free(magisk); free(magisk);
setfilecon("/sbin/magisk", "u:object_r:"SEPOL_FILE_DOMAIN":s0"); setfilecon("/sbin/magisk.bin", "u:object_r:"SEPOL_FILE_DOMAIN":s0");
for (int i = 0; applet[i]; ++i) { for (int i = 0; applet[i]; ++i) {
snprintf(buf, PATH_MAX, "/sbin/%s", applet[i]); snprintf(buf, PATH_MAX, "/sbin/%s", applet[i]);
xsymlink("/sbin/magisk", buf); xsymlink("/sbin/magisk", buf);

204
native/jni/core/magisk.c
View File

@ -33,8 +33,8 @@ static void usage() {
fprintf(stderr, fprintf(stderr,
"Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) multi-call binary\n" "Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) multi-call binary\n"
"\n" "\n"
"Usage: %s [applet [arguments]...]\n" "Usage: magisk [applet [arguments]...]\n"
" or: %s [options]...\n" " or: magisk [options]...\n"
"\n" "\n"
"Options:\n" "Options:\n"
" -c print current binary version\n" " -c print current binary version\n"
@ -56,8 +56,7 @@ static void usage() {
"Supported init triggers:\n" "Supported init triggers:\n"
" startup, post-fs-data, service\n" " startup, post-fs-data, service\n"
"\n" "\n"
"Supported applets:\n" "Supported applets:\n");
, argv0, argv0);
for (int i = 0; applet[i]; ++i) for (int i = 0; applet[i]; ++i)
fprintf(stderr, i ? ", %s" : " %s", applet[i]); fprintf(stderr, i ? ", %s" : " %s", applet[i]);
@ -65,102 +64,109 @@ static void usage() {
exit(1); exit(1);
} }
int magisk_main(int argc, char *argv[]) {
if (argc < 2)
usage();
if (strcmp(argv[1], "-c") == 0) {
printf("%s (%d)\n", MAGISK_VER_STR, MAGISK_VER_CODE);
return 0;
} else if (strcmp(argv[1], "-v") == 0) {
int fd = connect_daemon(0);
write_int(fd, CHECK_VERSION);
char *v = read_string(fd);
printf("%s\n", v);
free(v);
return 0;
} else if (strcmp(argv[1], "-V") == 0) {
int fd = connect_daemon(0);
write_int(fd, CHECK_VERSION_CODE);
printf("%d\n", read_int(fd));
return 0;
} else if (strcmp(argv[1], "--install") == 0) {
if (argc < 3) usage();
if (argc == 3) return create_links(NULL, argv[2]);
else return create_links(argv[2], argv[3]);
} else if (strcmp(argv[1], "--list") == 0) {
for (int i = 0; applet[i]; ++i)
printf("%s\n", applet[i]);
return 0;
} else if (strcmp(argv[1], "--createimg") == 0) {
if (argc < 4) usage();
int size;
sscanf(argv[3], "%d", &size);
return create_img(argv[2], size);
} else if (strcmp(argv[1], "--imgsize") == 0) {
if (argc < 3) usage();
int used, total;
if (get_img_size(argv[2], &used, &total)) {
fprintf(stderr, "Cannot check %s size\n", argv[2]);
return 1;
}
printf("%d %d\n", used, total);
return 0;
} else if (strcmp(argv[1], "--resizeimg") == 0) {
if (argc < 4) usage();
int used, total, size;
sscanf(argv[3], "%d", &size);
if (get_img_size(argv[2], &used, &total)) {
fprintf(stderr, "Cannot check %s size\n", argv[2]);
return 1;
}
if (size <= used) {
fprintf(stderr, "Cannot resize smaller than %dM\n", used);
return 1;
}
return resize_img(argv[2], size);
} else if (strcmp(argv[1], "--mountimg") == 0) {
if (argc < 4) usage();
char *loop = mount_image(argv[2], argv[3]);
if (loop == NULL) {
fprintf(stderr, "Cannot mount image!\n");
return 1;
} else {
printf("%s\n", loop);
free(loop);
return 0;
}
} else if (strcmp(argv[1], "--umountimg") == 0) {
if (argc < 4) usage();
umount_image(argv[2], argv[3]);
return 0;
} else if (strcmp(argv[1], "--unlock-blocks") == 0) {
unlock_blocks();
return 0;
} else if (strcmp(argv[1], "--restorecon") == 0) {
fix_filecon();
return 0;
} else if (strcmp(argv[1], "--clone-attr") == 0) {
if (argc < 4) usage();
clone_attr(argv[2], argv[3]);
return 0;
} else if (strcmp(argv[1], "--daemon") == 0) {
int fd = connect_daemon(0);
close(fd);
return 0;
} else if (strcmp(argv[1], "--startup") == 0) {
startup();
return 0;
} else if (strcmp(argv[1], "--post-fs-data") == 0) {
int fd = connect_daemon(1);
write_int(fd, POST_FS_DATA);
return read_int(fd);
} else if (strcmp(argv[1], "--service") == 0) {
int fd = connect_daemon(0);
write_int(fd, LATE_START);
return read_int(fd);
}
usage();
return 1;
}
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
umask(0); umask(0);
argv0 = argv[0]; argv0 = argv[0];
if (strcmp(basename(argv[0]), "magisk") == 0) { if (strcmp(basename(argv0), "magisk.bin") == 0) {
if (argc < 2) usage(); if (argc >= 2) {
if (strcmp(argv[1], "-c") == 0) {
printf("%s (%d)\n", MAGISK_VER_STR, MAGISK_VER_CODE);
return 0;
} else if (strcmp(argv[1], "-v") == 0) {
int fd = connect_daemon(0);
write_int(fd, CHECK_VERSION);
char *v = read_string(fd);
printf("%s\n", v);
free(v);
return 0;
} else if (strcmp(argv[1], "-V") == 0) {
int fd = connect_daemon(0);
write_int(fd, CHECK_VERSION_CODE);
printf("%d\n", read_int(fd));
return 0;
} else if (strcmp(argv[1], "--install") == 0) {
if (argc < 3) usage();
if (argc == 3) return create_links(NULL, argv[2]);
else return create_links(argv[2], argv[3]);
} else if (strcmp(argv[1], "--list") == 0) {
for (int i = 0; applet[i]; ++i)
printf("%s\n", applet[i]);
return 0;
} else if (strcmp(argv[1], "--createimg") == 0) {
if (argc < 4) usage();
int size;
sscanf(argv[3], "%d", &size);
return create_img(argv[2], size);
} else if (strcmp(argv[1], "--imgsize") == 0) {
if (argc < 3) usage();
int used, total;
if (get_img_size(argv[2], &used, &total)) {
fprintf(stderr, "Cannot check %s size\n", argv[2]);
return 1;
}
printf("%d %d\n", used, total);
return 0;
} else if (strcmp(argv[1], "--resizeimg") == 0) {
if (argc < 4) usage();
int used, total, size;
sscanf(argv[3], "%d", &size);
if (get_img_size(argv[2], &used, &total)) {
fprintf(stderr, "Cannot check %s size\n", argv[2]);
return 1;
}
if (size <= used) {
fprintf(stderr, "Cannot resize smaller than %dM\n", used);
return 1;
}
return resize_img(argv[2], size);
} else if (strcmp(argv[1], "--mountimg") == 0) {
if (argc < 4) usage();
char *loop = mount_image(argv[2], argv[3]);
if (loop == NULL) {
fprintf(stderr, "Cannot mount image!\n");
return 1;
} else {
printf("%s\n", loop);
free(loop);
return 0;
}
} else if (strcmp(argv[1], "--umountimg") == 0) {
if (argc < 4) usage();
umount_image(argv[2], argv[3]);
return 0;
} else if (strcmp(argv[1], "--unlock-blocks") == 0) {
unlock_blocks();
return 0;
} else if (strcmp(argv[1], "--restorecon") == 0) {
fix_filecon();
return 0;
} else if (strcmp(argv[1], "--clone-attr") == 0) {
if (argc < 4) usage();
clone_attr(argv[2], argv[3]);
return 0;
} else if (strcmp(argv[1], "--daemon") == 0) {
int fd = connect_daemon(0);
close(fd);
return 0;
} else if (strcmp(argv[1], "--startup") == 0) {
startup();
return 0;
} else if (strcmp(argv[1], "--post-fs-data") == 0) {
int fd = connect_daemon(1);
write_int(fd, POST_FS_DATA);
return read_int(fd);
} else if (strcmp(argv[1], "--service") == 0) {
int fd = connect_daemon(0);
write_int(fd, LATE_START);
return read_int(fd);
} else {
// It's calling applets // It's calling applets
--argc; --argc;
++argv; ++argv;
@ -173,6 +179,6 @@ int main(int argc, char *argv[]) {
return (*applet_main[i])(argc, argv); return (*applet_main[i])(argc, argv);
} }
fprintf(stderr, "%s: applet not found\n", basename(argv[0])); // Not an applet
return 1; return magisk_main(argc, argv);
} }