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
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@ -465,6 +465,12 @@ static void unblock_boot_process() {
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() {
if (!check_data())
return;
@ -537,12 +543,17 @@ initialize:
setfilecon("/sbin", "u:object_r:rootfs:s0");
sbin = xopen("/sbin", O_RDONLY | O_CLOEXEC);
// Setup magisk symlinks
// Create wrapper
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);
close(fd);
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) {
snprintf(buf, PATH_MAX, "/sbin/%s", applet[i]);
xsymlink("/sbin/magisk", buf);

30
native/jni/core/magisk.c
View File

@ -33,8 +33,8 @@ static void usage() {
fprintf(stderr,
"Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) multi-call binary\n"
"\n"
"Usage: %s [applet [arguments]...]\n"
" or: %s [options]...\n"
"Usage: magisk [applet [arguments]...]\n"
" or: magisk [options]...\n"
"\n"
"Options:\n"
" -c print current binary version\n"
@ -56,8 +56,7 @@ static void usage() {
"Supported init triggers:\n"
" startup, post-fs-data, service\n"
"\n"
"Supported applets:\n"
, argv0, argv0);
"Supported applets:\n");
for (int i = 0; applet[i]; ++i)
fprintf(stderr, i ? ", %s" : " %s", applet[i]);
@ -65,11 +64,9 @@ static void usage() {
exit(1);
}
int main(int argc, char *argv[]) {
umask(0);
argv0 = argv[0];
if (strcmp(basename(argv[0]), "magisk") == 0) {
if (argc < 2) usage();
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;
@ -160,7 +157,16 @@ int main(int argc, char *argv[]) {
int fd = connect_daemon(0);
write_int(fd, LATE_START);
return read_int(fd);
} else {
}
usage();
return 1;
}
int main(int argc, char *argv[]) {
umask(0);
argv0 = argv[0];
if (strcmp(basename(argv0), "magisk.bin") == 0) {
if (argc >= 2) {
// It's calling applets
--argc;
++argv;
@ -173,6 +179,6 @@ int main(int argc, char *argv[]) {
return (*applet_main[i])(argc, argv);
}
fprintf(stderr, "%s: applet not found\n", basename(argv[0]));
return 1;
// Not an applet
return magisk_main(argc, argv);
}