Magisk/native/jni/core/magisk.c

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/* main.c - The multicall entry point
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*/
#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
#include <libgen.h>
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#include "utils.h"
#include "magisk.h"
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#include "daemon.h"
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char *argv0;
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int (*applet_main[]) (int, char *[]) = { su_client_main, resetprop_main, magiskhide_main, NULL };
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int create_links(const char *bin, const char *path) {
char self[PATH_MAX], linkpath[PATH_MAX];
if (bin == NULL) {
xreadlink("/proc/self/exe", self, sizeof(self));
bin = self;
}
int ret = 0;
for (int i = 0; applet[i]; ++i) {
snprintf(linkpath, sizeof(linkpath), "%s/%s", path, applet[i]);
unlink(linkpath);
ret |= symlink(bin, linkpath);
}
return ret;
}
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static void usage() {
fprintf(stderr,
"Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) multi-call binary\n"
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"\n"
"Usage: magisk [applet [arguments]...]\n"
" or: magisk [options]...\n"
"\n"
"Options:\n"
" -c print current binary version\n"
" -v print running daemon version\n"
" -V print running daemon version code\n"
" --list list all available applets\n"
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" --install [SOURCE] DIR symlink all applets to DIR. SOURCE is optional\n"
" --createimg IMG SIZE create ext4 image. SIZE is interpreted in MB\n"
" --imgsize IMG report ext4 image used/total size\n"
" --resizeimg IMG SIZE resize ext4 image. SIZE is interpreted in MB\n"
" --mountimg IMG PATH mount IMG to PATH and prints the loop device\n"
" --umountimg PATH LOOP unmount PATH and delete LOOP device\n"
" --daemon manually start magisk daemon\n"
" --[init trigger] start service for init trigger\n"
" --unlock-blocks set BLKROSET flag to OFF for all block devices\n"
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" --restorecon fix selinux context on Magisk files and folders\n"
" --clone-attr SRC DEST clone permission, owner, and selinux context\n"
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"\n"
"Supported init triggers:\n"
" startup, post-fs-data, service\n"
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"\n"
"Supported applets:\n");
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for (int i = 0; applet[i]; ++i)
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fprintf(stderr, i ? ", %s" : " %s", applet[i]);
fprintf(stderr, "\n\n");
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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) {
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restorecon();
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);
}
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// Applets
argc--;
argv++;
for (int i = 0; applet[i]; ++i) {
if (strcmp(basename(argv[0]), applet[i]) == 0)
return (*applet_main[i])(argc, argv);
}
usage();
return 1;
}
int main(int argc, char *argv[]) {
umask(0);
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argv0 = argv[0];
if (strcmp(basename(argv0), "magisk.bin") == 0) {
if (argc >= 2) {
// It's calling applets
--argc;
++argv;
}
}
// Applets
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for (int i = 0; applet[i]; ++i) {
if (strcmp(basename(argv[0]), applet[i]) == 0)
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return (*applet_main[i])(argc, argv);
}
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// Not an applet
return magisk_main(argc, argv);
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}