003e44fb84
We used to construct /sbin tmpfs overlay in early-init stage after SELinux is properly initialized. However the way it is implemented (forking daemon from magiskinit with complicated file waiting triggers) is extremely complicated and error prone. This commit moves the construction of the sbin overlay to pre-init stage. The catch is that since SELinux is not present at that point, proper selabel has to be reconstructed afterwards. Some additional SEPolicy rules are added to make sure init can access magisk binaries, and the secontext relabeling task is assigned to the main Magisk daemon.
116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
#include <sys/mount.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <string.h>
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#include <utils.h>
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#include <magisk.h>
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#include <daemon.h>
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#include <selinux.h>
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#include <db.h>
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#include <flags.h>
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[[noreturn]] static void usage() {
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fprintf(stderr,
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FULL_VER(Magisk) " multi-call binary\n"
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"\n"
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"Usage: magisk [applet [arguments]...]\n"
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" or: magisk [options]...\n"
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"\n"
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"Options:\n"
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" -c print current binary version\n"
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" -v print running daemon version\n"
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" -V print running daemon version code\n"
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" --list list all available applets\n"
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" --daemon manually start magisk daemon\n"
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" --[init trigger] start service for init trigger\n"
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"\n"
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"Advanced Options (Internal APIs):\n"
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" --unlock-blocks set BLKROSET flag to OFF for all block devices\n"
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" --restorecon restore selinux context on Magisk files\n"
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" --clone-attr SRC DEST clone permission, owner, and selinux context\n"
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" --clone SRC DEST clone SRC to DEST\n"
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" --sqlite SQL exec SQL to Magisk database\n"
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"\n"
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"Supported init triggers:\n"
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" post-fs-data, service, boot-complete\n"
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"\n"
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"Supported applets:\n");
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for (int i = 0; applet_names[i]; ++i)
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fprintf(stderr, i ? ", %s" : " %s", applet_names[i]);
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fprintf(stderr, "\n\n");
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exit(1);
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}
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int magisk_main(int argc, char *argv[]) {
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if (argc < 2)
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usage();
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if (strcmp(argv[1], "-c") == 0) {
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printf(MAGISK_VERSION ":MAGISK (" str(MAGISK_VER_CODE) ")\n");
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return 0;
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} else if (strcmp(argv[1], "-v") == 0) {
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int fd = connect_daemon();
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write_int(fd, CHECK_VERSION);
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char *v = read_string(fd);
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printf("%s\n", v);
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free(v);
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return 0;
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} else if (strcmp(argv[1], "-V") == 0) {
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int fd = connect_daemon();
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write_int(fd, CHECK_VERSION_CODE);
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printf("%d\n", read_int(fd));
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return 0;
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} else if (strcmp(argv[1], "--list") == 0) {
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for (int i = 0; applet_names[i]; ++i)
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printf("%s\n", applet_names[i]);
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return 0;
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} else if (strcmp(argv[1], "--unlock-blocks") == 0) {
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unlock_blocks();
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return 0;
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} else if (strcmp(argv[1], "--restorecon") == 0) {
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restore_rootcon();
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restorecon();
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return 0;
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} else if (strcmp(argv[1], "--clone-attr") == 0) {
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if (argc < 4) usage();
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clone_attr(argv[2], argv[3]);
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return 0;
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} else if (strcmp(argv[1], "--clone") == 0) {
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if (argc < 4) usage();
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cp_afc(argv[2], argv[3]);
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return 0;
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} else if (strcmp(argv[1], "--daemon") == 0) {
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int fd = connect_daemon(true);
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write_int(fd, DO_NOTHING);
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return 0;
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} else if (strcmp(argv[1], "--post-fs-data") == 0) {
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int fd = connect_daemon(true);
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write_int(fd, POST_FS_DATA);
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return read_int(fd);
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} else if (strcmp(argv[1], "--service") == 0) {
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int fd = connect_daemon(true);
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write_int(fd, LATE_START);
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return read_int(fd);
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} else if (strcmp(argv[1], "--boot-complete") == 0) {
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int fd = connect_daemon(true);
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write_int(fd, BOOT_COMPLETE);
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return read_int(fd);
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} else if (strcmp(argv[1], "--sqlite") == 0) {
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int fd = connect_daemon();
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write_int(fd, SQLITE_CMD);
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write_string(fd, argv[2]);
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send_fd(fd, STDOUT_FILENO);
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return read_int(fd);
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}
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#if 0
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/* Entry point for testing stuffs */
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else if (strcmp(argv[1], "--test") == 0) {
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return 0;
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}
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#endif
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usage();
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}
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