78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
#include "magiskhide.h"
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int hideMagisk() {
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close(pipefd[1]);
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int pid, fd;
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char cache_block[256];
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cache_block[0] = '\0';
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while(1) {
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read(pipefd[0], &pid, sizeof(pid));
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// Termination called
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if(pid == -1) break;
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manage_selinux();
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snprintf(buffer, sizeof(buffer), "/proc/%d/ns/mnt", pid);
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if((fd = open(buffer, O_RDONLY)) == -1) continue; // Maybe process died..
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if(setns(fd, 0) == -1) {
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fprintf(logfile, "MagiskHide: Unable to change namespace for pid=%d\n", pid);
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continue;
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}
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close(fd);
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snprintf(buffer, sizeof(buffer), "/proc/%d/mounts", pid);
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FILE *mount_fp = fopen(buffer, "r");
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if (mount_fp == NULL) {
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fprintf(logfile, "MagiskHide: Error opening mount list!\n");
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continue;
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}
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int mount_size;
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char **mount_list = file_to_str_arr(mount_fp, &mount_size);
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// Find the cache block name if not found yet
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if (strlen(cache_block) == 0) {
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for(i = 0; i < mount_size; ++i) {
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if (strstr(mount_list[i], " /cache ")) {
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sscanf(mount_list[i], "%256s", cache_block);
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break;
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}
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}
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}
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// First unmount the dummy skeletons and the cache mounts
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for(i = mount_size - 1; i >= 0; --i) {
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if (strstr(mount_list[i], "tmpfs /system") || strstr(mount_list[i], "tmpfs /vendor")
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|| (strstr(mount_list[i], cache_block) && strstr(mount_list[i], "/system")) ) {
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sscanf(mount_list[i], "%*s %512s", buffer);
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lazy_unmount(buffer);
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}
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free(mount_list[i]);
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}
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free(mount_list);
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// Re-read mount infos
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fseek(mount_fp, 0, SEEK_SET);
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mount_list = file_to_str_arr(mount_fp, &mount_size);
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fclose(mount_fp);
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// Unmount loop mounts
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for(i = mount_size - 1; i >= 0; --i) {
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if (strstr(mount_list[i], "/dev/block/loop") && !strstr(mount_list[i], DUMMYPATH)) {
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sscanf(mount_list[i], "%*s %512s", buffer);
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lazy_unmount(buffer);
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}
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free(mount_list[i]);
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}
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free(mount_list);
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// Send resume signal
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kill(pid, SIGCONT);
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}
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// Should never go here
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return 1;
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}
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