1282113fdSPekka Enberg /* 29cec19c8SSasha Levin * This is a simple init for shared rootfs guests. This part should be limited 39cec19c8SSasha Levin * to doing mounts and running stage 2 of the init process. 4282113fdSPekka Enberg */ 5282113fdSPekka Enberg #include <sys/mount.h> 6282113fdSPekka Enberg #include <string.h> 7282113fdSPekka Enberg #include <unistd.h> 8282113fdSPekka Enberg #include <stdio.h> 9282113fdSPekka Enberg #include <errno.h> 1091d6a8e3SAsias He #include <linux/reboot.h> 11282113fdSPekka Enberg 12282113fdSPekka Enberg static int run_process(char *filename) 13282113fdSPekka Enberg { 14282113fdSPekka Enberg char *new_argv[] = { filename, NULL }; 15b757c2a6SAsias He char *new_env[] = { "TERM=linux", "DISPLAY=192.168.33.1:0", NULL }; 16282113fdSPekka Enberg 17282113fdSPekka Enberg return execve(filename, new_argv, new_env); 18282113fdSPekka Enberg } 19282113fdSPekka Enberg 2091d6a8e3SAsias He static int run_process_sandbox(char *filename) 2191d6a8e3SAsias He { 2291d6a8e3SAsias He char *new_argv[] = { filename, "/virt/sandbox.sh", NULL }; 2391d6a8e3SAsias He char *new_env[] = { "TERM=linux", NULL }; 2491d6a8e3SAsias He 2591d6a8e3SAsias He return execve(filename, new_argv, new_env); 2691d6a8e3SAsias He } 2791d6a8e3SAsias He 28282113fdSPekka Enberg static void do_mounts(void) 29282113fdSPekka Enberg { 30282113fdSPekka Enberg mount("hostfs", "/host", "9p", MS_RDONLY, "trans=virtio,version=9p2000.L"); 31282113fdSPekka Enberg mount("", "/sys", "sysfs", 0, NULL); 32282113fdSPekka Enberg mount("proc", "/proc", "proc", 0, NULL); 33282113fdSPekka Enberg mount("devtmpfs", "/dev", "devtmpfs", 0, NULL); 34*69071bceSAsias He mkdir("/dev/pts", 0755); 35*69071bceSAsias He mount("devpts", "/dev/pts", "devpts", 0, NULL); 36282113fdSPekka Enberg } 37282113fdSPekka Enberg 38282113fdSPekka Enberg int main(int argc, char *argv[]) 39282113fdSPekka Enberg { 4091d6a8e3SAsias He pid_t child; 4191d6a8e3SAsias He int status; 4291d6a8e3SAsias He 43282113fdSPekka Enberg puts("Mounting..."); 44282113fdSPekka Enberg 45282113fdSPekka Enberg do_mounts(); 46282113fdSPekka Enberg 4791d6a8e3SAsias He /* get session leader */ 4891d6a8e3SAsias He setsid(); 4991d6a8e3SAsias He 5091d6a8e3SAsias He /* set controlling terminal */ 5191d6a8e3SAsias He ioctl(0, TIOCSCTTY, 1); 5291d6a8e3SAsias He 5391d6a8e3SAsias He child = fork(); 5491d6a8e3SAsias He if (child < 0) { 5591d6a8e3SAsias He printf("Fatal: fork() failed with %d\n", child); 5691d6a8e3SAsias He return 0; 5791d6a8e3SAsias He } else if (child == 0) { 5891d6a8e3SAsias He if (access("/virt/sandbox.sh", R_OK) == 0) 5991d6a8e3SAsias He run_process_sandbox("/bin/sh"); 6091d6a8e3SAsias He else 6191d6a8e3SAsias He run_process("/bin/sh"); 6291d6a8e3SAsias He } else { 6391d6a8e3SAsias He waitpid(child, &status, 0); 6491d6a8e3SAsias He } 6591d6a8e3SAsias He 6691d6a8e3SAsias He reboot(LINUX_REBOOT_CMD_RESTART); 67282113fdSPekka Enberg 68282113fdSPekka Enberg printf("Init failed: %s\n", strerror(errno)); 69282113fdSPekka Enberg 70282113fdSPekka Enberg return 0; 71282113fdSPekka Enberg } 72