1 /* 2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org> 3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU Lesser General Public License version 2.1 7 * as published by the Free Software Foundation 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <sys/mount.h> 16 #include <sys/types.h> 17 #include <sys/stat.h> 18 #include <sys/sysmacros.h> 19 20 #include <stdio.h> 21 #include <fcntl.h> 22 #include <unistd.h> 23 #include <stdlib.h> 24 25 #include "../utils/utils.h" 26 #include "init.h" 27 #include "../libc-compat.h" 28 #include "../container.h" 29 30 static void 31 early_dev(void) 32 { 33 mkdev("*", 0600); 34 mknod("/dev/null", 0666, makedev(1, 3)); 35 } 36 37 static void 38 early_console(const char *dev) 39 { 40 struct stat s; 41 42 if (stat(dev, &s)) { 43 ERROR("Failed to stat %s: %m\n", dev); 44 return; 45 } 46 47 if (patch_stdio(dev)) { 48 ERROR("Failed to setup i/o redirection\n"); 49 return; 50 } 51 52 fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK); 53 } 54 55 static void 56 early_mounts(void) 57 { 58 unsigned int oldumask = umask(0); 59 60 if (!is_container()) { 61 mount("proc", "/proc", "proc", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL); 62 mount("sysfs", "/sys", "sysfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL); 63 mount("efivars", "/sys/firmware/efi/efivars", "efivarfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, NULL); 64 mount("cgroup2", "/sys/fs/cgroup", "cgroup2", MS_NODEV | MS_NOEXEC | MS_NOSUID | MS_RELATIME, "nsdelegate"); 65 mount("tmpfs", "/dev", "tmpfs", MS_NOATIME | MS_NOEXEC | MS_NOSUID, "mode=0755,size=512K"); 66 ignore(symlink("/tmp/shm", "/dev/shm")); 67 mkdir("/dev/pts", 0755); 68 mount("devpts", "/dev/pts", "devpts", MS_NOATIME | MS_NOEXEC | MS_NOSUID, NULL); 69 70 early_dev(); 71 } 72 73 early_console("/dev/console"); 74 75 mount("tmpfs", "/tmp", "tmpfs", MS_NOSUID | MS_NODEV | MS_NOATIME, "mode=01777"); 76 mkdir("/tmp/shm", 01777); 77 78 mkdir("/tmp/run", 0755); 79 mkdir("/tmp/lock", 0755); 80 mkdir("/tmp/state", 0755); 81 umask(oldumask); 82 } 83 84 static void 85 early_env(void) 86 { 87 setenv("PATH", EARLY_PATH, 1); 88 } 89 90 void 91 early(void) 92 { 93 if (getpid() != 1) 94 return; 95 96 early_mounts(); 97 early_env(); 98 99 LOG("Console is alive\n"); 100 } 101
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