#include <sys/types.h> #include <sys/mount.h> #include <sys/stat.h> #include <sys/wait.h> #include <unistd.h> #include <stdlib.h> #include <stdarg.h> #include <stdio.h> int run(const char *path, ...) { va_list ap; char **argv; int argvMax, argvIdx; pid_t pid; int pidstat; pid = fork(); if (pid == ((pid_t) -1)) { return(-1); } if (pid != 0) { waitpid(pid, &pidstat, 0); return(pidstat); } argvMax = 32; argv = malloc(sizeof(*argv) * argvMax); va_start(ap, path); for (argvIdx = 0; argvIdx < argvMax; argvIdx++) { argv[argvIdx] = va_arg(ap, char *); if (argv[argvIdx] == NULL) { break; } } va_end(ap); execv(path, argv); exit(EXIT_FAILURE); } int main(int argc, char **argv) { /* * Remount root filesystem read-write */ mount("/dev/vda2", "/", "ext4", MS_REMOUNT, NULL); /* * Mount needed filesystems */ mkdir("/dev", 0755); mount("devtmpfs", "/dev", "devtmpfs", 0, NULL); mkdir("/tmp", 0755); mount("tmpfs", "/tmp", "tmpfs", 0, NULL); mkdir("/proc", 0755); mount("proc", "/proc", "proc", 0, NULL); mkdir("/sys", 0755); mount("sysfs", "/sys", "sysfs", 0, NULL); /* * Setup networking */ run("/bin/init-networking", "init-networking", NULL); run("/bin/init-fuse", "init-fuse", NULL); mkdir("/etc", 0755); mkdir("/bin", 0755); mkdir("/lib", 0755); mkdir("/opt", 0755); mkdir("/opt/appfs", 0755); mkdir("/var", 0755); mkdir("/var/cache", 0755); mkdir("/var/cache/appfs", 0755); run("/bin/appfsd", "appfsd", "/var/cache/appfs", "/opt/appfs", NULL); symlink(".", "/usr"); symlink("lib", "/lib64"); symlink("/proc/self/mounts", "/etc/mtab"); symlink("/opt/appfs/core.appfs.rkeene.org/bash/platform/latest/bin/bash", "/bin/bash"); symlink("/opt/appfs/core.appfs.rkeene.org/coreutils/platform/latest/bin/env", "/bin/env"); symlink("/bin/bash", "/bin/sh"); setenv("PATH", "/bin:/opt/appfs/core.appfs.rkeene.org/coreutils/platform/latest/bin", 1); run("/bin/appfs-cache", "appfs-cache", "install", "-lib", "core.appfs.rkeene.org", "glibc", NULL); run("/bin/appfs-cache", "appfs-cache", "install", "core.appfs.rkeene.org", "coreutils", NULL); setenv("PATH", "/bin", 1); run("/bin/sh", "sh", NULL); /* * Remount root filesystem read-only */ umount("/dev"); umount("/tmp"); umount("/proc"); umount("/sys"); umount("/opt/appfs"); mount("/dev/vda2", "/", "ext4", MS_REMOUNT | MS_RDONLY, NULL); sync(); return(0); }