From be950c5e56b86509e1e237931d0ac8203372be82 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Fri, 8 Mar 2013 23:45:49 +0100 Subject: [PATCH] add early handler --- early.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 early.c diff --git a/early.c b/early.c new file mode 100644 index 0000000..063e1a6 --- /dev/null +++ b/early.c @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2013 Felix Fietkau + * Copyright (C) 2013 John Crispin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include + +#include +#include +#include + +#include "procd.h" + +static void early_mounts(void) +{ + mount("proc", "/proc", "proc", 0, 0); + mount("sysfs", "/sys", "sysfs", 0, 0); + + mount("tmpfs", "/tmp", "tmpfs", MS_NOSUID | MS_NODEV, "size=512k,mode=1777"); + mkdir("/tmp/run", 0777); + mkdir("/tmp/lock", 0777); + mkdir("/tmp/state", 0777); + symlink("/tmp", "/var"); + + mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755,size=512K"); + mkdir("/dev/shm", 0755); + mkdir("/dev/pts", 0755); + mount("devpts", "/dev/pts", "devpts", 0, 0); +} + +static void early_dev(void) +{ + mkdev("*", 0600); +} + +static void early_console(const char *dev) +{ + struct stat s; + int dd; + + if (stat(dev, &s)) + mkdev("*console", 0600); + + dd = open(dev, O_RDWR); + close(STDIN_FILENO); + close(STDOUT_FILENO); + close(STDERR_FILENO); + + if (dd < 0) { + ERROR("Failed to open %s\n", dev); + return; + } + + dup2(dd, STDIN_FILENO); + dup2(dd, STDOUT_FILENO); + dup2(dd, STDERR_FILENO); + close(dd); +} + +static void early_env(void) +{ + setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin", 1); +} + +void procd_early(void) +{ + if (getpid() != 1) + return; + + early_mounts(); + early_dev(); + early_env(); + early_console("/dev/console"); + + LOG("Console is alive\n"); +} -- 2.25.1