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56d17f74e8
propagator/init.c
Alexander V. Nikolaev 56d17f74e8 Make compilable by gcc 3.3
2004-03-10 16:54:55 +00:00

498 lines
11 KiB
C
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/*
* Guillaume Cottenceau (gc@mandrakesoft.com)
*
* Copyright 2000 MandrakeSoft
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* Portions from Erik Troan (ewt@redhat.com)
*
* Copyright 1996 Red Hat Software
*
*/
#ifndef INIT_HEADERS
#include "init-libc-headers.h"
#else
#include INIT_HEADERS
#endif
#include "config-stage1.h"
#if defined(__powerpc__)
#define TIOCSCTTY 0x540
#endif
char * env[] = {
"PATH=/usr/bin:/bin:/sbin:/usr/sbin:/mnt/sbin:/mnt/usr/sbin:/mnt/bin:/mnt/usr/bin",
"LD_LIBRARY_PATH=/lib:/usr/lib:/mnt/lib:/mnt/usr/lib:/usr/X11R6/lib:/mnt/usr/X11R6/lib",
"HOME=/",
"TERM=linux",
"TERMINFO=/etc/terminfo",
NULL
};
/*
* this needs to handle the following cases:
*
* 1) run from a CD root filesystem
* 2) run from a read only nfs rooted filesystem
* 3) run from a floppy
* 4) run from a floppy that's been loaded into a ramdisk
*
*/
int testing;
int klog_pid;
void fatal_error(char *msg)
{
printf("FATAL ERROR IN INIT: %s\n\nI can't recover from this, please reboot manually and send bugreport.\n", msg);
while (1);
}
void print_error(char *msg)
{
printf("E: %s\n", msg);
}
void print_warning(char *msg)
{
printf("W: %s\n", msg);
}
void print_int_init(int fd, int i)
{
char buf[10];
char * chptr = buf + 9;
int j = 0;
if (i < 0)
{
write(1, "-", 1);
i = -1 * i;
}
while (i)
{
*chptr-- = '0' + (i % 10);
j++;
i = i / 10;
}
write(fd, chptr + 1, j);
}
void print_str_init(int fd, char * string)
{
write(fd, string, strlen(string));
}
/* fork to:
* (1) watch /proc/kmsg and copy the stuff to /dev/tty4
* (2) listens to /dev/log and copy also this stuff (log from programs)
*/
void doklog()
{
fd_set readset, unixs;
int in, out, i;
int log;
int s;
int sock = -1;
struct sockaddr_un sockaddr;
char buf[1024];
int readfd;
/* open kernel message logger */
in = open("/proc/kmsg", O_RDONLY,0);
if (in < 0) {
print_error("could not open /proc/kmsg");
return;
}
if ((log = open("/tmp/syslog", O_WRONLY | O_CREAT, 0644)) < 0) {
print_error("error opening /tmp/syslog");
sleep(5);
return;
}
if ((klog_pid = fork())) {
close(in);
close(log);
return;
} else {
close(0);
close(1);
close(2);
}
out = open("/dev/tty4", O_WRONLY, 0);
if (out < 0)
print_warning("couldn't open tty for syslog -- still using /tmp/syslog\n");
/* now open the syslog socket */
// ############# LINUX 2.4 /dev/log IS BUGGED! --> apparently the syslogs can't reach me, and it's full up after a while
// sockaddr.sun_family = AF_UNIX;
// strncpy(sockaddr.sun_path, "/dev/log", UNIX_PATH_MAX);
// sock = socket(AF_UNIX, SOCK_STREAM, 0);
// if (sock < 0) {
// printf("error creating socket: %d\n", errno);
// sleep(5);
// }
//
// print_str_init(log, "] got socket\n");
// if (bind(sock, (struct sockaddr *) &sockaddr, sizeof(sockaddr.sun_family) + strlen(sockaddr.sun_path))) {
// print_str_init(log, "] bind error: ");
// print_int_init(log, errno);
// print_str_init(log, "\n");
// sleep(// }
//
// print_str_init(log, "] bound socket\n");
// chmod("/dev/log", 0666);
// if (listen(sock, 5)) {
// print_str_init(log, "] listen error: ");
// print_int_init(log, errno);
// print_str_init(log, "\n");
// sleep(5);
// }
/* disable on-console syslog output */
syslog(8, NULL, 1);
print_str_init(log, "] kernel/system logger ok\n");
FD_ZERO(&unixs);
while (1) {
memcpy(&readset, &unixs, sizeof(unixs));
if (sock >= 0)
FD_SET(sock, &readset);
FD_SET(in, &readset);
i = select(20, &readset, NULL, NULL, NULL);
if (i <= 0)
continue;
/* has /proc/kmsg things to tell us? */
if (FD_ISSET(in, &readset)) {
i = read(in, buf, sizeof(buf));
if (i > 0) {
if (out >= 0)
write(out, buf, i);
write(log, buf, i);
}
}
/* examine some fd's in the hope to find some syslog outputs from programs */
for (readfd = 0; readfd < 20; ++readfd) {
if (FD_ISSET(readfd, &readset) && FD_ISSET(readfd, &unixs)) {
i = read(readfd, buf, sizeof(buf));
if (i > 0) {
/* grep out the output of RPM telling that it installed/removed some packages */
if (!strstr(buf, "mdk installed") && !strstr(buf, "mdk removed")) {
if (out >= 0)
write(out, buf, i);
write(log, buf, i);
}
} else if (i == 0) {
/* socket closed */
close(readfd);
FD_CLR(readfd, &unixs);
}
}
}
/* the socket has moved, new stuff to do */
if (sock >= 0 && FD_ISSET(sock, &readset)) {
s = sizeof(sockaddr);
readfd = accept(sock, (struct sockaddr *) &sockaddr, &s);
if (readfd < 0) {
char * msg_error = "] error in accept\n";
if (out >= 0)
write(out, msg_error, strlen(msg_error));
write(log, msg_error, strlen(msg_error));
close(sock);
sock = -1;
}
else
FD_SET(readfd, &unixs);
}
}
}
#define LOOP_CLR_FD 0x4C01
void del_loop(char *device)
{
int fd;
if ((fd = open(device, O_RDONLY, 0)) < 0) {
printf("del_loop open failed\n");
return;
}
if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
printf("del_loop ioctl failed");
return;
}
close(fd);
}
struct filesystem
{
char * dev;
char * name;
char * fs;
int mounted;
};
/* attempt to unmount all filesystems in /proc/mounts */
void unmount_filesystems(void)
{
int fd, size;
char buf[65535]; /* this should be big enough */
char *p;
struct filesystem fs[500];
int numfs = 0;
int i, nb;
printf("unmounting filesystems...\n");
fd = open("/proc/mounts", O_RDONLY, 0);
if (fd < 1) {
print_error("failed to open /proc/mounts");
sleep(2);
return;
}
size = read(fd, buf, sizeof(buf) - 1);
buf[size] = '\0';
close(fd);
p = buf;
while (*p) {
fs[numfs].mounted = 1;
fs[numfs].dev = p;
while (*p != ' ') p++;
*p++ = '\0';
fs[numfs].name = p;
while (*p != ' ') p++;
*p++ = '\0';
fs[numfs].fs = p;
while (*p != ' ') p++;
*p++ = '\0';
while (*p != '\n') p++;
p++;
if (strcmp(fs[numfs].name, "/") != 0) numfs++; /* skip if root, no need to take initrd root in account */
}
/* Pixel's ultra-optimized sorting algorithm:
multiple passes trying to umount everything until nothing moves
anymore (a.k.a holy shotgun method) */
do {
nb = 0;
for (i = 0; i < numfs; i++) {
/*printf("trying with %s\n", fs[i].name);*/
if (fs[i].mounted && umount(fs[i].name) == 0) {
if (strncmp(fs[i].dev + sizeof("/dev/") - 1, "loop",
sizeof("loop") - 1) == 0)
del_loop(fs[i].dev);
printf("\t%s\n", fs[i].name);
fs[i].mounted = 0;
nb++;
}
}
} while (nb);
for (i = nb = 0; i < numfs; i++)
if (fs[i].mounted) {
printf("\t%s umount failed\n", fs[i].name);
if (strcmp(fs[i].fs, "ext2") == 0) nb++; /* don't count not-ext2 umount failed */
}
if (nb) {
printf("failed to umount some filesystems\n");
while (1);
}
}
int exit_value_rescue = 66;
#define DEV_PERM 00400|00200|00040|00020
#define CHR_DEV 0020000|DEV_PERM
#define BLK_DEV 0060000|DEV_PERM
//static _syscall3(int,mknod,char *,a1,mode_t,a2,dev_t,a3)
int main(int argc, char **argv)
{
pid_t installpid, childpid;
int wait_status;
int fd;
int abnormal_termination = 0;
int end_stage2 = 0;
//char *argv2[4] = {"ls","-l","/dev/",0};
/* getpid() != 1 should work, by linuxrc tends to get a larger pid */
testing = (getpid() > 50);
/*
mknod("/dev/ram3", BLK_DEV, MKDEV(1,3));
mknod("/dev/fd0", BLK_DEV, MKDEV(2,0));
mknod("/dev/loop3", BLK_DEV, MKDEV(7,3));
mknod("/dev/mem", CHR_DEV, MKDEV(1,1));
mknod("/dev/null", CHR_DEV, MKDEV(1,3));
mknod("/dev/ptyp0", CHR_DEV, MKDEV(2,0));
mknod("/dev/ttyp0", CHR_DEV, MKDEV(3,0));
mknod("/dev/tty0", CHR_DEV, MKDEV(4,0));
mknod("/dev/tty1", CHR_DEV, MKDEV(4,1));
mknod("/dev/tty2", CHR_DEV, MKDEV(4,2));
mknod("/dev/tty3", CHR_DEV, MKDEV(4,3));
mknod("/dev/tty4", CHR_DEV, MKDEV(4,4));
mknod("/dev/tty5", CHR_DEV, MKDEV(4,5));
mknod("/dev/tty6", CHR_DEV, MKDEV(4,6));
mknod("/dev/tty7", CHR_DEV, MKDEV(4,7));
mknod("/dev/ttyS0", CHR_DEV, MKDEV(4,64));
mknod("/dev/console", CHR_DEV, MKDEV(5,1));
mknod("/dev/fb0", CHR_DEV, MKDEV(29,0));
mknod("/dev/ppp", CHR_DEV, MKDEV(108,0));
*/
//execve("/bin/ls",argv2,0);
if (!testing) {
/* turn off screen blanking */
printf("\033[9;0]");
printf("\033[8]");
}
else
printf("*** TESTING MODE ***\n");
printf("\n\t\t\t\033[1;40mWelcome to \033[1;36mALT Linux\033[0;39m\n\n");
if (!testing) {
if (mount("/proc", "/proc", "proc", 0, NULL))
fatal_error("Unable to mount proc filesystem");
}
/* ignore Control-C and keyboard stop signals */
signal(SIGINT, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
if (!testing) {
fd = open("/dev/tty1", O_RDWR, 0);
if (fd < 0)
/* try with devfs */
fd = open("/dev/vc/1", O_RDWR, 0);
if (fd < 0)
fatal_error("failed to open /dev/tty1 and /dev/vc/1");
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
}
/* I set me up as session leader (probably not necessary?) */
setsid();
if (ioctl(0, TIOCSCTTY, NULL))
print_error("could not set new controlling tty");
if (!testing) {
char my_hostname[] = "localhost.localdomain";
sethostname(my_hostname, sizeof(my_hostname));
/* the default domainname (as of 2.0.35) is "(none)", which confuses
glibc */
setdomainname("", 0);
}
if (!testing)
doklog();
/* Go into normal init mode - keep going, and then do a orderly shutdown
when:
1) install exits
2) we receive a SIGHUP
*/
printf("If more people were to meet doing raklets, this planet\n");
printf("would be a safer place.\n");
printf("\n");
printf("Running install...\n");
if (!(installpid = fork())) {
/* child */
char * child_argv[2];
child_argv[0] = "/sbin/stage1";
child_argv[1] = NULL;
execve(child_argv[0], child_argv, env);
printf("error in exec of stage1 :-(\n");
return 0;
}
while (!end_stage2) {
childpid = wait4(-1, &wait_status, 0, NULL);
if (childpid == installpid)
end_stage2 = 1;
}
if (!WIFEXITED(wait_status) || (WEXITSTATUS(wait_status) != 0 && WEXITSTATUS(wait_status) != exit_value_rescue)) {
printf("wait_status: %i, install exited abnormally :-( ", wait_status);
if (WIFSIGNALED(wait_status))
printf("-- received signal %d", WTERMSIG(wait_status));
printf("\n");
abnormal_termination = 1;
} else if (WIFEXITED(wait_status) && WEXITSTATUS(wait_status) == exit_value_rescue) {
kill(klog_pid, 9);
printf("exiting init -- giving hand to rescue\n");
return 0;
} else
printf("install succeeded\n");
if (testing)
return 0;
sync(); sync();
printf("sending termination signals...");
kill(-1, 15);
sleep(2);
printf("done\n");
printf("sending kill signals...");
kill(-1, 9);
sleep(2);
printf("done\n");
unmount_filesystems();
if (!abnormal_termination) {
printf("rebooting system\n");
sleep(2);
reboot(0xfee1dead, 672274793, 0x01234567);
} else {
printf("you may safely reboot your system\n");
while (1);
}
return 0;
}
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