Foo
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0460ff2e5d
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400
init.c
400
init.c
@ -37,40 +37,39 @@
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#include <sys/reboot.h>
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#include <sys/kdaemon.h>
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#include <sys/sysmacros.h>
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#include <linux/serial.h> /* for serial_struct */
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#include <sys/vt.h> /* for vt_stat */
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#include <linux/serial.h> /* for serial_struct */
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#include <sys/vt.h> /* for vt_stat */
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#include <sys/ioctl.h>
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#define DEBUG_INIT
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#define CONSOLE "/dev/console" /* Logical system console */
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#define VT_PRIMARY "/dev/tty0" /* Virtual console master */
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#define VT_SECONDARY "/dev/tty1" /* Virtual console master */
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#define VT_LOG "/dev/tty2" /* Virtual console master */
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#define SHELL "/bin/sh" /* Default shell */
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#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
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#define CONSOLE "/dev/console" /* Logical system console */
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#define VT_PRIMARY "/dev/tty0" /* Virtual console master */
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#define VT_SECONDARY "/dev/tty1" /* Virtual console master */
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#define VT_LOG "/dev/tty2" /* Virtual console master */
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#define SHELL "/bin/sh" /* Default shell */
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#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
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#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
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static int maxproclen=0;
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static char* argv0;
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static char* console = CONSOLE;
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static char* second_terminal = "/dev/tty2";
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static char* log = "/dev/tty3";
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static char *console = CONSOLE;
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static char *second_terminal = "/dev/tty2";
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static char *log = "/dev/tty3";
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/* try to open up the specified device */
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int device_open(char* device, int mode)
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int device_open(char *device, int mode)
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{
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int m, f, fd = -1;
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mode = m | O_NONBLOCK;
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/* Retry up to 5 times */
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for(f = 0; f < 5; f++)
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if ((fd = open(device, m)) >= 0) break;
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if (fd < 0) return fd;
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for (f = 0; f < 5; f++)
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if ((fd = open(device, m)) >= 0)
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break;
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if (fd < 0)
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return fd;
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/* Set original flags. */
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if (m != mode)
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fcntl(fd, F_SETFL, mode);
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@ -78,16 +77,18 @@ int device_open(char* device, int mode)
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}
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/* print a message to the specified device */
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void message(char* device, char *fmt, ...)
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void message(char *device, char *fmt, ...)
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{
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int fd;
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va_list arguments;
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if ((fd = device_open(device, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) {
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if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
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va_start(arguments, fmt);
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vdprintf(fd, fmt, arguments);
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va_end(arguments);
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}
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close( fd);
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close(fd);
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} else
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vprintf(fmt, arguments);
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}
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/* Set terminal settings to reasonable defaults */
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@ -96,74 +97,71 @@ void set_term()
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int fd;
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struct termios tty;
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if ((fd = device_open(console, O_RDWR|O_NOCTTY)) < 0) {
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message(log, "can't open %s", console);
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if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
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message(log, "can't open %s\n", console);
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return;
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}
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ioctl(fd, TCGETS, &tty);
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tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
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tty.c_cflag |= HUPCL|CLOCAL;
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tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
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tty.c_cflag |= HUPCL | CLOCAL;
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tty.c_cc[VINTR] = 3;
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tty.c_cc[VQUIT] = 28;
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tty.c_cc[VINTR] = 3;
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tty.c_cc[VQUIT] = 28;
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tty.c_cc[VERASE] = 127;
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tty.c_cc[VKILL] = 24;
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tty.c_cc[VEOF] = 4;
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tty.c_cc[VTIME] = 0;
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VKILL] = 24;
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tty.c_cc[VEOF] = 4;
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tty.c_cc[VTIME] = 0;
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VSTART] = 17;
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tty.c_cc[VSTOP] = 19;
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tty.c_cc[VSUSP] = 26;
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tty.c_cc[VSTOP] = 19;
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tty.c_cc[VSUSP] = 26;
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/* Set pre and post processing */
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tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
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tty.c_oflag = OPOST|ONLCR;
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tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
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tty.c_iflag = IGNPAR | ICRNL | IXON | IXANY;
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tty.c_oflag = OPOST | ONLCR;
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tty.c_lflag = ISIG | ICANON | ECHO | ECHOCTL | ECHOPRT | ECHOKE;
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/* Now set the terminal line. */
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ioctl(fd, TCSETS, &tty);
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close( fd);
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close(fd);
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}
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static int
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mem_total()
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static int mem_total()
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{
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char s[80];
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char *p;
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FILE *f;
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const char pattern[]="MemTotal:";
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const char pattern[] = "MemTotal:";
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f=fopen("/proc/meminfo","r");
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while (NULL != fgets(s,79,f)) {
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p=strstr(s, pattern);
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f = fopen("/proc/meminfo", "r");
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while (NULL != fgets(s, 79, f)) {
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p = strstr(s, pattern);
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if (NULL != p) {
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fclose(f);
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return(atoi(p+strlen(pattern)));
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return (atoi(p + strlen(pattern)));
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}
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}
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return -1;
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}
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static void
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set_free_pages()
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static void set_free_pages()
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{
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char s[80];
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FILE *f;
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f=fopen("/proc/sys/vm/freepages","r");
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fgets(s,79,f);
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f = fopen("/proc/sys/vm/freepages", "r");
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fgets(s, 79, f);
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if (atoi(s) < 32) {
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fclose(f);
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f=fopen("/proc/sys/vm/freepages","w");
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fprintf(f,"30\t40\t50\n");
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f = fopen("/proc/sys/vm/freepages", "w");
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fprintf(f, "30\t40\t50\n");
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printf("\nIncreased /proc/sys/vm/freepages values to 30/40/50\n");
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}
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fclose(f);
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}
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static void
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console_init()
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static void console_init()
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{
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int fd;
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int tried_devcons = 0;
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@ -176,7 +174,7 @@ console_init()
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console = CONSOLE;
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tried_devcons++;
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}
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while ((fd = open(console, O_RDONLY|O_NONBLOCK)) < 0) {
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while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
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if (!tried_devcons) {
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tried_devcons++;
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console = CONSOLE;
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@ -195,41 +193,41 @@ console_init()
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close(fd);
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}
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static int
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waitfor(int pid)
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static int waitfor(int pid)
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{
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int status, wpid;
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message(log, "Waiting for process %d.\n", pid);
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while ( (wpid = wait(&status)) != pid ) {
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if ( wpid > 0 )
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message(log,"pid %d exited, status=%x.\n", wpid, status);
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while ((wpid = wait(&status)) != pid) {
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if (wpid > 0)
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message(log, "pid %d exited, status=%x.\n", wpid, status);
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}
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return wpid;
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}
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static int
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run(const char* command, char* terminal, int get_enter)
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static int run(const char *command, char *terminal, int get_enter)
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{
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int f, pid;
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int f, pid;
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char *args[16];
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char buf[256];
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char* ptr;
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static const char press_enter[] =
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char *ptr;
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static const char press_enter[] =
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"\nPlease press Enter to activate this console. ";
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/* Make a proper command from the command string */
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/* Make a proper command from the command string */
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strcpy(buf, command);
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ptr = buf;
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for(f = 1; f < 15; f++) {
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for (f = 1; f < 15; f++) {
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/* Skip white space */
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while(*ptr == ' ' || *ptr == '\t') ptr++;
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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args[f] = ptr;
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/* May be trailing space.. */
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if (*ptr == 0) break;
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if (*ptr == 0)
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break;
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/* Skip this `word' */
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while(*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
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while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
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ptr++;
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/* If end-of-line, break */
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if (*ptr == '#' || *ptr == 0) {
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@ -241,7 +239,7 @@ run(const char* command, char* terminal, int get_enter)
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args[f] = NULL;
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}
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args[0] = args[1];
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if ((pid = fork()) == 0) {
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/* Clean up */
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@ -250,8 +248,8 @@ run(const char* command, char* terminal, int get_enter)
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close(2);
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setsid();
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if ((f = device_open(terminal, O_RDWR|O_NOCTTY)) < 0) {
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message( log, "open(%s) failed: %s", terminal, strerror(errno));
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if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
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message(log, "open(%s) failed: %s\n", terminal, strerror(errno));
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return -1;
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}
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dup(f);
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@ -259,7 +257,7 @@ run(const char* command, char* terminal, int get_enter)
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tcsetpgrp(0, getpgrp());
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set_term();
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if ( get_enter ) {
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if (get_enter) {
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/*
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* Save memory by not exec-ing anything large (like a shell)
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* before the user wants it. This is critical if swap is not
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@ -268,18 +266,21 @@ run(const char* command, char* terminal, int get_enter)
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* be allowed to start a shell or whatever an init script
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* specifies.
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*/
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char c;
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char c;
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write(1, press_enter, sizeof(press_enter) - 1);
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read(0, &c, 1);
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message(console, "Got an enter\r\n");
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}
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/* Log the process name and args */
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message(log, "Executing '%s'\n", command);
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message(console, "Executing ");
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message(console, "'%s'\r\n", command);
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/* Now run it. This should take over the PID, so nothing
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* further in init.c should be run by this PID. */
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execvp(args[1], args + 1);
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message(console, "Hmm. Trying as a script.\r\n");
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/* If shell scripts are not executed, force the issue */
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if (errno == ENOEXEC) {
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char buf[256];
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@ -291,18 +292,17 @@ run(const char* command, char* terminal, int get_enter)
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args[4] = NULL;
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execvp(args[1], args + 1);
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}
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message(log, "Could not execute '%s'\n", command, strerror(errno));
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message(console, "Could not execute '%s'\n", command);
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exit(-1);
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}
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return pid;
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}
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#ifndef DEBUG_INIT
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static void
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shutdown_system(void)
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static void shutdown_system(void)
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{
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message(console, "The system is going down NOW !!");
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message(console, "The system is going down NOW !!\r\n");
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sync();
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/* Allow Ctrl-Alt-Del to reboot system. */
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reboot(RB_ENABLE_CAD);
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@ -318,169 +318,151 @@ shutdown_system(void)
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waitfor(run("/bin/swapoff -a", console, 0));
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waitfor(run("/bin/umount -a -n", console, 0));
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sync();
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if (get_kernel_revision() <= 2*65536+2*256+11) {
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if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) {
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/* Removed bdflush call, kupdate in kernels >2.2.11 */
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bdflush(1, 0);
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sync();
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}
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}
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static void
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halt_signal(int sig)
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static void halt_signal(int sig)
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{
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shutdown_system();
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message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
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reboot( RB_POWER_OFF);
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message(console,
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"The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
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reboot(RB_POWER_OFF);
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exit(0);
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}
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static void
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reboot_signal(int sig)
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static void reboot_signal(int sig)
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{
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shutdown_system();
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message(console, "Please stand by while rebooting the system.\r\n");
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reboot( RB_AUTOBOOT);
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reboot(RB_AUTOBOOT);
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exit(0);
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}
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#endif
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int setproctitle(char *fmt, ...)
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extern int init_main(int argc, char **argv)
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{
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va_list ap;
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int len;
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char buf[256];
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buf[0] = 0;
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va_start(ap, fmt);
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len = vsprintf(buf, fmt, ap);
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va_end(ap);
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memset(argv0, 0, maxproclen + 1);
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strncpy(argv0, buf, maxproclen);
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return len;
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}
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extern int
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init_main(int argc, char * * argv)
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{
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int run_rc = TRUE;
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int pid1 = 0;
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int pid2 = 0;
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struct stat statbuf;
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const char* init_commands = SHELL "-c exec " INITSCRIPT;
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const char* shell_commands = SHELL;
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const char* tty0_commands = init_commands;
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const char* tty1_commands = shell_commands;
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const char* no_memory =
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"Sorry, your computer does not have enough memory.\n";
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/* For later use */
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argv0 = argv[0];
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maxproclen = strlen(argv[0]);
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setproctitle("init [boot]");
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int run_rc = TRUE;
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int pid1 = 0;
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int pid2 = 0;
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struct stat statbuf;
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const char *init_commands = SHELL "-c exec " INITSCRIPT;
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const char *shell_commands = SHELL;
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const char *tty0_commands = init_commands;
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const char *tty1_commands = shell_commands;
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char *hello_msg_format =
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"init started: BusyBox v%s (%s) multi-call binary\r\n";
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const char *no_memory =
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"Sorry, your computer does not have enough memory.\r\n";
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#ifndef DEBUG_INIT
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/* Set up sig handlers */
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signal(SIGUSR1, halt_signal);
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signal(SIGSEGV, halt_signal);
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signal(SIGPWR, halt_signal);
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signal(SIGALRM, halt_signal);
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signal(SIGHUP, halt_signal);
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signal(SIGUSR2, reboot_signal);
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signal(SIGINT, reboot_signal);
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signal(SIGTERM, reboot_signal);
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/* Set up sig handlers */
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signal(SIGUSR1, halt_signal);
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signal(SIGSEGV, halt_signal);
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signal(SIGPWR, halt_signal);
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signal(SIGALRM, halt_signal);
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signal(SIGHUP, halt_signal);
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signal(SIGUSR2, reboot_signal);
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signal(SIGINT, reboot_signal);
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signal(SIGTERM, reboot_signal);
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#endif
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/* Figure out where the default console should be */
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console_init();
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/* Figure out where the default console should be */
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console_init();
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/* Turn off rebooting via CTL-ALT-DEL -- we get a
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* SIGINT on CAD so we can shut things down gracefully... */
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/* Turn off rebooting via CTL-ALT-DEL -- we get a
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* SIGINT on CAD so we can shut things down gracefully... */
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#ifndef DEBUG_INIT
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reboot(RB_DISABLE_CAD);
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reboot(RB_DISABLE_CAD);
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#endif
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/* Close whatever files are open, and reset the console. */
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close(0);
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close(1);
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close(2);
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set_term();
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setsid();
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/* Close whatever files are open, and reset the console. */
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close(0);
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close(1);
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close(2);
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set_term();
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setsid();
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/* Make sure PATH is set to something sane */
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if (getenv("PATH") == NULL)
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putenv(PATH_DEFAULT);
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/* Make sure PATH is set to something sane */
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if (getenv("PATH") == NULL)
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putenv(PATH_DEFAULT);
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/* Hello world */
|
||||
message(console, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
message(log, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
/* Hello world */
|
||||
message(log, hello_msg_format, BB_VER, BB_BT);
|
||||
message(console, hello_msg_format, BB_VER, BB_BT);
|
||||
|
||||
/* Mount /proc */
|
||||
if (mount("/proc", "/proc", "proc", 0, 0)) {
|
||||
message(log, "Mounting /proc: failed!\n");
|
||||
message(console, "Mounting /proc: failed!\r\n");
|
||||
} else {
|
||||
message(console, "Mounting /proc: done.\r\n");
|
||||
}
|
||||
|
||||
/* Mount /proc */
|
||||
message(console, "Mounting /proc: \n");
|
||||
if (mount("/proc","/proc","proc",0,0)) {
|
||||
message(log, "%s: could not mount /proc!\n", argv[0]);
|
||||
message(console, "failed!\n");
|
||||
}
|
||||
message(console, "done.\n");
|
||||
|
||||
|
||||
/* Make sure there is enough memory to do something useful*/
|
||||
set_free_pages();
|
||||
if (mem_total() < 2000) {
|
||||
int retval;
|
||||
retval= stat("/etc/fstab",&statbuf);
|
||||
if (retval) {
|
||||
/* Make sure there is enough memory to do something useful */
|
||||
set_free_pages();
|
||||
if (mem_total() < 2000) {
|
||||
int retval;
|
||||
retval = stat("/etc/fstab", &statbuf);
|
||||
if (retval) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Check if we are supposed to be in single user mode */
|
||||
if (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1")) {
|
||||
run_rc = FALSE;
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = 0;
|
||||
setproctitle("init [S]");
|
||||
} else {
|
||||
setproctitle("init [1]");
|
||||
/* Check if we are supposed to be in single user mode */
|
||||
if ( argc > 1 && (!strcmp(argv[1], "single") ||
|
||||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
|
||||
run_rc = FALSE;
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = 0;
|
||||
}
|
||||
|
||||
/* Make sure an init script exists before trying to run it */
|
||||
if (run_rc == TRUE && stat(INITSCRIPT, &statbuf)) {
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = shell_commands;
|
||||
}
|
||||
|
||||
/* Ok, now launch the rc script and/or prepare to
|
||||
* start up some VTs if somebody hits enter...
|
||||
*/
|
||||
for (;;) {
|
||||
int wpid;
|
||||
int status;
|
||||
|
||||
if (pid1 == 0 && tty0_commands) {
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
|
||||
/* Make sure an init script exists before trying to run it */
|
||||
if ( run_rc == TRUE && stat( INITSCRIPT, &statbuf)) {
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = shell_commands;
|
||||
}
|
||||
|
||||
/* Ok, now launch the rc script and/or prepare to
|
||||
* start up some VTs if somebody hits enter...
|
||||
*/
|
||||
for ( ; ; ) {
|
||||
int wpid;
|
||||
int status;
|
||||
|
||||
if ( pid1 == 0 && *tty0_commands ) {
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
if ( pid2 == 0 && *tty1_commands ) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
}
|
||||
wpid = wait(&status);
|
||||
if ( wpid > 0 && wpid != pid1) {
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
if ( wpid == pid2 ) {
|
||||
pid2 = 0;
|
||||
}
|
||||
sleep(1);
|
||||
if (pid2 == 0 && tty1_commands) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
}
|
||||
wpid = wait(&status);
|
||||
if (wpid > 0 && wpid != pid1) {
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
/* Don't respawn an init script if it exits */
|
||||
if (run_rc == FALSE && wpid == pid1) {
|
||||
pid1 = 0;
|
||||
}
|
||||
if (wpid == pid2) {
|
||||
pid2 = 0;
|
||||
}
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
|
||||
|
400
init/init.c
400
init/init.c
@ -37,40 +37,39 @@
|
||||
#include <sys/reboot.h>
|
||||
#include <sys/kdaemon.h>
|
||||
#include <sys/sysmacros.h>
|
||||
#include <linux/serial.h> /* for serial_struct */
|
||||
#include <sys/vt.h> /* for vt_stat */
|
||||
#include <linux/serial.h> /* for serial_struct */
|
||||
#include <sys/vt.h> /* for vt_stat */
|
||||
#include <sys/ioctl.h>
|
||||
|
||||
#define DEBUG_INIT
|
||||
|
||||
#define CONSOLE "/dev/console" /* Logical system console */
|
||||
#define VT_PRIMARY "/dev/tty0" /* Virtual console master */
|
||||
#define VT_SECONDARY "/dev/tty1" /* Virtual console master */
|
||||
#define VT_LOG "/dev/tty2" /* Virtual console master */
|
||||
#define SHELL "/bin/sh" /* Default shell */
|
||||
#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
|
||||
#define CONSOLE "/dev/console" /* Logical system console */
|
||||
#define VT_PRIMARY "/dev/tty0" /* Virtual console master */
|
||||
#define VT_SECONDARY "/dev/tty1" /* Virtual console master */
|
||||
#define VT_LOG "/dev/tty2" /* Virtual console master */
|
||||
#define SHELL "/bin/sh" /* Default shell */
|
||||
#define INITSCRIPT "/etc/init.d/rcS" /* Initscript. */
|
||||
#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
|
||||
|
||||
static int maxproclen=0;
|
||||
static char* argv0;
|
||||
|
||||
static char* console = CONSOLE;
|
||||
static char* second_terminal = "/dev/tty2";
|
||||
static char* log = "/dev/tty3";
|
||||
static char *console = CONSOLE;
|
||||
static char *second_terminal = "/dev/tty2";
|
||||
static char *log = "/dev/tty3";
|
||||
|
||||
|
||||
|
||||
/* try to open up the specified device */
|
||||
int device_open(char* device, int mode)
|
||||
int device_open(char *device, int mode)
|
||||
{
|
||||
int m, f, fd = -1;
|
||||
|
||||
|
||||
mode = m | O_NONBLOCK;
|
||||
|
||||
|
||||
/* Retry up to 5 times */
|
||||
for(f = 0; f < 5; f++)
|
||||
if ((fd = open(device, m)) >= 0) break;
|
||||
if (fd < 0) return fd;
|
||||
for (f = 0; f < 5; f++)
|
||||
if ((fd = open(device, m)) >= 0)
|
||||
break;
|
||||
if (fd < 0)
|
||||
return fd;
|
||||
/* Set original flags. */
|
||||
if (m != mode)
|
||||
fcntl(fd, F_SETFL, mode);
|
||||
@ -78,16 +77,18 @@ int device_open(char* device, int mode)
|
||||
}
|
||||
|
||||
/* print a message to the specified device */
|
||||
void message(char* device, char *fmt, ...)
|
||||
void message(char *device, char *fmt, ...)
|
||||
{
|
||||
int fd;
|
||||
va_list arguments;
|
||||
if ((fd = device_open(device, O_WRONLY|O_NOCTTY|O_NDELAY)) >= 0) {
|
||||
|
||||
if ((fd = device_open(device, O_WRONLY | O_NOCTTY | O_NDELAY)) >= 0) {
|
||||
va_start(arguments, fmt);
|
||||
vdprintf(fd, fmt, arguments);
|
||||
va_end(arguments);
|
||||
}
|
||||
close( fd);
|
||||
close(fd);
|
||||
} else
|
||||
vprintf(fmt, arguments);
|
||||
}
|
||||
|
||||
/* Set terminal settings to reasonable defaults */
|
||||
@ -96,74 +97,71 @@ void set_term()
|
||||
int fd;
|
||||
struct termios tty;
|
||||
|
||||
if ((fd = device_open(console, O_RDWR|O_NOCTTY)) < 0) {
|
||||
message(log, "can't open %s", console);
|
||||
if ((fd = device_open(console, O_RDWR | O_NOCTTY)) < 0) {
|
||||
message(log, "can't open %s\n", console);
|
||||
return;
|
||||
}
|
||||
ioctl(fd, TCGETS, &tty);
|
||||
tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
|
||||
tty.c_cflag |= HUPCL|CLOCAL;
|
||||
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
|
||||
tty.c_cflag |= HUPCL | CLOCAL;
|
||||
|
||||
tty.c_cc[VINTR] = 3;
|
||||
tty.c_cc[VQUIT] = 28;
|
||||
tty.c_cc[VINTR] = 3;
|
||||
tty.c_cc[VQUIT] = 28;
|
||||
tty.c_cc[VERASE] = 127;
|
||||
tty.c_cc[VKILL] = 24;
|
||||
tty.c_cc[VEOF] = 4;
|
||||
tty.c_cc[VTIME] = 0;
|
||||
tty.c_cc[VMIN] = 1;
|
||||
tty.c_cc[VKILL] = 24;
|
||||
tty.c_cc[VEOF] = 4;
|
||||
tty.c_cc[VTIME] = 0;
|
||||
tty.c_cc[VMIN] = 1;
|
||||
tty.c_cc[VSTART] = 17;
|
||||
tty.c_cc[VSTOP] = 19;
|
||||
tty.c_cc[VSUSP] = 26;
|
||||
tty.c_cc[VSTOP] = 19;
|
||||
tty.c_cc[VSUSP] = 26;
|
||||
|
||||
/* Set pre and post processing */
|
||||
tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
|
||||
tty.c_oflag = OPOST|ONLCR;
|
||||
tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
|
||||
tty.c_iflag = IGNPAR | ICRNL | IXON | IXANY;
|
||||
tty.c_oflag = OPOST | ONLCR;
|
||||
tty.c_lflag = ISIG | ICANON | ECHO | ECHOCTL | ECHOPRT | ECHOKE;
|
||||
|
||||
/* Now set the terminal line. */
|
||||
ioctl(fd, TCSETS, &tty);
|
||||
close( fd);
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static int
|
||||
mem_total()
|
||||
static int mem_total()
|
||||
{
|
||||
char s[80];
|
||||
char *p;
|
||||
FILE *f;
|
||||
const char pattern[]="MemTotal:";
|
||||
const char pattern[] = "MemTotal:";
|
||||
|
||||
f=fopen("/proc/meminfo","r");
|
||||
while (NULL != fgets(s,79,f)) {
|
||||
p=strstr(s, pattern);
|
||||
f = fopen("/proc/meminfo", "r");
|
||||
while (NULL != fgets(s, 79, f)) {
|
||||
p = strstr(s, pattern);
|
||||
if (NULL != p) {
|
||||
fclose(f);
|
||||
return(atoi(p+strlen(pattern)));
|
||||
return (atoi(p + strlen(pattern)));
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static void
|
||||
set_free_pages()
|
||||
static void set_free_pages()
|
||||
{
|
||||
char s[80];
|
||||
FILE *f;
|
||||
|
||||
f=fopen("/proc/sys/vm/freepages","r");
|
||||
fgets(s,79,f);
|
||||
f = fopen("/proc/sys/vm/freepages", "r");
|
||||
fgets(s, 79, f);
|
||||
if (atoi(s) < 32) {
|
||||
fclose(f);
|
||||
f=fopen("/proc/sys/vm/freepages","w");
|
||||
fprintf(f,"30\t40\t50\n");
|
||||
f = fopen("/proc/sys/vm/freepages", "w");
|
||||
fprintf(f, "30\t40\t50\n");
|
||||
printf("\nIncreased /proc/sys/vm/freepages values to 30/40/50\n");
|
||||
}
|
||||
fclose(f);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
console_init()
|
||||
static void console_init()
|
||||
{
|
||||
int fd;
|
||||
int tried_devcons = 0;
|
||||
@ -176,7 +174,7 @@ console_init()
|
||||
console = CONSOLE;
|
||||
tried_devcons++;
|
||||
}
|
||||
while ((fd = open(console, O_RDONLY|O_NONBLOCK)) < 0) {
|
||||
while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
|
||||
if (!tried_devcons) {
|
||||
tried_devcons++;
|
||||
console = CONSOLE;
|
||||
@ -195,41 +193,41 @@ console_init()
|
||||
close(fd);
|
||||
}
|
||||
|
||||
static int
|
||||
waitfor(int pid)
|
||||
static int waitfor(int pid)
|
||||
{
|
||||
int status, wpid;
|
||||
|
||||
message(log, "Waiting for process %d.\n", pid);
|
||||
while ( (wpid = wait(&status)) != pid ) {
|
||||
if ( wpid > 0 )
|
||||
message(log,"pid %d exited, status=%x.\n", wpid, status);
|
||||
while ((wpid = wait(&status)) != pid) {
|
||||
if (wpid > 0)
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
return wpid;
|
||||
}
|
||||
|
||||
static int
|
||||
run(const char* command, char* terminal, int get_enter)
|
||||
static int run(const char *command, char *terminal, int get_enter)
|
||||
{
|
||||
int f, pid;
|
||||
int f, pid;
|
||||
char *args[16];
|
||||
char buf[256];
|
||||
char* ptr;
|
||||
static const char press_enter[] =
|
||||
char *ptr;
|
||||
static const char press_enter[] =
|
||||
"\nPlease press Enter to activate this console. ";
|
||||
|
||||
|
||||
/* Make a proper command from the command string */
|
||||
|
||||
/* Make a proper command from the command string */
|
||||
strcpy(buf, command);
|
||||
ptr = buf;
|
||||
for(f = 1; f < 15; f++) {
|
||||
for (f = 1; f < 15; f++) {
|
||||
/* Skip white space */
|
||||
while(*ptr == ' ' || *ptr == '\t') ptr++;
|
||||
while (*ptr == ' ' || *ptr == '\t')
|
||||
ptr++;
|
||||
args[f] = ptr;
|
||||
/* May be trailing space.. */
|
||||
if (*ptr == 0) break;
|
||||
if (*ptr == 0)
|
||||
break;
|
||||
/* Skip this `word' */
|
||||
while(*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
|
||||
while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#')
|
||||
ptr++;
|
||||
/* If end-of-line, break */
|
||||
if (*ptr == '#' || *ptr == 0) {
|
||||
@ -241,7 +239,7 @@ run(const char* command, char* terminal, int get_enter)
|
||||
args[f] = NULL;
|
||||
}
|
||||
args[0] = args[1];
|
||||
|
||||
|
||||
|
||||
if ((pid = fork()) == 0) {
|
||||
/* Clean up */
|
||||
@ -250,8 +248,8 @@ run(const char* command, char* terminal, int get_enter)
|
||||
close(2);
|
||||
setsid();
|
||||
|
||||
if ((f = device_open(terminal, O_RDWR|O_NOCTTY)) < 0) {
|
||||
message( log, "open(%s) failed: %s", terminal, strerror(errno));
|
||||
if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
|
||||
message(log, "open(%s) failed: %s\n", terminal, strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
dup(f);
|
||||
@ -259,7 +257,7 @@ run(const char* command, char* terminal, int get_enter)
|
||||
tcsetpgrp(0, getpgrp());
|
||||
set_term();
|
||||
|
||||
if ( get_enter ) {
|
||||
if (get_enter) {
|
||||
/*
|
||||
* Save memory by not exec-ing anything large (like a shell)
|
||||
* before the user wants it. This is critical if swap is not
|
||||
@ -268,18 +266,21 @@ run(const char* command, char* terminal, int get_enter)
|
||||
* be allowed to start a shell or whatever an init script
|
||||
* specifies.
|
||||
*/
|
||||
char c;
|
||||
char c;
|
||||
write(1, press_enter, sizeof(press_enter) - 1);
|
||||
read(0, &c, 1);
|
||||
message(console, "Got an enter\r\n");
|
||||
}
|
||||
|
||||
/* Log the process name and args */
|
||||
message(log, "Executing '%s'\n", command);
|
||||
message(console, "Executing ");
|
||||
message(console, "'%s'\r\n", command);
|
||||
|
||||
/* Now run it. This should take over the PID, so nothing
|
||||
* further in init.c should be run by this PID. */
|
||||
execvp(args[1], args + 1);
|
||||
|
||||
message(console, "Hmm. Trying as a script.\r\n");
|
||||
/* If shell scripts are not executed, force the issue */
|
||||
if (errno == ENOEXEC) {
|
||||
char buf[256];
|
||||
@ -291,18 +292,17 @@ run(const char* command, char* terminal, int get_enter)
|
||||
args[4] = NULL;
|
||||
execvp(args[1], args + 1);
|
||||
}
|
||||
message(log, "Could not execute '%s'\n", command, strerror(errno));
|
||||
message(console, "Could not execute '%s'\n", command);
|
||||
exit(-1);
|
||||
}
|
||||
return pid;
|
||||
}
|
||||
|
||||
#ifndef DEBUG_INIT
|
||||
static void
|
||||
shutdown_system(void)
|
||||
static void shutdown_system(void)
|
||||
{
|
||||
|
||||
message(console, "The system is going down NOW !!");
|
||||
message(console, "The system is going down NOW !!\r\n");
|
||||
sync();
|
||||
/* Allow Ctrl-Alt-Del to reboot system. */
|
||||
reboot(RB_ENABLE_CAD);
|
||||
@ -318,169 +318,151 @@ shutdown_system(void)
|
||||
waitfor(run("/bin/swapoff -a", console, 0));
|
||||
waitfor(run("/bin/umount -a -n", console, 0));
|
||||
sync();
|
||||
if (get_kernel_revision() <= 2*65536+2*256+11) {
|
||||
if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) {
|
||||
/* Removed bdflush call, kupdate in kernels >2.2.11 */
|
||||
bdflush(1, 0);
|
||||
sync();
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
halt_signal(int sig)
|
||||
static void halt_signal(int sig)
|
||||
{
|
||||
shutdown_system();
|
||||
message(console, "The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
|
||||
reboot( RB_POWER_OFF);
|
||||
message(console,
|
||||
"The system is halted. Press CTRL-ALT-DEL or turn off power\r\n");
|
||||
reboot(RB_POWER_OFF);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
static void
|
||||
reboot_signal(int sig)
|
||||
static void reboot_signal(int sig)
|
||||
{
|
||||
shutdown_system();
|
||||
message(console, "Please stand by while rebooting the system.\r\n");
|
||||
reboot( RB_AUTOBOOT);
|
||||
reboot(RB_AUTOBOOT);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
int setproctitle(char *fmt, ...)
|
||||
extern int init_main(int argc, char **argv)
|
||||
{
|
||||
va_list ap;
|
||||
int len;
|
||||
char buf[256];
|
||||
|
||||
buf[0] = 0;
|
||||
va_start(ap, fmt);
|
||||
len = vsprintf(buf, fmt, ap);
|
||||
va_end(ap);
|
||||
memset(argv0, 0, maxproclen + 1);
|
||||
strncpy(argv0, buf, maxproclen);
|
||||
return len;
|
||||
}
|
||||
|
||||
extern int
|
||||
init_main(int argc, char * * argv)
|
||||
{
|
||||
int run_rc = TRUE;
|
||||
int pid1 = 0;
|
||||
int pid2 = 0;
|
||||
struct stat statbuf;
|
||||
const char* init_commands = SHELL "-c exec " INITSCRIPT;
|
||||
const char* shell_commands = SHELL;
|
||||
const char* tty0_commands = init_commands;
|
||||
const char* tty1_commands = shell_commands;
|
||||
const char* no_memory =
|
||||
"Sorry, your computer does not have enough memory.\n";
|
||||
|
||||
/* For later use */
|
||||
argv0 = argv[0];
|
||||
maxproclen = strlen(argv[0]);
|
||||
setproctitle("init [boot]");
|
||||
int run_rc = TRUE;
|
||||
int pid1 = 0;
|
||||
int pid2 = 0;
|
||||
struct stat statbuf;
|
||||
const char *init_commands = SHELL "-c exec " INITSCRIPT;
|
||||
const char *shell_commands = SHELL;
|
||||
const char *tty0_commands = init_commands;
|
||||
const char *tty1_commands = shell_commands;
|
||||
char *hello_msg_format =
|
||||
"init started: BusyBox v%s (%s) multi-call binary\r\n";
|
||||
const char *no_memory =
|
||||
"Sorry, your computer does not have enough memory.\r\n";
|
||||
|
||||
|
||||
#ifndef DEBUG_INIT
|
||||
/* Set up sig handlers */
|
||||
signal(SIGUSR1, halt_signal);
|
||||
signal(SIGSEGV, halt_signal);
|
||||
signal(SIGPWR, halt_signal);
|
||||
signal(SIGALRM, halt_signal);
|
||||
signal(SIGHUP, halt_signal);
|
||||
signal(SIGUSR2, reboot_signal);
|
||||
signal(SIGINT, reboot_signal);
|
||||
signal(SIGTERM, reboot_signal);
|
||||
/* Set up sig handlers */
|
||||
signal(SIGUSR1, halt_signal);
|
||||
signal(SIGSEGV, halt_signal);
|
||||
signal(SIGPWR, halt_signal);
|
||||
signal(SIGALRM, halt_signal);
|
||||
signal(SIGHUP, halt_signal);
|
||||
signal(SIGUSR2, reboot_signal);
|
||||
signal(SIGINT, reboot_signal);
|
||||
signal(SIGTERM, reboot_signal);
|
||||
#endif
|
||||
/* Figure out where the default console should be */
|
||||
console_init();
|
||||
/* Figure out where the default console should be */
|
||||
console_init();
|
||||
|
||||
/* Turn off rebooting via CTL-ALT-DEL -- we get a
|
||||
* SIGINT on CAD so we can shut things down gracefully... */
|
||||
/* Turn off rebooting via CTL-ALT-DEL -- we get a
|
||||
* SIGINT on CAD so we can shut things down gracefully... */
|
||||
#ifndef DEBUG_INIT
|
||||
reboot(RB_DISABLE_CAD);
|
||||
reboot(RB_DISABLE_CAD);
|
||||
#endif
|
||||
|
||||
/* Close whatever files are open, and reset the console. */
|
||||
close(0);
|
||||
close(1);
|
||||
close(2);
|
||||
set_term();
|
||||
setsid();
|
||||
/* Close whatever files are open, and reset the console. */
|
||||
close(0);
|
||||
close(1);
|
||||
close(2);
|
||||
set_term();
|
||||
setsid();
|
||||
|
||||
/* Make sure PATH is set to something sane */
|
||||
if (getenv("PATH") == NULL)
|
||||
putenv(PATH_DEFAULT);
|
||||
/* Make sure PATH is set to something sane */
|
||||
if (getenv("PATH") == NULL)
|
||||
putenv(PATH_DEFAULT);
|
||||
|
||||
/* Hello world */
|
||||
message(console, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
message(log, "%s started: BusyBox v%s (%s) multi-call binary",
|
||||
argv[0], BB_VER, BB_BT);
|
||||
/* Hello world */
|
||||
message(log, hello_msg_format, BB_VER, BB_BT);
|
||||
message(console, hello_msg_format, BB_VER, BB_BT);
|
||||
|
||||
/* Mount /proc */
|
||||
if (mount("/proc", "/proc", "proc", 0, 0)) {
|
||||
message(log, "Mounting /proc: failed!\n");
|
||||
message(console, "Mounting /proc: failed!\r\n");
|
||||
} else {
|
||||
message(console, "Mounting /proc: done.\r\n");
|
||||
}
|
||||
|
||||
/* Mount /proc */
|
||||
message(console, "Mounting /proc: \n");
|
||||
if (mount("/proc","/proc","proc",0,0)) {
|
||||
message(log, "%s: could not mount /proc!\n", argv[0]);
|
||||
message(console, "failed!\n");
|
||||
}
|
||||
message(console, "done.\n");
|
||||
|
||||
|
||||
/* Make sure there is enough memory to do something useful*/
|
||||
set_free_pages();
|
||||
if (mem_total() < 2000) {
|
||||
int retval;
|
||||
retval= stat("/etc/fstab",&statbuf);
|
||||
if (retval) {
|
||||
/* Make sure there is enough memory to do something useful */
|
||||
set_free_pages();
|
||||
if (mem_total() < 2000) {
|
||||
int retval;
|
||||
retval = stat("/etc/fstab", &statbuf);
|
||||
if (retval) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
while (1) { sleep(1);}
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Check if we are supposed to be in single user mode */
|
||||
if (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || !strcmp(argv[1], "1")) {
|
||||
run_rc = FALSE;
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = 0;
|
||||
setproctitle("init [S]");
|
||||
} else {
|
||||
setproctitle("init [1]");
|
||||
/* Check if we are supposed to be in single user mode */
|
||||
if ( argc > 1 && (!strcmp(argv[1], "single") ||
|
||||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
|
||||
run_rc = FALSE;
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = 0;
|
||||
}
|
||||
|
||||
/* Make sure an init script exists before trying to run it */
|
||||
if (run_rc == TRUE && stat(INITSCRIPT, &statbuf)) {
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = shell_commands;
|
||||
}
|
||||
|
||||
/* Ok, now launch the rc script and/or prepare to
|
||||
* start up some VTs if somebody hits enter...
|
||||
*/
|
||||
for (;;) {
|
||||
int wpid;
|
||||
int status;
|
||||
|
||||
if (pid1 == 0 && tty0_commands) {
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
|
||||
/* Make sure an init script exists before trying to run it */
|
||||
if ( run_rc == TRUE && stat( INITSCRIPT, &statbuf)) {
|
||||
tty0_commands = shell_commands;
|
||||
tty1_commands = shell_commands;
|
||||
}
|
||||
|
||||
/* Ok, now launch the rc script and/or prepare to
|
||||
* start up some VTs if somebody hits enter...
|
||||
*/
|
||||
for ( ; ; ) {
|
||||
int wpid;
|
||||
int status;
|
||||
|
||||
if ( pid1 == 0 && *tty0_commands ) {
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
if ( pid2 == 0 && *tty1_commands ) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
}
|
||||
wpid = wait(&status);
|
||||
if ( wpid > 0 && wpid != pid1) {
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
if ( wpid == pid2 ) {
|
||||
pid2 = 0;
|
||||
}
|
||||
sleep(1);
|
||||
if (pid2 == 0 && tty1_commands) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
}
|
||||
wpid = wait(&status);
|
||||
if (wpid > 0 && wpid != pid1) {
|
||||
message(log, "pid %d exited, status=%x.\n", wpid, status);
|
||||
}
|
||||
/* Don't respawn an init script if it exits */
|
||||
if (run_rc == FALSE && wpid == pid1) {
|
||||
pid1 = 0;
|
||||
}
|
||||
if (wpid == pid2) {
|
||||
pid2 = 0;
|
||||
}
|
||||
sleep(1);
|
||||
}
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user