Cleanup of init
This commit is contained in:
Eric Andersen
parent
a745606df3
commit
c7c41d306b
157
init.c
157
init.c
@ -52,7 +52,7 @@
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#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
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static char *console = CONSOLE;
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static char *first_terminal = "/dev/tty1";
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//static char *first_terminal = "/dev/tty1";
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static char *second_terminal = "/dev/tty2";
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static char *log = "/dev/tty3";
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@ -98,16 +98,11 @@ void message(char *device, char *fmt, ...)
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}
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/* Set terminal settings to reasonable defaults */
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void set_term()
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void set_term( int fd)
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{
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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\n", console);
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return;
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}
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ioctl(fd, TCGETS, &tty);
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tcgetattr(fd, &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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@ -122,14 +117,11 @@ void set_term()
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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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/* Now set the terminal line. */
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ioctl(fd, TCSETS, &tty);
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close(fd);
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tcsetattr(fd, TCSANOW, &tty);
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}
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static int mem_total()
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@ -175,6 +167,7 @@ static void console_init()
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int tried_vtmaster = 0;
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char *s;
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fprintf(stderr, "entering console_init()\n");
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if ((s = getenv("CONSOLE")) != NULL)
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console = s;
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else {
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@ -183,7 +176,7 @@ static void console_init()
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}
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if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) {
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fprintf(stderr, "/dev/console does not exist, or is a symlink.\n");
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fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n");
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}
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while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
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if (!tried_devcons) {
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@ -218,42 +211,14 @@ static int waitfor(int pid)
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}
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static int run(const char *command, char *terminal, int get_enter)
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static pid_t run(const char * const* command,
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char *terminal, int get_enter)
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{
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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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int i;
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pid_t pid;
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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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strcpy(buf, command);
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ptr = buf;
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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')
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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)
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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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ptr++;
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/* If end-of-line, break */
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if (*ptr == '#' || *ptr == 0) {
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f++;
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*ptr = 0;
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break;
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}
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/* End word with \0 and continue */
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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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close(0);
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@ -261,22 +226,11 @@ static int 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 1
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//if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
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if ((f = device_open(terminal, O_RDWR )) < 0) {
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message(log, "open(%s) failed: %s\n",
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terminal, strerror(errno));
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return -1;
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}
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dup(f);
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dup(f);
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#else
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open(terminal, O_RDWR);
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dup(0);
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dup(0);
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//tcsetpgrp(0, getpgrp());
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#endif
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set_term();
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tcsetpgrp(0, getpgrp());
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set_term(0);
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if (get_enter) {
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/*
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@ -288,32 +242,30 @@ static int run(const char *command, char *terminal, int get_enter)
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* specifies.
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*/
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char c;
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write(1, press_enter, sizeof(press_enter) - 1);
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write(0, 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(console, "Executing '%s'\r\n", command);
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message(log, "Executing '%s'\r\n", command);
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/* Now run it. This program should take over this PID,
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/* Now run it. The new program will take over this PID,
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* so nothing further in init.c should be run. */
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execvp(args[1], args + 1);
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message(log, "Executing '%s', pid(%d)\r\n", *command, getpid());
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execvp(*command, (char**)command+1);
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message(console, "Hmm. Trying as a script.\r\n");
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message(log, "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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args[1] = SHELL;
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args[2] = "-c";
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strcpy(buf, "exec ");
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strcat(buf, command);
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args[3] = buf;
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args[4] = NULL;
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execvp(args[1], args + 1);
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char * args[16];
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args[0] = SHELL;
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args[1] = "-c";
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args[2] = "exec";
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for( i=0 ; i<16 && command[i]; i++)
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args[3+i] = (char*)command[i];
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args[i] = NULL;
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execvp(*args, (char**)args+1);
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}
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message(console, "Could not execute '%s'\n", command);
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message(log, "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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@ -323,6 +275,8 @@ static int run(const char *command, char *terminal, int get_enter)
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#ifndef DEBUG_INIT
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static void shutdown_system(void)
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{
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const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0};
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const char* const umount_cmd[] = { "/bin/umount", "-a", "-n", 0};
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message(console, "The system is going down NOW !!\r\n");
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sync();
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@ -337,8 +291,8 @@ static void shutdown_system(void)
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message(console, "Sending SIGKILL to all processes.\r\n");
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kill(-1, SIGKILL);
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sleep(1);
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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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waitfor(run( swap_off_cmd, console, 0));
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waitfor(run( umount_cmd, console, 0));
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sync();
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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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@ -369,18 +323,21 @@ static void reboot_signal(int sig)
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extern int 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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pid_t pid = 0;
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pid_t pid1 = 0;
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pid_t 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* const swap_on_cmd[] = { "/bin/swapon", " -a ", 0};
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const char* const init_commands[] = { SHELL, " -c", " exec ", INITSCRIPT, 0};
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const char* const shell_commands[] = { SHELL, " -", 0};
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const char* const* tty0_commands = init_commands;
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const char* const* 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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"init(%d) 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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pid = getpid();
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#ifndef DEBUG_INIT
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/* Set up sig handlers */
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@ -392,21 +349,20 @@ extern int init_main(int argc, char **argv)
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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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/* 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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#endif
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/* Figure out where the default console should be */
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console_init();
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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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//set_term(0);
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setsid();
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/* Make sure PATH is set to something sane */
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@ -414,16 +370,17 @@ extern int init_main(int argc, char **argv)
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putenv(PATH_DEFAULT);
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/* Hello world */
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message(log, hello_msg_format, BB_VER, BB_BT);
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message(console, hello_msg_format, BB_VER, BB_BT);
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message(log, hello_msg_format, pid, BB_VER, BB_BT);
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fprintf(stderr, hello_msg_format, pid, BB_VER, BB_BT);
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/* Mount /proc */
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if (mount("/proc", "/proc", "proc", 0, 0)) {
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message(console, "Mounting /proc: failed!\r\n");
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message(log, "Mounting /proc: failed!\n");
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} else {
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message(console, "Mounting /proc: done.\r\n");
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if (mount("/proc", "/proc", "proc", 0, 0) == 0) {
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fprintf(stderr, "Mounting /proc: done.\n");
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message(log, "Mounting /proc: done.\n");
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} else {
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fprintf(stderr, "Mounting /proc: failed!\n");
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message(log, "Mounting /proc: failed!\n");
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}
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/* Make sure there is enough memory to do something useful */
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@ -432,15 +389,15 @@ extern int init_main(int argc, char **argv)
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int retval;
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retval = stat("/etc/fstab", &statbuf);
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if (retval) {
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message(console, "%s", no_memory);
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fprintf(stderr, "%s", no_memory);
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while (1) {
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sleep(1);
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}
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} else {
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/* Try to turn on swap */
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waitfor(run("/bin/swapon -a", console, 0));
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waitfor(run(swap_on_cmd, console, 0));
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if (mem_total() < 2000) {
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message(console, "%s", no_memory);
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fprintf(stderr, "%s", no_memory);
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while (1) {
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sleep(1);
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}
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@ -466,11 +423,11 @@ extern int init_main(int argc, char **argv)
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* start up some VTs if somebody hits enter...
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*/
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for (;;) {
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int wpid;
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pid_t wpid;
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int status;
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if (pid1 == 0 && tty0_commands) {
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pid1 = run(tty0_commands, first_terminal, 1);
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pid1 = run(tty0_commands, console, 1);
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}
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if (pid2 == 0 && tty1_commands) {
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pid2 = run(tty1_commands, second_terminal, 1);
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157
init/init.c
157
init/init.c
@ -52,7 +52,7 @@
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#define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin"
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static char *console = CONSOLE;
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static char *first_terminal = "/dev/tty1";
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//static char *first_terminal = "/dev/tty1";
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static char *second_terminal = "/dev/tty2";
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static char *log = "/dev/tty3";
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@ -98,16 +98,11 @@ void message(char *device, char *fmt, ...)
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}
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/* Set terminal settings to reasonable defaults */
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void set_term()
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void set_term( int fd)
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{
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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\n", console);
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return;
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}
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ioctl(fd, TCGETS, &tty);
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tcgetattr(fd, &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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@ -122,14 +117,11 @@ void set_term()
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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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/* Now set the terminal line. */
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ioctl(fd, TCSETS, &tty);
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close(fd);
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tcsetattr(fd, TCSANOW, &tty);
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}
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static int mem_total()
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@ -175,6 +167,7 @@ static void console_init()
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int tried_vtmaster = 0;
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char *s;
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fprintf(stderr, "entering console_init()\n");
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if ((s = getenv("CONSOLE")) != NULL)
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console = s;
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else {
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@ -183,7 +176,7 @@ static void console_init()
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}
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if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) {
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fprintf(stderr, "/dev/console does not exist, or is a symlink.\n");
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fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n");
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}
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while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
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if (!tried_devcons) {
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@ -218,42 +211,14 @@ static int waitfor(int pid)
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}
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static int run(const char *command, char *terminal, int get_enter)
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static pid_t run(const char * const* command,
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char *terminal, int get_enter)
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{
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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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int i;
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pid_t pid;
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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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strcpy(buf, command);
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ptr = buf;
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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')
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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)
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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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ptr++;
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/* If end-of-line, break */
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if (*ptr == '#' || *ptr == 0) {
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f++;
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*ptr = 0;
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break;
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}
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/* End word with \0 and continue */
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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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close(0);
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@ -261,22 +226,11 @@ static int 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 1
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//if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) {
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if ((f = device_open(terminal, O_RDWR )) < 0) {
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message(log, "open(%s) failed: %s\n",
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terminal, strerror(errno));
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return -1;
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}
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dup(f);
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dup(f);
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#else
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open(terminal, O_RDWR);
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dup(0);
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dup(0);
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//tcsetpgrp(0, getpgrp());
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#endif
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set_term();
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tcsetpgrp(0, getpgrp());
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set_term(0);
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if (get_enter) {
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/*
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@ -288,32 +242,30 @@ static int run(const char *command, char *terminal, int get_enter)
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* specifies.
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*/
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char c;
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write(1, press_enter, sizeof(press_enter) - 1);
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write(0, 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(console, "Executing '%s'\r\n", command);
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message(log, "Executing '%s'\r\n", command);
|
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|
||||
/* Now run it. This program should take over this PID,
|
||||
/* Now run it. The new program will take over this PID,
|
||||
* so nothing further in init.c should be run. */
|
||||
execvp(args[1], args + 1);
|
||||
message(log, "Executing '%s', pid(%d)\r\n", *command, getpid());
|
||||
execvp(*command, (char**)command+1);
|
||||
|
||||
message(console, "Hmm. Trying as a script.\r\n");
|
||||
message(log, "Hmm. Trying as a script.\r\n");
|
||||
/* If shell scripts are not executed, force the issue */
|
||||
if (errno == ENOEXEC) {
|
||||
char buf[256];
|
||||
args[1] = SHELL;
|
||||
args[2] = "-c";
|
||||
strcpy(buf, "exec ");
|
||||
strcat(buf, command);
|
||||
args[3] = buf;
|
||||
args[4] = NULL;
|
||||
execvp(args[1], args + 1);
|
||||
char * args[16];
|
||||
args[0] = SHELL;
|
||||
args[1] = "-c";
|
||||
args[2] = "exec";
|
||||
for( i=0 ; i<16 && command[i]; i++)
|
||||
args[3+i] = (char*)command[i];
|
||||
args[i] = NULL;
|
||||
execvp(*args, (char**)args+1);
|
||||
}
|
||||
message(console, "Could not execute '%s'\n", command);
|
||||
message(log, "Could not execute '%s'\n", command);
|
||||
exit(-1);
|
||||
}
|
||||
return pid;
|
||||
@ -323,6 +275,8 @@ static int run(const char *command, char *terminal, int get_enter)
|
||||
#ifndef DEBUG_INIT
|
||||
static void shutdown_system(void)
|
||||
{
|
||||
const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0};
|
||||
const char* const umount_cmd[] = { "/bin/umount", "-a", "-n", 0};
|
||||
|
||||
message(console, "The system is going down NOW !!\r\n");
|
||||
sync();
|
||||
@ -337,8 +291,8 @@ static void shutdown_system(void)
|
||||
message(console, "Sending SIGKILL to all processes.\r\n");
|
||||
kill(-1, SIGKILL);
|
||||
sleep(1);
|
||||
waitfor(run("/bin/swapoff -a", console, 0));
|
||||
waitfor(run("/bin/umount -a -n", console, 0));
|
||||
waitfor(run( swap_off_cmd, console, 0));
|
||||
waitfor(run( umount_cmd, console, 0));
|
||||
sync();
|
||||
if (get_kernel_revision() <= 2 * 65536 + 2 * 256 + 11) {
|
||||
/* Removed bdflush call, kupdate in kernels >2.2.11 */
|
||||
@ -369,18 +323,21 @@ static void reboot_signal(int sig)
|
||||
extern int init_main(int argc, char **argv)
|
||||
{
|
||||
int run_rc = TRUE;
|
||||
int pid1 = 0;
|
||||
int pid2 = 0;
|
||||
pid_t pid = 0;
|
||||
pid_t pid1 = 0;
|
||||
pid_t 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* const swap_on_cmd[] = { "/bin/swapon", " -a ", 0};
|
||||
const char* const init_commands[] = { SHELL, " -c", " exec ", INITSCRIPT, 0};
|
||||
const char* const shell_commands[] = { SHELL, " -", 0};
|
||||
const char* const* tty0_commands = init_commands;
|
||||
const char* const* tty1_commands = shell_commands;
|
||||
char *hello_msg_format =
|
||||
"init started: BusyBox v%s (%s) multi-call binary\r\n";
|
||||
"init(%d) started: BusyBox v%s (%s) multi-call binary\r\n";
|
||||
const char *no_memory =
|
||||
"Sorry, your computer does not have enough memory.\r\n";
|
||||
|
||||
pid = getpid();
|
||||
|
||||
#ifndef DEBUG_INIT
|
||||
/* Set up sig handlers */
|
||||
@ -392,21 +349,20 @@ extern int init_main(int argc, char **argv)
|
||||
signal(SIGUSR2, reboot_signal);
|
||||
signal(SIGINT, reboot_signal);
|
||||
signal(SIGTERM, reboot_signal);
|
||||
#endif
|
||||
/* 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... */
|
||||
#ifndef DEBUG_INIT
|
||||
reboot(RB_DISABLE_CAD);
|
||||
#endif
|
||||
|
||||
/* Figure out where the default console should be */
|
||||
console_init();
|
||||
|
||||
/* Close whatever files are open, and reset the console. */
|
||||
close(0);
|
||||
close(1);
|
||||
close(2);
|
||||
set_term();
|
||||
//set_term(0);
|
||||
setsid();
|
||||
|
||||
/* Make sure PATH is set to something sane */
|
||||
@ -414,16 +370,17 @@ extern int init_main(int argc, char **argv)
|
||||
putenv(PATH_DEFAULT);
|
||||
|
||||
/* Hello world */
|
||||
message(log, hello_msg_format, BB_VER, BB_BT);
|
||||
message(console, hello_msg_format, BB_VER, BB_BT);
|
||||
message(log, hello_msg_format, pid, BB_VER, BB_BT);
|
||||
fprintf(stderr, hello_msg_format, pid, BB_VER, BB_BT);
|
||||
|
||||
|
||||
/* Mount /proc */
|
||||
if (mount("/proc", "/proc", "proc", 0, 0)) {
|
||||
message(console, "Mounting /proc: failed!\r\n");
|
||||
message(log, "Mounting /proc: failed!\n");
|
||||
} else {
|
||||
message(console, "Mounting /proc: done.\r\n");
|
||||
if (mount("/proc", "/proc", "proc", 0, 0) == 0) {
|
||||
fprintf(stderr, "Mounting /proc: done.\n");
|
||||
message(log, "Mounting /proc: done.\n");
|
||||
} else {
|
||||
fprintf(stderr, "Mounting /proc: failed!\n");
|
||||
message(log, "Mounting /proc: failed!\n");
|
||||
}
|
||||
|
||||
/* Make sure there is enough memory to do something useful */
|
||||
@ -432,15 +389,15 @@ extern int init_main(int argc, char **argv)
|
||||
int retval;
|
||||
retval = stat("/etc/fstab", &statbuf);
|
||||
if (retval) {
|
||||
message(console, "%s", no_memory);
|
||||
fprintf(stderr, "%s", no_memory);
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
} else {
|
||||
/* Try to turn on swap */
|
||||
waitfor(run("/bin/swapon -a", console, 0));
|
||||
waitfor(run(swap_on_cmd, console, 0));
|
||||
if (mem_total() < 2000) {
|
||||
message(console, "%s", no_memory);
|
||||
fprintf(stderr, "%s", no_memory);
|
||||
while (1) {
|
||||
sleep(1);
|
||||
}
|
||||
@ -466,11 +423,11 @@ extern int init_main(int argc, char **argv)
|
||||
* start up some VTs if somebody hits enter...
|
||||
*/
|
||||
for (;;) {
|
||||
int wpid;
|
||||
pid_t wpid;
|
||||
int status;
|
||||
|
||||
if (pid1 == 0 && tty0_commands) {
|
||||
pid1 = run(tty0_commands, first_terminal, 1);
|
||||
pid1 = run(tty0_commands, console, 1);
|
||||
}
|
||||
if (pid2 == 0 && tty1_commands) {
|
||||
pid2 = run(tty1_commands, second_terminal, 1);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user