From c7c41d306b8e172a2fba432d3c4b9f97b9963816 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Thu, 28 Oct 1999 00:24:35 +0000 Subject: Cleanup of init --- init/init.c | 169 ++++++++++++++++++++++-------------------------------------- 1 file changed, 63 insertions(+), 106 deletions(-) (limited to 'init/init.c') diff --git a/init/init.c b/init/init.c index 83fc9519a..d950e2bef 100644 --- a/init/init.c +++ b/init/init.c @@ -52,7 +52,7 @@ #define PATH_DEFAULT "PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin" static char *console = CONSOLE; -static char *first_terminal = "/dev/tty1"; +//static char *first_terminal = "/dev/tty1"; static char *second_terminal = "/dev/tty2"; static char *log = "/dev/tty3"; @@ -83,7 +83,7 @@ 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); @@ -98,18 +98,13 @@ void message(char *device, char *fmt, ...) } /* Set terminal settings to reasonable defaults */ -void set_term() +void set_term( int fd) { - int fd; struct termios tty; - 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; + tcgetattr(fd, &tty); + tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD; + tty.c_cflag |= HUPCL|CLOCAL; tty.c_cc[VINTR] = 3; tty.c_cc[VQUIT] = 28; @@ -122,14 +117,11 @@ void set_term() 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); + tcsetattr(fd, TCSANOW, &tty); } static int mem_total() @@ -175,6 +167,7 @@ static void console_init() int tried_vtmaster = 0; char *s; + fprintf(stderr, "entering console_init()\n"); if ((s = getenv("CONSOLE")) != NULL) console = s; else { @@ -183,7 +176,7 @@ static void console_init() } if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) { - fprintf(stderr, "/dev/console does not exist, or is a symlink.\n"); + fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n"); } while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) { if (!tried_devcons) { @@ -218,42 +211,14 @@ static int waitfor(int pid) } -static int run(const char *command, char *terminal, int get_enter) +static pid_t run(const char * const* command, + char *terminal, int get_enter) { - int f, pid; - char *args[16]; - char buf[256]; - char *ptr; + int i; + pid_t pid; static const char press_enter[] = "\nPlease press Enter to activate this console. "; - - /* Make a proper command from the command string */ - strcpy(buf, command); - ptr = buf; - for (f = 1; f < 15; f++) { - /* Skip white space */ - while (*ptr == ' ' || *ptr == '\t') - ptr++; - args[f] = ptr; - /* May be trailing space.. */ - if (*ptr == 0) - break; - /* Skip this `word' */ - while (*ptr && *ptr != ' ' && *ptr != '\t' && *ptr != '#') - ptr++; - /* If end-of-line, break */ - if (*ptr == '#' || *ptr == 0) { - f++; - *ptr = 0; - break; - } - /* End word with \0 and continue */ - args[f] = NULL; - } - args[0] = args[1]; - - if ((pid = fork()) == 0) { /* Clean up */ close(0); @@ -261,22 +226,11 @@ static int run(const char *command, char *terminal, int get_enter) close(2); setsid(); -#if 1 - //if ((f = device_open(terminal, O_RDWR | O_NOCTTY)) < 0) { - if ((f = device_open(terminal, O_RDWR )) < 0) { - message(log, "open(%s) failed: %s\n", - terminal, strerror(errno)); - return -1; - } - dup(f); - dup(f); -#else open(terminal, O_RDWR); dup(0); dup(0); - //tcsetpgrp(0, getpgrp()); -#endif - set_term(); + tcsetpgrp(0, getpgrp()); + set_term(0); if (get_enter) { /* @@ -288,32 +242,30 @@ static int run(const char *command, char *terminal, int get_enter) * specifies. */ char c; - write(1, press_enter, sizeof(press_enter) - 1); + write(0, press_enter, sizeof(press_enter) - 1); read(0, &c, 1); - message(console, "Got an enter\r\n"); } /* Log the process name and args */ - message(console, "Executing '%s'\r\n", command); - message(log, "Executing '%s'\r\n", command); - /* 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); -- cgit v1.2.3