8a8fbb87f
Eric Andersen
1999-10-26
Subject
Foo
SOURCE BUG
This commit was genuinely broken at the time (not related to our build system): regexp.c bu commit'te eklendi ama karsilik gelen regexp.h unutuldu, 11 commit sonra (c8fdb5638) eklendi - o araliktaki her commit gercekten derlenemezdi
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Commit Diff GitHub →
init.c+194 -212
| @@ -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, ...) |
| - | { |
| - | 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; |
| - | } |
| + | #endif |
| - | extern int |
| - | init_main(int argc, char * * argv) |
| + | 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(); |
| - | |
| - | /* 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); |
| - | |
| - | |
| - | /* 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"); |
| - | |
| + | /* 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); |
| + | |
| + | /* 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"); |
| + | } |
| - | /* 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); |
| - | } |
| - | 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); |
| + | /* 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); |
| + | } |
| + | /* Don't respawn an init script if it exits */ |
| + | if (run_rc == FALSE && wpid == pid1) { |
| + | pid1 = 0; |
| + | } |
| + | if (wpid == pid2) { |
| + | pid2 = 0; |
| + | } |
| + | sleep(1); |
| + | } |
| } | |
| - | |
init/init.c+194 -212
| @@ -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, ...) |
| - | { |
| - | 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; |
| - | } |
| + | #endif |
| - | extern int |
| - | init_main(int argc, char * * argv) |
| + | 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(); |
| - | |
| - | /* 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); |
| - | |
| - | |
| - | /* 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"); |
| - | |
| + | /* 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); |
| + | |
| + | /* 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"); |
| + | } |
| - | /* 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); |
| - | } |
| - | 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); |
| + | /* 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); |
| + | } |
| + | /* Don't respawn an init script if it exits */ |
| + | if (run_rc == FALSE && wpid == pid1) { |
| + | pid1 = 0; |
| + | } |
| + | if (wpid == pid2) { |
| + | pid2 = 0; |
| + | } |
| + | sleep(1); |
| + | } |
| } | |
| - | |