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Diffstat (limited to 'init.c')
-rw-r--r--init.c84
1 files changed, 51 insertions, 33 deletions
diff --git a/init.c b/init.c
index b8cbbf6..a56e23e 100644
--- a/init.c
+++ b/init.c
@@ -41,6 +41,9 @@
#include <sys/vt.h> /* for vt_stat */
#include <sys/ioctl.h>
+/* Turn this on to debug init so it won't reboot when killed */
+#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 */
@@ -61,7 +64,7 @@ int device_open(char *device, int mode)
{
int m, f, fd = -1;
- mode = m | O_NONBLOCK;
+ m = mode | O_NONBLOCK;
/* Retry up to 5 times */
for (f = 0; f < 5; f++)
@@ -99,25 +102,28 @@ void message(char *device, char *fmt, ...)
void set_term( int fd)
{
struct termios tty;
+ static const char control_characters[] = {
+ '\003', '\034', '\177', '\025', '\004', '\0',
+ '\1', '\0', '\021', '\023', '\032', '\0', '\022',
+ '\017', '\027', '\026', '\0'
+ };
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;
- 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[VSTART] = 17;
- tty.c_cc[VSTOP] = 19;
- tty.c_cc[VSUSP] = 26;
-
- tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
+
+ /* input modes */
+ tty.c_iflag = IGNPAR|ICRNL|IXON|IXOFF|IXANY;
+
+ /* use lineo dicipline 0 */
+ tty.c_line = 0;
+
+ /* output modes */
tty.c_oflag = OPOST|ONLCR;
- tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
+
+ /* local modes */
+ tty.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOPRT|ECHOKE|IEXTEN;
+
+ /* control chars */
+ memcpy(tty.c_cc, control_characters, sizeof(control_characters));
tcsetattr(fd, TCSANOW, &tty);
}
@@ -151,7 +157,7 @@ static void set_free_pages()
fclose(f);
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");
+ message(log, "\nIncreased /proc/sys/vm/freepages values to 30/40/50\n");
}
fclose(f);
}
@@ -165,7 +171,6 @@ static void console_init()
int tried_vtmaster = 0;
char *s;
- fprintf(stderr, "entering console_init()\n");
if ((s = getenv("CONSOLE")) != NULL)
console = s;
else {
@@ -175,6 +180,7 @@ static void console_init()
if ( stat(CONSOLE, &statbuf) && S_ISLNK(statbuf.st_mode)) {
fprintf(stderr, "Yikes! /dev/console does not exist or is a symlink.\n");
+ message(log, "Yikes! /dev/console does not exist or is a symlink.\n");
}
while ((fd = open(console, O_RDONLY | O_NONBLOCK)) < 0) {
if (!tried_devcons) {
@@ -193,7 +199,7 @@ static void console_init()
console = "/dev/null";
else
close(fd);
- fprintf(stderr, "console=%s\n", console);
+ message(log, "console=%s\n", console);
}
static int waitfor(int pid)
@@ -212,7 +218,7 @@ static int waitfor(int pid)
static pid_t run(const char * const* command,
char *terminal, int get_enter)
{
- int i;
+ int i, f;
pid_t pid;
static const char press_enter[] =
"\nPlease press Enter to activate this console. ";
@@ -224,9 +230,9 @@ static pid_t run(const char * const* command,
close(2);
setsid();
- open(terminal, O_RDWR);
- dup(0);
- dup(0);
+ f=open(terminal, O_RDWR);
+ dup(f);
+ dup(f);
tcsetpgrp(0, getpgrp());
set_term(0);
@@ -240,7 +246,7 @@ static pid_t run(const char * const* command,
* specifies.
*/
char c;
- write(0, press_enter, sizeof(press_enter) - 1);
+ write(1, press_enter, sizeof(press_enter) - 1);
read(0, &c, 1);
}
@@ -269,7 +275,7 @@ static pid_t run(const char * const* command,
return pid;
}
-
+#ifndef DEBUG_INIT
static void shutdown_system(void)
{
const char* const swap_off_cmd[] = { "/bin/swapoff", "-a", 0};
@@ -314,6 +320,7 @@ static void reboot_signal(int sig)
reboot(RB_AUTOBOOT);
exit(0);
}
+#endif
extern int init_main(int argc, char **argv)
{
@@ -326,11 +333,17 @@ extern int init_main(int argc, char **argv)
const char* const shell_commands[] = { SHELL, " -", 0};
const char* const* tty0_commands = init_commands;
const char* const* tty1_commands = shell_commands;
+#ifndef DEBUG_INIT
+ char *hello_msg_format =
+ "init(%d) started: BusyBox v%s (%s) multi-call binary\r\n";
+#else
char *hello_msg_format =
"init started: BusyBox v%s (%s) multi-call binary\r\n";
+#endif
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);
@@ -344,7 +357,7 @@ extern int init_main(int argc, char **argv)
/* Turn off rebooting via CTL-ALT-DEL -- we get a
* SIGINT on CAD so we can shut things down gracefully... */
reboot(RB_DISABLE_CAD);
-
+#endif
/* Figure out where the default console should be */
console_init();
@@ -352,7 +365,7 @@ extern int init_main(int argc, char **argv)
close(0);
close(1);
close(2);
- //set_term(0);
+ set_term(0);
setsid();
/* Make sure PATH is set to something sane */
@@ -360,17 +373,22 @@ extern int init_main(int argc, char **argv)
putenv(PATH_DEFAULT);
/* Hello world */
+#ifndef DEBUG_INIT
message(log, hello_msg_format, BB_VER, BB_BT);
- fprintf(stderr, hello_msg_format, BB_VER, BB_BT);
+ message(console, hello_msg_format, BB_VER, BB_BT);
+#else
+ message(log, hello_msg_format, getpid(), BB_VER, BB_BT);
+ message(console, hello_msg_format, getpid(), BB_VER, BB_BT);
+#endif
/* Mount /proc */
if (mount("/proc", "/proc", "proc", 0, 0) == 0) {
- fprintf(stderr, "Mounting /proc: done.\n");
message(log, "Mounting /proc: done.\n");
+ message(console, "Mounting /proc: done.\n");
} else {
- fprintf(stderr, "Mounting /proc: failed!\n");
message(log, "Mounting /proc: failed!\n");
+ message(console, "Mounting /proc: failed!\n");
}
/* Make sure there is enough memory to do something useful */
@@ -379,7 +397,7 @@ extern int init_main(int argc, char **argv)
int retval;
retval = stat("/etc/fstab", &statbuf);
if (retval) {
- fprintf(stderr, "%s", no_memory);
+ message(console, "%s", no_memory);
while (1) {
sleep(1);
}
@@ -387,7 +405,7 @@ extern int init_main(int argc, char **argv)
/* Try to turn on swap */
waitfor(run(swap_on_cmd, console, 0));
if (mem_total() < 2000) {
- fprintf(stderr, "%s", no_memory);
+ message(console, "%s", no_memory);
while (1) {
sleep(1);
}
generated by cgit v1.1 at 2024-11-08 01:37:50 +0000