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Init is now _more_ perfect then before.

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-Erik
This commit is contained in:
Erik Andersen
2000-01-07 02:54:55 +00:00
parent 9324b400ab
commit 0e3782f7c3
2 changed files with 120 additions and 74 deletions
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97
init/init.c
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@@ -319,22 +319,6 @@ static void console_init()
message(LOG, "console=%s\n", console );
}
static int waitfor(int pid)
{
int status, wpid;
while (1) {
wpid = wait(&status);
if (wpid > 0 ) {
message(LOG, "pid %d exited, status=0x%x.\n", wpid, status);
break;
}
if (wpid == pid )
break;
}
return wpid;
}
static pid_t run(char* command,
char *terminal, int get_enter)
{
@@ -415,18 +399,37 @@ static pid_t run(char* command,
return pid;
}
static int waitfor(char* command,
char *terminal, int get_enter)
{
int status, wpid;
int pid = run( command, terminal, get_enter);
while (1) {
wpid = wait(&status);
if (wpid > 0 ) {
message(LOG, "Process '%s' (pid %d) exited.\n",
command, wpid);
break;
}
if (wpid == pid )
break;
}
return wpid;
}
/* Make sure there is enough memory to do something useful. *
* Calls swapon if needed so be sure /proc is mounted. */
static void check_memory()
{
struct stat statbuf;
struct stat statBuf;
if (mem_total() > 3500)
return;
if (stat("/etc/fstab", &statbuf) == 0) {
if (stat("/etc/fstab", &statBuf) == 0) {
/* Try to turn on swap */
waitfor(run("/bin/swapon swapon -a", log, FALSE));
waitfor("/bin/swapon swapon -a", log, FALSE);
if (mem_total() < 3500)
goto goodnight;
} else
@@ -457,13 +460,12 @@ static void shutdown_system(void)
sleep(1);
message(CONSOLE, "Disabling swap.\r\n");
waitfor(run( "swapoff -a", console, FALSE));
waitfor( "swapoff -a", console, FALSE);
message(CONSOLE, "Unmounting filesystems.\r\n");
waitfor(run( "umount -a", console, FALSE));
waitfor("umount -a", console, FALSE);
sync();
if (kernel_version > 0 && kernel_version <= 2 * 65536 + 2 * 256 + 11) {
/* bdflush, kupdate not needed for kernels >2.2.11 */
message(CONSOLE, "Flushing buffers.\r\n");
bdflush(1, 0);
sync();
}
@@ -503,23 +505,26 @@ void new_initAction (const struct initActionType *a,
/* If BusyBox detects that a serial console is in use,
* then entries containing non-empty id fields will _not_ be run.
*/
if (second_console != NULL && *cons != '\0')
if (second_console == NULL && *cons != '\0') {
return;
}
newAction = calloc ((size_t)(1), sizeof(initAction));
if (!newAction) {
fprintf(stderr, "Memory allocation failure\n");
message(LOG|CONSOLE,"Memory allocation failure\n");
while (1) sleep(1);
}
newAction->nextPtr = initActionList;
initActionList = newAction;
strncpy( newAction->process, process, 255);
newAction->action = a->action;
if (*cons != '\0')
if (*cons != '\0') {
strncpy(newAction->console, cons, 255);
else
} else
strncpy(newAction->console, console, 255);
newAction->pid = 0;
message(LOG|CONSOLE, "process='%s' action='%d' console='%s'\n",
newAction->process, newAction->action, newAction->console);
}
void delete_initAction (initAction *action)
@@ -545,7 +550,7 @@ void parse_inittab(void)
{
#ifdef BB_FEATURE_USE_INITTAB
FILE* file;
char buf[256], buf1[256];
char buf[256], lineAsRead[256], tmpConsole[256];
char *p, *q, *r, *s;
const struct initActionType *a = actions;
int foundIt;
@@ -578,7 +583,8 @@ void parse_inittab(void)
*q='\0';
/* Keep a copy around for posterity's sake (and error msgs) */
strcpy(buf1, buf);
strcpy(lineAsRead, buf);
message(LOG|CONSOLE, "read='%s'\n", lineAsRead);
/* Grab the ID field */
s=p;
@@ -592,7 +598,7 @@ void parse_inittab(void)
* of the string */
q = strrchr( p, ':');
if ( q == NULL || *(q+1) == '\0' ) {
fprintf(stderr, "Bad inittab entry: %s\n", buf1);
message(LOG|CONSOLE,"Bad inittab entry: %s\n", lineAsRead);
continue;
} else {
*q='\0';
@@ -602,7 +608,7 @@ void parse_inittab(void)
/* Now peal off the action field */
r = strrchr( p, ':');
if ( r == NULL || *(r+1) == '\0') {
fprintf(stderr, "Bad inittab entry: %s\n", buf1);
message(LOG|CONSOLE,"Bad inittab entry: %s\n", lineAsRead);
continue;
} else {
++r;
@@ -612,6 +618,16 @@ void parse_inittab(void)
a = actions;
while (a->name != 0) {
if (strcmp(a->name, r) == 0) {
if (*s != '\0') {
struct stat statBuf;
strcpy(tmpConsole, "/dev/");
strncat(tmpConsole, s, 200);
if (stat(tmpConsole, &statBuf) != 0) {
message(LOG|CONSOLE, "device '%s' does not exist. Did you read the directions?\n", tmpConsole);
break;
}
s = tmpConsole;
}
new_initAction( a, q, s);
foundIt=TRUE;
}
@@ -621,7 +637,7 @@ void parse_inittab(void)
continue;
else {
/* Choke on an unknown action */
fprintf(stderr, "Bad inittab entry: %s\n", buf1);
message(LOG|CONSOLE, "Bad inittab entry: %s\n", lineAsRead);
}
}
return;
@@ -670,11 +686,11 @@ extern int init_main(int argc, char **argv)
/* Hello world */
#ifndef DEBUG_INIT
message(CONSOLE|LOG,
message(LOG|CONSOLE,
"init started: BusyBox v%s (%s) multi-call binary\r\n",
BB_VER, BB_BT);
#else
message(CONSOLE|LOG,
message(LOG|CONSOLE,
"init(%d) started: BusyBox v%s (%s) multi-call binary\r\n",
getpid(), BB_VER, BB_BT);
#endif
@@ -682,10 +698,10 @@ extern int init_main(int argc, char **argv)
/* Mount /proc */
if (mount ("proc", "/proc", "proc", 0, 0) == 0) {
message(CONSOLE|LOG, "Mounting /proc: done.\n");
message(LOG|CONSOLE, "Mounting /proc: done.\n");
kernel_version = get_kernel_revision();
} else
message(CONSOLE|LOG, "Mounting /proc: failed!\n");
message(LOG|CONSOLE, "Mounting /proc: failed!\n");
/* Make sure there is enough memory to do something useful. */
check_memory();
@@ -711,10 +727,11 @@ extern int init_main(int argc, char **argv)
/* Now run everything that needs to be run */
message(LOG|CONSOLE, "Running SYSINIT\n");
/* First run the sysinit command */
for( a=initActionList ; a; a=a->nextPtr) {
if (a->action == SYSINIT) {
waitfor(run(a->process, console, FALSE));
waitfor(a->process, console, FALSE);
/* Now remove the "sysinit" entry from the list */
delete_initAction( a);
}
@@ -722,7 +739,7 @@ extern int init_main(int argc, char **argv)
/* Next run anything that wants to block */
for( a=initActionList ; a; a=a->nextPtr) {
if (a->action == WAIT) {
waitfor(run(a->process, console, FALSE));
waitfor(a->process, console, FALSE);
/* Now remove the "wait" entry from the list */
delete_initAction( a);
}
@@ -735,9 +752,15 @@ extern int init_main(int argc, char **argv)
delete_initAction( a);
}
}
/* If there is nothing else to do, stop */
if (initActionList == NULL) {
message(LOG|CONSOLE, "No more tasks for init -- sleeping forever.\n");
while (1) sleep(1);
}
/* Now run the looping stuff for the rest of forever */
while (1) {
message(LOG|CONSOLE, "Looping\n");
for( a=initActionList ; a; a=a->nextPtr) {
/* Only run stuff with pid==0. If they have
* a pid, that means they are still running */