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detect deleted tty lines in /etc/ttys.

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Alfred Perlstein 2000-02-19 20:28:45 +00:00
parent 81edae92ed
commit b0b670ee94
1 changed files with 25 additions and 1 deletions
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26
sbin/init/init.c
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@ -147,6 +147,7 @@ typedef struct init_session {
time_t se_started; /* used to avoid thrashing */
int se_flags; /* status of session */
#define SE_SHUTDOWN 0x1 /* session won't be restarted */
#define SE_PRESENT 0x2 /* session is in /etc/ttys */
int se_nspace; /* spacing count */
char *se_device; /* filename of port */
char *se_getty; /* what to run on that port */
@ -964,6 +965,7 @@ free_session(sp)
/*
* Allocate a new session descriptor.
* Mark it SE_PRESENT.
*/
session_t *
new_session(sprev, session_index, typ)
@ -982,6 +984,7 @@ new_session(sprev, session_index, typ)
sp = (session_t *) calloc(1, sizeof (session_t));
sp->se_index = session_index;
sp->se_flags |= SE_PRESENT;
sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name));
(void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name);
@ -1330,7 +1333,7 @@ multi_user()
}
/*
* This is an n-squared algorithm. We hope it isn't run often...
* This is an (n*2)+(n^2) algorithm. We hope it isn't run often...
*/
state_func_t
clean_ttys()
@ -1344,6 +1347,14 @@ clean_ttys()
if (! sessions)
return (state_func_t) multi_user;
/*
* mark all sessions for death, (!SE_PRESENT)
* as we find or create new ones they'll be marked as keepers,
* we'll later nuke all the ones not found in /etc/ttys
*/
for (sp = sessions; sp != NULL; sp = sp->se_next)
sp->se_flags &= ~SE_PRESENT;
devlen = sizeof(_PATH_DEV) - 1;
while ((typ = getttyent()) != NULL) {
++session_index;
@ -1353,6 +1364,8 @@ clean_ttys()
break;
if (sp) {
/* we want this one to live */
sp->se_flags |= SE_PRESENT;
if (sp->se_index != session_index) {
warning("port %s changed utmp index from %d to %d",
sp->se_device, sp->se_index,
@ -1403,6 +1416,17 @@ clean_ttys()
endttyent();
/*
* sweep through and kill all deleted sessions
* ones who's /etc/ttys line was deleted (SE_PRESENT unset)
*/
for (sp = sessions; sp != NULL; sp = sp->se_next) {
if ((sp->se_flags & SE_PRESENT) == 0) {
sp->se_flags |= SE_SHUTDOWN;
kill(sp->se_process, SIGHUP);
}
}
return (state_func_t) multi_user;
}