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This commit is contained in:
David E. O'Brien 2007-11-20 19:50:45 +00:00
parent 4a0ace6d5c
commit 091abe405c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=173785
1 changed files with 94 additions and 93 deletions
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187
sbin/init/init.c
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@ -86,14 +86,14 @@ static const char rcsid[] =
*/ */
#define GETTY_SPACING 5 /* N secs minimum getty spacing */ #define GETTY_SPACING 5 /* N secs minimum getty spacing */
#define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ #define GETTY_SLEEP 30 /* sleep N secs after spacing problem */
#define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ #define GETTY_NSPACE 3 /* max. spacing count to bring reaction */
#define WINDOW_WAIT 3 /* wait N secs after starting window */ #define WINDOW_WAIT 3 /* wait N secs after starting window */
#define STALL_TIMEOUT 30 /* wait N secs after warning */ #define STALL_TIMEOUT 30 /* wait N secs after warning */
#define DEATH_WATCH 10 /* wait N secs for procs to die */ #define DEATH_WATCH 10 /* wait N secs for procs to die */
#define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */ #define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */
#define RESOURCE_RC "daemon" #define RESOURCE_RC "daemon"
#define RESOURCE_WINDOW "default" #define RESOURCE_WINDOW "default"
#define RESOURCE_GETTY "default" #define RESOURCE_GETTY "default"
void handle(sig_t, ...); void handle(sig_t, ...);
void delset(sigset_t *, ...); void delset(sigset_t *, ...);
@ -198,7 +198,6 @@ main(int argc, char *argv[])
struct sigaction sa; struct sigaction sa;
sigset_t mask; sigset_t mask;
/* Dispose of random users. */ /* Dispose of random users. */
if (getuid() != 0) if (getuid() != 0)
errx(1, "%s", strerror(EPERM)); errx(1, "%s", strerror(EPERM));
@ -213,23 +212,23 @@ main(int argc, char *argv[])
int sig; int sig;
switch (runlevel) { switch (runlevel) {
case '0': /* halt + poweroff */ case '0': /* halt + poweroff */
sig = SIGUSR2; sig = SIGUSR2;
break; break;
case '1': /* single-user */ case '1': /* single-user */
sig = SIGTERM; sig = SIGTERM;
break; break;
case '6': /* reboot */ case '6': /* reboot */
sig = SIGINT; sig = SIGINT;
break; break;
case 'c': /* block further logins */ case 'c': /* block further logins */
sig = SIGTSTP; sig = SIGTSTP;
break; break;
case 'q': /* rescan /etc/ttys */ case 'q': /* rescan /etc/ttys */
sig = SIGHUP; sig = SIGHUP;
break; break;
default: default:
goto invalid; goto invalid;
} }
kill(1, sig); kill(1, sig);
_exit(0); _exit(0);
@ -287,21 +286,21 @@ main(int argc, char *argv[])
* so that they get reset on exec. * so that they get reset on exec.
*/ */
handle(badsys, SIGSYS, 0); handle(badsys, SIGSYS, 0);
handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGXCPU,
SIGBUS, SIGXCPU, SIGXFSZ, 0); SIGXFSZ, 0);
handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGUSR1,
SIGUSR1, SIGUSR2, 0); SIGUSR2, 0);
handle(alrm_handler, SIGALRM, 0); handle(alrm_handler, SIGALRM, 0);
sigfillset(&mask); sigfillset(&mask);
delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS,
SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM,
SIGUSR1, SIGUSR2, 0); SIGUSR1, SIGUSR2, 0);
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
sigemptyset(&sa.sa_mask); sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; sa.sa_flags = 0;
sa.sa_handler = SIG_IGN; sa.sa_handler = SIG_IGN;
(void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); sigaction(SIGTTIN, &sa, (struct sigaction *)0);
(void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); sigaction(SIGTTOU, &sa, (struct sigaction *)0);
/* /*
* Paranoia. * Paranoia.
@ -492,8 +491,9 @@ badsys(int sig)
void void
disaster(int sig) disaster(int sig)
{ {
emergency("fatal signal: %s", emergency("fatal signal: %s",
(unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal"); (unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal");
sleep(STALL_TIMEOUT); sleep(STALL_TIMEOUT);
_exit(sig); /* reboot */ _exit(sig); /* reboot */
@ -557,6 +557,7 @@ setsecuritylevel(int newlevel)
void void
transition(state_t s) transition(state_t s)
{ {
for (;;) for (;;)
s = (state_t) (*s)(); s = (state_t) (*s)();
} }
@ -583,7 +584,7 @@ setctty(const char *name)
{ {
int fd; int fd;
(void) revoke(name); revoke(name);
if ((fd = open(name, O_RDWR)) == -1) { if ((fd = open(name, O_RDWR)) == -1) {
stall("can't open %s: %m", name); stall("can't open %s: %m", name);
_exit(1); _exit(1);
@ -608,6 +609,7 @@ get_shell(void)
void void
write_stderr(const char *message) write_stderr(const char *message)
{ {
write(STDERR_FILENO, message, strlen(message)); write(STDERR_FILENO, message, strlen(message));
} }
@ -687,7 +689,7 @@ single_user(void)
write_stderr(": "); write_stderr(": ");
while ((num = read(STDIN_FILENO, cp, 1)) != -1 && while ((num = read(STDIN_FILENO, cp, 1)) != -1 &&
num != 0 && *cp != '\n' && cp < &altshell[127]) num != 0 && *cp != '\n' && cp < &altshell[127])
cp++; cp++;
*cp = '\0'; *cp = '\0';
if (altshell[0] != '\0') if (altshell[0] != '\0')
shell = altshell; shell = altshell;
@ -806,8 +808,8 @@ run_script(const char *script)
sigemptyset(&sa.sa_mask); sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; sa.sa_flags = 0;
sa.sa_handler = SIG_IGN; sa.sa_handler = SIG_IGN;
(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); sigaction(SIGTSTP, &sa, (struct sigaction *)0);
(void) sigaction(SIGHUP, &sa, (struct sigaction *)0); sigaction(SIGHUP, &sa, (struct sigaction *)0);
setctty(_PATH_CONSOLE); setctty(_PATH_CONSOLE);
@ -855,7 +857,7 @@ run_script(const char *script)
} }
if (wpid == pid && WIFSTOPPED(status)) { if (wpid == pid && WIFSTOPPED(status)) {
warning("init: %s on %s stopped, restarting\n", warning("init: %s on %s stopped, restarting\n",
shell, script); shell, script);
kill(pid, SIGCONT); kill(pid, SIGCONT);
wpid = -1; wpid = -1;
} }
@ -1014,7 +1016,7 @@ new_session(session_t *sprev, int session_index, struct ttyent *typ)
sp->se_flags |= SE_PRESENT; sp->se_flags |= SE_PRESENT;
sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name));
(void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name);
/* /*
* Attempt to open the device, if we get "device not configured" * Attempt to open the device, if we get "device not configured"
@ -1058,7 +1060,7 @@ setupargv(session_t *sp, struct ttyent *typ)
free(sp->se_getty_argv); free(sp->se_getty_argv);
} }
sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2);
(void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name);
sp->se_getty_argv_space = strdup(sp->se_getty); sp->se_getty_argv_space = strdup(sp->se_getty);
sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); sp->se_getty_argv = construct_argv(sp->se_getty_argv_space);
if (sp->se_getty_argv == 0) { if (sp->se_getty_argv == 0) {
@ -1081,7 +1083,7 @@ setupargv(session_t *sp, struct ttyent *typ)
sp->se_window_argv = construct_argv(sp->se_window_argv_space); sp->se_window_argv = construct_argv(sp->se_window_argv_space);
if (sp->se_window_argv == 0) { if (sp->se_window_argv == 0) {
warning("can't parse window for port %s", warning("can't parse window for port %s",
sp->se_device); sp->se_device);
free(sp->se_window_argv_space); free(sp->se_window_argv_space);
free(sp->se_window); free(sp->se_window);
sp->se_window = sp->se_window_argv_space = 0; sp->se_window = sp->se_window_argv_space = 0;
@ -1144,12 +1146,11 @@ start_window_system(session_t *sp)
if ((pid = fork()) == -1) { if ((pid = fork()) == -1) {
emergency("can't fork for window system on port %s: %m", emergency("can't fork for window system on port %s: %m",
sp->se_device); sp->se_device);
/* hope that getty fails and we can try again */ /* hope that getty fails and we can try again */
return; return;
} }
if (pid) if (pid) {
{
waitpid(-1, &status, 0); waitpid(-1, &status, 0);
return; return;
} }
@ -1157,7 +1158,7 @@ start_window_system(session_t *sp)
/* reparent window process to the init to not make a zombie on exit */ /* reparent window process to the init to not make a zombie on exit */
if ((pid = fork()) == -1) { if ((pid = fork()) == -1) {
emergency("can't fork for window system on port %s: %m", emergency("can't fork for window system on port %s: %m",
sp->se_device); sp->se_device);
_exit(1); _exit(1);
} }
if (pid) if (pid)
@ -1221,7 +1222,7 @@ start_getty(session_t *sp)
if (too_quick) { if (too_quick) {
warning("getty repeating too quickly on port %s, sleeping %d secs", warning("getty repeating too quickly on port %s, sleeping %d secs",
sp->se_device, GETTY_SLEEP); sp->se_device, GETTY_SLEEP);
sleep((unsigned) GETTY_SLEEP); sleep((unsigned) GETTY_SLEEP);
} }
@ -1242,8 +1243,7 @@ start_getty(session_t *sp)
strncat(term, sp->se_type, sizeof(term) - 6); strncat(term, sp->se_type, sizeof(term) - 6);
env[0] = term; env[0] = term;
env[1] = 0; env[1] = 0;
} } else
else
env[0] = 0; env[0] = 0;
execve(sp->se_getty_argv[0], sp->se_getty_argv, env); execve(sp->se_getty_argv[0], sp->se_getty_argv, env);
stall("can't exec getty '%s' for port %s: %m", stall("can't exec getty '%s' for port %s: %m",
@ -1476,6 +1476,7 @@ catatonia(void)
void void
alrm_handler(int sig) alrm_handler(int sig)
{ {
(void)sig; (void)sig;
clang = 1; clang = 1;
} }
@ -1500,8 +1501,8 @@ death(void)
} }
/* Try to run the rc.shutdown script within a period of time */ /* Try to run the rc.shutdown script within a period of time */
(void) runshutdown(); runshutdown();
for (i = 0; i < 2; ++i) { for (i = 0; i < 2; ++i) {
if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH)
return (state_func_t) single_user; return (state_func_t) single_user;
@ -1562,17 +1563,17 @@ runshutdown(void)
sigemptyset(&sa.sa_mask); sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; sa.sa_flags = 0;
sa.sa_handler = SIG_IGN; sa.sa_handler = SIG_IGN;
(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); sigaction(SIGTSTP, &sa, (struct sigaction *)0);
(void) sigaction(SIGHUP, &sa, (struct sigaction *)0); sigaction(SIGHUP, &sa, (struct sigaction *)0);
if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1) if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1)
warning("can't open %s: %m", _PATH_CONSOLE); warning("can't open %s: %m", _PATH_CONSOLE);
else { else {
(void) dup2(fd, 0); dup2(fd, 0);
(void) dup2(fd, 1); dup2(fd, 1);
(void) dup2(fd, 2); dup2(fd, 2);
if (fd > 2) if (fd > 2)
close(fd); close(fd);
} }
/* /*
@ -1608,10 +1609,9 @@ runshutdown(void)
} }
len = sizeof(shutdowntimeout); len = sizeof(shutdowntimeout);
if (sysctlbyname("kern.init_shutdown_timeout", if (sysctlbyname("kern.init_shutdown_timeout", &shutdowntimeout, &len,
&shutdowntimeout, NULL, 0) == -1 || shutdowntimeout < 2)
&len, NULL, 0) == -1 || shutdowntimeout < 2) shutdowntimeout = DEATH_SCRIPT;
shutdowntimeout = DEATH_SCRIPT;
alarm(shutdowntimeout); alarm(shutdowntimeout);
clang = 0; clang = 0;
/* /*
@ -1674,40 +1674,40 @@ runshutdown(void)
static char * static char *
strk(char *p) strk(char *p)
{ {
static char *t; static char *t;
char *q; char *q;
int c; int c;
if (p) if (p)
t = p; t = p;
if (!t) if (!t)
return 0; return 0;
c = *t; c = *t;
while (c == ' ' || c == '\t' ) while (c == ' ' || c == '\t' )
c = *++t; c = *++t;
if (!c) { if (!c) {
t = 0; t = 0;
return 0; return 0;
} }
q = t;
if (c == '\'') {
c = *++t;
q = t; q = t;
while (c && c != '\'') if (c == '\'') {
c = *++t; c = *++t;
if (!c) /* unterminated string */ q = t;
q = t = 0; while (c && c != '\'')
else c = *++t;
*t++ = 0; if (!c) /* unterminated string */
} else { q = t = 0;
while (c && c != ' ' && c != '\t' ) else
c = *++t; *t++ = 0;
*t++ = 0; } else {
if (!c) while (c && c != ' ' && c != '\t' )
t = 0; c = *++t;
} *t++ = 0;
return q; if (!c)
t = 0;
}
return q;
} }
#ifdef LOGIN_CAP #ifdef LOGIN_CAP
@ -1716,7 +1716,8 @@ setprocresources(const char *cname)
{ {
login_cap_t *lc; login_cap_t *lc;
if ((lc = login_getclassbyname(cname, NULL)) != NULL) { if ((lc = login_getclassbyname(cname, NULL)) != NULL) {
setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES); setusercontext(lc, (struct passwd*)NULL, 0,
LOGIN_SETPRIORITY | LOGIN_SETRESOURCES);
login_close(lc); login_close(lc);
} }
} }