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runit/*: get rid of tai[a] time abstraction, it's too bloaty.

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text    data     bss     dec     hex filename
 772537    1058   11092  784687   bf92f busybox.t0/busybox
 772459    1058   11060  784577   bf8c1 busybox.t1/busybox
 772326    1058   11028  784412   bf81c busybox.t2/busybox
 772158    1058   10980  784196   bf744 busybox.t3/busybox
 771490    1055   10988  783533   bf4ad busybox.t4/busybox
This commit is contained in:
Denis Vlasenko
2007-08-20 17:27:40 +00:00
parent 63db27f9f4
commit 45946f8b51
7 changed files with 393 additions and 510 deletions
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153
runit/runsv.c
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@@ -54,21 +54,19 @@ struct svdir {
smallint ctrl;
smallint want;
smallint islog;
struct taia start;
struct timespec start;
int fdlock;
int fdcontrol;
int fdcontrolwrite;
};
static struct svdir svd[2];
static struct svdir svd[2];
static smallint sigterm;
static smallint haslog;
static smallint pidchanged = 1;
static int logpipe[2];
static char *dir;
#define usage() bb_show_usage()
static void fatal2_cannot(const char *m1, const char *m2)
{
bb_perror_msg_and_die("%s: fatal: cannot %s%s", dir, m1, m2);
@@ -88,10 +86,6 @@ static void warn_cannot(const char *m)
{
bb_perror_msg("%s: warning: cannot %s", dir, m);
}
static void warnx_cannot(const char *m)
{
bb_error_msg("%s: warning: cannot %s", dir, m);
}
static void s_child(int sig_no)
{
@@ -132,11 +126,19 @@ static int rename_or_warn(const char *old, const char *new)
return 0;
}
#define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
#include <sys/syscall.h>
static void gettimeofday_ns(struct timespec *ts)
{
syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
}
static void update_status(struct svdir *s)
{
unsigned long l;
ssize_t sz;
int fd;
char status[20];
svstatus_t status;
/* pid */
if (pidchanged) {
@@ -194,38 +196,27 @@ static void update_status(struct svdir *s)
s->islog ? "log/supervise/stat" : "log/supervise/stat"+4);
/* supervise compatibility */
taia_pack(status, &s->start);
l = (unsigned long)s->pid;
status[12] = l; l >>=8;
status[13] = l; l >>=8;
status[14] = l; l >>=8;
status[15] = l;
memset(&status, 0, sizeof(status));
status.time_be64 = SWAP_BE64(s->start.tv_sec + 0x400000000000000aULL);
status.time_nsec_be32 = SWAP_BE32(s->start.tv_nsec);
status.pid_le32 = SWAP_LE32(s->pid);
if (s->ctrl & C_PAUSE)
status[16] = 1;
else
status[16] = 0;
status.paused = 1;
if (s->want == W_UP)
status[17] = 'u';
status.want = 'u';
else
status[17] = 'd';
status.want = 'd';
if (s->ctrl & C_TERM)
status[18] = 1;
else
status[18] = 0;
status[19] = s->state;
status.got_term = 1;
status.run_or_finish = s->state;
fd = open_trunc_or_warn("supervise/status.new");
if (fd < 0)
return;
l = write(fd, status, sizeof(status));
if (l < 0) {
warn_cannot("write supervise/status.new");
close(fd);
unlink("supervise/status.new");
return;
}
sz = write(fd, &status, sizeof(status));
close(fd);
if (l < sizeof(status)) {
warnx_cannot("write supervise/status.new: partial write");
if (sz != sizeof(status)) {
warn_cannot("write supervise/status.new");
unlink("supervise/status.new");
return;
}
rename_or_warn("supervise/status.new",
@@ -329,7 +320,7 @@ static void startservice(struct svdir *s)
fatal2_cannot(s->islog ? "start log/" : "start ", *run);
}
if (s->state != S_FINISH) {
taia_now(&s->start);
gettimeofday_ns(&s->start);
s->state = S_RUN;
}
s->pid = p;
@@ -346,39 +337,48 @@ static int ctrl(struct svdir *s, char c)
case 'd': /* down */
s->want = W_DOWN;
update_status(s);
if (s->pid && s->state != S_FINISH) stopservice(s);
if (s->pid && s->state != S_FINISH)
stopservice(s);
break;
case 'u': /* up */
s->want = W_UP;
update_status(s);
if (s->pid == 0) startservice(s);
if (s->pid == 0)
startservice(s);
break;
case 'x': /* exit */
if (s->islog) break;
if (s->islog)
break;
s->want = W_EXIT;
update_status(s);
/* FALLTHROUGH */
case 't': /* sig term */
if (s->pid && s->state != S_FINISH) stopservice(s);
if (s->pid && s->state != S_FINISH)
stopservice(s);
break;
case 'k': /* sig kill */
if (s->pid && !custom(s, c)) kill(s->pid, SIGKILL);
if (s->pid && !custom(s, c))
kill(s->pid, SIGKILL);
s->state = S_DOWN;
break;
case 'p': /* sig pause */
if (s->pid && !custom(s, c)) kill(s->pid, SIGSTOP);
if (s->pid && !custom(s, c))
kill(s->pid, SIGSTOP);
s->ctrl |= C_PAUSE;
update_status(s);
break;
case 'c': /* sig cont */
if (s->pid && !custom(s, c)) kill(s->pid, SIGCONT);
if (s->ctrl & C_PAUSE) s->ctrl &= ~C_PAUSE;
if (s->pid && !custom(s, c))
kill(s->pid, SIGCONT);
if (s->ctrl & C_PAUSE)
s->ctrl &= ~C_PAUSE;
update_status(s);
break;
case 'o': /* once */
s->want = W_DOWN;
update_status(s);
if (!s->pid) startservice(s);
if (!s->pid)
startservice(s);
break;
case 'a': /* sig alarm */
sig = SIGALRM;
@@ -414,7 +414,8 @@ int runsv_main(int argc, char **argv)
int r;
char buf[256];
if (!argv[1] || argv[2]) usage();
if (!argv[1] || argv[2])
bb_show_usage();
dir = argv[1];
xpipe(selfpipe);
@@ -435,22 +436,23 @@ int runsv_main(int argc, char **argv)
if (W_UP) svd[0].want = W_UP;
/* bss: svd[0].islog = 0; */
/* bss: svd[1].pid = 0; */
taia_now(&svd[0].start);
gettimeofday_ns(&svd[0].start);
if (stat("down", &s) != -1) svd[0].want = W_DOWN;
if (stat("log", &s) == -1) {
if (errno != ENOENT)
warn_cannot("stat ./log");
} else {
if (!S_ISDIR(s.st_mode))
warnx_cannot("stat log/down: log is not a directory");
else {
if (!S_ISDIR(s.st_mode)) {
errno = 0;
warn_cannot("stat log/down: log is not a directory");
} else {
haslog = 1;
svd[1].state = S_DOWN;
svd[1].ctrl = C_NOOP;
svd[1].want = W_UP;
svd[1].islog = 1;
taia_now(&svd[1].start);
gettimeofday_ns(&svd[1].start);
if (stat("log/down", &s) != -1)
svd[1].want = W_DOWN;
xpipe(logpipe);
@@ -525,9 +527,8 @@ int runsv_main(int argc, char **argv)
coe(fd);
}
for (;;) {
iopause_fd x[3];
struct taia deadline;
struct taia now;
struct pollfd x[3];
unsigned deadline;
char ch;
if (haslog)
@@ -538,32 +539,30 @@ int runsv_main(int argc, char **argv)
startservice(&svd[0]);
x[0].fd = selfpipe[0];
x[0].events = IOPAUSE_READ;
x[0].events = POLLIN;
x[1].fd = svd[0].fdcontrol;
x[1].events = IOPAUSE_READ;
if (haslog) {
x[2].fd = svd[1].fdcontrol;
x[2].events = IOPAUSE_READ;
}
taia_now(&now);
taia_uint(&deadline, 3600);
taia_add(&deadline, &now, &deadline);
x[1].events = POLLIN;
/* x[2] is used only if haslog == 1 */
x[2].fd = svd[1].fdcontrol;
x[2].events = POLLIN;
sig_unblock(SIGTERM);
sig_unblock(SIGCHLD);
iopause(x, 2+haslog, &deadline, &now);
poll(x, 2 + haslog, 3600*1000);
sig_block(SIGTERM);
sig_block(SIGCHLD);
while (read(selfpipe[0], &ch, 1) == 1)
;
continue;
for (;;) {
int child;
int wstat;
child = wait_nohang(&wstat);
if (!child) break;
if ((child == -1) && (errno != EINTR)) break;
if (!child)
break;
if ((child == -1) && (errno != EINTR))
break;
if (child == svd[0].pid) {
svd[0].pid = 0;
pidchanged = 1;
@@ -578,11 +577,11 @@ int runsv_main(int argc, char **argv)
}
}
svd[0].state = S_DOWN;
taia_uint(&deadline, 1);
taia_add(&deadline, &svd[0].start, &deadline);
taia_now(&svd[0].start);
deadline = svd[0].start.tv_sec + 1;
gettimeofday_ns(&svd[0].start);
update_status(&svd[0]);
if (taia_less(&svd[0].start, &deadline)) sleep(1);
if (LESS(svd[0].start.tv_sec, deadline))
sleep(1);
}
if (haslog) {
if (child == svd[1].pid) {
@@ -590,11 +589,11 @@ int runsv_main(int argc, char **argv)
pidchanged = 1;
svd[1].state = S_DOWN;
svd[1].ctrl &= ~C_TERM;
taia_uint(&deadline, 1);
taia_add(&deadline, &svd[1].start, &deadline);
taia_now(&svd[1].start);
deadline = svd[1].start.tv_sec + 1;
gettimeofday_ns(&svd[1].start);
update_status(&svd[1]);
if (taia_less(&svd[1].start, &deadline)) sleep(1);
if (LESS(svd[1].start.tv_sec, deadline))
sleep(1);
}
}
}
@@ -618,10 +617,6 @@ int runsv_main(int argc, char **argv)
update_status(&svd[1]);
close(logpipe[1]);
close(logpipe[0]);
//if (close(logpipe[1]) == -1)
// warn_cannot("close logpipe[1]");
//if (close(logpipe[0]) == -1)
// warn_cannot("close logpipe[0]");
}
}
}