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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-20 17:27:40 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-20 17:27:40 +0000
commit45946f8b513d9c292613ac08c3ddf4a89b915752 (patch)
treed6ea51887431e4261a114b95989950d1973d3227 /runit/runsv.c
parent63db27f9f4c0ec8b9abe3c32c8d699be0781ffd6 (diff)
downloadbusybox-45946f8b513d9c292613ac08c3ddf4a89b915752.tar.gz
busybox-45946f8b513d9c292613ac08c3ddf4a89b915752.tar.bz2
runit/*: get rid of tai[a] time abstraction, it's too bloaty.
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
Diffstat (limited to 'runit/runsv.c')
-rw-r--r--runit/runsv.c151
1 files changed, 73 insertions, 78 deletions
diff --git a/runit/runsv.c b/runit/runsv.c
index f70b51390..baef6e13f 100644
--- a/runit/runsv.c
+++ b/runit/runsv.c
@@ -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) {
@@ -194,40 +196,29 @@ 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) {
+ sz = write(fd, &status, sizeof(status));
+ close(fd);
+ if (sz != sizeof(status)) {
warn_cannot("write supervise/status.new");
- close(fd);
unlink("supervise/status.new");
return;
}
- close(fd);
- if (l < sizeof(status)) {
- warnx_cannot("write supervise/status.new: partial write");
- return;
- }
rename_or_warn("supervise/status.new",
s->islog ? "log/supervise/status" : "log/supervise/status"+4);
}
@@ -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]");
}
}
}