runsvdir: conditionalize "log in argiment" (mis)feature. By Vladimir.
with: runsv 139 141 +2 runsvdir_main 1583 1513 -70 without: warn2_cannot 14 27 +13 runsv 139 141 +2 warnx 28 16 -12 warn3x 23 - -23 runsvdir_main 1583 1125 -458
This commit is contained in:
Denis Vlasenko
parent
30cfdf90ce
commit
923a79a769
@ -20,6 +20,15 @@ config RUNSVDIR
|
||||
a directory, in the services directory dir, up to a limit of 1000
|
||||
subdirectories, and restarts a runsv process if it terminates.
|
||||
|
||||
config FEATURE_RUNSVDIR_LOG
|
||||
bool "Enable scrolling argument log"
|
||||
depends on RUNSVDIR
|
||||
default n
|
||||
help
|
||||
Enable feature where second parameter of runsvdir holds last error
|
||||
message (viewable via top/ps). Otherwise (feature is off
|
||||
or no parameter), error messages go to stderr only.
|
||||
|
||||
config SV
|
||||
bool "sv"
|
||||
default n
|
||||
|
||||
127
runit/runsvdir.c
127
runit/runsvdir.c
@ -35,8 +35,13 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
#define MAXSERVICES 1000
|
||||
|
||||
/* Should be not needed - all dirs are on same FS, right? */
|
||||
#define CHECK_DEVNO_TOO 0
|
||||
|
||||
struct service {
|
||||
#if CHECK_DEVNO_TOO
|
||||
dev_t dev;
|
||||
#endif
|
||||
ino_t ino;
|
||||
pid_t pid;
|
||||
smallint isgone;
|
||||
@ -45,28 +50,30 @@ struct service {
|
||||
struct globals {
|
||||
struct service *sv;
|
||||
char *svdir;
|
||||
char *rplog;
|
||||
int svnum;
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
char *rplog;
|
||||
int rploglen;
|
||||
struct fd_pair logpipe;
|
||||
struct pollfd pfd[1];
|
||||
unsigned stamplog;
|
||||
smallint check; /* = 1; */
|
||||
#endif
|
||||
smallint need_rescan; /* = 1; */
|
||||
smallint set_pgrp;
|
||||
};
|
||||
#define G (*(struct globals*)&bb_common_bufsiz1)
|
||||
#define sv (G.sv )
|
||||
#define svdir (G.svdir )
|
||||
#define rplog (G.rplog )
|
||||
#define svnum (G.svnum )
|
||||
#define rplog (G.rplog )
|
||||
#define rploglen (G.rploglen )
|
||||
#define logpipe (G.logpipe )
|
||||
#define pfd (G.pfd )
|
||||
#define stamplog (G.stamplog )
|
||||
#define check (G.check )
|
||||
#define need_rescan (G.need_rescan )
|
||||
#define set_pgrp (G.set_pgrp )
|
||||
#define INIT_G() do { \
|
||||
check = 1; \
|
||||
need_rescan = 1; \
|
||||
} while (0)
|
||||
|
||||
static void fatal2_cannot(const char *m1, const char *m2)
|
||||
@ -82,10 +89,12 @@ static void warn2_cannot(const char *m1, const char *m2)
|
||||
{
|
||||
warn3x("cannot ", m1, m2);
|
||||
}
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
static void warnx(const char *m1)
|
||||
{
|
||||
warn3x(m1, "", "");
|
||||
}
|
||||
#endif
|
||||
|
||||
static void runsv(int no, const char *name)
|
||||
{
|
||||
@ -116,7 +125,7 @@ static void runsv(int no, const char *name)
|
||||
sv[no].pid = pid;
|
||||
}
|
||||
|
||||
static void runsvdir(void)
|
||||
static void do_rescan(void)
|
||||
{
|
||||
DIR *dir;
|
||||
direntry *d;
|
||||
@ -140,13 +149,16 @@ static void runsvdir(void)
|
||||
continue;
|
||||
if (stat(d->d_name, &s) == -1) {
|
||||
warn2_cannot("stat ", d->d_name);
|
||||
errno = 0;
|
||||
continue;
|
||||
}
|
||||
if (!S_ISDIR(s.st_mode))
|
||||
continue;
|
||||
for (i = 0; i < svnum; i++) {
|
||||
if ((sv[i].ino == s.st_ino) && (sv[i].dev == s.st_dev)) {
|
||||
if ((sv[i].ino == s.st_ino)
|
||||
#if CHECK_DEVNO_TOO
|
||||
&& (sv[i].dev == s.st_dev)
|
||||
#endif
|
||||
) {
|
||||
sv[i].isgone = 0;
|
||||
if (!sv[i].pid)
|
||||
runsv(i, d->d_name);
|
||||
@ -157,66 +169,43 @@ static void runsvdir(void)
|
||||
/* new service */
|
||||
struct service *svnew = realloc(sv, (i+1) * sizeof(*sv));
|
||||
if (!svnew) {
|
||||
warn3x("cannot start runsv ", d->d_name,
|
||||
" too many services");
|
||||
warn2_cannot("start runsv ", d->d_name);
|
||||
continue;
|
||||
}
|
||||
sv = svnew;
|
||||
svnum++;
|
||||
memset(&sv[i], 0, sizeof(sv[i]));
|
||||
sv[i].ino = s.st_ino;
|
||||
#if CHECK_DEVNO_TOO
|
||||
sv[i].dev = s.st_dev;
|
||||
#endif
|
||||
/*sv[i].pid = 0;*/
|
||||
/*sv[i].isgone = 0;*/
|
||||
runsv(i, d->d_name);
|
||||
check = 1;
|
||||
need_rescan = 1;
|
||||
}
|
||||
}
|
||||
if (errno) {
|
||||
warn2_cannot("read directory ", svdir);
|
||||
i = errno;
|
||||
closedir(dir);
|
||||
check = 1;
|
||||
if (i) {
|
||||
warn2_cannot("read directory ", svdir);
|
||||
need_rescan = 1;
|
||||
return;
|
||||
}
|
||||
closedir(dir);
|
||||
|
||||
/* SIGTERM removed runsv's */
|
||||
/* Send SIGTERM to runsv whose directories were not found (removed) */
|
||||
for (i = 0; i < svnum; i++) {
|
||||
if (!sv[i].isgone)
|
||||
continue;
|
||||
if (sv[i].pid)
|
||||
kill(sv[i].pid, SIGTERM);
|
||||
sv[i] = sv[--svnum];
|
||||
/* BUG? we deleted sv[i] by copying over sv[last], but we will not check this newly-copied one! */
|
||||
check = 1;
|
||||
svnum--;
|
||||
sv[i] = sv[svnum];
|
||||
i--; /* so that we don't skip new sv[i] (bug was here!) */
|
||||
need_rescan = 1;
|
||||
}
|
||||
}
|
||||
|
||||
static int setup_log(void)
|
||||
{
|
||||
rploglen = strlen(rplog);
|
||||
if (rploglen < 7) {
|
||||
warnx("log must have at least seven characters");
|
||||
return 0;
|
||||
}
|
||||
if (piped_pair(logpipe)) {
|
||||
warnx("cannot create pipe for log");
|
||||
return -1;
|
||||
}
|
||||
close_on_exec_on(logpipe.rd);
|
||||
close_on_exec_on(logpipe.wr);
|
||||
ndelay_on(logpipe.rd);
|
||||
ndelay_on(logpipe.wr);
|
||||
if (dup2(logpipe.wr, 2) == -1) {
|
||||
warnx("cannot set filedescriptor for log");
|
||||
return -1;
|
||||
}
|
||||
pfd[0].fd = logpipe.rd;
|
||||
pfd[0].events = POLLIN;
|
||||
stamplog = monotonic_sec();
|
||||
return 1;
|
||||
}
|
||||
|
||||
int runsvdir_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
||||
int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
{
|
||||
@ -230,7 +219,6 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
unsigned deadline;
|
||||
unsigned now;
|
||||
unsigned stampcheck;
|
||||
char ch;
|
||||
int i;
|
||||
|
||||
INIT_G();
|
||||
@ -241,13 +229,35 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
|
||||
bb_signals_recursive((1 << SIGTERM) | (1 << SIGHUP), record_signo);
|
||||
svdir = *argv++;
|
||||
if (argv && *argv) {
|
||||
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
/* setup log */
|
||||
if (*argv) {
|
||||
rplog = *argv;
|
||||
if (setup_log() != 1) {
|
||||
rplog = 0;
|
||||
rploglen = strlen(rplog);
|
||||
if (rploglen < 7) {
|
||||
warnx("log must have at least seven characters");
|
||||
} else if (piped_pair(logpipe)) {
|
||||
warnx("cannot create pipe for log");
|
||||
} else {
|
||||
close_on_exec_on(logpipe.rd);
|
||||
close_on_exec_on(logpipe.wr);
|
||||
ndelay_on(logpipe.rd);
|
||||
ndelay_on(logpipe.wr);
|
||||
if (dup2(logpipe.wr, 2) == -1) {
|
||||
warnx("cannot set filedescriptor for log");
|
||||
} else {
|
||||
pfd[0].fd = logpipe.rd;
|
||||
pfd[0].events = POLLIN;
|
||||
stamplog = monotonic_sec();
|
||||
goto run;
|
||||
}
|
||||
}
|
||||
rplog = NULL;
|
||||
warnx("log service disabled");
|
||||
}
|
||||
}
|
||||
run:
|
||||
#endif
|
||||
curdir = open_read(".");
|
||||
if (curdir == -1)
|
||||
fatal2_cannot("open current directory", "");
|
||||
@ -265,7 +275,7 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
if (pid == sv[i].pid) {
|
||||
/* runsv has gone */
|
||||
sv[i].pid = 0;
|
||||
check = 1;
|
||||
need_rescan = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -277,7 +287,7 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
stampcheck = now + 1;
|
||||
|
||||
if (stat(svdir, &s) != -1) {
|
||||
if (check || s.st_mtime != last_mtime
|
||||
if (need_rescan || s.st_mtime != last_mtime
|
||||
|| s.st_ino != last_ino || s.st_dev != last_dev
|
||||
) {
|
||||
/* svdir modified */
|
||||
@ -285,10 +295,10 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
last_mtime = s.st_mtime;
|
||||
last_dev = s.st_dev;
|
||||
last_ino = s.st_ino;
|
||||
check = 0;
|
||||
need_rescan = 0;
|
||||
//if (now <= mtime)
|
||||
// sleep(1);
|
||||
runsvdir();
|
||||
do_rescan();
|
||||
while (fchdir(curdir) == -1) {
|
||||
warn2_cannot("change directory, pausing", "");
|
||||
sleep(5);
|
||||
@ -300,23 +310,28 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
warn2_cannot("stat ", svdir);
|
||||
}
|
||||
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
if (rplog) {
|
||||
if ((int)(now - stamplog) >= 0) {
|
||||
write(logpipe.wr, ".", 1);
|
||||
stamplog = now + 900;
|
||||
}
|
||||
}
|
||||
|
||||
pfd[0].revents = 0;
|
||||
#endif
|
||||
sig_block(SIGCHLD);
|
||||
deadline = (check ? 1 : 5);
|
||||
deadline = (need_rescan ? 1 : 5);
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
if (rplog)
|
||||
poll(pfd, 1, deadline*1000);
|
||||
else
|
||||
#endif
|
||||
sleep(deadline);
|
||||
sig_unblock(SIGCHLD);
|
||||
|
||||
#if ENABLE_FEATURE_RUNSVDIR_LOG
|
||||
if (pfd[0].revents & POLLIN) {
|
||||
char ch;
|
||||
while (read(logpipe.rd, &ch, 1) > 0) {
|
||||
if (ch) {
|
||||
for (i = 6; i < rploglen; i++)
|
||||
@ -325,7 +340,7 @@ int runsvdir_main(int argc UNUSED_PARAM, char **argv)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
switch (bb_got_signal) {
|
||||
case SIGHUP:
|
||||
for (i = 0; i < svnum; i++)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user