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forgot about avn add... :(

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This commit is contained in:
Denis Vlasenko 2006-11-17 18:58:49 +00:00
parent 8a00f44bf4
commit 04c6386c45
3 changed files with 1279 additions and 0 deletions
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613
runit/runsv.c Normal file
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/* Busyboxed by Denis Vlasenko <vda.linux@googlemail.com> */
/* TODO: depends on runit_lib.c - review and reduce/eliminate */
#include <sys/poll.h>
#include <sys/file.h>
#include "busybox.h"
#include "runit_lib.h"
static int selfpipe[2];
/* state */
#define S_DOWN 0
#define S_RUN 1
#define S_FINISH 2
/* ctrl */
#define C_NOOP 0
#define C_TERM 1
#define C_PAUSE 2
/* want */
#define W_UP 0
#define W_DOWN 1
#define W_EXIT 2
struct svdir {
int pid;
int state;
int ctrl;
int want;
struct taia start;
int fdlock;
int fdcontrol;
int fdcontrolwrite;
int islog;
};
static struct svdir svd[2];
static int sigterm = 0;
static int haslog = 0;
static int pidchanged = 1;
static int logpipe[2];
static char *dir;
#define usage() bb_show_usage()
static void fatal2_cannot(char *m1, char *m2)
{
bb_perror_msg_and_die("%s: fatal: cannot %s%s", dir, m1, m2);
/* was exiting 111 */
}
static void fatal_cannot(char *m)
{
fatal2_cannot(m, "");
/* was exiting 111 */
}
static void fatal2x_cannot(char *m1, char *m2)
{
bb_error_msg_and_die("%s: fatal: cannot %s%s", dir, m1, m2);
/* was exiting 111 */
}
static void warn_cannot(char *m)
{
bb_perror_msg("%s: warning: cannot %s", dir, m);
}
static void warnx_cannot(char *m)
{
bb_error_msg("%s: warning: cannot %s", dir, m);
}
static void stopservice(struct svdir *);
static void s_child(int sig_no)
{
write(selfpipe[1], "", 1);
}
static void s_term(int sig_no)
{
sigterm = 1;
write(selfpipe[1], "", 1); /* XXX */
}
static char *add_str(char *p, const char *to_add)
{
while ((*p = *to_add) != '\0') {
p++;
to_add++;
}
return p;
}
static int open_trunc_or_warn(const char *name)
{
int fd = open_trunc(name);
if (fd < 0)
bb_perror_msg("%s: warning: cannot open %s",
dir, name);
return fd;
}
static int rename_or_warn(const char *old, const char *new)
{
if (rename(old, new) == -1) {
bb_perror_msg("%s: warning: cannot rename %s to %s",
dir, old, new);
return -1;
}
return 0;
}
static void update_status(struct svdir *s)
{
unsigned long l;
int fd;
char status[20];
/* pid */
if (pidchanged) {
fd = open_trunc_or_warn("supervise/pid.new");
if (fd < 0)
return;
if (s->pid) {
char spid[sizeof(s->pid)*3 + 2];
int size = sprintf(spid, "%d\n", s->pid);
write(fd, spid, size);
}
close(fd);
if (s->islog) {
if (rename_or_warn("supervise/pid.new", "log/supervise/pid"))
return;
} else if (rename_or_warn("supervise/pid.new", "supervise/pid")) {
return;
}
pidchanged = 0;
}
/* stat */
fd = open_trunc_or_warn("supervise/stat.new");
if (fd < -1)
return;
{
char stat_buf[sizeof("finish, paused, got TERM, want down\n")];
char *p = stat_buf;
switch (s->state) {
case S_DOWN:
p = add_str(p, "down");
break;
case S_RUN:
p = add_str(p, "run");
break;
case S_FINISH:
p = add_str(p, "finish");
break;
}
if (s->ctrl & C_PAUSE) p = add_str(p, ", paused");
if (s->ctrl & C_TERM) p = add_str(p, ", got TERM");
if (s->state != S_DOWN)
switch(s->want) {
case W_DOWN:
p = add_str(p, ", want down");
break;
case W_EXIT:
p = add_str(p, ", want exit");
break;
}
*p++ = '\n';
write(fd, stat_buf, p - stat_buf);
close(fd);
}
if (s->islog) {
rename_or_warn("supervise/stat.new", "log/supervise/stat");
} else {
rename_or_warn("supervise/stat.new", "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;
if (s->ctrl & C_PAUSE)
status[16] = 1;
else
status[16] = 0;
if (s->want == W_UP)
status[17] = 'u';
else
status[17] = 'd';
if (s->ctrl & C_TERM)
status[18] = 1;
else
status[18] = 0;
status[19] = 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;
}
close(fd);
if (l < sizeof status) {
warnx_cannot("write supervise/status.new: partial write");
return;
}
if (s->islog) {
rename_or_warn("supervise/status.new", "log/supervise/status");
} else {
rename_or_warn("supervise/status.new", "log/supervise/status"+4);
}
}
static unsigned custom(struct svdir *s, char c)
{
int pid;
int w;
char a[10];
struct stat st;
char *prog[2];
if (s->islog) return 0;
memcpy(a, "control/?", 10);
a[8] = c;
if (stat(a, &st) == 0) {
if (st.st_mode & S_IXUSR) {
pid = fork();
if (pid == -1) {
warn_cannot("fork for control/?");
return 0;
}
if (!pid) {
if (haslog && fd_copy(1, logpipe[1]) == -1)
warn_cannot("setup stdout for control/?");
prog[0] = a;
prog[1] = 0;
execve(a, prog, environ);
fatal_cannot("run control/?");
}
while (wait_pid(&w, pid) == -1) {
if (errno == EINTR) continue;
warn_cannot("wait for child control/?");
return 0;
}
return !wait_exitcode(w);
}
}
else {
if (errno == ENOENT) return 0;
warn_cannot("stat control/?");
}
return 0;
}
static void stopservice(struct svdir *s)
{
if (s->pid && ! custom(s, 't')) {
kill(s->pid, SIGTERM);
s->ctrl |=C_TERM;
update_status(s);
}
if (s->want == W_DOWN) {
kill(s->pid, SIGCONT);
custom(s, 'd'); return;
}
if (s->want == W_EXIT) {
kill(s->pid, SIGCONT);
custom(s, 'x');
}
}
static void startservice(struct svdir *s)
{
int p;
char *run[2];
if (s->state == S_FINISH)
run[0] = "./finish";
else {
run[0] = "./run";
custom(s, 'u');
}
run[1] = 0;
if (s->pid != 0) stopservice(s); /* should never happen */
while ((p = fork()) == -1) {
warn_cannot("fork, sleeping");
sleep(5);
}
if (p == 0) {
/* child */
if (haslog) {
if (s->islog) {
if (fd_copy(0, logpipe[0]) == -1)
fatal_cannot("setup filedescriptor for ./log/run");
close(logpipe[1]);
if (chdir("./log") == -1)
fatal_cannot("change directory to ./log");
} else {
if (fd_copy(1, logpipe[1]) == -1)
fatal_cannot("setup filedescriptor for ./run");
close(logpipe[0]);
}
}
sig_uncatch(sig_child);
sig_unblock(sig_child);
sig_uncatch(sig_term);
sig_unblock(sig_term);
execve(*run, run, environ);
if (s->islog)
fatal2_cannot("start log/", *run);
else
fatal2_cannot("start ", *run);
}
if (s->state != S_FINISH) {
taia_now(&s->start);
s->state = S_RUN;
}
s->pid = p;
pidchanged = 1;
s->ctrl = C_NOOP;
update_status(s);
}
static int ctrl(struct svdir *s, char c)
{
switch(c) {
case 'd': /* down */
s->want = W_DOWN;
update_status(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);
break;
case 'x': /* exit */
if (s->islog) break;
s->want = W_EXIT;
update_status(s);
if (s->pid && s->state != S_FINISH) stopservice(s);
break;
case 't': /* sig term */
if (s->pid && s->state != S_FINISH) stopservice(s);
break;
case 'k': /* sig kill */
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);
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;
update_status(s);
break;
case 'o': /* once */
s->want = W_DOWN;
update_status(s);
if (!s->pid) startservice(s);
break;
case 'a': /* sig alarm */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGALRM);
break;
case 'h': /* sig hup */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGHUP);
break;
case 'i': /* sig int */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGINT);
break;
case 'q': /* sig quit */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGQUIT);
break;
case '1': /* sig usr1 */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGUSR1);
break;
case '2': /* sig usr2 */
if (s->pid && ! custom(s, c)) kill(s->pid, SIGUSR2);
break;
}
return 1;
}
int runsv_main(int argc, char **argv)
{
struct stat s;
int fd;
int r;
char buf[256];
if (!argv[1] || argv[2]) usage();
dir = argv[1];
if (pipe(selfpipe) == -1) fatal_cannot("create selfpipe");
coe(selfpipe[0]);
coe(selfpipe[1]);
ndelay_on(selfpipe[0]);
ndelay_on(selfpipe[1]);
sig_block(sig_child);
sig_catch(sig_child, s_child);
sig_block(sig_term);
sig_catch(sig_term, s_term);
xchdir(dir);
svd[0].pid = 0;
svd[0].state = S_DOWN;
svd[0].ctrl = C_NOOP;
svd[0].want = W_UP;
svd[0].islog = 0;
svd[1].pid = 0;
taia_now(&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 {
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);
if (stat("log/down", &s) != -1)
svd[1].want = W_DOWN;
if (pipe(logpipe) == -1)
fatal_cannot("create log pipe");
coe(logpipe[0]);
coe(logpipe[1]);
}
}
if (mkdir("supervise", 0700) == -1) {
r = readlink("supervise", buf, 256);
if (r != -1) {
if (r == 256)
fatal2x_cannot("readlink ./supervise: ", "name too long");
buf[r] = 0;
mkdir(buf, 0700);
} else {
if ((errno != ENOENT) && (errno != EINVAL))
fatal_cannot("readlink ./supervise");
}
}
svd[0].fdlock = xopen3("log/supervise/lock"+4,
O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
if (lock_exnb(svd[0].fdlock) == -1)
fatal_cannot("lock supervise/lock");
coe(svd[0].fdlock);
if (haslog) {
if (mkdir("log/supervise", 0700) == -1) {
r = readlink("log/supervise", buf, 256);
if (r != -1) {
if (r == 256)
fatal2x_cannot("readlink ./log/supervise: ", "name too long");
buf[r] = 0;
fd = xopen(".", O_RDONLY|O_NDELAY);
xchdir("./log");
mkdir(buf, 0700);
if (fchdir(fd) == -1)
fatal_cannot("change back to service directory");
close(fd);
}
else {
if ((errno != ENOENT) && (errno != EINVAL))
fatal_cannot("readlink ./log/supervise");
}
}
svd[1].fdlock = xopen3("log/supervise/lock",
O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
if (lock_ex(svd[1].fdlock) == -1)
fatal_cannot("lock log/supervise/lock");
coe(svd[1].fdlock);
}
fifo_make("log/supervise/control"+4, 0600);
svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY);
coe(svd[0].fdcontrol);
svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY);
coe(svd[0].fdcontrolwrite);
update_status(&svd[0]);
if (haslog) {
fifo_make("log/supervise/control", 0600);
svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY);
coe(svd[1].fdcontrol);
svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY);
coe(svd[1].fdcontrolwrite);
update_status(&svd[1]);
}
fifo_make("log/supervise/ok"+4, 0600);
fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY);
coe(fd);
if (haslog) {
fifo_make("log/supervise/ok", 0600);
fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY);
coe(fd);
}
for (;;) {
iopause_fd x[3];
struct taia deadline;
struct taia now;
char ch;
if (haslog)
if (!svd[1].pid && svd[1].want == W_UP)
startservice(&svd[1]);
if (!svd[0].pid)
if (svd[0].want == W_UP || svd[0].state == S_FINISH)
startservice(&svd[0]);
x[0].fd = selfpipe[0];
x[0].events = IOPAUSE_READ;
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);
sig_unblock(sig_term);
sig_unblock(sig_child);
iopause(x, 2+haslog, &deadline, &now);
sig_block(sig_term);
sig_block(sig_child);
while (read(selfpipe[0], &ch, 1) == 1)
;
for (;;) {
int child;
int wstat;
child = wait_nohang(&wstat);
if (!child) break;
if ((child == -1) && (errno != EINTR)) break;
if (child == svd[0].pid) {
svd[0].pid = 0;
pidchanged = 1;
svd[0].ctrl &=~C_TERM;
if (svd[0].state != S_FINISH)
fd = open_read("finish");
if (fd != -1) {
close(fd);
svd[0].state = S_FINISH;
update_status(&svd[0]);
continue;
}
svd[0].state = S_DOWN;
taia_uint(&deadline, 1);
taia_add(&deadline, &svd[0].start, &deadline);
taia_now(&svd[0].start);
update_status(&svd[0]);
if (taia_less(&svd[0].start, &deadline)) sleep(1);
}
if (haslog) {
if (child == svd[1].pid) {
svd[1].pid = 0;
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);
update_status(&svd[1]);
if (taia_less(&svd[1].start, &deadline)) sleep(1);
}
}
}
if (read(svd[0].fdcontrol, &ch, 1) == 1)
ctrl(&svd[0], ch);
if (haslog)
if (read(svd[1].fdcontrol, &ch, 1) == 1)
ctrl(&svd[1], ch);
if (sigterm) {
ctrl(&svd[0], 'x');
sigterm = 0;
}
if (svd[0].want == W_EXIT && svd[0].state == S_DOWN) {
if (svd[1].pid == 0)
_exit(0);
if (svd[1].want != W_EXIT) {
svd[1].want = W_EXIT;
/* stopservice(&svd[1]); */
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]");
}
}
}
/* not reached */
return 0;
}

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/* Busyboxed by Denis Vlasenko <vda.linux@googlemail.com> */
/* TODO: depends on runit_lib.c - review and reduce/eliminate */
#include <sys/poll.h>
#include <sys/file.h>
#include "busybox.h"
#include "runit_lib.h"
#define MAXSERVICES 1000
static char *svdir;
static unsigned long dev;
static unsigned long ino;
static struct service {
unsigned long dev;
unsigned long ino;
int pid;
int isgone;
} *sv;
static int svnum;
static int check = 1;
static char *rplog;
static int rploglen;
static int logpipe[2];
static iopause_fd io[1];
static struct taia stamplog;
static int exitsoon;
static int pgrp;
#define usage() bb_show_usage()
static void fatal2_cannot(char *m1, char *m2)
{
bb_perror_msg_and_die("%s: fatal: cannot %s%s", svdir, m1, m2);
/* was exiting 100 */
}
static void warn3x(char *m1, char *m2, char *m3)
{
bb_error_msg("%s: warning: %s%s%s", svdir, m1, m2, m3);
}
static void warn2_cannot(char *m1, char *m2)
{
warn3x("cannot ", m1, m2);
}
static void warnx(char *m1)
{
warn3x(m1, "", "");
}
static void s_term(int sig_no)
{
exitsoon = 1;
}
static void s_hangup(int sig_no)
{
exitsoon = 2;
}
static void runsv(int no, char *name)
{
int pid = fork();
if (pid == -1) {
warn2_cannot("fork for ", name);
return;
}
if (pid == 0) {
/* child */
char *prog[3];
prog[0] = "runsv";
prog[1] = name;
prog[2] = 0;
sig_uncatch(sig_hangup);
sig_uncatch(sig_term);
if (pgrp) setsid();
execvp(prog[0], prog);
//pathexec_run(*prog, prog, (char* const*)environ);
fatal2_cannot("start runsv ", name);
}
sv[no].pid = pid;
}
static void runsvdir(void)
{
DIR *dir;
direntry *d;
int i;
struct stat s;
dir = opendir(".");
if (!dir) {
warn2_cannot("open directory ", svdir);
return;
}
for (i = 0; i < svnum; i++)
sv[i].isgone = 1;
errno = 0;
while ((d = readdir(dir))) {
if (d->d_name[0] == '.') 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)) {
sv[i].isgone = 0;
if (!sv[i].pid)
runsv(i, d->d_name);
break;
}
}
if (i == svnum) {
/* new service */
struct service *svnew = realloc(sv, (i+1) * sizeof(*sv));
if (!svnew) {
warn3x("cannot start runsv ", d->d_name,
" too many services");
continue;
}
sv = svnew;
svnum++;
memset(&sv[i], 0, sizeof(sv[i]));
sv[i].ino = s.st_ino;
sv[i].dev = s.st_dev;
//sv[i].pid = 0;
//sv[i].isgone = 0;
runsv(i, d->d_name);
check = 1;
}
}
if (errno) {
warn2_cannot("read directory ", svdir);
closedir(dir);
check = 1;
return;
}
closedir(dir);
/* SIGTERM removed runsv's */
for (i = 0; i < svnum; i++) {
if (!sv[i].isgone)
continue;
if (sv[i].pid)
kill(sv[i].pid, SIGTERM);
sv[i] = sv[--svnum];
check = 1;
}
}
static int setup_log(void)
{
rploglen = strlen(rplog);
if (rploglen < 7) {
warnx("log must have at least seven characters");
return 0;
}
if (pipe(logpipe) == -1) {
warnx("cannot create pipe for log");
return -1;
}
coe(logpipe[1]);
coe(logpipe[0]);
ndelay_on(logpipe[0]);
ndelay_on(logpipe[1]);
if (fd_copy(2, logpipe[1]) == -1) {
warnx("cannot set filedescriptor for log");
return -1;
}
io[0].fd = logpipe[0];
io[0].events = IOPAUSE_READ;
taia_now(&stamplog);
return 1;
}
int runsvdir_main(int argc, char **argv)
{
struct stat s;
time_t mtime = 0;
int wstat;
int curdir;
int pid;
struct taia deadline;
struct taia now;
struct taia stampcheck;
char ch;
int i;
argv++;
if (!argv || !*argv) usage();
if (**argv == '-') {
switch (*(*argv + 1)) {
case 'P': pgrp = 1;
case '-': ++argv;
}
if (!argv || !*argv) usage();
}
sig_catch(sig_term, s_term);
sig_catch(sig_hangup, s_hangup);
svdir = *argv++;
if (argv && *argv) {
rplog = *argv;
if (setup_log() != 1) {
rplog = 0;
warnx("log service disabled");
}
}
curdir = open_read(".");
if (curdir == -1)
fatal2_cannot("open current directory", "");
coe(curdir);
taia_now(&stampcheck);
for (;;) {
/* collect children */
for (;;) {
pid = wait_nohang(&wstat);
if (pid <= 0) break;
for (i = 0; i < svnum; i++) {
if (pid == sv[i].pid) {
/* runsv has gone */
sv[i].pid = 0;
check = 1;
break;
}
}
}
taia_now(&now);
if (now.sec.x < (stampcheck.sec.x - 3)) {
/* time warp */
warnx("time warp: resetting time stamp");
taia_now(&stampcheck);
taia_now(&now);
if (rplog) taia_now(&stamplog);
}
if (taia_less(&now, &stampcheck) == 0) {
/* wait at least a second */
taia_uint(&deadline, 1);
taia_add(&stampcheck, &now, &deadline);
if (stat(svdir, &s) != -1) {
if (check || s.st_mtime != mtime
|| s.st_ino != ino || s.st_dev != dev
) {
/* svdir modified */
if (chdir(svdir) != -1) {
mtime = s.st_mtime;
dev = s.st_dev;
ino = s.st_ino;
check = 0;
if (now.sec.x <= (4611686018427387914ULL + (uint64_t)mtime))
sleep(1);
runsvdir();
while (fchdir(curdir) == -1) {
warn2_cannot("change directory, pausing", "");
sleep(5);
}
} else
warn2_cannot("change directory to ", svdir);
}
} else
warn2_cannot("stat ", svdir);
}
if (rplog) {
if (taia_less(&now, &stamplog) == 0) {
write(logpipe[1], ".", 1);
taia_uint(&deadline, 900);
taia_add(&stamplog, &now, &deadline);
}
}
taia_uint(&deadline, check ? 1 : 5);
taia_add(&deadline, &now, &deadline);
sig_block(sig_child);
if (rplog)
iopause(io, 1, &deadline, &now);
else
iopause(0, 0, &deadline, &now);
sig_unblock(sig_child);
if (rplog && (io[0].revents | IOPAUSE_READ))
while (read(logpipe[0], &ch, 1) > 0)
if (ch) {
for (i = 6; i < rploglen; i++)
rplog[i-1] = rplog[i];
rplog[rploglen-1] = ch;
}
switch (exitsoon) {
case 1:
_exit(0);
case 2:
for (i = 0; i < svnum; i++)
if (sv[i].pid)
kill(sv[i].pid, SIGTERM);
_exit(111);
}
}
/* not reached */
return 0;
}

360
runit/sv.c Normal file
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@ -0,0 +1,360 @@
/* Busyboxed by Denis Vlasenko <vda.linux@googlemail.com> */
/* TODO: depends on runit_lib.c - review and reduce/eliminate */
#include <sys/poll.h>
#include <sys/file.h>
#include "busybox.h"
#include "runit_lib.h"
static char *action;
static char *acts;
static char *varservice = "/var/service/";
static char **service;
static char **servicex;
static unsigned services;
static unsigned rc = 0;
static unsigned verbose = 0;
static unsigned long waitsec = 7;
static unsigned kll = 0;
static struct taia tstart, tnow, tdiff;
static struct tai tstatus;
static int (*act)(char*) = 0;
static int (*cbk)(char*) = 0;
static int curdir, fd, r;
static char svstatus[20];
#define usage() bb_show_usage()
static void fatal_cannot(char *m1)
{
bb_perror_msg("fatal: cannot %s", m1);
_exit(151);
}
static void out(char *p, char *m1)
{
printf("%s%s: %s", p, *service, m1);
if (errno) {
printf(": %s", strerror(errno));
}
puts(""); /* will also flush the output */
}
#define FAIL "fail: "
#define WARN "warning: "
#define OK "ok: "
#define RUN "run: "
#define FINISH "finish: "
#define DOWN "down: "
#define TIMEOUT "timeout: "
#define KILL "kill: "
static void fail(char *m1) { ++rc; out(FAIL, m1); }
static void failx(char *m1) { errno = 0; fail(m1); }
static void warn_cannot(char *m1) { ++rc; out("warning: cannot ", m1); }
static void warnx_cannot(char *m1) { errno = 0; warn_cannot(m1); }
static void ok(char *m1) { errno = 0; out(OK, m1); }
static int svstatus_get(void)
{
if ((fd = open_write("supervise/ok")) == -1) {
if (errno == ENODEV) {
*acts == 'x' ? ok("runsv not running")
: failx("runsv not running");
return 0;
}
warn_cannot("open supervise/ok");
return -1;
}
close(fd);
if ((fd = open_read("supervise/status")) == -1) {
warn_cannot("open supervise/status");
return -1;
}
r = read(fd, svstatus, 20);
close(fd);
switch(r) {
case 20: break;
case -1: warn_cannot("read supervise/status"); return -1;
default: warnx_cannot("read supervise/status: bad format"); return -1;
}
return 1;
}
static unsigned svstatus_print(char *m)
{
int pid;
int normallyup = 0;
struct stat s;
if (stat("down", &s) == -1) {
if (errno != ENOENT) {
bb_perror_msg(WARN"cannot stat %s/down", *service);
return 0;
}
normallyup = 1;
}
pid = (unsigned char) svstatus[15];
pid <<= 8; pid += (unsigned char)svstatus[14];
pid <<= 8; pid += (unsigned char)svstatus[13];
pid <<= 8; pid += (unsigned char)svstatus[12];
tai_unpack(svstatus, &tstatus);
if (pid) {
switch (svstatus[19]) {
case 1: printf(RUN); break;
case 2: printf(FINISH); break;
}
printf("%s: (pid %d) ", m, pid);
}
else {
printf(DOWN"%s: ", m);
}
printf("%lus", (unsigned long)(tnow.sec.x < tstatus.x ? 0 : tnow.sec.x-tstatus.x));
if (pid && !normallyup) printf(", normally down");
if (!pid && normallyup) printf(", normally up");
if (pid && svstatus[16]) printf(", paused");
if (!pid && (svstatus[17] == 'u')) printf(", want up");
if (pid && (svstatus[17] == 'd')) printf(", want down");
if (pid && svstatus[18]) printf(", got TERM");
return pid ? 1 : 2;
}
static int status(char *unused)
{
r = svstatus_get();
switch(r) { case -1: case 0: return 0; }
r = svstatus_print(*service);
if (chdir("log") == -1) {
if (errno != ENOENT) {
printf("; log: "WARN"cannot change to log service directory: %s",
strerror(errno));
}
} else if (svstatus_get()) {
printf("; ");
svstatus_print("log");
}
puts(""); /* will also flush the output */
return r;
}
static int checkscript(void)
{
char *prog[2];
struct stat s;
int pid, w;
if (stat("check", &s) == -1) {
if (errno == ENOENT) return 1;
bb_perror_msg(WARN"cannot stat %s/check", *service);
return 0;
}
/* if (!(s.st_mode & S_IXUSR)) return 1; */
if ((pid = fork()) == -1) {
bb_perror_msg(WARN"cannot fork for %s/check", *service);
return 0;
}
if (!pid) {
prog[0] = "./check";
prog[1] = 0;
close(1);
execve("check", prog, environ);
bb_perror_msg(WARN"cannot run %s/check", *service);
_exit(0);
}
while (wait_pid(&w, pid) == -1) {
if (errno == EINTR) continue;
bb_perror_msg(WARN"cannot wait for child %s/check", *service);
return 0;
}
return !wait_exitcode(w);
}
static int check(char *a)
{
unsigned pid;
if ((r = svstatus_get()) == -1) return -1;
if (r == 0) { if (*a == 'x') return 1; return -1; }
pid = (unsigned char)svstatus[15];
pid <<= 8; pid += (unsigned char)svstatus[14];
pid <<= 8; pid += (unsigned char)svstatus[13];
pid <<= 8; pid += (unsigned char)svstatus[12];
switch (*a) {
case 'x': return 0;
case 'u':
if (!pid || svstatus[19] != 1) return 0;
if (!checkscript()) return 0;
break;
case 'd': if (pid) return 0; break;
case 'c': if (pid) if (!checkscript()) return 0; break;
case 't':
if (!pid && svstatus[17] == 'd') break;
tai_unpack(svstatus, &tstatus);
if ((tstart.sec.x > tstatus.x) || !pid || svstatus[18] || !checkscript())
return 0;
break;
case 'o':
tai_unpack(svstatus, &tstatus);
if ((!pid && tstart.sec.x > tstatus.x) || (pid && svstatus[17] != 'd'))
return 0;
}
printf(OK); svstatus_print(*service); puts(""); /* will also flush the output */
return 1;
}
static int control(char *a)
{
if (svstatus_get() <= 0) return -1;
if (svstatus[17] == *a) return 0;
if ((fd = open_write("supervise/control")) == -1) {
if (errno != ENODEV)
warn_cannot("open supervise/control");
else
*a == 'x' ? ok("runsv not running") : failx("runsv not running");
return -1;
}
r = write(fd, a, strlen(a));
close(fd);
if (r != strlen(a)) {
warn_cannot("write to supervise/control");
return -1;
}
return 1;
}
int sv_main(int argc, char **argv)
{
unsigned opt;
unsigned i, want_exit;
char *x;
for (i = strlen(*argv); i; --i)
if ((*argv)[i-1] == '/')
break;
*argv += i;
service = argv;
services = 1;
if ((x = getenv("SVDIR"))) varservice = x;
if ((x = getenv("SVWAIT"))) waitsec = xatoul(x);
/* TODO: V can be handled internally by getopt_ulflags */
opt = getopt32(argc, argv, "w:vV", &x);
if (opt & 1) waitsec = xatoul(x);
if (opt & 2) verbose = 1;
if (opt & 4) usage();
if (!(action = *argv++)) usage();
--argc;
service = argv; services = argc;
if (!*service) usage();
taia_now(&tnow); tstart = tnow;
if ((curdir = open_read(".")) == -1)
fatal_cannot("open current directory");
act = &control; acts = "s";
if (verbose) cbk = &check;
switch (*action) {
case 'x': case 'e':
acts = "x"; break;
case 'X': case 'E':
acts = "x"; kll = 1; cbk = &check; break;
case 'D':
acts = "d"; kll = 1; cbk = &check; break;
case 'T':
acts = "tc"; kll = 1; cbk = &check; break;
case 'c':
if (!str_diff(action, "check")) {
act = 0;
acts = "c";
cbk = &check;
break;
}
case 'u': case 'd': case 'o': case 't': case 'p': case 'h':
case 'a': case 'i': case 'k': case 'q': case '1': case '2':
action[1] = 0; acts = action; break;
case 's':
if (!str_diff(action, "shutdown")) {
acts = "x";
cbk = &check;
break;
}
if (!str_diff(action, "start")) {
acts = "u";
cbk = &check;
break;
}
if (!str_diff(action, "stop")) {
acts = "d";
cbk = &check;
break;
}
act = &status; cbk = 0; break;
case 'r':
if (!str_diff(action, "restart")) {
acts = "tcu";
cbk = &check;
break;
}
usage();
case 'f':
if (!str_diff(action, "force-reload"))
{ acts = "tc"; kll = 1; cbk = &check; break; }
if (!str_diff(action, "force-restart"))
{ acts = "tcu"; kll = 1; cbk = &check; break; }
if (!str_diff(action, "force-shutdown"))
{ acts = "x"; kll = 1; cbk = &check; break; }
if (!str_diff(action, "force-stop"))
{ acts = "d"; kll = 1; cbk = &check; break; }
default:
usage();
}
servicex = service;
for (i = 0; i < services; ++i) {
if ((**service != '/') && (**service != '.')) {
if ((chdir(varservice) == -1) || (chdir(*service) == -1)) {
fail("cannot change to service directory");
*service = 0;
}
} else if (chdir(*service) == -1) {
fail("cannot change to service directory");
*service = 0;
}
if (*service) if (act && (act(acts) == -1)) *service = 0;
if (fchdir(curdir) == -1) fatal_cannot("change to original directory");
service++;
}
if (*cbk)
for (;;) {
taia_sub(&tdiff, &tnow, &tstart);
service = servicex; want_exit = 1;
for (i = 0; i < services; ++i, ++service) {
if (!*service) continue;
if ((**service != '/') && (**service != '.')) {
if ((chdir(varservice) == -1) || (chdir(*service) == -1)) {
fail("cannot change to service directory");
*service = 0;
}
} else if (chdir(*service) == -1) {
fail("cannot change to service directory");
*service = 0;
}
if (*service) { if (cbk(acts) != 0) *service = 0; else want_exit = 0; }
if (*service && taia_approx(&tdiff) > waitsec) {
kll ? printf(KILL) : printf(TIMEOUT);
if (svstatus_get() > 0) { svstatus_print(*service); ++rc; }
puts(""); /* will also flush the output */
if (kll) control("k");
*service = 0;
}
if (fchdir(curdir) == -1)
fatal_cannot("change to original directory");
}
if (want_exit) break;
usleep(420000);
taia_now(&tnow);
}
return rc > 99 ? 99 : rc;
}