ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* Busyboxed by Denis Vlasenko <vda.linux@googlemail.com> */
+/* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */
/* TODO: depends on runit_lib.c - review and reduce/eliminate */
#include <sys/poll.h>
/* Compare possibly overflowing unsigned counters */
#define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
-static int selfpipe[2];
-
/* state */
#define S_DOWN 0
#define S_RUN 1
int fdcontrolwrite;
};
-static struct svdir svd[2];
-static smallint sigterm;
-static smallint haslog;
-static smallint pidchanged = 1;
-static int logpipe[2];
-static char *dir;
+struct globals {
+ smallint haslog;
+ smallint sigterm;
+ smallint pidchanged;
+ struct fd_pair selfpipe;
+ struct fd_pair logpipe;
+ char *dir;
+ struct svdir svd[2];
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define haslog (G.haslog )
+#define sigterm (G.sigterm )
+#define pidchanged (G.pidchanged )
+#define selfpipe (G.selfpipe )
+#define logpipe (G.logpipe )
+#define dir (G.dir )
+#define svd (G.svd )
+#define INIT_G() do { \
+ pidchanged = 1; \
+} while (0)
static void fatal2_cannot(const char *m1, const char *m2)
{
bb_perror_msg("%s: warning: cannot %s", dir, m);
}
-static void s_child(int sig_no)
+static void s_child(int sig_no UNUSED_PARAM)
{
- write(selfpipe[1], "", 1);
+ write(selfpipe.wr, "", 1);
}
-static void s_term(int sig_no)
+static void s_term(int sig_no UNUSED_PARAM)
{
sigterm = 1;
- write(selfpipe[1], "", 1); /* XXX */
+ write(selfpipe.wr, "", 1); /* XXX */
}
static char *add_str(char *p, const char *to_add)
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)
{
ssize_t sz;
static unsigned custom(struct svdir *s, char c)
{
- int pid;
+ pid_t pid;
int w;
char a[10];
struct stat st;
- char *prog[2];
if (s->islog) return 0;
strcpy(a, "control/?");
- a[8] = c;
+ a[8] = c; /* replace '?' */
if (stat(a, &st) == 0) {
if (st.st_mode & S_IXUSR) {
- pid = fork();
+ pid = vfork();
if (pid == -1) {
- warn_cannot("fork for control/?");
+ warn_cannot("vfork for control/?");
return 0;
}
if (!pid) {
- if (haslog && dup2(logpipe[1], 1) == -1)
+ /* child */
+ if (haslog && dup2(logpipe.wr, 1) == -1)
warn_cannot("setup stdout for control/?");
- prog[0] = a;
- prog[1] = NULL;
- execve(a, prog, environ);
+ execl(a, a, (char *) NULL);
fatal_cannot("run control/?");
}
- while (wait_pid(&w, pid) == -1) {
- if (errno == EINTR) continue;
+ /* parent */
+ if (safe_waitpid(pid, &w, 0) == -1) {
warn_cannot("wait for child control/?");
return 0;
}
static void startservice(struct svdir *s)
{
int p;
- char *run[2];
+ const char *run;
if (s->state == S_FINISH)
- run[0] = (char*)"./finish";
+ run = "./finish";
else {
- run[0] = (char*)"./run";
+ run = "./run";
custom(s, 'u');
}
- run[1] = NULL;
if (s->pid != 0)
stopservice(s); /* should never happen */
- while ((p = fork()) == -1) {
- warn_cannot("fork, sleeping");
+ while ((p = vfork()) == -1) {
+ warn_cannot("vfork, sleeping");
sleep(5);
}
if (p == 0) {
/* child */
if (haslog) {
+ /* NB: bug alert! right order is close, then dup2 */
if (s->islog) {
- xdup2(logpipe[0], 0);
- close(logpipe[1]);
xchdir("./log");
+ close(logpipe.wr);
+ xdup2(logpipe.rd, 0);
} else {
- xdup2(logpipe[1], 1);
- close(logpipe[0]);
+ close(logpipe.rd);
+ xdup2(logpipe.wr, 1);
}
}
- signal(SIGCHLD, SIG_DFL);
- signal(SIGTERM, SIG_DFL);
+ /* Non-ignored signals revert to SIG_DFL on exec anyway */
+ /*bb_signals(0
+ + (1 << SIGCHLD)
+ + (1 << SIGTERM)
+ , SIG_DFL);*/
sig_unblock(SIGCHLD);
sig_unblock(SIGTERM);
- execvp(*run, run);
- fatal2_cannot(s->islog ? "start log/" : "start ", *run);
+ execl(run, run, (char *) NULL);
+ fatal2_cannot(s->islog ? "start log/" : "start ", run);
}
+ /* parent */
if (s->state != S_FINISH) {
gettimeofday_ns(&s->start);
s->state = S_RUN;
case 'c': /* sig cont */
if (s->pid && !custom(s, c))
kill(s->pid, SIGCONT);
- if (s->ctrl & C_PAUSE)
- s->ctrl &= ~C_PAUSE;
+ s->ctrl &= ~C_PAUSE;
update_status(s);
break;
case 'o': /* once */
return 1;
}
-int runsv_main(int argc, char **argv);
-int runsv_main(int argc, char **argv)
+int runsv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int runsv_main(int argc UNUSED_PARAM, char **argv)
{
struct stat s;
int fd;
int r;
char buf[256];
+ INIT_G();
+
if (!argv[1] || argv[2])
bb_show_usage();
dir = argv[1];
- xpipe(selfpipe);
- coe(selfpipe[0]);
- coe(selfpipe[1]);
- ndelay_on(selfpipe[0]);
- ndelay_on(selfpipe[1]);
+ xpiped_pair(selfpipe);
+ close_on_exec_on(selfpipe.rd);
+ close_on_exec_on(selfpipe.wr);
+ ndelay_on(selfpipe.rd);
+ ndelay_on(selfpipe.wr);
sig_block(SIGCHLD);
- sig_catch(SIGCHLD, s_child);
+ bb_signals_recursive_norestart(1 << SIGCHLD, s_child);
sig_block(SIGTERM);
- sig_catch(SIGTERM, s_term);
+ bb_signals_recursive_norestart(1 << SIGTERM, s_term);
xchdir(dir);
/* bss: svd[0].pid = 0; */
gettimeofday_ns(&svd[1].start);
if (stat("log/down", &s) != -1)
svd[1].want = W_DOWN;
- xpipe(logpipe);
- coe(logpipe[0]);
- coe(logpipe[1]);
+ xpiped_pair(logpipe);
+ close_on_exec_on(logpipe.rd);
+ close_on_exec_on(logpipe.wr);
}
}
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);
+ close_on_exec_on(svd[0].fdlock);
if (haslog) {
if (mkdir("log/supervise", 0700) == -1) {
r = readlink("log/supervise", buf, 256);
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);
+ close_on_exec_on(svd[1].fdlock);
}
mkfifo("log/supervise/control"+4, 0600);
svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY);
- coe(svd[0].fdcontrol);
+ close_on_exec_on(svd[0].fdcontrol);
svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY);
- coe(svd[0].fdcontrolwrite);
+ close_on_exec_on(svd[0].fdcontrolwrite);
update_status(&svd[0]);
if (haslog) {
mkfifo("log/supervise/control", 0600);
svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY);
- coe(svd[1].fdcontrol);
+ close_on_exec_on(svd[1].fdcontrol);
svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY);
- coe(svd[1].fdcontrolwrite);
+ close_on_exec_on(svd[1].fdcontrolwrite);
update_status(&svd[1]);
}
mkfifo("log/supervise/ok"+4, 0600);
fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY);
- coe(fd);
+ close_on_exec_on(fd);
if (haslog) {
mkfifo("log/supervise/ok", 0600);
fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY);
- coe(fd);
+ close_on_exec_on(fd);
}
for (;;) {
struct pollfd x[3];
if (svd[0].want == W_UP || svd[0].state == S_FINISH)
startservice(&svd[0]);
- x[0].fd = selfpipe[0];
+ x[0].fd = selfpipe.rd;
x[0].events = POLLIN;
x[1].fd = svd[0].fdcontrol;
x[1].events = POLLIN;
sig_block(SIGTERM);
sig_block(SIGCHLD);
- while (read(selfpipe[0], &ch, 1) == 1)
+ while (read(selfpipe.rd, &ch, 1) == 1)
continue;
for (;;) {
- int child;
+ pid_t child;
int wstat;
- child = wait_nohang(&wstat);
+ child = wait_any_nohang(&wstat);
if (!child)
break;
if ((child == -1) && (errno != EINTR))
sleep(1);
}
}
- }
+ } /* for (;;) */
if (read(svd[0].fdcontrol, &ch, 1) == 1)
ctrl(&svd[0], ch);
if (haslog)
if (svd[0].want == W_EXIT && svd[0].state == S_DOWN) {
if (svd[1].pid == 0)
- _exit(0);
+ _exit(EXIT_SUCCESS);
if (svd[1].want != W_EXIT) {
svd[1].want = W_EXIT;
/* stopservice(&svd[1]); */
update_status(&svd[1]);
- close(logpipe[1]);
- close(logpipe[0]);
+ close(logpipe.wr);
+ close(logpipe.rd);
}
}
- }
+ } /* for (;;) */
/* not reached */
return 0;
}
projects / oweals / busybox.git / blobdiff