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