mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-11 13:35:00 +00:00
441 lines
8.9 KiB
C
441 lines
8.9 KiB
C
/* 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 const char *acts;
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static char **service;
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static unsigned rc;
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static struct taia tstart, tnow;
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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(const char *m1) ATTRIBUTE_NORETURN;
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static void fatal_cannot(const 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(const char *p, const 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 WARN "warning: "
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#define OK "ok: "
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static void fail(const char *m1) {
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++rc;
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out("fail: ", m1);
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}
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static void failx(const char *m1) {
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errno = 0;
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fail(m1);
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}
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static void warn_cannot(const char *m1) {
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++rc;
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out("warning: cannot ", m1);
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}
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static void warnx_cannot(const char *m1) {
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errno = 0;
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warn_cannot(m1);
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}
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static void ok(const char *m1) {
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errno = 0;
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out(OK, m1);
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}
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static int svstatus_get(void)
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{
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int fd, r;
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fd = open_write("supervise/ok");
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if (fd == -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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fd = open_read("supervise/status");
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if (fd == -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(const char *m)
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{
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long diff;
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int pid;
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int normallyup = 0;
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struct stat s;
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struct tai tstatus;
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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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} else {
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printf("down: %s: ", m);
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}
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diff = tnow.sec.x - tstatus.x;
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printf("%lds", (diff < 0 ? 0L : diff));
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if (pid) {
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if (!normallyup) printf(", normally down");
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} else {
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if (normallyup) printf(", normally up");
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}
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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(const char *unused)
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{
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int r;
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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] = (char*)"./check";
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prog[1] = NULL;
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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(const char *a)
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{
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int r;
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unsigned pid;
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struct tai tstatus;
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r = svstatus_get();
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if (r == -1)
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return -1;
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if (r == 0) {
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if (*a == 'x')
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return 1;
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return -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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switch (*a) {
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case 'x':
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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':
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if (pid) return 0;
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break;
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case 'c':
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if (pid && !checkscript()) return 0;
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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);
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svstatus_print(*service);
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puts(""); /* will also flush the output */
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return 1;
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}
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static int control(const char *a)
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{
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int fd, r;
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if (svstatus_get() <= 0) return -1;
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if (svstatus[17] == *a) return 0;
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fd = open_write("supervise/control");
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if (fd == -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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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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char *action;
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const char *varservice = "/var/service/";
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unsigned services;
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char **servicex;
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unsigned long waitsec = 7;
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smallint kll = 0;
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smallint verbose = 0;
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int (*act)(const char*);
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int (*cbk)(const char*);
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int curdir;
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xfunc_error_retval = 100;
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x = getenv("SVDIR");
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if (x) varservice = x;
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x = getenv("SVWAIT");
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if (x) waitsec = xatoul(x);
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opt = getopt32(argc, argv, "w:v", &x);
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if (opt & 1) waitsec = xatoul(x); // -w
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if (opt & 2) verbose = 1; // -v
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argc -= optind;
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argv += optind;
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action = *argv++;
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if (!action || !*argv) usage();
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service = argv;
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services = argc - 1;
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taia_now(&tnow);
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tstart = tnow;
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curdir = open_read(".");
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if (curdir == -1)
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fatal_cannot("open current directory");
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act = &control;
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acts = "s";
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cbk = ✓
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switch (*action) {
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case 'x':
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case 'e':
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acts = "x";
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if (!verbose) cbk = NULL;
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break;
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case 'X':
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case 'E':
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acts = "x";
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kll = 1;
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break;
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case 'D':
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acts = "d";
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kll = 1;
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break;
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case 'T':
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acts = "tc";
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kll = 1;
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break;
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case 'c':
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if (!str_diff(action, "check")) {
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act = NULL;
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acts = "c";
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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';
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acts = action;
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if (!verbose) cbk = NULL;
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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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break;
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}
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if (!str_diff(action, "start")) {
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acts = "u";
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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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break;
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}
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/* "status" */
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act = &status;
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cbk = NULL;
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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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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";
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kll = 1;
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break;
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}
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if (!str_diff(action, "force-restart")) {
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acts = "tcu";
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kll = 1;
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break;
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}
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if (!str_diff(action, "force-shutdown")) {
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acts = "x";
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kll = 1;
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break;
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}
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if (!str_diff(action, "force-stop")) {
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acts = "d";
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kll = 1;
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break;
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}
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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)
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goto chdir_failed_0;
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}
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if (chdir(*service) == -1) {
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chdir_failed_0:
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fail("cannot change to service directory");
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goto nullify_service_0;
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}
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if (act && (act(acts) == -1)) {
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nullify_service_0:
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*service = NULL;
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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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service++;
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}
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if (cbk) while (1) {
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//struct taia tdiff;
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long diff;
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//taia_sub(&tdiff, &tnow, &tstart);
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diff = tnow.sec.x - tstart.sec.x;
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service = servicex;
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want_exit = 1;
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for (i = 0; i < services; ++i, ++service) {
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if (!*service)
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continue;
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if ((**service != '/') && (**service != '.')) {
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if (chdir(varservice) == -1)
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goto chdir_failed;
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}
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if (chdir(*service) == -1) {
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chdir_failed:
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fail("cannot change to service directory");
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goto nullify_service;
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}
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if (cbk(acts) != 0)
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goto nullify_service;
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want_exit = 0;
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if (diff >= waitsec) {
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printf(kll ? "kill: " : "timeout: ");
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if (svstatus_get() > 0) {
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svstatus_print(*service);
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++rc;
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}
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puts(""); /* will also flush the output */
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if (kll)
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control("k");
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nullify_service:
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*service = NULL;
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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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