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#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <alloca.h>
#include "ninitfeatures.h"
#include "initreq.h"
#define IREQ sizeof(struct init_request)
static char read_buf[IREQ + 4];
struct init_request *req = (void *)read_buf;
static int infd,outfd,flag_fork;
#include "open_inout.h"
#include "uid.h"
void sighandler(int sig) { (void)sig; while (waitpid(-1,0,WNOHANG) > 0); }
static void do_it(char *A) {
int r=0;
if (flag_fork) { while ((r=fork()) == -1) nano_sleep(1,0); }
if (r==0) {
open_inout(INITROOT);
msg("Starting service: ",A+1);
write(infd, A, str_len(A));
read(outfd, req, IREQ);
close(infd); close(outfd);
if (flag_fork) _exit(0);
}
}
void print_env() {
char *x = req->i.data;
msg("request"," for INIT_CMD_SETENV");
while (*x) {
msg(x);
x += str_len(x);
x++;
}
}
int main(int argc, char **argv) {
struct pollfd pfd;
unsigned long ul[2] = {0,0};
int fd, timeout = -1;
char power[] = "spowerS";
errmsg_iam("ninit-sysvinit");
if (argc>1 && !str_diff(argv[1], "powerS")) {
char ch;
msg("trying to read and remove: ", INIT_POWERSTATUS);
fd=open(INIT_POWERSTATUS, O_RDONLY);
if (fd>=0) { read(fd,&ch,1); close(fd); }
unlink(INIT_POWERSTATUS);
if ('a' <= ch && ch <= 'z') ch -= 32;
switch (ch) {
case 'L': case 'O': break;
default: ch = 'F';
}
power[6] = ch;
do_it(power);
return 0;
}
fd = open(INIT_FIFO, O_RDWR | O_NONBLOCK);
if (fd < 0) {
SYS_mknod(INIT_FIFO,S_IFIFO|0600,0);
return -1;
}
fcntl(fd,F_SETFD,FD_CLOEXEC);
pfd.fd = fd;
pfd.events = POLLIN;
read_ulongs("sysvinit-timeout", ul, 2);
if (ul[0] > 0)timeout = 1000 * ul[0];
flag_fork = (ul[1] != 0);
// msg(" timeout: ",fu(ul[0]), ",fork-mode: ",flag_fork ? "YES" : "NO");
if (flag_fork) set_sa(SIGCHLD);
while (1) {
int flag_known = 0;
switch (poll(&pfd,1,timeout)) {
case -1:
if (errno == EINTR) sighandler(SIGCHLD); break;
return -1; /* poll failed */
case 1: {
int r = read(fd, req, IREQ);
if (r == (int)IREQ) {
#ifdef SYSVINIT_DUMP_INITREQ
if ((r=open("/tmp/__##initreq", O_WRONLY | O_APPEND)) >= 0)
{ write(r,req,IREQ); close(r); }
#endif
if (req->magic == INIT_MAGIC) {
char level[] = "slevelS";
char *A="";
switch (req->cmd) {
case INIT_CMD_SETENV:
print_env();
flag_known=1;
break;
case INIT_CMD_RUNLVL:
r = req->runlevel;
if ('a' <= r && r <= 'z') r -= 32;
level[6] = r;
A = level;
break;
case INIT_CMD_POWEROK:
A = power;
power[6] = 'O';
break;
case INIT_CMD_POWERFAIL:
A = power;
power[6] = 'F';
break;
case INIT_CMD_POWERFAILNOW:
A = power;
power[6] = 'L';
}
if (*A) { flag_known=1; do_it(A); }
} /* INIT_MAGIC */
} /* r == sizeof(...) */
if (flag_known==0) carp("unknown", " request");
}
break;
default: /* timeout */
return 0;
} /* poll */
}
}
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