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#include <fcntl.h>
#include <stdlib.h>
#include <sys/termios.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <stropts.h>
int forkpty (int *amaster, char *name, struct termios
*termp, struct winsize *winp)
{
int fdm, fds;
char *slavename;
pid_t pid;
fdm = open("/dev/ptmx", O_RDWR); /* open master */
grantpt(fdm); /* change permission of slave */
unlockpt(fdm); /* unlock slave */
slavename = ptsname(fdm); /* get name of slave */
if (name) strcpy(name, slavename);
*amaster = fdm;
if ((pid = fork()) < 0) {
return pid; /* error */
}
else if (pid != 0) { /* parent */
return pid;
}
else { /* child */
pid_t pgid;
/* create a new session */
pgid = setsid();
if (pgid == -1) {
perror("setsid failed");
return -1;
}
fds = open(slavename, O_RDWR); /* open slave */
ioctl(fds, I_PUSH, "ptem"); /* push ptem */
ioctl(fds, I_PUSH, "ldterm"); /* push ldterm */
dup2(fds, 0);
dup2(fds, 1);
dup2(fds, 2);
ioctl(fds, TIOCSPGRP, &pgid);
/* magic */
if (termp)
ioctl(fds, TCSETS, termp);
if (winp)
ioctl(fds, TIOCSWINSZ, winp);
return pid;
}
}
int daemon(int nochdir, int noclose)
{
int fd;
switch (fork()) {
case -1:
return (-1);
case 0:
break;
default:
exit(0);
}
if (setsid() == -1)
return (-1);
if (!nochdir)
chdir("/");
if (!noclose && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2)
close (fd);
}
return (0);
}
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