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#define I_IOCTL
#define I_SOCKET
#define I_ERRNO
#define I_STRING
#define I_SYS
#include "includes.h"
#include "debug.h"
#include <string.h>
#include <signal.h>
#include <sys/stat.h>
#include <pwd.h>
#ifdef USE_TIOCNOTTY
#include <sys/ioctl.h>
#endif
#ifdef SYSV
#include <stropts.h>
#if defined(SVR4) || defined(SCO)
int grantpt(int);
char *ptsname(int);
int unlockpt(int);
#endif
#endif
int pty_pid;
/* Moved these strings here for compilers which can't handle
aggregate auto initialization. Makes open_pty() non-reentrant.
HSW 93-01-29
*/
#ifdef __hpux
static char masterline[]="/dev/ptym/ptyXY";
static char slaveline[]="/dev/pty/ttyXY";
static char *first ="pqrstuv";
#define NBANK 15
#else /* not hpux, and not sgi. */
static char masterline[]="/dev/ptyXY";
static char *first ="pqrstuvwxyz";
static char slaveline[]="/dev/ttyXY";
#define NBANK 16
#endif
int open_pty(char *prog)
{
int masterfd = -1,
slavefd,
i,
pid;
int pip[2];
#if !defined(sgi) && !defined(SYSV) && !defined(_AIX)
#define SFIRST (sizeof (slaveline) - 3)
#define SSECOND (sizeof (slaveline) - 2)
/* Ok. Stuff for not sgi. */
#define MFIRST (sizeof (masterline) - 3)
#define MSECOND (sizeof (masterline) - 2)
char *ptr = first;
int c;
#else /* sgi || SYSV */
#ifdef SYSV
/* Stuff for SYSV */
void (*savesig)(int);
char *slaveline;
#else /* SYSV */
#ifdef _AIX
/* AIX Stuff */
char *slaveline;
#else /* AIX */
/* And then finally, sgi stuff. */
char *linetmp;
char slaveline[20];
#endif /* AIX */
#endif /* SYSV */
#endif /* sgi || SYSV */
#if !defined(sgi) && !defined(SYSV) && !defined(_AIX)
/* get a pseudo tty */
ptr = first;
for (c = *ptr; (c = *ptr); ++ptr) {
struct stat statbuff;
masterline[MFIRST] = c;
masterline[MSECOND] = '0';
if (stat (masterline, &statbuff) < 0)
continue; /* no pty's on this bank availiable */
i = 0;
again:
for (; i<NBANK; ++i) {
masterline[MSECOND] = "0123456789abcdef"[i];
if ((masterfd = open (masterline, O_RDWR, 0)) > 0)
break;
}
if (i != NBANK) {
/* Ok. now check to make sure we can */
/* open the slave as well. */
slaveline[SFIRST] = masterline[MFIRST];
slaveline[SSECOND] = masterline[MSECOND];
if ((slavefd = open (slaveline, O_RDWR, 0)) < 0) {
close(masterfd);
++i;
goto again;
}
break;
}
}
if (!c)
return -1;
DEBUG_FP(stderr, "%s: opened pty master=%s(%u) slave=%s(%u)\n",
term_server, masterline, masterfd, slaveline, slavefd);
#ifdef SUIDROOT
if (fchmod (slavefd, 0622))
return -2;
#endif
close(slavefd);
#else /* sgi || SYSV || _AIX */
#ifdef SYSV
if ((masterfd = open("/dev/ptmx", O_RDWR, 0)) < 0)
return -1;
savesig = signal(SIGCHLD, SIG_DFL);
if (grantpt(masterfd) < 0) {
close(masterfd);
sigset(SIGCHLD, savesig);
return -1;
}
sigset(SIGCHLD, savesig);
if (unlockpt(masterfd) < 0) {
close(masterfd);
return -1;
}
slaveline = ptsname(masterfd);
if (slaveline == NULL) {
close(masterfd);
return -1;
}
#else /* SYSV */
#ifdef _AIX
if ( (masterfd=open("/dev/ptc",O_RDWR,0600)) < 0 )
return -1; /* No pty's available */
slaveline = ttyname(masterfd);
#else /* AIX */
linetmp = _getpty(&masterfd, O_RDWR, 0600, 0);
if (linetmp == NULL)
return -1; /* no pty's available */
strcpy(slaveline, linetmp);
/* Don't check slave - have to assume it's going to work */
#endif /* AIX */
#endif /* SYSV */
#endif /* sgi */
fflush (stdout);
if (pipe(pip) <0)
return -3; /* unable to pipe */
if ((pid = fork ()) < 0)
return -3; /* unable to fork */
if (pid == 0) { /* child. */
/* char ** a, *b[2] = {0, }; Ultrix MIPS compiler chokes */
char ** a, *b[2];
#ifdef LOGIN_SHELL
char argv0[1024];
char * progname;
int loginshell=0;
#endif /*LOGIN_SHELL*/
b[0]=b[1]=NULL;
close(0);
close(1);
close(2);
lose_ctty();
/* make it control tty */
if ((slavefd = open (slaveline, O_RDWR, 0)) < 0) {
exit(1);
}
#ifdef USE_VHANGUP
signal (SIGHUP, SIG_IGN);
vhangup ();
signal (SIGHUP, SIG_DFL);
if ((slavefd = open (slaveline, O_RDWR, 0)) < 0) {
exit(1);
}
#endif
#ifdef SYSV
if (ioctl(slavefd, I_PUSH, "ptem") < 0) {
exit(1);
}
if (ioctl(slavefd, I_PUSH, "ldterm") < 0) {
exit(1);
}
#ifdef SVR4
if (ioctl(slavefd, I_PUSH, "ttcompat") < 0) {
exit(1);
}
#endif /* SVR4 */
#endif /* SYSV */
/*
** do a term setup here.
*/
dup2 (slavefd, 0);
dup2 (slavefd, 1);
dup2 (slavefd, 2);
for (slavefd = 3; slavefd < 64; ++slavefd)
{
if (slavefd != pip[1]) close(slavefd);
}
#if !(defined(SVR4)) && !(defined(__hpux))
#ifdef USE_TERMIOS
terminal_new(0);
#else
terminal_restore(0);
#endif
#endif
/* find out what shell to run. */
/* note: technically we should free a, but as we are
* in the child who will either exec or exit, we can
* neglect this. croutons.
*/
a = rebuild_arg(prog);
if ( !a ) a = b;
#ifdef LOGIN_SHELL
if ( !a[0] ) { a[0] = getenv("SHELL"); loginshell=1; }
if ( !a[0] ) { a[0] = "/bin/sh"; loginshell=1; }
progname = a[0];
if (loginshell) {
sprintf(argv0, "-%s", strrchr(a[0], '/') ?
(char*)(strrchr(a[0], '/') + 1 ) : (char*) a[0]);
a[0] = argv0;
}
#else /*LOGIN_SHELL*/
if ( !a[0] ) a[0] = getenv("SHELL");
if ( !a[0] ) a[0] = "/bin/sh";
#endif /*LOGIN_SHELL*/
/* these printfs are dangerous on NeXT,
if the strings are too long, the printfs block! */
printf ("Remote: term %s\r\n", VERSION);
printf ("tty %s. Exec %s\r\n", slaveline, a[0]);
/* pipe will close upon successful exec */
if (fcntl (pip[1], F_SETFD, 1) == -1)
{
/* close it now since fcntl failed */
close (pip[1]);
}
#ifdef LOGIN_SHELL
execvp(progname, a);
#else
execvp(a[0], a);
#endif
/* write something so parent notes exec failure */
write(pip[1],"",1);
close(pip[1]);
/* for what it's worth */
printf ("Exec failed %s\r\n", a[0]);
exit(1);
}
/* parent */
close(pip[1]);
/* Wait for exec, read blocks until pipe is closed */
if (read(pip[0], (char *) &i, 1) == 0)
DEBUG_FP (stderr, "%s: exec apparently succeeded\n", term_server);
else
DEBUG_FP (stderr, "%s: exec apparently failed\n", term_server);
close(pip[0]);
set_nonblock(masterfd);
/* ioctl(masterfd, TIOCPKY, &one); BSD pty packet mode. */
pty_pid = pid;
return masterfd;
}
static char *argv[4] = {"/bin/sh", "-c", NULL, NULL};
/* non-pty exec */
/* usage is more like rsh, shell can handle compound command */
int open_socket(char *prog)
{
int i;
int soc[2];
int pid;
int pip[2];
#ifdef NO_UNIX_DOMAIN
if (s_pipe(soc) < 0)
return -4; /* no stream pipe */
#else
if (socketpair(AF_UNIX, SOCK_STREAM, 0, soc) < 0)
return -4; /* no socket */
#endif
/* soc[0] is term's end */
set_nonblock(soc[0]);
pipe(pip);
if ((pid = fork ()) < 0)
return -3; /* unable to fork */
if (pid == 0) /* child. */
{
close (0);
close (1);
close (2);
lose_ctty();
/* soc[1] is child's end */
dup2 (soc[1], 0);
dup2 (soc[1], 1);
dup2 (soc[1], 2);
for (i = 3; i < 64;++i)
if (i != pip[1])
close(i);
setbuf(stdout, NULL);
/* unpack args */
for (i=0; prog[i] != '\0'; ++i)
if (prog[i] == '\377')
prog[i] = ' ';
argv[2] = prog;
/* pipe will close upon successful exec */
if (fcntl (pip[1], F_SETFD, 1) == -1)
close (pip[1]);
execvp(argv[0], argv);
write(pip[1],"",1);
close(pip[1]);
printf ("Exec failed %s\r\n", argv[0]);
exit(1);
}
/* parent */
close(pip[1]);
close(soc[1]);
/* Wait for exec, read blocks until pipe is closed */
if (read(pip[0], (char *) &i, 1) == 0)
DEBUG_FP (stderr, "%s: exec apparently succeeded\n", term_server);
else
DEBUG_FP (stderr, "%s: exec apparently failed\n", term_server);
close(pip[0]);
pty_pid = pid;
return soc[0];
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.