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#define _XOPEN_SOURCE 500 //ptsname
#define _XOPEN_SOURCE_EXTENDED
#include <stdio.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
int main(int argc,char *argv[]) {
char *pts;
char in;//I dunno.
int r;
int pid;
int eof1,eof2;
int master,slave;
master=open("/dev/ptmx",O_RDWR);
if(master == -1) return 1;
pts=ptsname(master);
// printf("%s\n",pts);
// system("ls -l /dev/pts/*");
grantpt(master);
unlockpt(master);
// system("ls -l /dev/pts/*");
if(pts == NULL) return 2;
slave=open(pts,O_RDWR);
if(slave == -1) {
perror("open");
return 3;
}
argv++;
fcntl(master,F_SETFL,O_NONBLOCK);
// fcntl(slave,F_SETFL,O_NONBLOCK);
fcntl(0,F_SETFL,O_NONBLOCK);
fcntl(1,F_SETFL,O_NONBLOCK);
fcntl(2,F_SETFL,O_NONBLOCK);
switch(pid=fork()) {
case -1:
return 4;//fork failed
case 0://child
setsid();
close(master);
dup2(slave,0);
dup2(slave,1);
dup2(slave,2);
execv(argv[0],argv);//execute arguments.
return 5;//exec failed
default:
break;
}
eof1=0;
eof2=0;
for(;!(eof1 || eof2);) {
if(waitpid(-1,0,WNOHANG) > 0) {
return 0;//fuck if I know.
//we got a dead child. let's bail.
}
switch(r=read(0,&in,1)) {
case 0: eof1=1;;//EOF
case -1: if(errno != EAGAIN) eof1=1; break;//EAGAIN probably.
default: write(master,&in,r);
}
switch(r=read(master,&in,1)) {
case 0: eof2=1;;//EOF
case -1: if(errno != EAGAIN) eof2=1; break;//EAGAIN probably
default: write(1,&in,r);
}
usleep(100);//kek
}
}
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