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/* uuterm, Copyright (C) 2006 Rich Felker; licensed under GNU GPL v2 only */
#define _XOPEN_SOURCE 500
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
void uutty_resize(int fd, int w, int h)
{
#ifdef TIOCSWINSZ
struct winsize ws = { };
ws.ws_col = w;
ws.ws_row = h;
ioctl(fd, TIOCSWINSZ, &ws);
#endif
}
/* #define posix_openpt(x) open("/dev/ptmx", x) */
int uutty_open(char **cmd, int w, int h)
{
int ptm, pts;
struct stat st;
if (!cmd || !cmd[0] || stat(cmd[0], &st) < 0
|| !S_ISCHR(st.st_mode)
|| (ptm = open(cmd[0], O_RDWR|O_NOCTTY)) < 0
|| (isatty(ptm) ? 0 : (close(ptm),1)) ) {
if ((ptm = posix_openpt(O_RDWR|O_NOCTTY)) < 0)
return -1;
if (grantpt(ptm) < 0 || unlockpt(ptm) < 0) {
close(ptm);
return -1;
}
switch(fork()) {
case -1:
close(ptm);
return -1;
case 0:
setsid();
pts = open(ptsname(ptm), O_RDWR);
close(ptm);
dup2(pts, 0);
dup2(pts, 1);
dup2(pts, 2);
if (pts > 2) close(pts);
// FIXME............................
if (cmd) execvp(cmd[0], cmd);
else {
char *s = getenv("SHELL");
if (!s) s = "/bin/sh";
execl(s, s, (char *)0);
}
_Exit(1);
}
uutty_resize(ptm, w, h);
}
fcntl(ptm, F_SETFL, fcntl(ptm, F_GETFL)|O_NONBLOCK);
return ptm;
}
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