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Make it possible for a process to switch controlling terminals.

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Via the TIOCSCTTY and TIOCNOTTY ioctls.
This commit is contained in:
Andreas Kling 2019-01-15 08:49:24 +01:00
parent 10308c6434
commit 49b63281a0
6 changed files with 31 additions and 4 deletions
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14
Terminal/main.cpp
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@ -8,6 +8,7 @@
#include <Widgets/Font.h>
#include <Widgets/GraphicsBitmap.h>
#include <Widgets/Painter.h>
#include <sys/ioctl.h>
#include <gui.h>
#include "Terminal.h"
@ -20,9 +21,15 @@ static void make_shell(int ptm_fd)
perror("ptsname");
exit(1);
}
int rc = 0;
close(ptm_fd);
int pts_fd = open(tty_name, O_RDWR);
dbgprintf("*** In child (%d), opening slave pty %s, pts_fd=%d\n", getpid(), tty_name, pts_fd);
rc = ioctl(0, TIOCNOTTY);
if (rc < 0) {
perror("ioctl(TIOCNOTTY)");
exit(1);
}
close(0);
close(1);
close(2);
@ -30,7 +37,12 @@ static void make_shell(int ptm_fd)
dup2(pts_fd, 1);
dup2(pts_fd, 2);
close(pts_fd);
int rc = execve("/bin/sh", nullptr, nullptr);
rc = ioctl(0, TIOCSCTTY);
if (rc < 0) {
perror("ioctl(TIOCSCTTY)");
exit(1);
}
rc = execve("/bin/sh", nullptr, nullptr);
if (rc < 0) {
perror("execve");
exit(1);