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- Implement openpty()
- Add `--assimilate` flag to APE bootloader
- Restore Linux vDSO clock_gettime() support
- Use `$(APE_NO_MODIFY_SELF)` on more programs
This commit is contained in:
Justine Tunney 2022-05-24 10:19:39 -07:00
parent cef50f2a6b
commit d44ff6ce1f
33 changed files with 600 additions and 251 deletions
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49
libc/calls/openpty.c
View file

@ -17,33 +17,44 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/ioctl.h"
#include "libc/calls/termios.h"
#include "libc/fmt/itoa.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/pty.h"
#include "libc/sysv/consts/termios.h"
#include "libc/sysv/errfuns.h"
/**
* Opens new pseudo teletypewriter.
*
* @param ilduce receives controlling tty rw fd on success
* @param aworker receives subordinate tty rw fd on success
* @param termp may be passed to tune a century of legacy behaviors
* @param winp may be passed to set terminal display dimensions
* @param mfd receives controlling tty rw fd on success
* @param sfd receives subordinate tty rw fd on success
* @param tio may be passed to tune a century of legacy behaviors
* @param wsz may be passed to set terminal display dimensions
* @params flags is usually O_RDWR|O_NOCTTY
* @return file descriptor, or -1 w/ errno
* @return 0 on success, or -1 w/ errno
*/
int openpty(int *ilduce, int *aworker, char *name, const struct termios *termp,
const struct winsize *winp) {
return enosys();
/* TODO(jart) */
/* int fd, flags; */
/* flags = O_RDWR | O_NOCTTY; */
/* if ((fd = posix_openpt(flags)) != -1) { */
/* if (ioctl(m, TIOCSPTLCK, &n) || ioctl(m, TIOCGPTN, &n)) { */
/* } else { */
/* close(fd); */
/* } */
/* } else { */
/* return -1; */
/* } */
int openpty(int *mfd, int *sfd, char *name, const struct termios *tio,
const struct winsize *wsz) {
int m, s, n;
char buf[20];
if ((m = open("/dev/ptmx", O_RDWR | O_NOCTTY)) != -1) {
n = 0;
if (!ioctl(m, TIOCSPTLCK, &n) || !ioctl(m, TIOCGPTN, &n)) {
if (!name) name = buf;
name[0] = '/', name[1] = 'd', name[2] = 'e', name[3] = 'v';
name[4] = '/', name[5] = 'p', name[6] = 't', name[7] = 's';
name[8] = '/', FormatInt32(name + 9, n);
if ((s = open(name, O_RDWR | O_NOCTTY)) != -1) {
if (tio) ioctl(s, TCSETS, tio);
if (wsz) ioctl(s, TIOCSWINSZ, wsz);
*mfd = m;
*sfd = s;
return 0;
}
}
close(m);
}
return -1;
}