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kernel: usercopy functions

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Matheus
2024-06-09 19:31:26 -03:00
parent 429f56aced
commit 50b4b45d00
53 changed files with 712 additions and 260 deletions
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kernel-src/io/tty.c
+31 -25
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@@ -3,6 +3,7 @@
#include <logging.h>
#include <kernel/alloc.h>
#include <kernel/jobctl.h>
#include <kernel/usercopy.h>
#define TTY_MAX_COUNT 4096
#define CONTROLLING_TTY_MINOR TTY_MAX_COUNT
@@ -300,14 +301,13 @@ static int poll(int minor, polldata_t *data, int events) {
int tty_ioctl(tty_t *tty, unsigned long req, void *arg, int *result) {
switch (req) {
case TIOCGWINSZ: {
winsize_t *w = arg;
*w = tty->winsize;
break;
}
case TIOCGWINSZ:
return USERCOPY_POSSIBLY_TO_USER(arg, &tty->winsize, sizeof(winsize_t));
case TIOCSWINSZ: {
winsize_t *w = arg;
tty->winsize = *w;
int e = USERCOPY_POSSIBLY_FROM_USER(&tty->winsize, arg, sizeof(winsize_t));
if (e)
return e;
proc_t *foreground = getforeground(tty);
if (foreground) {
jobctl_signal(foreground, SIGWINCH);
@@ -315,18 +315,22 @@ int tty_ioctl(tty_t *tty, unsigned long req, void *arg, int *result) {
}
break;
}
case TCGETS: {
*(termios_t *)arg = tty->termios;
break;
}
case TCSETS: {
tty->termios = *(termios_t *)arg;
break;
}
case TCGETS:
return USERCOPY_POSSIBLY_TO_USER(arg, &tty->termios, sizeof(termios_t));
case TCSETS:
return USERCOPY_POSSIBLY_FROM_USER(&tty->termios, arg, sizeof(termios_t));
case TIOCSCTTY: {
int *steal = arg;
if (steal && *steal == 1)
printf("tty: stealing not supported\n");
if (arg) {
int steal;
int e = USERCOPY_POSSIBLY_FROM_USER(&steal, arg, sizeof(int));
if (e)
return e;
if (steal == 1) {
printf("tty: stealing not supported\n");
return EINVAL;
}
}
// set as controlling tty
jobctl_setctty(_cpu()->thread->proc, tty);
break;
@@ -336,14 +340,17 @@ int tty_ioctl(tty_t *tty, unsigned long req, void *arg, int *result) {
if (foreground == NULL)
return ENOTTY;
int *pgrp = arg;
*pgrp = foreground->pid;
int pgrp = foreground->pid;
PROC_RELEASE(foreground);
break;
return USERCOPY_POSSIBLY_TO_USER(arg, &pgrp, sizeof(int));
}
case TIOCSPGRP: {
int *pgrpptr = arg;
int pgrp = *pgrpptr;
int pgrp;
int e = USERCOPY_POSSIBLY_FROM_USER(&pgrp, arg, sizeof(int));
if (e)
return e;
proc_t *proc = sched_getprocfrompid(pgrp);
if (proc == NULL)
return ESRCH;
@@ -354,8 +361,7 @@ int tty_ioctl(tty_t *tty, unsigned long req, void *arg, int *result) {
}
case TTY_IOCTL_NAME: {
size_t len = min(strlen(tty->name) + 1, TTY_NAME_MAX);
memcpy(arg, tty->name, len);
break;
return USERCOPY_POSSIBLY_TO_USER(arg, tty->name, len);
}
default:
return ENOTTY;