bf7da7bcfb
Existing code in there (get_tty(), etc.) is both severely racy *and* pointless: ioctls in question have Linux equivalents and there's no need to play silly buggers in irix_ioctl() - just need to replace arguments and, in case of TIOCGSID, deal with API differences - Linux one expects pid_t __user * while Irix one does unsigned long __user *. BFD... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
214 lines
4.4 KiB
C
214 lines
4.4 KiB
C
/*
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* irixioctl.c: A fucking mess...
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*
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* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/sockios.h>
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#include <linux/syscalls.h>
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#include <linux/tty.h>
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#include <linux/file.h>
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#include <linux/rcupdate.h>
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#include <asm/uaccess.h>
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#include <asm/ioctl.h>
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#include <asm/ioctls.h>
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#undef DEBUG_IOCTLS
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#undef DEBUG_MISSING_IOCTL
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struct irix_termios {
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tcflag_t c_iflag, c_oflag, c_cflag, c_lflag;
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cc_t c_cc[NCCS];
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};
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asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
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{
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struct tty_struct *tp, *rtp;
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mm_segment_t old_fs;
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int i, error = 0;
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#ifdef DEBUG_IOCTLS
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printk("[%s:%d] irix_ioctl(%d, ", current->comm, current->pid, fd);
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#endif
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switch(cmd) {
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case 0x00005401:
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#ifdef DEBUG_IOCTLS
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printk("TCGETA, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TCGETA, arg);
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break;
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case 0x0000540d: {
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struct termios kt;
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struct irix_termios __user *it =
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(struct irix_termios __user *) arg;
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#ifdef DEBUG_IOCTLS
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printk("TCGETS, %08lx) ", arg);
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#endif
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if (!access_ok(VERIFY_WRITE, it, sizeof(*it))) {
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error = -EFAULT;
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break;
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}
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old_fs = get_fs(); set_fs(get_ds());
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error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
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set_fs(old_fs);
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if (error)
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break;
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error = __put_user(kt.c_iflag, &it->c_iflag);
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error |= __put_user(kt.c_oflag, &it->c_oflag);
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error |= __put_user(kt.c_cflag, &it->c_cflag);
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error |= __put_user(kt.c_lflag, &it->c_lflag);
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for (i = 0; i < NCCS; i++)
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error |= __put_user(kt.c_cc[i], &it->c_cc[i]);
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break;
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}
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case 0x0000540e: {
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struct termios kt;
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struct irix_termios *it = (struct irix_termios *) arg;
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#ifdef DEBUG_IOCTLS
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printk("TCSETS, %08lx) ", arg);
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#endif
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if (!access_ok(VERIFY_READ, it, sizeof(*it))) {
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error = -EFAULT;
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break;
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}
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old_fs = get_fs(); set_fs(get_ds());
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error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
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set_fs(old_fs);
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if (error)
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break;
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error = __get_user(kt.c_iflag, &it->c_iflag);
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error |= __get_user(kt.c_oflag, &it->c_oflag);
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error |= __get_user(kt.c_cflag, &it->c_cflag);
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error |= __get_user(kt.c_lflag, &it->c_lflag);
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for (i = 0; i < NCCS; i++)
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error |= __get_user(kt.c_cc[i], &it->c_cc[i]);
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if (error)
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break;
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old_fs = get_fs(); set_fs(get_ds());
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error = sys_ioctl(fd, TCSETS, (unsigned long) &kt);
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set_fs(old_fs);
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break;
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}
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case 0x0000540f:
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#ifdef DEBUG_IOCTLS
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printk("TCSETSW, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TCSETSW, arg);
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break;
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case 0x00005471:
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#ifdef DEBUG_IOCTLS
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printk("TIOCNOTTY, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TIOCNOTTY, arg);
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break;
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case 0x00007416: {
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pid_t pid;
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#ifdef DEBUG_IOCTLS
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printk("TIOCGSID, %08lx) ", arg);
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#endif
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old_fs = get_fs(); set_fs(get_ds());
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error = sys_ioctl(fd, TIOCGSID, (unsigned long)&pid);
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set_fs(old_fs);
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if (!error)
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error = put_user(pid, (unsigned long __user *) arg);
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break;
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}
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case 0x746e:
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/* TIOCSTART, same effect as hitting ^Q */
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#ifdef DEBUG_IOCTLS
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printk("TIOCSTART, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TCXONC, TCOON);
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break;
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case 0x20006968:
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#ifdef DEBUG_IOCTLS
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printk("SIOCGETLABEL, %08lx) ", arg);
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#endif
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error = -ENOPKG;
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break;
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case 0x40047477:
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#ifdef DEBUG_IOCTLS
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printk("TIOCGPGRP, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TIOCGPGRP, arg);
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#ifdef DEBUG_IOCTLS
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printk("arg=%d ", *(int *)arg);
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#endif
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break;
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case 0x40087468:
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#ifdef DEBUG_IOCTLS
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printk("TIOCGWINSZ, %08lx) ", arg);
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#endif
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error = sys_ioctl(fd, TIOCGWINSZ, arg);
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break;
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case 0x8004667e:
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error = sys_ioctl(fd, FIONBIO, arg);
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break;
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case 0x80047476:
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error = sys_ioctl(fd, TIOCSPGRP, arg);
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break;
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case 0x8020690c:
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error = sys_ioctl(fd, SIOCSIFADDR, arg);
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break;
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case 0x80206910:
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error = sys_ioctl(fd, SIOCSIFFLAGS, arg);
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break;
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case 0xc0206911:
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error = sys_ioctl(fd, SIOCGIFFLAGS, arg);
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break;
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case 0xc020691b:
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error = sys_ioctl(fd, SIOCGIFMETRIC, arg);
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break;
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default: {
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#ifdef DEBUG_MISSING_IOCTL
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char *msg = "Unimplemented IOCTL cmd tell linux-mips@linux-mips.org\n";
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#ifdef DEBUG_IOCTLS
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printk("UNIMP_IOCTL, %08lx)\n", arg);
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#endif
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old_fs = get_fs(); set_fs(get_ds());
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sys_write(2, msg, strlen(msg));
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set_fs(old_fs);
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printk("[%s:%d] Does unimplemented IRIX ioctl cmd %08lx\n",
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current->comm, current->pid, cmd);
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do_exit(255);
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#else
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error = sys_ioctl(fd, cmd, arg);
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#endif
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}
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};
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#ifdef DEBUG_IOCTLS
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printk("error=%d\n", error);
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#endif
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return error;
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}
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