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62 lines
1.2 KiB
62 lines
1.2 KiB
20 years ago
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/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdlib.h>
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#include <errno.h>
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#include "os.h"
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#include "user.h"
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#include "kern_util.h"
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struct grantpt_info {
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int fd;
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int res;
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int err;
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};
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static void grantpt_cb(void *arg)
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{
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struct grantpt_info *info = arg;
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info->res = grantpt(info->fd);
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info->err = errno;
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}
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int get_pty(void)
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{
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struct grantpt_info info;
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int fd;
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fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0);
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if(fd < 0){
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printk("get_pty : Couldn't open /dev/ptmx - err = %d\n", -fd);
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return(fd);
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}
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info.fd = fd;
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initial_thread_cb(grantpt_cb, &info);
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if(info.res < 0){
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printk("get_pty : Couldn't grant pty - errno = %d\n",
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-info.err);
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return(-1);
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}
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if(unlockpt(fd) < 0){
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printk("get_pty : Couldn't unlock pty - errno = %d\n", errno);
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return(-1);
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}
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return(fd);
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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