mirror of
https://github.com/jart/cosmopolitan.git
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3e4fd4b0ad
This change also pays off some of the remaining technical debt with stdio, file descriptors, and memory managemnt polyfills.
87 lines
3.6 KiB
C
87 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/dce.h"
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#include "libc/fmt/fmt.h"
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#include "libc/log/log.h"
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#include "libc/nt/console.h"
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#include "libc/nt/enum/consolemodeflags.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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static textwindows noinline int ttyname$nt(int fd, char *buf, size_t size) {
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uint32_t mode;
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if (GetConsoleMode(g_fds.p[fd].handle, &mode)) {
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if (mode & kNtEnableVirtualTerminalInput) {
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strncpy(buf, "CONIN$", size);
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return 0;
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} else {
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strncpy(buf, "CONOUT$", size);
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return 0;
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}
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} else {
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return enotty();
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}
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}
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static int ttyname$freebsd(int fd, char *buf, size_t size) {
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const unsigned FIODGNAME = 2148558456;
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struct fiodgname_arg {
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int len;
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void *buf;
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} fg;
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fg.buf = buf;
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fg.len = size;
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if (ioctl$sysv(fd, FIODGNAME, &fg) != -1) return 0;
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return enotty();
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}
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static int ttyname$linux(int fd, char *buf, size_t size) {
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struct stat st1, st2;
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if (!isatty(fd)) return errno;
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char name[PATH_MAX];
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snprintf(name, sizeof(name), "/proc/self/fd/%d", fd);
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ssize_t got;
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got = readlink(name, buf, size);
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if (got == -1) return errno;
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if ((size_t)got >= size) return erange();
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buf[got] = 0;
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if (stat(buf, &st1) || fstat(fd, &st2)) return errno;
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if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) return enodev();
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return 0;
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}
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int ttyname_r(int fd, char *buf, size_t size) {
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if (IsLinux()) {
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return ttyname$linux(fd, buf, size);
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} else if (IsFreebsd()) {
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return ttyname$freebsd(fd, buf, size);
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} else if (IsWindows()) {
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if (__isfdkind(fd, kFdFile)) {
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return ttyname$nt(fd, buf, size);
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} else {
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return ebadf();
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}
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} else {
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return enosys();
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}
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}
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