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