144 lines
2.5 KiB
C
144 lines
2.5 KiB
C
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// SPDX-License-Identifier: LGPL-3.0-or-later
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/**
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* \file sys/con_unix.c
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*
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* Implements Unix console Input/Output.
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*
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* \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
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* \author Lorenzo Cogotti
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*/
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#include "sys/con.h"
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#include "sys/fs.h"
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/select.h>
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#include <assert.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int STM_TOFILDES(void *streamp)
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{
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return (int) ((Sintptr) streamp);
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}
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static Sint64 Sys_OpConRead(void *streamp, void *buf, size_t nbytes)
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{
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return Sys_Fread(STM_TOFILDES(streamp), buf, nbytes);
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}
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static Sint64 Sys_OpConWrite(void *streamp, const void *buf, size_t nbytes)
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{
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return Sys_Fwrite(STM_TOFILDES(streamp), buf, nbytes);
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}
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static Judgement Sys_OpConFinish(void *streamp)
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{
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USED(streamp);
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return OK; // NOP
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}
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static const StmOps con_stmOps = {
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Sys_OpConRead,
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Sys_OpConWrite,
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NULL,
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NULL,
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Sys_OpConFinish,
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NULL
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};
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const StmOps *const Stm_ConOps = &con_stmOps;
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void Sys_Print(ConHn hn, const char *s)
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{
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(void) write(hn, s, strlen(s));
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}
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void Sys_VPrintf(ConHn hn, const char *fmt, va_list va)
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{
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va_list vc;
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int n1, n2;
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char *buf;
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va_copy(vc, va);
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n1 = vsnprintf(NULL, 0, fmt, vc);
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va_end(vc);
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if (n1 <= 0)
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return;
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buf = (char *) alloca(n1 + 1);
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n2 = vsnprintf(buf, n1 + 1, fmt, va);
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if (n2 <= 0)
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return;
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assert(n2 == n1);
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(void) write(hn, buf, n2);
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}
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void Sys_Printf(ConHn hn, const char *fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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Sys_VPrintf(hn, fmt, va);
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va_end(va);
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}
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size_t Sys_Read(ConHn hn, char *buf, size_t n)
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{
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ssize_t nr = read(hn, buf, n);
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if (nr < 0)
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nr = 0;
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return nr;
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}
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size_t Sys_NbRead(ConHn hn, char *buf, size_t n)
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{
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fd_set rfds;
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struct timeval tv;
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FD_ZERO(&rfds);
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FD_SET(hn, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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if (select(1 + hn, &rfds, NULL, NULL, &tv) != 1)
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return 0;
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ssize_t nr = read(hn, buf, n);
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if (nr < 0)
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nr = 0;
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return nr;
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}
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Boolean Sys_IsVt100Console(ConHn hn)
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{
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static const char *const knownTerms[] = {
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"xterm", "xterm-color", "xterm-256color",
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"screen", "screen-256color", "tmux",
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"tmux-256color", "rxvt-unicode", "rxvt-unicode-256color",
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"linux", "cygwin"
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};
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const char *term = getenv("TERM");
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if (!term)
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return FALSE;
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size_t i;
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for (i = 0; i < ARRAY_SIZE(knownTerms); i++) {
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if (strcmp(term, knownTerms[i]) == 0)
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break;
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}
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return i != ARRAY_SIZE(knownTerms) && isatty(hn);
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}
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