--- lbbs/src/io.c 2005/03/21 05:43:43 1.7 +++ lbbs/src/io.c 2025/05/13 02:19:15 1.30 @@ -1,200 +1,420 @@ /*************************************************************************** - io.c - description - ------------------- - begin : Mon Oct 18 2004 - copyright : (C) 2004 by Leaflet - email : leaflet@leafok.com + io.c - description + ------------------- + Copyright : (C) 2004-2025 by Leaflet + Email : leaflet@leafok.com ***************************************************************************/ /*************************************************************************** * * * 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; either version 2 of the License, or * + * the Free Software Foundation; either version 3 of the License, or * * (at your option) any later version. * * * ***************************************************************************/ #include "io.h" +#include "log.h" #include "common.h" +#include #include #include +#include +#include +#include +#include +#include #include +#include -int -outc (char c) +static char stdout_buf[BUFSIZ]; +static int stdout_buf_len = 0; +static int stdout_buf_offset = 0; + +int prints(const char *format, ...) { - int retval; + char buf[BUFSIZ]; + va_list args; + int ret; + + va_start(args, format); + ret = vsnprintf(buf, sizeof(buf), format, args); + va_end(args); - retval = fprintf (stdout, "%c", c); + if (ret > 0) + { + if (stdout_buf_len + ret > BUFSIZ) + { + iflush(); + } + + if (stdout_buf_len + ret <= BUFSIZ) + { + memcpy(stdout_buf + stdout_buf_len, buf, (size_t)ret); + stdout_buf_len += ret; + } + else + { + errno = EAGAIN; + ret = (BUFSIZ - stdout_buf_len - ret); + } + } - return retval; + return ret; } -int -prints (const char *format, ...) +int outc(char c) { - va_list args; - int retval; + int ret; - va_start (args, format); - retval = vfprintf (stdout, format, args); - va_end (args); + if (stdout_buf_len + 1 > BUFSIZ) + { + iflush(); + } - return retval; + if (stdout_buf_len + 1 <= BUFSIZ) + { + stdout_buf[stdout_buf_len] = c; + stdout_buf_len++; + } + else + { + errno = EAGAIN; + ret = -1; + } + + return ret; } -int -iflush () +int iflush() { - int retval; + int flags; + struct epoll_event ev, events[MAX_EVENTS]; + int nfds, epollfd; + int retry; + int ret = 0; + + epollfd = epoll_create1(0); + if (epollfd < 0) + { + log_error("epoll_create1() error (%d)\n", errno); + return -1; + } - retval = fflush (stdout); + ev.events = EPOLLOUT; + ev.data.fd = STDOUT_FILENO; + if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDOUT_FILENO, &ev) == -1) + { + log_error("epoll_ctl(STDOUT_FILENO) error (%d)\n", errno); + return -1; + } + + // Set STDOUT as non-blocking + flags = fcntl(STDOUT_FILENO, F_GETFL, 0); + fcntl(STDOUT_FILENO, F_SETFL, flags | O_NONBLOCK); + + // Retry wait / flush for at most 3 times + retry = 3; + while (retry > 0 && !SYS_server_exit) + { + retry--; + + nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second + + if (nfds < 0) + { + if (errno != EINTR) + { + log_error("epoll_wait() error (%d)\n", errno); + break; + } + continue; + } + else if (nfds == 0) // timeout + { + continue; + } - return retval; + for (int i = 0; i < nfds; i++) + { + if (events[i].data.fd == STDOUT_FILENO) + { + while (stdout_buf_offset < stdout_buf_len && !SYS_server_exit) // write until complete or error + { + ret = (int)write(STDOUT_FILENO, stdout_buf + stdout_buf_offset, (size_t)(stdout_buf_len - stdout_buf_offset)); + if (ret < 0) + { + if (errno == EAGAIN || errno == EWOULDBLOCK) + { + break; + } + else if (errno == EINTR) + { + continue; + } + else + { + log_error("write(STDOUT) error (%d)\n", errno); + retry = 0; + break; + } + } + else if (ret == 0) // broken pipe + { + retry = 0; + break; + } + else + { + stdout_buf_offset += ret; + if (stdout_buf_offset >= stdout_buf_len) // flush buffer completely + { + ret = 0; + stdout_buf_offset = 0; + stdout_buf_len = 0; + retry = 0; + break; + } + continue; + } + } + } + } + } + + // Restore STDOUT flags + fcntl(STDOUT_FILENO, F_SETFL, flags); + + return ret; } -int -igetch () +int igetch(int clear_buf) { - static char buf[256]; - unsigned char c, tmp[256]; - int out = KEY_NULL, loop = 1, in_esc = 0, in_ascii = 0, in_control = 0, i = 0, j; - static int len = 0, pos = 0; - - if (pos >= len) - { - pos = 0; - - //len = s_receive (socket_client, buf, 255, ""); - len = read (0, buf, 255); - - //For debug - //for (j = 0; j < len; j++) - // log_std ("<--[%u]\n", (buf[j] + 256) % 256); - } - - while (pos < len) - { - c = buf[pos++]; - - if (c == '\0') - { - out = c; - break; - } - - if (c == KEY_CONTROL) - { - if (in_control == 0) - { - in_control = 1; - i = 0; - continue; - } - } - - if (in_control) - { - tmp[i++] = c; - if (i >= 2) - { - out = (int) tmp[0] * 256 + tmp[1]; - in_control = 0; - break; - } - continue; - } - - if (c == ESC_KEY) - { - if (in_esc == 0) - { - in_esc = 1; - in_ascii = 1; - i = 0; - continue; - } - else - { - out = ESC_KEY; - in_esc = 0; - break; - } - } - - in_esc = 0; - - if (in_ascii) - { - tmp[i++] = c; - if (c == 'm') - { - in_ascii = 0; - continue; - } - if (i == 2 && c >= 'A' && c <= 'D') - { - in_ascii = 0; - switch (c) - { - case 'A': - out = KEY_UP; - break; - case 'B': - out = KEY_DOWN; - break; - case 'C': - out = KEY_RIGHT; - break; - case 'D': - out = KEY_LEFT; - break; - } - break; - } - if (i == 3 && tmp[0] == 91 && tmp[2] == 126) - { - in_ascii = 0; - switch (tmp[1]) - { - case 49: - out = KEY_HOME; - break; - case 51: - out = KEY_DEL; - break; - case 52: - out = KEY_END; - break; - case 53: - out = KEY_PGUP; - break; - case 54: - out = KEY_PGDOWN; - break; - } - break; - } - continue; - } - - out = ((int) c + 256) % 256; - break; - } + // static input buffer + static unsigned char buf[LINE_BUFFER_LEN]; + static ssize_t len = 0; + static int pos = 0; + + struct epoll_event ev, events[MAX_EVENTS]; + int nfds, epollfd; + + unsigned char tmp[LINE_BUFFER_LEN]; + int out = '\0'; + int in_esc = 0; + int in_ascii = 0; + int in_control = 0; + int i = 0; + int flags; + + if (clear_buf) + { + pos = 0; + len = 0; + + return '\0'; + } - //for debug - //log_std ("-->[%u]\n", out); + epollfd = epoll_create1(0); + if (epollfd < 0) + { + log_error("epoll_create1() error (%d)\n", errno); + return -1; + } + + ev.events = EPOLLIN; + ev.data.fd = STDIN_FILENO; + if (epoll_ctl(epollfd, EPOLL_CTL_ADD, STDIN_FILENO, &ev) == -1) + { + log_error("epoll_ctl(STDIN_FILENO) error (%d)\n", errno); + return -1; + } + + flags = fcntl(STDIN_FILENO, F_GETFL, 0); + fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK); + + while (!SYS_server_exit && pos >= len) + { + nfds = epoll_wait(epollfd, events, MAX_EVENTS, 100); // 0.1 second + + if (nfds < 0) + { + if (errno != EINTR) + { + log_error("epoll_wait() error (%d)\n", errno); + fcntl(STDIN_FILENO, F_SETFL, flags); + return KEY_NULL; + } + continue; + } + else if (nfds == 0) + { + fcntl(STDIN_FILENO, F_SETFL, flags); + return KEY_TIMEOUT; + } + + for (int i = 0; i < nfds; i++) + { + if (events[i].data.fd == STDIN_FILENO) + { + while (!SYS_server_exit) // read until complete or error + { + len = read(STDIN_FILENO, buf, sizeof(buf)); + if (len < 0) + { + if (errno == EAGAIN || errno == EWOULDBLOCK) + { + fcntl(STDIN_FILENO, F_SETFL, flags); + return KEY_TIMEOUT; + } + else if (errno == EINTR) + { + continue; + } + else + { + log_error("read(STDIN) error (%d)\n", errno); + fcntl(STDIN_FILENO, F_SETFL, flags); + return KEY_NULL; + } + } + else if (len == 0) // broken pipe + { + fcntl(STDIN_FILENO, F_SETFL, flags); + return KEY_NULL; + } + + pos = 0; + break; + } + } + } + + // For debug + // for (j = 0; j < len; j++) + // log_std ("<--[%u]\n", (buf[j] + 256) % 256); + } + + fcntl(STDIN_FILENO, F_SETFL, flags); - return out; + while (pos < len) + { + unsigned char c = buf[pos++]; + + if (c == KEY_CONTROL) + { + if (in_control == 0) + { + in_control = 1; + i = 0; + continue; + } + } + + if (in_control) + { + tmp[i++] = c; + if (i >= 2) + { + out = (int)tmp[0] * 256 + tmp[1]; + in_control = 0; + break; + } + continue; + } + + if (c == ESC_KEY) + { + if (in_esc == 0) + { + in_esc = 1; + in_ascii = 1; + i = 0; + continue; + } + else + { + out = ESC_KEY; + in_esc = 0; + break; + } + } + + in_esc = 0; + + if (in_ascii) + { + tmp[i++] = c; + if (c == 'm') + { + in_ascii = 0; + continue; + } + if (i == 2 && c >= 'A' && c <= 'D') + { + in_ascii = 0; + switch (c) + { + case 'A': + out = KEY_UP; + break; + case 'B': + out = KEY_DOWN; + break; + case 'C': + out = KEY_RIGHT; + break; + case 'D': + out = KEY_LEFT; + break; + } + break; + } + if (i == 3 && tmp[0] == 91 && tmp[2] == 126) + { + in_ascii = 0; + switch (tmp[1]) + { + case 49: + out = KEY_HOME; + break; + case 51: + out = KEY_DEL; + break; + case 52: + out = KEY_END; + break; + case 53: + out = KEY_PGUP; + break; + case 54: + out = KEY_PGDN; + break; + } + break; + } + continue; + } + + out = ((int)c + 256) % 256; + break; + } + + // for debug + // log_std ("-->[%u]\n", out); + + return out; } -int -ikbhit () +int igetch_t(long int sec) { - int len; + int ch; + time_t t_begin = time(0); - ioctl (0, FIONREAD, &len); + do + { + ch = igetch(0); + } while (!SYS_server_exit && ch == KEY_TIMEOUT && (time(0) - t_begin < sec)); - return len; + return ch; }