--- lbbs/src/io.c 2004/11/30 07:10:32 1.3 +++ lbbs/src/io.c 2025/10/20 01:55:50 1.60 @@ -1,184 +1,1072 @@ /*************************************************************************** - 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 "common.h" -#include +#include "io.h" +#include "log.h" +#include +#include #include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +char stdio_charset[20] = BBS_DEFAULT_CHARSET; + +// static input / output buffer +static char stdin_buf[LINE_BUFFER_LEN]; +static char stdout_buf[BUFSIZ]; +static int stdin_buf_len = 0; +static int stdout_buf_len = 0; +static int stdin_buf_offset = 0; +static int stdout_buf_offset = 0; + +static char stdin_conv[LINE_BUFFER_LEN * 2]; +static char stdout_conv[BUFSIZ * 2]; +static int stdin_conv_len = 0; +static int stdout_conv_len = 0; +static int stdin_conv_offset = 0; +static int stdout_conv_offset = 0; + +static iconv_t stdin_cd = NULL; +static iconv_t stdout_cd = NULL; + +int prints(const char *format, ...) +{ + char buf[BUFSIZ]; + va_list args; + int ret; + + va_start(args, format); + ret = vsnprintf(buf, sizeof(buf), format, args); + va_end(args); + + 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); + log_error("Output buffer is full, additional %d is required\n", ret); + } + } + + return ret; +} + +int outc(char c) +{ + int ret; + + if (stdout_buf_len + 1 > BUFSIZ) + { + iflush(); + } + + if (stdout_buf_len + 1 <= BUFSIZ) + { + stdout_buf[stdout_buf_len] = c; + stdout_buf_len++; + } + else + { + errno = EAGAIN; + ret = -1; + } + + return ret; +} + +int iflush(void) +{ + 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; + } + + 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); + if (close(epollfd) < 0) + { + log_error("close(epoll) error (%d)\n"); + } + 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; + } + + for (int i = 0; i < nfds; i++) + { + if (events[i].data.fd == STDOUT_FILENO) + { + if (stdout_buf_offset < stdout_buf_len) + { + ret = io_buf_conv(stdout_cd, stdout_buf, &stdout_buf_len, &stdout_buf_offset, stdout_conv, sizeof(stdout_conv), &stdout_conv_len); + if (ret < 0) + { + log_error("io_buf_conv(stdout, %d, %d, %d) error\n", stdout_buf_len, stdout_buf_offset, stdout_conv_len); + stdout_buf_len = stdout_buf_offset; // Discard invalid sequence + } + } + + while (stdout_conv_offset < stdout_conv_len && !SYS_server_exit) // write until complete or error + { + if (SSH_v2) + { + ret = ssh_channel_write(SSH_channel, stdout_conv + stdout_conv_offset, (uint32_t)(stdout_conv_len - stdout_conv_offset)); + if (ret == SSH_ERROR) + { + log_error("ssh_channel_write() error: %s\n", ssh_get_error(SSH_session)); + retry = 0; + break; + } + } + else + { + ret = (int)write(STDOUT_FILENO, stdout_conv + stdout_conv_offset, (size_t)(stdout_conv_len - stdout_conv_offset)); + } + if (ret < 0) + { + if (errno == EAGAIN || errno == EWOULDBLOCK) + { + break; + } + else if (errno == EINTR) + { + continue; + } + else + { +#ifdef _DEBUG + log_error("write(STDOUT) error (%d)\n", errno); +#endif + retry = 0; + break; + } + } + else if (ret == 0) // broken pipe + { + retry = 0; + break; + } + else + { + stdout_conv_offset += ret; + if (stdout_conv_offset >= stdout_conv_len) // flush buffer completely + { + ret = 0; + stdout_conv_offset = 0; + stdout_conv_len = 0; + retry = 0; + break; + } + continue; + } + } + } + } + } + + // Restore STDOUT flags + fcntl(STDOUT_FILENO, F_SETFL, flags); + + if (close(epollfd) < 0) + { + log_error("close(epoll) error (%d)\n"); + } + + return ret; +} + +int igetch(int timeout) +{ + struct epoll_event ev, events[MAX_EVENTS]; + int nfds, epollfd; + int ret; + int loop; + + unsigned char tmp[LINE_BUFFER_LEN]; + int out = KEY_NULL; + int in_esc = 0; + int in_ascii = 0; + int in_control = 0; + int i = 0; + int flags; + + if (stdin_conv_offset >= stdin_conv_len) + { + stdin_conv_len = 0; + stdin_conv_offset = 0; + + 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); + + if (close(epollfd) < 0) + { + log_error("close(epoll) error (%d)\n"); + } + return -1; + } + + flags = fcntl(STDIN_FILENO, F_GETFL, 0); + fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK); + + for (loop = 1; loop && stdin_buf_len < sizeof(stdin_buf) && stdin_conv_offset >= stdin_conv_len && !SYS_server_exit;) + { + if (SSH_v2 && ssh_channel_is_closed(SSH_channel)) + { + log_error("SSH channel is closed\n"); + loop = 0; + break; + } + + nfds = epoll_wait(epollfd, events, MAX_EVENTS, timeout); + + if (nfds < 0) + { + if (errno != EINTR) + { + log_error("epoll_wait() error (%d)\n", errno); + break; + } + continue; + } + else if (nfds == 0) // timeout + { + out = KEY_TIMEOUT; + break; + } + + for (int i = 0; i < nfds; i++) + { + if (events[i].data.fd == STDIN_FILENO) + { + while (stdin_buf_len < sizeof(stdin_buf) && !SYS_server_exit) // read until complete or error + { + if (SSH_v2) + { + ret = ssh_channel_read_nonblocking(SSH_channel, stdin_buf + stdin_buf_len, sizeof(stdin_buf) - (uint32_t)stdin_buf_len, 0); + if (ret == SSH_ERROR) + { + log_error("ssh_channel_read_nonblocking() error: %s\n", ssh_get_error(SSH_session)); + loop = 0; + break; + } + else if (ret == SSH_EOF) + { + loop = 0; + break; + } + else if (ret == 0) + { + out = 0; + loop = 0; + break; + } + } + else + { + ret = (int)read(STDIN_FILENO, stdin_buf + stdin_buf_len, sizeof(stdin_buf) - (size_t)stdin_buf_len); + } + if (ret < 0) + { + if (errno == EAGAIN || errno == EWOULDBLOCK) + { + out = 0; + loop = 0; + break; + } + else if (errno == EINTR) + { + continue; + } + else + { +#ifdef _DEBUG + log_error("read(STDIN) error (%d)\n", errno); +#endif + loop = 0; + break; + } + } + else if (ret == 0) // broken pipe + { + loop = 0; + break; + } + else + { + stdin_buf_len += ret; + continue; + } + } + } + } + + // For debug +#ifdef _DEBUG + for (int j = stdin_buf_offset; j < stdin_buf_len; j++) + { + log_error("Debug input: <--[%u]\n", (stdin_buf[j] + 256) % 256); + } +#endif + } + + fcntl(STDIN_FILENO, F_SETFL, flags); + + if (close(epollfd) < 0) + { + log_error("close(epoll) error (%d)\n"); + } + + if (stdin_buf_offset < stdin_buf_len) + { + ret = io_buf_conv(stdin_cd, stdin_buf, &stdin_buf_len, &stdin_buf_offset, stdin_conv, sizeof(stdin_conv), &stdin_conv_len); + if (ret < 0) + { + log_error("io_buf_conv(stdin, %d, %d, %d) error\n", stdin_buf_len, stdin_buf_offset, stdin_conv_len); + stdin_buf_len = stdin_buf_offset; // Discard invalid sequence + } + + // For debug +#ifdef _DEBUG + for (int j = stdin_conv_offset; j < stdin_conv_len; j++) + { + log_error("Debug input_conv: <--[%u]\n", (stdin_conv[j] + 256) % 256); + } +#endif + } + } + + while (stdin_conv_offset < stdin_conv_len) + { + unsigned char c = (unsigned char)stdin_conv[stdin_conv_offset++]; + + // Convert \r\n to \r + if (c == CR && stdin_conv_offset < stdin_conv_len && stdin_conv[stdin_conv_offset] == LF) + { + stdin_conv_offset++; + } + + // Convert single \n to \r + if (c == LF) + { + c = CR; + } + + 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 == KEY_ESC) + { + if (in_esc == 0) + { + in_esc = 1; + in_ascii = 1; + i = 0; + continue; + } + else + { + out = KEY_CSI; + in_esc = 0; + break; + } + } + + in_esc = 0; + + if (in_ascii) + { + tmp[i++] = c; + if (i == 2 && (tmp[0] == 79 || tmp[0] == 91)) + { + in_ascii = 0; + switch (tmp[1]) + { + case 65: + out = KEY_UP; + break; + case 66: + out = KEY_DOWN; + break; + case 67: + out = KEY_RIGHT; + break; + case 68: + out = KEY_LEFT; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 2 && tmp[0] == 91) // Fterm + { + in_ascii = 0; + switch (tmp[1]) + { + case 86: + out = KEY_SHIFT_F1; + break; + case 90: + out = KEY_SHIFT_F2; + break; + case 97: + out = KEY_SHIFT_F3; + break; + case 98: + out = KEY_SHIFT_F4; + break; + case 99: + out = KEY_SHIFT_F5; + break; + case 100: + out = KEY_SHIFT_F6; + break; + case 101: + out = KEY_SHIFT_F7; + break; + case 102: + out = KEY_SHIFT_F8; + break; + case 103: + out = KEY_SHIFT_F9; + break; + case 104: + out = KEY_SHIFT_F10; + break; + case 107: + out = KEY_CTRL_F1; + break; + case 108: + out = KEY_CTRL_F2; + break; + case 109: + out = KEY_CTRL_F3; + break; + case 112: + out = KEY_CTRL_F6; + break; + case 113: + out = KEY_CTRL_F7; + break; + case 114: + out = KEY_CTRL_F8; + break; + case 115: + out = KEY_CTRL_F9; + break; + case 116: + out = KEY_CTRL_F10; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 2 && tmp[0] == 79) // Xterm + { + in_ascii = 0; + switch (tmp[1]) + { + case 80: + out = KEY_F1; + break; + case 81: + out = KEY_F2; + break; + case 82: + out = KEY_F3; + break; + case 83: + out = KEY_F4; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 3 && tmp[0] == 91 && tmp[2] == 126) + { + in_ascii = 0; + switch (tmp[1]) + { + case 49: + out = KEY_HOME; + break; + case 50: + out = KEY_INS; + 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; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 4 && tmp[0] == 91 && tmp[1] == 49 && tmp[3] == 126) // Fterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 49: + out = KEY_F1; + break; + case 50: + out = KEY_F2; + break; + case 51: + out = KEY_F3; + break; + case 52: + out = KEY_F4; + break; + case 53: + out = KEY_F5; + break; + case 55: + out = KEY_F6; + break; + case 56: + out = KEY_F7; + break; + case 57: + out = KEY_F8; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 4 && tmp[0] == 91 && tmp[1] == 50 && tmp[3] == 126) // Fterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 48: + out = KEY_F9; + break; + case 49: + out = KEY_F10; + break; + case 50: + out = KEY_F11; // Fterm + break; + case 51: + out = KEY_F11; // Xterm + break; + case 52: + out = KEY_F12; // Xterm + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 5 && tmp[0] == 91 && tmp[1] == 49 && tmp[2] == 59 && tmp[3] == 53) // Xterm + { + in_ascii = 0; + switch (tmp[4]) + { + case 65: + out = KEY_CTRL_UP; + break; + case 66: + out = KEY_CTRL_DOWN; + break; + case 67: + out = KEY_CTRL_RIGHT; + break; + case 68: + out = KEY_CTRL_LEFT; + break; + case 70: + out = KEY_CTRL_END; + break; + case 72: + out = KEY_CTRL_HOME; + break; + case 80: + out = KEY_CTRL_F1; + break; + case 81: + out = KEY_CTRL_F2; + break; + case 82: + out = KEY_CTRL_F3; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 6 && tmp[0] == 91 && tmp[1] == 49 && tmp[3] == 59 && tmp[4] == 53 && tmp[5] == 126) // Xterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 53: + out = KEY_CTRL_F5; + break; + case 55: + out = KEY_CTRL_F6; + break; + case 56: + out = KEY_CTRL_F7; + break; + case 57: + out = KEY_CTRL_F8; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 6 && tmp[0] == 91 && tmp[1] == 50 && tmp[3] == 59 && tmp[4] == 53 && tmp[5] == 126) // Xterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 48: + out = KEY_CTRL_F9; + break; + case 49: + out = KEY_CTRL_F10; + break; + case 51: + out = KEY_CTRL_F11; + break; + case 52: + out = KEY_CTRL_F12; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 5 && tmp[0] == 91 && tmp[1] == 49 && tmp[2] == 59 && tmp[3] == 50) // Xterm + { + in_ascii = 0; + switch (tmp[4]) + { + case 80: + out = KEY_SHIFT_F1; + break; + case 81: + out = KEY_SHIFT_F2; + break; + case 82: + out = KEY_SHIFT_F3; + break; + case 83: + out = KEY_SHIFT_F4; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 6 && tmp[0] == 91 && tmp[1] == 49 && tmp[3] == 59 && tmp[4] == 50 && tmp[5] == 126) // Xterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 53: + out = KEY_SHIFT_F5; + break; + case 55: + out = KEY_SHIFT_F6; + break; + case 56: + out = KEY_SHIFT_F7; + break; + case 57: + out = KEY_SHIFT_F8; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + if (i == 6 && tmp[0] == 91 && tmp[1] == 50 && tmp[3] == 59 && tmp[4] == 50 && tmp[5] == 126) // Xterm + { + in_ascii = 0; + switch (tmp[2]) + { + case 48: + out = KEY_SHIFT_F9; + break; + case 49: + out = KEY_SHIFT_F10; + break; + case 51: + out = KEY_SHIFT_F11; + break; + case 52: + out = KEY_SHIFT_F12; + break; + default: + in_ascii = 1; + } + if (!in_ascii) + { + break; + } + } + + if (c == 'm') + { + in_ascii = 0; + } + continue; + } + + out = ((int)c + 256) % 256; + break; + } + + // For ESC key + if (out == 0 && in_esc) + { + out = KEY_ESC; + } + + // for debug +#ifdef _DEBUG + if (out != KEY_TIMEOUT && out != KEY_NULL) + { + log_error("Debug: -->[0x %x]\n", out); + } +#endif + + return out; +} + +int igetch_t(int sec) +{ + int ch; + time_t t_begin = time(NULL); + + do + { + ch = igetch(100); + } while (!SYS_server_exit && ch == KEY_TIMEOUT && (time(NULL) - t_begin < sec)); + + return ch; +} + +void igetch_reset() +{ + int ch; + do + { + ch = igetch(100); + } while (ch != KEY_NULL && ch != KEY_TIMEOUT); +} -int -outc(char c) +int io_buf_conv(iconv_t cd, char *p_buf, int *p_buf_len, int *p_buf_offset, char *p_conv, size_t conv_size, int *p_conv_len) { - int retval; + char *in_buf; + char *out_buf; + size_t in_bytes; + size_t out_bytes; + int ret; + int in_control = 0; + size_t i = 0; + + if (cd == NULL || p_buf == NULL || p_buf_len == NULL || p_buf_offset == NULL || p_conv == NULL || p_conv_len == NULL) + { + log_error("NULL pointer error\n"); + return -1; + } + + in_buf = p_buf + *p_buf_offset; + in_bytes = (size_t)(*p_buf_len - *p_buf_offset); + out_buf = p_conv + *p_conv_len; + out_bytes = conv_size - (size_t)(*p_conv_len); + + while (in_bytes > 0) + { + if ((unsigned char)(*in_buf) == KEY_CONTROL) + { + if (in_control == 0) + { + in_control = 1; + i = 0; + } + } + + if (in_control) + { + if (out_bytes <= 0) + { + log_error("No enough free space in p_conv, conv_len=%d, conv_size=%d\n", *p_conv_len, conv_size); + return -2; + } + + *out_buf = *in_buf; + in_buf++; + out_buf++; + in_bytes--; + out_bytes--; + + (*p_buf_offset)++; + *p_conv_len = (int)(conv_size - out_bytes); + + i++; + if (i >= 2) + { + in_control = 0; + } + continue; + } + + ret = (int)iconv(cd, &in_buf, &in_bytes, &out_buf, &out_bytes); + if (ret == -1) + { + if (errno == EINVAL) // Incomplete + { +#ifdef _DEBUG + log_error("iconv(inbytes=%d, outbytes=%d) error: EINVAL, in_buf[0]=%d\n", in_bytes, out_bytes, in_buf[0]); +#endif + if (p_buf != in_buf) + { + *p_buf_len = (int)(p_buf + *p_buf_len - in_buf); + *p_buf_offset = 0; + *p_conv_len = (int)(conv_size - out_bytes); + memmove(p_buf, in_buf, (size_t)(*p_buf_len)); + } + + break; + } + else if (errno == E2BIG) + { + log_error("iconv(inbytes=%d, outbytes=%d) error: E2BIG\n", in_bytes, out_bytes); + return -1; + } + else if (errno == EILSEQ) + { + if (in_bytes > out_bytes || out_bytes <= 0) + { + log_error("iconv(inbytes=%d, outbytes=%d) error: EILSEQ and E2BIG\n", in_bytes, out_bytes); + return -2; + } + + // reset in_bytes when "//IGNORE" is applied + if (in_bytes == 0) + { + in_bytes = (size_t)(*p_buf_len - *p_buf_offset); + } + + *out_buf = *in_buf; + in_buf++; + out_buf++; + in_bytes--; + out_bytes--; - retval = fprintf(stdout, "%c", c); + continue; + } + } + else + { + *p_buf_len = 0; + *p_buf_offset = 0; + *p_conv_len = (int)(conv_size - out_bytes); + + break; + } + } - return retval; + return 0; } -int -prints(const char * format, ...) -{ - va_list args; - int retval; - - va_start (args, format); - retval = vfprintf (stdout, format, args); - va_end (args); - - return retval; -} - -int -iflush() -{ - int retval; - - retval = fflush (stdout); - - return retval; -} - -int -igetch () -{ - static char buf[256]; - unsigned char c, tmp[256]; - int out = 0, loop = 1, in_esc = 0, in_ascii = 0, in_control = 0, i = 0, j; - static int len = 0 , pos = 0; - - if (pos >= len) - { - len = s_receive (socket_client, buf, 255, ""); - pos = 0; - - //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 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; - } +int io_conv_init(const char *charset) +{ + char tocode[32]; + + if (charset == NULL) + { + log_error("NULL pointer error\n"); + return -1; + } + + io_conv_cleanup(); + + strncpy(stdio_charset, charset, sizeof(stdio_charset) - 1); + stdio_charset[sizeof(stdio_charset) - 1] = '\0'; + + snprintf(tocode, sizeof(tocode), "%s%s", BBS_DEFAULT_CHARSET, + (strcasecmp(stdio_charset, BBS_DEFAULT_CHARSET) == 0 ? "" : "//IGNORE")); + stdin_cd = iconv_open(tocode, stdio_charset); + if (stdin_cd == (iconv_t)(-1)) + { + log_error("iconv_open(%s->%s) error: %d\n", stdio_charset, tocode, errno); + return -2; + } + + snprintf(tocode, sizeof(tocode), "%s%s", stdio_charset, + (strcasecmp(BBS_DEFAULT_CHARSET, stdio_charset) == 0 ? "" : "//TRANSLIT")); + stdout_cd = iconv_open(tocode, BBS_DEFAULT_CHARSET); + if (stdout_cd == (iconv_t)(-1)) + { + log_error("iconv_open(%s->%s) error: %d\n", BBS_DEFAULT_CHARSET, tocode, errno); + iconv_close(stdin_cd); + return -2; + } + + return 0; +} - //for debug - //log_std ("-->[%u]\n", out); +int io_conv_cleanup(void) +{ + if (stdin_cd != NULL) + { + iconv_close(stdin_cd); + stdin_cd = NULL; + } + if (stdout_cd != NULL) + { + iconv_close(stdout_cd); + stdout_cd = NULL; + } - return out; + return 0; }