133 lines
2.3 KiB
C
133 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000
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* Murray Jensen <Murray.Jensen@csiro.au>
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*/
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include "serial.h"
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#if defined(__sun__) || \
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defined(__OpenBSD__) || \
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defined(__FreeBSD__) || \
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defined(__NetBSD__) || \
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defined(__APPLE__)
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static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, { 0 } };
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#else
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static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, 0 };
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#endif
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static struct speedmap {
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char *str;
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speed_t val;
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} speedmap[] = {
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{ "50", B50 }, { "75", B75 }, { "110", B110 },
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{ "134", B134 }, { "150", B150 }, { "200", B200 },
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{ "300", B300 }, { "600", B600 }, { "1200", B1200 },
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{ "1800", B1800 }, { "2400", B2400 }, { "4800", B4800 },
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{ "9600", B9600 }, { "19200", B19200 }, { "38400", B38400 },
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{ "57600", B57600 },
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#ifdef B76800
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{ "76800", B76800 },
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#endif
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{ "115200", B115200 },
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#ifdef B153600
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{ "153600", B153600 },
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#endif
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{ "230400", B230400 },
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#ifdef B307200
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{ "307200", B307200 },
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#endif
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#ifdef B460800
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{ "460800", B460800 }
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#endif
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};
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static int nspeeds = sizeof speedmap / sizeof speedmap[0];
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speed_t
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cvtspeed(char *str)
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{
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struct speedmap *smp = speedmap, *esmp = &speedmap[nspeeds];
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while (smp < esmp) {
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if (strcmp(str, smp->str) == 0)
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return (smp->val);
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smp++;
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}
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return B0;
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}
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int
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serialopen(char *device, speed_t speed)
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{
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int fd;
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if (cfsetospeed(&tios, speed) < 0)
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return -1;
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if ((fd = open(device, O_RDWR)) < 0)
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return -1;
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if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
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(void)close(fd);
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return -1;
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}
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return fd;
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}
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int
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serialreadchar(int fd, int timeout)
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{
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fd_set fds;
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struct timeval tv;
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int n;
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char ch;
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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FD_ZERO(&fds);
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FD_SET(fd, &fds);
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/* this is a fucking horrible quick hack - fix this */
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if ((n = select(fd + 1, &fds, 0, 0, &tv)) < 0)
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return SERIAL_ERROR;
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if (n == 0)
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return SERIAL_TIMEOUT;
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if ((n = read(fd, &ch, 1)) < 0)
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return SERIAL_ERROR;
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if (n == 0)
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return SERIAL_EOF;
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return ch;
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}
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int
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serialwrite(int fd, char *buf, int len)
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{
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int n;
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do {
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n = write(fd, buf, len);
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if (n < 0)
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return 1;
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len -= n;
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buf += n;
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} while (len > 0);
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return 0;
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}
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int
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serialclose(int fd)
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{
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return close(fd);
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}
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