+ switch (stopbits) {
+ case 1:
+ /* Do nothing, a cleared CSTOPB entry means "1 stop bit". */
+ break;
+ case 2:
+ term.c_cflag |= CSTOPB;
+ break;
+ default:
+ sr_err("Unsupported stopbits number: %d.", stopbits);
+ return SR_ERR;
+ }
+
+ term.c_iflag &= ~(IXON | IXOFF);
+ term.c_cflag &= ~CRTSCTS;
+ switch (flowcontrol) {
+ case 0:
+ /* No flow control. */
+ sr_dbg("FD %d: Configuring no flow control.", fd);
+ break;
+ case 1:
+ sr_dbg("FD %d: Configuring RTS/CTS flow control.", fd);
+ term.c_cflag |= CRTSCTS;
+ break;
+ case 2:
+ sr_dbg("FD %d: Configuring XON/XOFF flow control.", fd);
+ term.c_iflag |= IXON | IXOFF;
+ break;
+ default:
+ sr_err("Unsupported flow control setting: %d.", flowcontrol);
+ return SR_ERR;
+ }
+
+ term.c_iflag &= ~IGNPAR;
+ term.c_cflag &= ~(PARODD | PARENB);
+ switch (parity) {
+ case SERIAL_PARITY_NONE:
+ sr_dbg("FD %d: Configuring no parity.", fd);
+ term.c_iflag |= IGNPAR;
+ break;
+ case SERIAL_PARITY_EVEN:
+ sr_dbg("FD %d: Configuring even parity.", fd);
+ term.c_cflag |= PARENB;
+ break;
+ case SERIAL_PARITY_ODD:
+ sr_dbg("FD %d: Configuring odd parity.", fd);
+ term.c_cflag |= PARENB | PARODD;
+ break;
+ default:
+ sr_err("Unsupported parity setting: %d.", parity);
+ return SR_ERR;
+ }
+
+ /* Do NOT translate carriage return to newline on input. */
+ term.c_iflag &= ~(ICRNL);
+
+ /* Disable canonical mode, and don't echo input characters. */
+ term.c_lflag &= ~(ICANON | ECHO);
+
+ /* Write the configured settings. */
+ if (tcsetattr(fd, TCSADRAIN, &term) < 0) {
+ sr_err("tcsetattr() error: %ѕ.", strerror(errno));
+ return SR_ERR;
+ }
+#endif
+
+ return SR_OK;
+}
+
+#define SERIAL_COMM_SPEC "^(\\d+)/([78])([neo])([12])$"
+SR_PRIV int serial_set_paramstr(int fd, const char *paramstr)
+{
+ GRegex *reg;
+ GMatchInfo *match;
+ int speed, databits, parity, stopbits;
+ char *mstr;
+
+ speed = databits = parity = stopbits = 0;
+ reg = g_regex_new(SERIAL_COMM_SPEC, 0, 0, NULL);
+ if (g_regex_match(reg, paramstr, 0, &match)) {
+ if ((mstr = g_match_info_fetch(match, 1)))
+ speed = strtoul(mstr, NULL, 10);
+ g_free(mstr);
+ if ((mstr = g_match_info_fetch(match, 2)))
+ databits = strtoul(mstr, NULL, 10);
+ g_free(mstr);
+ if ((mstr = g_match_info_fetch(match, 3))) {
+ switch (mstr[0]) {
+ case 'n':
+ parity = SERIAL_PARITY_NONE;
+ break;
+ case 'e':
+ parity = SERIAL_PARITY_EVEN;
+ break;
+ case 'o':
+ parity = SERIAL_PARITY_ODD;
+ break;
+ }
+ }
+ g_free(mstr);
+ if ((mstr = g_match_info_fetch(match, 4)))
+ stopbits = strtoul(mstr, NULL, 10);
+ g_free(mstr);
+ }
+ g_match_info_unref(match);
+ g_regex_unref(reg);
+
+ if (speed)
+ return serial_set_params(fd, speed, databits, parity, stopbits, 0);
+ else
+ return SR_ERR_ARG;
+}
+
+SR_PRIV int serial_readline(int fd, char **buf, int *buflen,
+ uint64_t timeout_ms)
+{
+ uint64_t start;
+ int maxlen, len;
+
+ timeout_ms *= 1000;
+ start = g_get_monotonic_time();
+
+ maxlen = *buflen;
+ *buflen = len = 0;
+ while(1) {
+ len = maxlen - *buflen - 1;
+ if (len < 1)
+ break;
+ len = serial_read(fd, *buf + *buflen, 1);
+ if (len > 0) {
+ *buflen += len;
+ *(*buf + *buflen) = '\0';
+ if (*buflen > 0 && *(*buf + *buflen - 1) == '\r') {
+ /* Strip LF and terminate. */
+ *(*buf + --*buflen) = '\0';
+ break;
+ }
+ }
+ if (g_get_monotonic_time() - start > timeout_ms)
+ /* Timeout */
+ break;
+ g_usleep(2000);
+ }
+ sr_dbg("Received %d: '%s'.", *buflen, *buf);