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Project/Src/rt-thread/components/libc/termios/posix_termios.c

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+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017/08/30      Bernard      The first version
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <rtthread.h>
+#include <dfs_posix.h>
+
+#include <termios.h>
+
+int tcgetattr(int fd, struct termios *tio)
+{
+    /* Get the current serial port settings. */
+    if (ioctl(fd, TCGETA, tio))
+        return -1;
+
+    return 0;
+}
+
+int tcsetattr(int fd, int act, const struct termios *tio)
+{
+    switch (act)
+    {
+    case TCSANOW:
+        /* make the change immediately */
+        return (ioctl(fd, TCSETA, (void*)tio));
+    case TCSADRAIN:
+        /*
+         * Don't make the change until all currently written data
+         * has been transmitted.
+         */
+        return (ioctl(fd, TCSETAW, (void*)tio));
+    case TCSAFLUSH:
+        /* Don't make the change until all currently written data
+         * has been transmitted, at which point any received but
+         * unread data is also discarded.
+         */
+        return (ioctl(fd, TCSETAF, (void*)tio));
+    default:
+        errno = EINVAL;
+        return (-1);
+    }
+}
+
+/**
+ * this function gets process group ID for session leader for controlling
+ * terminal
+ *
+ * @return always 0
+ */
+pid_t tcgetsid(int fd)
+{
+    return 0;
+}
+
+speed_t cfgetospeed(const struct termios *tio)
+{
+    return tio->c_cflag & CBAUD;
+}
+
+speed_t cfgetispeed(const struct termios *tio)
+{
+    return cfgetospeed(tio);
+}
+
+int cfsetospeed(struct termios *tio, speed_t speed)
+{
+    if (speed & ~CBAUD)
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    tio->c_cflag &= ~CBAUD;
+    tio->c_cflag |= speed;
+    return 0;
+}
+
+int cfsetispeed(struct termios *tio, speed_t speed)
+{
+    return speed ? cfsetospeed(tio, speed) : 0;
+}
+
+int tcsendbreak(int fd, int dur)
+{
+    /* nonzero duration is implementation-defined, so ignore it */
+    return 0;
+}
+
+int tcflush(int fd, int queue)
+{
+    return ioctl(fd, TCFLSH, (void*)queue);
+}
+
+int tcflow(int fd, int action)
+{
+    return ioctl(fd, TCXONC, (void*)action);
+}
+
+/**
+ * this function waits for transmission of output
+ */
+int tcdrain(int fd)
+{
+    return 0;
+}
+
+int isatty (int  fd)
+{
+    struct termios term;
+
+    return tcgetattr (fd, &term) == 0;
+}
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+void cfmakeraw(struct termios *t)
+{
+    t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+    t->c_oflag &= ~OPOST;
+    t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+    t->c_cflag &= ~(CSIZE|PARENB);
+    t->c_cflag |= CS8;
+    t->c_cc[VMIN] = 1;
+    t->c_cc[VTIME] = 0;
+}
+
+int cfsetspeed(struct termios *tio, speed_t speed)
+{
+    return cfsetospeed(tio, speed);
+}
+#endif
+