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Add run time options to RPi gateway

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This commit is contained in:
Marcelo Aquino
2016-09-08 15:56:37 -03:00
parent b4f4e28545
commit 09103e9c04
13 changed files with 178 additions and 77 deletions
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drivers/Linux/SerialPort.cpp
+14 -19
View File
@@ -28,6 +28,7 @@
#include <grp.h>
#include <errno.h>
#include <sys/stat.h>
#include "log.h"
#include "SerialPort.h"
SerialPort::SerialPort(const char *port, bool isPty) : serialPort(std::string(port)), isPty(isPty)
@@ -38,7 +39,7 @@ SerialPort::SerialPort(const char *port, bool isPty) : serialPort(std::string(po
void SerialPort::begin(int bauds)
{
if (!open(bauds)) {
fprintf(stderr, "Failed to open serial port.\n");
mys_log(LOG_ERR, "Failed to open serial port.\n");
exit(1);
}
}
@@ -51,35 +52,29 @@ bool SerialPort::open(int bauds)
if (isPty) {
sd = posix_openpt(O_RDWR | O_NOCTTY | O_NDELAY);
if (sd < 0) {
perror("Couldn't open a PTY");
mys_log(LOG_ERR, "Couldn't open a PTY: %s\n", strerror(errno));
return false;
}
if (grantpt(sd) != 0) {
perror("Couldn't grant permission to the PTY");
mys_log(LOG_ERR, "Couldn't grant permission to the PTY: %s\n", strerror(errno));
return false;
}
if (unlockpt(sd) != 0) {
perror("Couldn't unlock the PTY");
return false;
}
// Get the current options of the port
if (tcgetattr(sd, &options) < 0) {
perror("Couldn't get term attributes");
mys_log(LOG_ERR, "Couldn't unlock the PTY: %s\n", strerror(errno));
return false;
}
/* create a symlink with predictable name to the PTY device */
unlink(serialPort.c_str()); // remove the symlink if it already exists
if (symlink(ptsname(sd), serialPort.c_str()) != 0) {
fprintf(stderr, "Couldn't create a symlink '%s' to PTY! (%d) %s\n", serialPort.c_str(), errno, strerror(errno));
mys_log(LOG_ERR, "Couldn't create a symlink '%s' to PTY! (%d) %s\n", serialPort.c_str(), errno, strerror(errno));
return false;
}
} else {
if ((sd = ::open(serialPort.c_str(), O_RDWR | O_NOCTTY | O_NDELAY)) == -1) {
fprintf(stderr, "Unable to open the serial port %s\n", serialPort.c_str());
mys_log(LOG_ERR, "Unable to open the serial port %s\n", serialPort.c_str());
return false;
}
@@ -109,7 +104,7 @@ bool SerialPort::open(int bauds)
// Get the current options of the port
if (tcgetattr(sd, &options) < 0) {
perror("Couldn't get term attributes");
mys_log(LOG_ERR, "Couldn't get term attributes: %s\n", strerror(errno));
return false;
}
@@ -132,13 +127,13 @@ bool SerialPort::open(int bauds)
// Set parameters
if (tcsetattr(sd, TCSANOW, &options) < 0) {
perror("Couldn't set term attributes");
mys_log(LOG_ERR, "Couldn't set term attributes: %s\n", strerror(errno));
return false;
}
// flush
if (tcflush(sd, TCIOFLUSH) < 0) {
perror("Couldn't flush serial");
mys_log(LOG_ERR, "Couldn't flush serial: %s\n", strerror(errno));
return false;
}
@@ -157,7 +152,7 @@ bool SerialPort::setGroupPerm(const char *groupName)
if (sd != -1 && groupName != NULL) {
devGrp = getgrnam(groupName);
if (devGrp == NULL) {
fprintf(stderr, "getgrnam: %s failed. (%d) %s\n", groupName, errno, strerror(errno));
mys_log(LOG_ERR, "getgrnam: %s failed. (%d) %s\n", groupName, errno, strerror(errno));
return false;
}
@@ -169,13 +164,13 @@ bool SerialPort::setGroupPerm(const char *groupName)
ret = chown(dev, -1, devGrp->gr_gid);
if (ret == -1) {
fprintf(stderr, "Could not change PTY owner! (%d) %s\n", errno, strerror(errno));
mys_log(LOG_ERR, "Could not change PTY owner! (%d) %s\n", errno, strerror(errno));
return false;
}
ret = chmod(dev, ttyPermissions);
if (ret != 0) {
fprintf(stderr, "Could not change PTY permissions! (%d) %s\n", errno, strerror(errno));
mys_log(LOG_ERR, "Could not change PTY permissions! (%d) %s\n", errno, strerror(errno));
return false;
}
@@ -189,7 +184,7 @@ int SerialPort::available()
int nbytes = 0;
if (ioctl(sd, FIONREAD, &nbytes) < 0) {
fprintf(stderr, "Failed to get byte count on serial.\n");
mys_log(LOG_ERR, "Failed to get byte count on serial.\n");
exit(-1);
}
return nbytes;