comgt: Allow using non-TTY devices

Some Huawei mobile broadband sticks utilizing the NCM protocol expose the control channel as a cdc-wdm device node instead of a virtual TTY. This device node does not support the terminal ioctls. This patch adds a check whether the provided device is a TTY or not and does not attempt to use the terminal ioctls if they are not supported. v2: reduce diffstat by simplifying code a little Signed-off-by: Matti Laakso <malaakso@elisanet.fi> SVN-Revision: 44054
10 years ago · eb6acdf6b4
parent 7aba4f1539
commit eb6acdf6b4
1 changed files with 68 additions and 0 deletions
--- a/package/network/utils/comgt/patches/004-check_tty.patch
+++ b/package/network/utils/comgt/patches/004-check_tty.patch
@ -0,0 +1,68 @@
+--- a/comgt.c
+++ b/comgt.c
+@@ -91,6 +91,7 @@ unsigned long hstart,hset;
+ char NullString[]={ "" };
+ BOOL lastcharnl=1; /* Indicate that last char printed from getonebyte
+                                was a nl, so no new one is needed */
+BOOL tty=1;
+ 
+ 
+ //"open com \"/dev/modem\"\nset com 38400n81\nset senddelay 0.05\nsend \"ATi^m\"\nget 2 \" ^m\" $s\nprint \"Response : \",$s,\"\\n\"\nget 2 \" ^m\" $s\nprint \"Response :\",$s,\"\\n\"\nget 2 \" ^m\" $s\nprint \"Response : \",$s,\"\\n\"\n\n";
+@@ -920,7 +921,7 @@ BOOL getonoroff(void) {
+ void setcom(void) {
+   stbuf.c_cflag &= ~(CBAUD | CSIZE | CSTOPB | CLOCAL | PARENB);
+   stbuf.c_cflag |= (speed | bits | CREAD | clocal | parity | stopbits );
+-  if (ioctl(comfd, TCSETA, &stbuf) < 0) {
+  if (tty && ioctl(comfd, TCSETA, &stbuf) < 0) {
+     serror("Can't ioctl set device",1);
+   }
+ }
+@@ -1224,7 +1225,7 @@ void doclose(void) {
+   if(strcmp(token,"hardcom")==0) {
+     if(comfd== -1) serror("Com device not open",1);
+     vmsg("Closing device");
+-    if (ioctl(comfd, TCSETA, &svbuf) < 0) {
+    if (tty && ioctl(comfd, TCSETA, &svbuf) < 0) {
+       sprintf(msg,"Can't ioctl set device %s.\n",device);
+       serror(msg,1);
+     }
+@@ -1266,12 +1267,17 @@ void opengt(void) {
+       ext(1);
+     }
+   }
+-  if (ioctl (comfd, TCGETA, &svbuf) < 0) {
+  if (isatty (comfd))
+    tty=1;
+  else
+    tty=0;
+  if (tty && ioctl (comfd, TCGETA, &svbuf) < 0) {
+     sprintf(msg,"Can't control %s, please try again.\n",device);
+     serror(msg,1);
+   }
+   setenv("COMGTDEVICE",device,1);
+-  ioctl(comfd, TCGETA, &stbuf);
+  if (tty)
+    ioctl(comfd, TCGETA, &stbuf);
+   speed=stbuf.c_cflag & CBAUD;
+   if (high_speed == 0)  strcpy(cspeed,"115200");
+   else strcpy(cspeed,"57600");
+@@ -1302,12 +1308,16 @@ void opendevice(void) {
+     }
+   }
+   else comfd=0;
+-
+-  if (ioctl (comfd, TCGETA, &svbuf) < 0) {
+  if (isatty (comfd))
+    tty=1;
+  else
+    tty=0;
+  if (tty && ioctl (comfd, TCGETA, &svbuf) < 0) {
+     sprintf(msg,"Can't ioctl get device %s.\n",device);
+     serror(msg,1);
+   }
+-  ioctl(comfd, TCGETA, &stbuf);
+  if (tty)
+    ioctl(comfd, TCGETA, &stbuf);
+   speed=stbuf.c_cflag & CBAUD;
+   switch(speed) {
+     case B0: strcpy(cspeed,"0");break;