Issue 319, detach all devices on SIGKILL/SIGTERM (#328)

* Removed size validation for MOs

* rasctl -D detaches all devices

* Detach all devices on Ctrl-C (KILL signal)

* Added comment

* Also detach all devices on SIGTERM

doc/rasctl.1

@@ -8,26 +8,27 @@ rasctl \- Sends management commands to the rascsi process
 \fB\-m\fR |
 \fB\-s\fR |
 \fB\-v\fR |
+\fB\-D\fR |
 \fB\-I\fR |
 \fB\-L\fR |
 \fB\-O\fR |
 \fB\-T\fR |
 \fB\-V\fR |
+[\fB\-C\fR \fIFILENAME:FILESIZE\fR]
 [\fB\-E\fR \fIFILENAME\fR]
 [\fB\-F\fR \fIIMAGE_FOLDER\fR]
-[\fB\-C\fR \fIFILENAME:FILESIZE\fR]
-[\fB\-x\fR \fICURRENT_NAME:NEW_NAME\fR]
 [\fB\-R\fR \fICURRENT_NAME:NEW_NAME\fR]
-[\fB\-g\fR \fILOG_LEVEL\fR]
-[\fB\-h\fR \fIHOST\fR]
-[\fB\-p\fR \fIPORT\fR]
-[\fB\-r\fR \fIRESERVED_IDS\fR]
-[\fB\-i\fR \fIID\fR
 [\fB\-c\fR \fICMD\fR]
 [\fB\-f\fR \fIFILE|PARAM\fR]
+[\fB\-g\fR \fILOG_LEVEL\fR]
+[\fB\-h\fR \fIHOST\fR]
+[\fB\-i\fR \fIID\fR
 [\fB\-n\fR \fINAME\fR]
+[\fB\-p\fR \fIPORT\fR]
+[\fB\-r\fR \fIRESERVED_IDS\fR]
 [\fB\-t\fR \fITYPE\fR]
 [\fB\-u\fR \fIUNIT\fR]
+[\fB\-x\fR \fICURRENT_NAME:NEW_NAME\fR]
 .SH DESCRIPTION
 .B rasctl
 Sends commands to the rascsi process to make configuration adjustments at runtime or to check the status of the devices.
@@ -43,6 +44,9 @@ Note: The command and type arguments are case insensitive. Only the first letter
 .BR \-C\fI " "\fIFILENAME:FILESIZE
 Create an image file in the default image folder with the specified name and size in bytes.
 .TP
+.BR \-D\fI
+Detach all devices.
+.TP
 .BR \-E\fI " " \fIFILENAME
 Display information on an image file.
 .TP
@@ -94,7 +98,7 @@ Display the rascsi server version.
 .BR \-V\fI " " \fI
 Display the rasctl version.
 .TP
-.BR \-D\fI " "\fIFILENAME
+.BR \-d\fI " "\fIFILENAME
 Delete an image file in the default image folder.
 .TP
 .BR \-x\fI " "\fICURRENT_NAME:NEW_NAME

doc/rasctl_man_page.txt

@@ -6,11 +6,11 @@ NAME
        rasctl - Sends management commands to the rascsi process
 
 SYNOPSIS
-       rasctl  -e | -l | -m | -s | -v | -I | -L | -O | -T | -V | [-E FILENAME]
-       [-F IMAGE_FOLDER] [-C FILENAME:FILESIZE] [-x CURRENT_NAME:NEW_NAME] [-R
-       CURRENT_NAME:NEW_NAME]  [-g  LOG_LEVEL]  [-h  HOST]  [-p  PORT] [-r RE‐
-       SERVED_IDS] [-i ID [-c CMD] [-f FILE|PARAM] [-n  NAME]  [-t  TYPE]  [-u
-       UNIT]
+       rasctl -e | -l | -m | -s | -v | -D | -I | -L | -O | -T | -V | [-C FILE‐
+       NAME:FILESIZE]   [-E   FILENAME]    [-F    IMAGE_FOLDER]    [-R    CUR‐
+       RENT_NAME:NEW_NAME]  [-c  CMD] [-f FILE|PARAM] [-g LOG_LEVEL] [-h HOST]
+       [-i ID [-n NAME] [-p PORT] [-r RESERVED_IDS] [-t TYPE]  [-u  UNIT]  [-x
+       CURRENT_NAME:NEW_NAME]
 
 DESCRIPTION
        rasctl  Sends  commands to the rascsi process to make configuration ad‐
@@ -28,6 +28,8 @@ OPTIONS
               Create an image file in the default image folder with the speci‐
               fied name and size in bytes.
 
+       -D     Detach all devices.
+
        -E FILENAME
               Display information on an image file.
 
@@ -75,7 +77,7 @@ OPTIONS
 
        -V     Display the rasctl version.
 
-       -D FILENAME
+       -d FILENAME
               Delete an image file in the default image folder.
 
        -x CURRENT_NAME:NEW_NAME

src/raspberrypi/devices/scsimo.cpp

@@ -63,12 +63,8 @@ void SCSIMO::Open(const Filepath& path)
 		SetBlockCount(size >> GetSectorSizeShiftCount());
 	}
 
-	// File size must be a multiple of the sector size
-	if (size % GetSectorSizeInBytes()) {
-		stringstream error;
-		error << "File size must be a multiple of " << GetSectorSizeInBytes() << " bytes but is " << size << " bytes";
-		throw io_exception(error.str());
-	}
+	// Effective size must be a multiple of the sector size
+	size = (size / GetSectorSizeInBytes()) * GetSectorSizeInBytes();
 
 	SetReadOnly(false);
 	SetProtectable(true);

src/raspberrypi/rascsi.cpp

@@ -1771,6 +1771,13 @@ static void *MonThread(void *param)
 	return NULL;
 }
 
+void TerminationHandler(int signum)
+{
+	DetachAll();
+
+	exit(signum);
+}
+
 //---------------------------------------------------------------------------
 //
 //	Main processing
@@ -1833,6 +1840,14 @@ int main(int argc, char* argv[])
 		return EPERM;
 	}
 
+	// Signal handler to detach all devices on a KILL or TERM signal
+	struct sigaction termination_handler;
+	termination_handler.sa_handler = TerminationHandler;
+	sigemptyset(&termination_handler.sa_mask);
+	termination_handler.sa_flags = 0;
+	sigaction(SIGINT, &termination_handler, NULL);
+	sigaction(SIGTERM, &termination_handler, NULL);
+
 	// Reset
 	Reset();
 

src/raspberrypi/rasctl.cpp

@@ -98,8 +98,8 @@ int main(int argc, char* argv[])
 		cerr << "version " << rascsi_get_version_string() << " (" << __DATE__ << ", " << __TIME__ << ")" << endl;
 		cerr << "Usage: " << argv[0] << " -i ID [-u UNIT] [-c CMD] [-C FILE] [-t TYPE] [-b BLOCK_SIZE] [-n NAME] [-f FILE|PARAM] ";
 		cerr << "[-F IMAGE_FOLDER] [-L LOG_LEVEL] [-h HOST] [-p PORT] [-r RESERVED_IDS] ";
-		cerr << "[-C FILENAME:FILESIZE] [-w FILENAME] [-R CURRENT_NAME:NEW_NAME] [-x CURRENT_NAME:NEW_NAME] ";
-		cerr << "[-e] [-E FILENAME] [-I] [-l] [-L] [-m] [-O] [-s] [-v] [-V] [-y]" << endl;
+		cerr << "[-C FILENAME:FILESIZE] [-d FILENAME] [-w FILENAME] [-R CURRENT_NAME:NEW_NAME] [-x CURRENT_NAME:NEW_NAME] ";
+		cerr << "[-e] [-E FILENAME] [-D] [-I] [-l] [-L] [-m] [-O] [-s] [-v] [-V] [-y]" << endl;
 		cerr << " where  ID := {0-7}" << endl;
 		cerr << "        UNIT := {0-31}, default is 0" << endl;
 		cerr << "        CMD := {attach|detach|insert|eject|protect|unprotect|show}" << endl;
@@ -135,7 +135,7 @@ int main(int argc, char* argv[])
 
 	opterr = 1;
 	int opt;
-	while ((opt = getopt(argc, argv, "elmsvINOTVa:b:c:f:h:i:n:p:r:t:u:x:C:D:E:F:L:R:")) != -1) {
+	while ((opt = getopt(argc, argv, "elmsvDINOTVa:b:c:d:f:h:i:n:p:r:t:u:x:C:E:F:L:R:")) != -1) {
 		switch (opt) {
 			case 'i': {
 				int id;
@@ -179,6 +179,15 @@ int main(int argc, char* argv[])
 				}
 				break;
 
+			case 'D':
+				command.set_operation(DETACH_ALL);
+				break;
+
+			case 'd':
+				command.set_operation(DELETE_IMAGE);
+				image_params = optarg;
+				break;
+
 			case 'E':
 				command.set_operation(IMAGE_FILE_INFO);
 				filename = optarg;
@@ -301,11 +310,6 @@ int main(int argc, char* argv[])
 			case 'T':
 				command.set_operation(DEVICE_TYPES_INFO);
 				break;
-
-			case 'D':
-				command.set_operation(DELETE_IMAGE);
-				image_params = optarg;
-				break;
 		}
 	}