JP4946919B2 - Information processing device - Google Patents

Description

  The present invention relates to an information processing apparatus capable of avoiding at least a part of functions from becoming inoperable by reading a program from a USB storage device in an emergency in which the program cannot be read from an IDE storage device.

Conventionally, an information processing apparatus configured to read a program from an external storage device and execute predetermined processing has already been proposed (see, for example, Patent Document 1).
In the technique described in Patent Document 1, a USB storage device is externally attached, a program is read from the USB storage device, and the apparatus is activated.
JP 2006-331380 A

  By the way, the booting technology from the USB storage device as described above can be combined with the booting technology from the built-in hard disk device in addition to using it alone. For example, when the startup from the internal hard disk device (hereinafter referred to as normal startup) fails, the configuration is such that startup from the USB storage device (hereinafter referred to as emergency startup) is performed. The reliability of the apparatus can also be improved.

  When such a mechanism is configured, in order to use a file on the USB storage device during an emergency startup, the drive name assigned to the USB storage device is specified, and the path name using the drive name is used. You need access to the file system and files you want.

  However, when there are a plurality of USB storage devices, the order of recognizing the plurality of devices is often left to the OS (Operating System) of the information processing apparatus, and the drive names are switched depending on the recognition order. Sometimes. In particular, in the case of a USB storage device that can be easily inserted and removed, there is a high possibility that the information is added to or deleted from the information processing apparatus, and the drive name is likely to change accordingly.

  Therefore, even if you decide the drive name assigned to the USB storage device and specify the file system and file that you want to access in the emergency start with the path name using it, the drive name will fluctuate, The file system or file could not be accessed.

  If there is a second USB storage device having a file configuration equivalent to that of the first USB storage device, the second storage device is mistaken for the first USB storage device, and the file on the second storage device is There is also a risk of accessing.

  In this case, if the second storage device is prepared with malicious intent, there may be a problem that an inappropriate program is read from the second storage device.

  By the way, a specific USB port is used as the above-mentioned emergency startup dedicated USB port, and a USB storage device dedicated to emergency startup is attached to it, so that the emergency startup dedicated USB device is physically connected to other USB devices. It can be handled separately.

  However, even if such a physical distinction is made, when accessing a file system or file, the drive name assigned by the OS is used as described above. For this reason, after the drive name is assigned, there is a problem if it is not known which USB device the drive name is assigned to, but depending on the OS, the USB port corresponding to the drive name is based on the drive name. And USB devices could not be checked.

  The present invention has been made to solve the above-described problem, and its purpose is to perform emergency startup from an appropriate USB storage device even if the drive name assigned to the USB storage device for emergency startup fluctuates. An object of the present invention is to provide an information processing apparatus capable of performing the above.

Hereinafter, the configuration employed in the present invention will be described.
The information processing apparatus according to claim 1 includes an IDE storage device that functions as a hard disk drive connected by an IDE method, and a plurality of USB ports to which a USB storage device can be connected. Among the information processing apparatuses, at least one USB port is an administrator USB port that can be used only by an administrator, and the remaining USB ports are general USB ports that can be used by non-administrators. When a processing apparatus is started up, if the IDE storage device and a USB storage device connected to the USB port are detected, a drive name assignment for assigning a unique drive name to each of the detected IDE storage device or USB storage device Means and before Using the drive name assigned to the IDE storage device by the drive name assigning means, the first file system on the IDE storage device is specified, and the specified first file system is set to a predetermined value. First mounting means for mounting at a mount point; determination means for determining whether or not the first mounting means has successfully mounted the first file system; and mounting of the first file system by the determination means has failed A drive name acquiring means for acquiring the drive name assigned by the drive name assigning means to the USB storage device connected to the administrator USB port, and a drive name acquiring means. The drive name obtained by A second mount unit that identifies a second file system on the USB storage device connected to the administrator USB port and mounts the identified second file system on the mount point; When the first file system or the second file system is mounted on the mount point by either the first mount unit or the second mount unit, the program is read from the file group under the mount point, And a process execution means for executing a process based on the program.

  In this information processing apparatus, the IDE storage device functions as a hard disk drive connected by the IDE method. In more detail, in the present invention, the IDE method is used as a connection method viewed from the control unit side of the information processing apparatus, and the control unit side of the information processing apparatus recognizes the device type as a hard disk device. Is referred to as an IDE storage device.

  The most representative example of such an IDE storage device is a hard disk device incorporating a connection interface of the IDE method (parallel ATA (Advanced Technology Attachment) method).

  Further, even when the hard disk device itself has a built-in interface of another method different from the IDE method, a hard disk device that can be connected by the IDE method by adding an adapter that can convert the other method into the IDE method. Can be configured. That is, such a hard disk device with a conversion adapter is also included in the IDE storage device in the present invention.

  In the case of a hard disk device, representative examples of other systems different from the IDE system as described above include, for example, the SCSI system, the SATA (Serial Advanced Technology Attachment) system, and the like. Alternatively, an interface of a USB system or an IEEE (Institute of Electrical and Electronic Engineers) 1394 system may be used. Any type of interface may be converted to the IDE method.

  Furthermore, as long as it is a device that emulates a behavior equivalent to that of a hard disk drive connected by the IDE method as seen from the control unit side of the information processing apparatus, a structure different from that of the hard disk apparatus may be adopted structurally. Included in the IDE storage device in the present invention. For example, a storage device configured using various storage media different from the hard disk device, such as a storage device using a semiconductor memory, may be used.

  On the other hand, in this information processing apparatus, a USB storage device is recognized as a USB mass storage class device from the control unit side of the information processing apparatus when connected to a USB port.

  As for this USB storage device, as long as the USB method is used as a connection method viewed from the control unit side of the information processing apparatus, it does not matter whether or not the conversion adapter as described above is used on the device side. .

  In the information processing apparatus configured as described above, when the information processing apparatus is activated, first, the drive name assigning unit detects the IDE storage device and the USB storage device, and assigns a unique drive name to each.

  For example, when the OS of the information processing apparatus is Linux (registered trademark), the information processing apparatus assigns a drive name such as hda, hdb, hdc,. assign. Also, drive names such as sda, sdb, sdc,... Are assigned to USB storage devices. These drive name assignment processes are executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this corresponds to drive name assignment means in the present invention.

  When the drive name is assigned by such drive name assigning means, the first mount means uses the drive name assigned to the IDE storage device to change the first file system on the IDE storage device. Identify. Then, the identified first file system is mounted at a predetermined mount point.

  For example, when the OS of the information processing apparatus is Linux (registered trademark), the file system names on the IDE storage device to which the drive name “hda” is assigned are hda1, hda2, and hda3. , ... is decided.

  Therefore, in the information processing apparatus, when the file system existing on the IDE storage device is prepared as designed, the first file system (for example, “hda1”) is used by using the drive name (for example, “hda”). It can be specified). If the first file system can be specified, the first file system (for example, “hda1”) can be mounted on a predetermined mount point (for example, “/ main”). Such a mounting process is also executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this is a configuration corresponding to the first mounting means in the present invention.

  Subsequently, the information processing apparatus executes processing for determining whether or not the first file system has been successfully mounted. This determination processing is also executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this is a configuration corresponding to the determination means in the present invention.

  As a result of this determination, if it is determined that the mounting is successful, the control unit of the information processing apparatus is in a state where it can access the file group on the first file system under the mount point.

  Therefore, when the first file system is mounted on the mount point by the first mount unit, the control unit of the information processing apparatus reads a program from the file group under the mount point and executes processing based on the program. This processing is also executed by a control unit centering on the CPU or the like provided in the information processing apparatus, and this corresponds to the processing execution means in the present invention.

  Now, the behavior of the information processing apparatus as described above is the behavior when there is no problem with the IDE storage device. However, when there is a problem with the IDE storage device, mounting of the first file system by the first mounting means fails. There is a case. In this case, the program cannot be read from the file group under the mount point, and the information processing apparatus cannot execute processing based on the program.

  Therefore, in the information processing apparatus of the present invention, when the determination unit determines that the mounting has failed, the following processing is performed. That is, first, the drive name acquisition unit acquires the drive name assigned by the drive name assignment unit to the USB storage device connected to the administrator USB port.

  The reason why such drive name acquisition means is adopted is that it is uncertain what drive name the drive name assignment means assigns to the USB storage device connected to the administrator USB port.

  This will also be described with a specific example. For example, when the OS of the information processing apparatus is Linux (registered trademark), a drive such as sda, sdb, sdc,... A name is assigned.

  Here, in the information processing apparatus of the present invention, a USB storage device is connected to the administrator USB port, and a second file system is prepared on the USB storage device. Therefore, only when there is no other USB storage device, for example, the drive name of the USB storage device connected to the administrator USB port is determined as “sda”. Therefore, for example, when the first file system is the target, the second file system should be “sda1”, and the second file system can be specified.

  However, when a USB storage device is also connected to the general USB port, which of the above drive names such as sda, sdb, sdc,... Is connected to the USB storage device connected to the administrator USB port. It is undefined whether it will be assigned. Of course, it is undefined which is assigned to the USB storage device connected to the general USB port.

  Therefore, in the information processing apparatus of the present invention, when the determination unit determines that the mounting has failed, first, the drive name assigned by the drive name assignment unit to the USB storage device connected to the administrator USB port is set. The acquisition process is executed. This process is also executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this corresponds to a drive name acquisition unit in the present invention.

  If the drive name “sda” of the USB storage device connected to the administrator USB port can be acquired by such a drive name acquisition unit, for example, when the first file system is the target, the second file system is “sda1”. Can be identified. If the drive name “sdb” can be acquired, for example, if the first file system is the target, the second file system can be specified as “sdb1”.

  Therefore, the information processing apparatus can execute a process of mounting the second file system (for example, “sda1”) specified as described above on a predetermined mount point (for example, “/ main”). Such a mounting process is also executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this corresponds to the second mounting means in the present invention.

  Then, when the second file system is mounted on the mount point by the second mount unit, the control unit of the information processing apparatus reads a program from the file group under the mount point and executes processing based on the program. This process is equivalent to the process when the first file system is mounted, and corresponds to the process execution means referred to in the present invention as described above.

  According to the information processing apparatus as described above, normally, various processes can be started from the first file system. On the other hand, if the first file system mount fails due to some cause (for example, a failure or the like), an alternative process for emergency can be activated from the second file system.

  In addition, when there are a plurality of USB storage devices, their drive names are undefined, but in the present invention, the drive assigned to the USB storage device connected to the administrator USB port by the drive name acquisition means. You can get the name. In addition, the second mount unit can appropriately identify the second file system on the USB storage device connected to the administrator USB port by using the drive name acquired by the drive name acquisition unit. .

  Therefore, the second mount unit can mount an appropriate second file system at a predetermined mount point, and erroneously mounts the file system on the USB storage device connected to other than the administrator USB port. There is nothing.

  Therefore, after the appropriate second file system is mounted, the process execution means can read the program from the file group under the mount point and execute the process based on the program. Therefore, it is possible to prevent troubles such as a necessary file not being read or an inappropriate file being read.

Although the information processing apparatus of the present invention has been described above, the information processing apparatus of the present invention may be further configured as follows.
First, an information processing apparatus according to claim 2 is a virtual SCSI interface used when accessing the USB storage device when the USB storage device is detected in the information processing apparatus according to claim 1. An interface generation unit that generates, for each USB storage device, an information disclosure interface for accessing information related to the SCSI interface and the USB storage device, and the drive name allocation unit is generated by the interface generation unit Each time the detected SCSI interface is detected, the drive name is assigned to the USB storage device accessible via the SCSI interface, and the SCSI interface is assigned. When accessing the USB storage device via the interface, the drive name assigned to the USB storage device to be accessed is transmitted to the SCSI interface, whereby the storage area provided in the SCSI interface The drive name is stored in the storage area of the SCSI interface via the information disclosure interface, and the administrator USB port is read from the read information. And information indicating the correspondence between the drive name and the drive name.

  According to the information processing apparatus configured as described above, when the USB storage device is accessed via the virtual SCSI interface (SCSI host adapter), the drive name assigned to the USB storage device is included in the SCSI interface. Saved in the storage area.

  Therefore, when the drive name acquisition unit acquires information via the information disclosure interface, it is possible to acquire drive name information in addition to information related to the SCSI interface and the USB storage device. Thereby, it is possible to easily grasp the correspondence between the administrator USB port and the drive name.

  For example, when the OS of the information processing apparatus is Linux (registered trademark), when a USB storage device is detected, a virtual SCSI interface used when accessing the USB storage device is described. Is generated. In addition, an information disclosure interface (a pseudo file under the / proc file system) for accessing information related to the SCSI interface and the USB storage device is generated. The process of generating these is executed for each USB storage device. These processes are executed by a control unit centered on a CPU or the like provided in the information processing apparatus, and this corresponds to the interface generation means in the present invention.

  The drive name assigning unit described above executes a process of assigning a drive name to a USB storage device accessible via the SCSI interface every time a virtual SCSI interface is detected.

  However, in the case of general Linux (registered trademark), when accessing a USB storage device via the SCSI interface, the drive name assigned to the USB storage device to be accessed is transmitted to the SCSI interface. Absent. Therefore, the drive name is not saved in the storage area provided in the SCSI interface.

  Therefore, in the case of general Linux (registered trademark), the SCSI interface corresponding to the drive name can be specified, but the corresponding drive name cannot be specified based on the SCSI interface. Yes. In the case of a general Linux (registered trademark), the drive name (for example, “sda”) of the USB storage device corresponding to the administrator USB port according to the present invention cannot be specified based on the SCSI interface. It means that it is a specification.

  In this regard, in the case of the present invention, as described above, when accessing the USB storage device via the SCSI interface, the drive name assigned to the USB storage device to be accessed is stored in the storage area provided in the SCSI interface. Is done.

  Therefore, the drive name saved in the storage area is read from the storage area provided in the SCSI interface corresponding to the administrator USB port, and the intended drive name or file system name is specified based on the drive name. It can be done.

  Incidentally, in the case of a general SCSI interface, a plurality of storage devices may be connected to a single SCSI interface. For this reason, even if the drive name is stored in the storage area of the SCSI interface as described above, the one-to-one relationship between the SCSI interface and the storage device cannot be specified.

  However, the virtual SCSI interface generated when the USB storage device is connected has a one-to-one relationship between the SCSI interface and the USB storage device. Therefore, if the drive name is stored in the storage area of the SCSI interface as described above, it can be specified that the drive name is assigned to the “USB storage device having a one-to-one relationship”.

  Next, the information processing apparatus according to claim 3 is the information processing apparatus according to claim 2, wherein the drive name assigning unit assigns the drive name to the USB storage device, and In order to obtain information on the capacity of the device, a read capacity command, which is one type of SCSI command defined by the SCSI standard, is issued. In the processing corresponding to the read capacity command, the drive name is It is transmitted to the SCSI interface.

  In this information processing apparatus, acquisition of information related to the capacity of a USB storage device is an essential process after device recognition. In the case of a USB storage device that conforms to the SCSI standard, a read capacity command is always issued. The

  Therefore, if the drive name is transmitted to the SCSI interface in the process executed when the read capacity command is issued, for example, a dedicated command for transmitting the drive name to the SCSI interface is newly provided. You don't have to. In addition, with respect to the existing processing that has issued the read capacity command, a new function is added only by issuing the read capacity command without any modification.

  Furthermore, the information processing apparatus according to claim 4 is the information processing apparatus according to claim 2 or 3, wherein the drive name acquisition unit is capable of acquiring information via the information disclosure interface. For the USB storage device, reading information is sequentially repeated, and it is determined whether or not the information related to the USB port included in the read information corresponds to the predetermined USB port for the administrator. If the information corresponds to the USB port for use, the drive name included in the read information is acquired.

  According to the information processing apparatus configured as described above, even when there are a plurality of USB storage devices, it is possible to select the drive name corresponding to the administrator USB port while reading the information as processing targets in order. it can.

  In addition, the information processing device according to claim 5 is the information processing device according to any one of claims 1 to 4, wherein the administrator USB port is housed inside a housing of the information processing device. The USB device can be inserted / removed when the panel of the casing is opened, and the general USB port is exposed to the outside of the casing, so that the panel is not opened. However, the USB device can be inserted and removed.

  According to the information processing apparatus configured as described above, the administrator USB port is in a place where the USB device cannot be inserted or removed unless the panel is opened. It is possible to prevent the USB device from being attached to the computer.

Next, an embodiment of the present invention will be described with an example.
[Internal structure of information processing device]
FIG. 1 is a block diagram showing an internal structure of an information processing apparatus 1 exemplified as an embodiment of the present invention.

  The information processing device 1 described below is a device dedicated to a specific function that is configured so that a specific function included in the information processing device 1 is operated by automatically executing a predetermined program group after the power is turned on. is there. More specifically, in the case of the present embodiment, the information processing apparatus 1 is configured as a karaoke commander, and various functions are operated as a karaoke commander by automatically executing a predetermined program group after the power is turned on. Is configured to do. In this respect, the program to be executed is different from a general-purpose device such as a personal computer in which a program to be executed can be arbitrarily changed according to a user's operation.

  The information processing apparatus 1 includes a CPU 11, a ROM 13, a RAM 15, a hard disk device 17, a USB interface 20, and the like. The USB interface 20 includes one internal USB port 21 and two external USB ports 22 and 23, and a USB storage device 25 is connected to the internal USB port 21. That is, the information processing apparatus 1 includes the hard disk device 17 and the USB storage device 25, and these two types of storage devices.

  Among these, the hard disk device 17 is connected via an IDE built-in interface, and when the information processing apparatus 1 is started, the program stored in the hard disk device 17 is normally read. Further, as will be described in detail later, when the program cannot be read from the hard disk device 17, the program stored in the USB storage device 25 is read as an alternative. That is, the hard disk device 17 is used during normal startup, and the USB storage device 25 is used in an emergency where normal startup is not possible.

  Further, the information processing apparatus 1 includes a housing 31, and the CPU 11, ROM 13, RAM 15, hard disk device 17, and the like are housed inside the housing 31. Of the USB interface 20, the internal USB port 21 is housed inside the housing 31, while the external USB ports 22 and 23 are exposed to the outside of the housing 31.

  The housing 31 is provided with an opening 33, and the opening 33 is closed by a panel 35. The panel 35 is fixed to the housing 31 by a fixing tool 37, and the fixing tool 37 has a structure that can be removed only when a dedicated jig (not shown) is used.

  Only the administrator who has the dedicated jig can remove the fixture 37 and open the panel 35, and only the administrator can directly touch the device built in the housing 31. Therefore, only the administrator can perform insertion / removal of the USB storage device 25 connected to the internal USB port 21. On the other hand, the external USB ports 22 and 23 are exposed to the outside of the housing 31 as described above, and various USB devices can be arbitrarily inserted and removed even by general users other than the administrator.

  That is, the internal USB port 21 is an administrator USB port that can be used only by an administrator, and the external USB ports 22 and 23 are general USB ports that can be used by non-administrators. .

  Furthermore, in order to control these hardware, the information processing apparatus 1 is equipped with an OS. In this embodiment, Linux (registered trademark) is installed as the OS. However, since only functions provided in general Linux (registered trademark) do not have sufficient functions necessary for carrying out the present invention, some unique functions are added. The specific contents of this additional function will be described in detail later, but descriptions of other functions that are not different from general Linux (registered trademark) will be omitted.

[Processes executed when the information processing device starts]
Next, processing executed when the information processing apparatus 1 is activated will be described.
FIG. 2 is a flowchart of processing executed when the information processing apparatus 1 is turned on.

  When the information processing apparatus 1 is turned on, the information processing apparatus 1 first loads the OS kernel into the memory of the CPU 11 (S105). The OS kernel is stored in the ROM 13, and in S105, the CPU 11 secures a part of the RAM 15 as a RAM disk and loads the kernel onto the RAM disk. As a result, the RAM disk becomes a root volume, the OS is started, and at least some of the functions of the OS start to operate.

  When at least a part of the OS starts to function in this manner, the information processing apparatus 1 recognizes the hard disk device 17 connected by the IDE method (S110). In S110, a drive name is assigned to the hard disk device 17, and in the present embodiment, the drive name of the hard disk device 17 is “hda”.

  Subsequently, the information processing apparatus 1 starts SCSI drive connection monitoring (S115). In the present embodiment, in S115, the SCSI drive connection monitoring process is started. Thereafter, the process stays resident until the information processing apparatus 1 is turned off. Connect / disconnect is monitored.

The details of the SCSI drive connection monitoring process are as shown in FIG.
That is, when “intra-OS SCSI drive connection monitoring” shown in FIG. 3 is started, the information processing apparatus 1 first initializes the “SCSI-I / F connection table (hereinafter referred to as SITB)” (S205). ). The SITB is a table for registering a SCSI interface (hereinafter referred to as SCSI-I / F) that is currently connected in the information processing apparatus 1. In S205, for example, when there is a SCSI-I / F mounted as hardware, processing for registering the information in the SITB is executed.

  If there is a drive connected to the I / F registered in S205, the drive is registered in the system (S210). By this S210, drive names such as “sda”, “sdb”,... Are assigned to the registered drives.

  Subsequently, the information processing apparatus 1 determines whether or not a certain time (for example, 6 seconds) has elapsed (S215). If it has not elapsed (S215: No), the process returns to S215, and the time elapses. wait. When a certain time has elapsed (S215: Yes), the currently connected SCSI-I / F is confirmed (S220).

  Thereafter, the information processing apparatus 1 determines whether or not there is a newly connected SCSI-I / F (S225). If there is no newly connected SCSI-I / F (S225: none), the currently disconnected SCSI-I The presence / absence of I / F is determined (S230). If there is no SCSI-I / F disconnected this time (S230: No), the process returns to S215. As a result, S215 to S230 are repeatedly executed approximately every 6 seconds.

  Then, when such a repetitive process of S215 to S230 is executed, if there is a newly connected SCSI-I / F (S225: present), the information processing apparatus 1 determines that the new SCSI-I / F Is registered in the above-mentioned SITB, and the drive connected to the I / F is registered in the system (S235).

  By this S235, drive names such as “sda”, “sdb”,... Are assigned to the registered drives. Further, since information on the capacity of the drive is also required at the time of registering the drive, a read capacity command, which is one type of SCSI command defined by the SCSI standard, is issued in order to acquire the information.

  At this time, in the information processing apparatus 1, the drive name for which the read capacity command is issued is stored in a storage area prepared for each SCSI-I / F. Such a process is a special process that is not performed in general Linux (registered trademark), and is a process unique to the information processing apparatus 1.

  Incidentally, when a plurality of SCSI drives are connected to one SCSI-I / F, the above-described read capacity command is sequentially issued to the plurality of SCSI drives. For this reason, the drive name for which the read capacity command is issued also changes in order, so that the drive for which the last read capacity command is issued is stored in the storage area prepared for each SCSI-I / F. The name will be stored.

  However, if one SCSI drive is connected to one SCSI-I / F, the above-described read capacity command is issued only to one SCSI drive. Therefore, the drive name for which the read capacity command is issued does not change, and the drive name connected to the SCSI-I / F is stored in the storage area prepared for each SCSI-I / F. It will be.

  When S235 is completed, the information processing apparatus 1 determines whether or not the processing of all the SCSI-I / Fs connected this time has been completed (S240), and if not completed (S240: No, the next I / F F)), returning to S235, S235 is repeated for the remaining SCSI-I / F. When all SCSI-I / F processes connected this time are completed (S240: Yes), the process proceeds to S230.

  In addition, when the SCSI-I / F that is disconnected this time is present while the repetition processing of S215 to S230 is performed (S230: Yes), the information processing apparatus 1 transmits the disconnected SCSI-I / F from SITB. The drive connected to the I / F is deleted from the system (S245). By this S245, the drive name corresponding to the deleted drive disappears from the system.

  Then, the information processing apparatus 1 determines whether or not the processing of all the SCSI-I / Fs that have been disconnected this time has ended (S250), and if it has not ended (S250: No to the next I / F), S245 By returning to step S245, S245 is repeated for the remaining SCSI-I / F. When the processing of all the SCSI-I / Fs disconnected this time is completed (S240: Yes), the process returns to S215.

  Now, the process as described above is a process started by S115, but here, returning to FIG. 2 again, the description from the point of time when S115 is completed will be continued. When S115 ends, the information processing apparatus 1 starts USB connection monitoring (S120). In the case of this embodiment, in this S120, the USB connection monitoring process is started, and after that, the process stays resident until the information processing apparatus 1 is turned off. Connect / disconnect is monitored.

The details of the USB connection monitoring process are as shown in FIG.
That is, when “in-OS USB connection monitoring” shown in FIG. 3 is started, the information processing apparatus 1 first initializes a “USB device connection table (hereinafter referred to as UDTB)” (S305). The UDTB is a table for registering the currently connected USB device in the information processing apparatus 1. In S305, the USB device is handled as being in a state where nothing is connected.

  Subsequently, the information processing apparatus 1 determines whether or not a certain time (for example, 100 milliseconds) has elapsed (S315). If it has not elapsed (S315: No), the process returns to S315, and the time has elapsed. Wait for. When a certain time has elapsed (S315: Yes), the currently connected USB device is confirmed (S320).

  Thereafter, the information processing apparatus 1 determines whether or not there is a newly connected USB device (S325), and if there is no newly connected USB device (S325: no), determines whether or not there is a USB device that has been disconnected this time. (S330). If there is no USB device disconnected this time (S330: No), the process returns to S315. As a result, S315 to S330 are repeatedly executed approximately every 6 seconds.

  Then, when such a repetitive process of S315 to S330 is executed, if there is a newly connected USB device (S325: present), the information processing apparatus 1 registers the new USB device in the UDTB described above. The device driver is registered in the system (S335). This S335 is a process as shown in detail in FIG.

  That is, as shown in FIG. 5, the information processing apparatus 1 first determines the type of the USB device (S405). If it is determined that the device is a USB storage class device (S405: USB storage class), a virtual SCSI-I / F (virtual SCSI host adapter) is registered in the system and a symbol of “SCSIm” is given from the system. (S410). Note that “m” in the “SCSIm” is a serial number from “0”, and is a number that is reused after disconnection.

  Further, the information processing apparatus 1 receives the information disclosure unit in “/ proc / scsi / usb-storage” as a system registration and is given the symbol “/ proc / scsi / usb-storage / n” from the system (S415). Note that “n” in the above “/ proc / scsi / usb-storage / n” is a serial number from “0”, which is a number that is not reused after cutting.

  On the other hand, if it is determined in S405 that the device is a device other than the USB storage class (S405: other than the USB storage class), the information processing apparatus 1 performs a registration process for each USB device (S420). The process of S420 can be divided into several processes depending on the type of the USB device, but the details of this process are not the main part of the present invention, and thus further explanation is omitted.

  When the processing of S405 to S420 as described above (see FIG. 5) is finished, S335 shown in FIG. 4 is finished. In this case, the information processing apparatus 1 performs processing for all the USB devices connected this time. It is determined whether or not the processing has been completed (S340).

  Here, if the processing of all the USB devices connected this time has not been completed (S340: No, to the next I / F), the process returns to S335, and S335 is repeated for the remaining USB devices. When the processing of all the USB devices connected this time is completed (S340: Yes), the process proceeds to S330.

  Further, when the USB device disconnected this time is present (S330: Yes) while the repetitive processing of S315 to S330 is performed, the information processing apparatus 1 deletes the disconnected USB device from the UDTB, and the I / O The drive connected to F is deleted from the system (S345). This S345 is a process as shown in detail in FIG.

  That is, as shown in FIG. 6, the information processing apparatus 1 first determines the type of the USB device (S505). If it is determined that the device is a USB storage class device (S505: USB storage class), the information disclosing means of “/ proc / scsi / usb-storage / n” is deleted from the system (S510). As already explained, this number “n” is never reused.

  Also, the virtual SCSI-I / F (virtual SCSI host adapter) of “SCSIm” is deleted from the system (S515). As already described, the number “m” may be reused as necessary.

  On the other hand, if it is determined in S505 that the device is a device other than the USB storage class (S505: other than the USB storage class), the information processing apparatus 1 performs a deletion process for each USB device (S520). The process of S520 is divided into several processes depending on the type of the USB device, but the details of this process are not the main part of the present invention, and thus further explanation is omitted.

  When the processes of S505 to S520 as described above (see FIG. 6) are finished, S345 shown in FIG. 4 is finished. In this case, the information processing apparatus 1 performs the process for all the USB devices that have been disconnected this time. It is determined whether or not the processing has been completed (S350). Here, if the processing of all the USB devices disconnected this time has not been completed (S350: No, to the next I / F), the process returns to S345, and S345 is repeated for the remaining USB devices. When the processing of all the USB devices disconnected this time is completed (S340: Yes), the process returns to S315.

  Now, the process as described above is a process started by S120. Here, it returns to FIG. 2 again, and the description from the time when S120 is finished is continued. When S120 ends, the information processing apparatus 1 recognizes all connected USB devices when the power is turned on (S125). This recognition is performed because the USB connection monitoring process is started in S120.

  If there is a USB storage device among the recognized USB devices, the drive existing therein is recognized as a SCSI drive (S130). Such recognition is performed because the SCSI drive connection monitoring process is started in S115.

  Subsequently, in the information processing apparatus 1, the initialization of the kernel is terminated, and the first script is executed (S135). Then, mount processing of the volume used in the main is executed (S140).

  This S140 is a process as shown in detail in FIG. That is, when the processing shown in FIG. 7 is started, the information processing apparatus 1 mounts the file system “/ dev / hda1” on a predetermined mount point “/ main” (S605). Here, the drive name “hda” and the file system name “hda1” are predetermined matters in the configuration of the information processing apparatus 1.

  When S605 is completed, it is determined whether or not the mounting is successful (S610). If the mounting is successful (S610: success), the script “/main/prog/startup.sh” in the mounted volume is executed (S615).

  On the other hand, if mounting fails in S610 (S610: success), the script “/main/prog/startup.sh” cannot be executed as it is, and the information processing apparatus 1 cannot be started normally.

  Therefore, in this case, the SCSI drive name is determined from the backup operation USB port (S620). This S620 is a process as shown in detail in FIG. That is, when the processing shown in FIG. 8 is started, the information processing apparatus 1 first searches for a file under “/ proc / scsi / usb-storage” (S705).

  Then, it is determined whether there is a file (S710). If there is a file (S710: Yes), the found file is read (S715). Here, the read target file “/ proc / scsi / usb-storage / n” is an information disclosing means for providing information on the USB storage device and the USB port.

  In S715, by reading the file, it is possible to acquire USB port information, USB storage device information, and the like. Also, such USB port information and USB storage device information are information that can be obtained by general Linux (registered trademark), but in this information processing apparatus 1, in S715, the information was assigned to the USB storage device. You can also get the drive name.

  This drive name is the drive name itself stored in the storage area prepared for each SCSI-I / F by the processing of S235. In the case of general Linux (registered trademark), when the SCSI-I / F is used, the drive name is not notified to the SCSI-I / F, so the SCSI drive connected to the SCSI-I / F is not used. However, there is no way for the SCSI-I / F side to know what drive name is assigned.

  However, in this information processing apparatus 1, as described above, every time a read capacity command is issued, the drive name to which the command is issued is transmitted to the SCSI-I / F side, and the drive name is the SCSI name. -It remains in the storage area on the I / F side.

  Therefore, by looking at the information remaining in this storage area, the SCSI-I / F side can know what drive name is assigned to the SCSI drive connected to the SCSI-I / F. it can.

  When a plurality of SCSI drives are connected to the SCSI-I / F, only the name assigned to one of the SCSI drives is left in the storage area on the SCSI-I / F side. However, in the case of a USB storage device, one virtual SCSI-I / F is generated for one USB storage device. Therefore, since only one drive name is always left in the storage area corresponding to the SCSI-I / F, the drive name assigned to the USB storage device can be specified without any problem.

  That is, by looking at the information acquired in S715, it is possible to specify which USB port the information corresponds to, as in general Linux (registered trademark). In addition, unlike general Linux (registered trademark), it is possible to specify what drive name the information corresponds to.

  Therefore, after completing S715, the information processing apparatus 1 first determines the connection port (S720), and checks whether the information corresponds to the internal USB port 21 or not. If the information does not correspond to the internal USB port 21 (S720: USB port is different), the process returns to S710. Incidentally, the process returns to S710 in this way when the USB storage device is connected to either of the external USB ports 22 and 23.

  On the other hand, if it is information corresponding to the internal USB port 21 in S720 (S720: USB port searched for), the name of the drive that executed the read capacity last is acquired (S725). That is, the drive name is extracted from the information read in S715.

  This drive name is a drive name such as “sda”, “sdb”,..., But there is no guarantee what the letters “a”, “b”,. Specifically, when the USB storage device 25 is connected to the internal USB port 21 and the USB storage device is also connected to the external USB ports 22 and 23, the drive name “sda” is included in the previously recognized device. Is granted. Further, the drive name “sdb” is given to the device recognized thereafter. However, since it is undefined which device is recognized first, for example, it is undefined whether the device to which the drive name “sda” is assigned is the USB storage device 25.

  In this regard, if the information corresponding to the internal USB port 21 is searched for in S710 to S720, and the drive name is extracted in S725, the drive name assigned to the USB storage device 25 connected to the internal USB port 21 is surely determined. You can get it.

  If there is no file to be read before the intended USB port is found in S710 (S710: No), the processing shown in FIG. 8 is terminated. This corresponds to processing when the USB storage device 25 is not connected to the internal USB port 21.

  When the process described above is completed, the process of S620 illustrated in FIG. 7 is completed. In this case, the information processing apparatus 1 sets the file system “/ dev / sdx1” to a predetermined value. Mount on the mount point “/ main” (S625). Here, “sdx” is the drive name acquired in S725. That is, a partition (file system) on the SCSI drive is specified using the drive name of the SCSI drive determined in the processing up to S725, and the partition is mounted at “/ main”.

  When S625 is completed, it is determined whether or not the mounting is successful (S630). If the mounting is successful (S630: success), the process proceeds to S615 already described, and the script “/ “main / prog / startup.sh” is executed (S615). If the mounting has failed (S630: failure), the processing shown in FIG. 7 ends.

  When the processing as described above is completed, S140 shown in FIG. 2 is completed. Subsequently, in the information processing apparatus 1, the startup program in the main volume used is activated (S145). That is, whether “hda1” or “sdx1” is mounted on “/ main” depends on the situation, but in any case, the startup program in any volume is started.

  In the information processing apparatus 1, the system operates as a dedicated device (S150), and thereafter, the operation as the dedicated device is continued until a shutdown instruction is received from the user (S155: No). On the other hand, if there is a shutdown instruction from the user (S155: Yes), a shutdown process is executed (S160), and the power is turned off.

[effect]
According to the information processing apparatus 1 described above, first, the means for executing S605 (first mount means) sets the file system (first file system) of “/ dev / hda1” to “/ main” (predetermined mount). If it can be mounted, the means for executing S615 and S145 (processing execution means) reads the program from the file group under the mount point, and executes processing based on the program.

  On the other hand, when the mounting of the file system “/ dev / hda1” has failed, the means for executing S625 (second mounting means) changes the file system (second file system) of “/ dev / sdx1” to “/ After mounting at “main” (predetermined mount point) and mounting, the means for executing S615 and S145 (processing execution means) reads the program from the file group under the mount point and executes the processing based on the program To do.

  Therefore, normally, when various processes are started from the file system (first file system) of “/ dev / hda1”, when mounting of “/ dev / hda1” fails due to some cause (for example, failure). , An alternative process for emergency can be started from the file system (second file system) of “/ dev / sdx1”.

  Also, when two or more USB storage devices are connected to a plurality of USB ports, what drive name is assigned to the plurality of USB storage devices by the means (drive name assigning means) that executes S235? Is undefined. Therefore, the drive name assigned to the USB storage device 25 connected to the internal USB port 21 (manager USB port) is also undefined.

  However, the means for executing S620 (drive name acquisition means) acquires the drive name assigned to the USB storage device 25 connected to the internal USB port 21. Therefore, the means for executing S625 (second mount means) can appropriately specify the file system on the USB storage device 25 using the drive name acquired in S620.

  Therefore, in S625, an appropriate file system can be mounted at “/ main”, and the file system on the USB storage device connected to one of the external USB ports 22 and 23 cannot be mounted by mistake. Absent.

  Therefore, after the appropriate file system is mounted, in S615 and S145, the program can be read from the file group under the mount point, and appropriate processing based on the program can be executed.

  Furthermore, in the information processing apparatus 1, when accessing the USB storage device via the SCSI interface in S235, the drive name assigned to the USB storage device is stored in a storage area provided in the SCSI interface.

  Therefore, in S625, when information is acquired via the information disclosure means (information disclosure interface) of “/ proc / scsi / usb-storage / n”, in addition to information regarding the SCSI interface and the USB storage device, information on the drive name Can also get. Therefore, unlike general Linux (registered trademark), the drive name information corresponding to the USB port can be obtained very easily.

  In addition, the process of saving such drive name information in the storage area of the SCSI interface is executed in the process corresponding to the read capacity command, so that a higher-level program that issues the read capacity command must be handled. You can introduce a mechanism to leave the drive name in the storage area without adding it. Therefore, it is not necessary to newly provide a dedicated command for transmitting the drive name to the SCSI interface, and no major program modification is required.

  In addition, since the information processing apparatus 1 repeats S710 to S720, even if there are a plurality of USB storage devices, the drive corresponding to the administrator USB port while reading the information as processing targets in order. You can choose a name.

  In addition, since the internal USB port 21 is in a place where the USB storage device 25 cannot be inserted and removed without opening the panel 35, a user other than the administrator accidentally attaches the USB device to the internal USB port 21. It can be prevented in advance.

  That is, although the program can be started from the internal USB port 21, it is not in a state where it can be easily used by anyone other than the administrator, and the external USB ports 22 and 23 can be easily used by non-administrators. It is a mechanism that can not do.

  Therefore, despite the implementation of a mechanism that can be activated from the USB storage device 25 in an emergency, it is possible to prevent activation from the external USB ports 22 and 23, and the system may not start normally, or an unexpected program Can be prevented from being executed.

[Modifications, etc.]
As mentioned above, although embodiment of this invention was described, this invention is not limited to said specific one Embodiment, In addition, it can implement with a various form.

  For example, in the above-described embodiment, the information processing apparatus 1 having a function as a karaoke commander has been illustrated. However, the information processing apparatus 1 is normally configured to start from an IDE storage device and to start from a USB storage device in an emergency. Thus, it is arbitrary what kind of function the automatically activated function is. That is, in addition to the karaoke commander, the configuration of the present invention can be employed in a dedicated information processing apparatus for various specific uses.

The block diagram which shows the internal structure of information processing apparatus. The flowchart of the process performed with the power supply ON of information processing apparatus. The flowchart of the SCSI drive connection monitoring in OS. The flowchart of USB device connection monitoring in OS. The flowchart which shows the detail of S335. The flowchart which shows the detail of S345. The flowchart which shows the detail of S140. The flowchart which shows the detail of S620.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Information processing apparatus, 11 ... CPU, 13 ... ROM, 15 ... RAM, 17 ... Hard disk device, 20 ... USB interface, 21 ... Internal USB port, 22, 23 ... External USB port, 25 ... USB storage device, 31 ... Housing, 33 ... Opening, 35 ... Panel, 37 ... Fixing tool.

Claims (5)

An IDE storage device that functions as a hard disk drive connected by an IDE (Integrated Drive Electronics) method, and a plurality of USB ports to which a USB (Universal Serial Bus) storage device can be connected, each of the plurality of USB ports An information processing apparatus in which at least one USB port is an administrator USB port that can be used only by an administrator, and the remaining USB ports are general USB ports that can be used by non-administrators,
A drive that assigns a unique drive name to each of the detected IDE storage device or USB storage device when the IDE storage device and a USB storage device connected to the USB port are detected when the information processing apparatus is activated Name assignment means;
Using the drive name assigned to the IDE storage device by the drive name assigning means, the first file system on the IDE storage device is specified, and the specified first file system is specified First mounting means for mounting at a mount point of
Determining means for determining whether or not the first mounting means has successfully mounted the first file system;
When the determination unit determines that the mounting of the first file system has failed, the drive name allocated by the drive name allocation unit to the USB storage device connected to the administrator USB port is A drive name acquisition means to acquire;
Using the drive name acquired by the drive name acquisition means, the second file system on the USB storage device connected to the administrator USB port is specified, and the specified second file is specified Second mounting means for mounting the system to the mount point;
When the first file system or the second file system is mounted on the mount point by either the first mount unit or the second mount unit, the program is read from the file group under the mount point, and the program An information processing apparatus comprising: processing execution means for executing processing based on the above. When the USB storage device is detected, a virtual SCSI (Small Computer System Interface) interface used when accessing the USB storage device, and information disclosure for accessing information related to the SCSI interface and the USB storage device Interface generating means for generating an interface for each USB storage device,
The drive name assigning means assigns the drive name to the USB storage device accessible via the SCSI interface and detects the SCSI interface generated by the interface generating means, and When accessing the USB storage device via the interface, the drive name assigned to the USB storage device to be accessed is transmitted to the SCSI interface, so that it is stored in the storage area of the SCSI interface. Save the drive name,
The drive name acquisition unit reads information stored in a storage area included in the SCSI interface via the information disclosure interface, and a correspondence relationship between the administrator USB port and the drive name from the read information The information processing apparatus according to claim 1, wherein information indicating the information is acquired. The drive name assigning means, after assigning the drive name to the USB storage device, acquires information relating to the capacity of the USB storage device, so that the read capacity that is one type of SCSI command defined by the SCSI standard is used. The information processing apparatus according to claim 2, wherein a city command is issued, and the drive name is transmitted to the SCSI interface in a process corresponding to the read capacity command. The drive name acquisition unit sequentially reads information about all the USB storage devices that can acquire information via the information disclosure interface, and information on the USB port included in the read information is determined in advance. Determining whether the information corresponds to the administrator USB port, and if the information corresponds to the administrator USB port, obtain the drive name included in the read information. The information processing apparatus according to claim 2, wherein the information processing apparatus is characterized. The administrator USB port is housed inside the housing of the information processing apparatus, and the USB device can be inserted and removed when a panel provided in the housing is opened.
The general USB port is exposed to the outside of the housing, and a USB device can be inserted and removed without opening the panel. An information processing apparatus according to claim 1.

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