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Full Discussion: nested double quota and white space inside variable
Top Forums Shell Programming and Scripting nested double quota and white space inside variable Post 302422274 by lindazhou on Tuesday 18th of May 2010 02:50:02 AM
Old 05-18-2010
nested double quota and white space inside variable
I have a question about nested double quotes. Any help is appreciated.

Here are my commands on Mac OS.
# string="Ethernet \"USB Ethernet\" \"Bluetooth DUN\" AirPort FireWire \"Bluetooth PAN\""
# echo $string
Ethernet "USB Ethernet" "Bluetooth DUN" AirPort FireWire "Bluetooth PAN"
# networksetup -ordernetworkservices $string - This gives error.
The networksetup command requires quote around service name that has space in it.
But when shell expands the $string that has nested quotes, it treats the string that has quote around it as two separate words. In this case, "USB Ethernet" becomes 'USB' 'Ethernet'. What I really want is "USB Ethernet".
 

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LEARN ABOUT LINUX

kue

KUE(4)							   BSD Kernel Interfaces Manual 						    KUE(4)

NAME

     kue -- Kawasaki LSI KL5KUSB101B USB Ethernet driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device uhci
	   device ohci
	   device usb
	   device kue

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   if_kue_load="YES"

DESCRIPTION

     The kue driver provides support for USB Ethernet adapters based on the Kawasaki LSI KL5KLUSB101B chipset.

     The KL5KLUSB101B supports a 128-entry multicast filter, single perfect filter entry for the station address and promiscuous mode.	Packets
     are received and transmitted over separate USB bulk transfer endpoints.

     The Kawasaki chipset supports only 10Mbps half-duplex mode, hence there are no ifmedia(4) modes to select.

     For more information on configuring this device, see ifconfig(8).

HARDWARE

     The kue driver supports Kawasaki LSI KL5KLUSB101B based USB Ethernet adapters including:

     o	 3Com 3c19250
     o	 3Com 3c460 HomeConnect Ethernet USB Adapter
     o	 ADS Technologies USB-10BT
     o	 AOX USB101
     o	 ATen UC10T
     o	 Abocom URE 450
     o	 Corega USB-T
     o	 D-Link DSB-650C
     o	 Entrega NET-USB-E45, NET-HUB-3U1E
     o	 I/O Data USB ETT
     o	 Kawasaki DU-H3E
     o	 LinkSys USB10T
     o	 Netgear EA101
     o	 Peracom USB Ethernet Adapter
     o	 Psion Gold Port USB Ethernet adapter
     o	 SMC 2102USB, 2104USB

DIAGNOSTICS

     kue%d: watchdog timeout  A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the
     transmission before a timeout expired.

     kue%d: no memory for rx list  The driver failed to allocate an mbuf for the receiver ring.

SEE ALSO

     arp(4), netintro(4), ng_ether(4), ifconfig(8)

HISTORY

     The kue device driver first appeared in FreeBSD 4.0.

AUTHORS

     The kue driver was written by Bill Paul <wpaul@ee.columbia.edu>.

BUGS

     The kue driver does not accumulate Ethernet collisions statistics because the Kawasaki firmware does not appear to maintain any internal sta-
     tistics.

BSD
								  October 7, 2006							       BSD
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