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#9
September 22nd, 2002, 10:04 PM
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| shell variable shortcuts The "?" is the C shell way of saying "if the variable isn't defined, return NULL rather than an error." In Bash undefined variables by default are equal to NULL so as long as it was quoted properly, it wouldn't be an error. A neat alternative in Bash, however, is to use a notation like ${TERM:-tty} which says that if TERM is defined, use its value, otherwise use the value 'tty' at this point.
__________________ Author, Learning Unix for Mac OS X (O'Reilly), among other books. Check out http://books.intuitive.com/  |
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#10
September 23rd, 2002, 07:17 AM
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| That worked like a charm! Thanks for all the help! d1taylor - I just may have to buy your book. 
__________________ holmBrew =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Great Web Hosting: www.elfon.com PowerBook(Prismo) 400Mhz G3 266Mhz G3 MT Gossamar 400Mhz G3 Yosemite 800Mhz G4 Quicksilver (my work box) All running Mac OS X 10.2.4 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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