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Full Discussion: Why is it always false?
Top Forums Shell Programming and Scripting Why is it always false? Post 302191425 by JeffR on Friday 2nd of May 2008 02:08:38 PM
Old 05-02-2008
Question Thank you, Thank you, Thank you!

I had the 'then', just forgot to put it in the pseudo-code, but the semi-colon was the key. Thanks so much! I've wrestled with this for days.

Is the semi-colon always needed in an if statement? I've been reading O'Reilly's Classic Shell Scripting and it doesn't mention the semi-colon at all. What gives?
 

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true(1) 						      General Commands Manual							   true(1)

NAME
true, false - Returns a standard exit value SYNOPSIS
true false STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: true: XCU5.0 false: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. DESCRIPTION
The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to shell commands. NOTES
The special built-in utility : (colon) is sometimes more efficient than the true command. EXIT STATUS
[Tru64 UNIX] The nonzero value returned by the false command may vary from system to system. EXAMPLES
To construct a loop in a shell procedure, enter: while true do date sleep 60 done This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence. SEE ALSO
Commands: csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p) Standards: standards(5) true(1)
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