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Top Forums Shell Programming and Scripting need help deciphering this if statement Post 302477834 by Franklin52 on Monday 6th of December 2010 01:12:24 PM
Old 12-06-2010
Quote:
Originally Posted by Straitsfan
I know the * is a wildcard symbol, but the $ I'm only familiar with in displaying the values of variables and the like, so how do these symbols mean what they do in this expression?
$1 is the 1st positional parameter passed to your script.
 

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syms(4) 						     Kernel Interfaces Manual							   syms(4)

NAME
syms - Symbol table SYNOPSIS
#include <sym.h> #include <symconst.h> DESCRIPTION
The symbol table departs from the standard COFF symbol table. The symbol table consists of many tables unbundling information usually found in the one COFF symbol table. The symbol table should be viewed as a handcrafted, network-style database designed for space and access efficiency. The following structures or tables appear in the symbol table: -------------------------------------------------------------------------- Table Contents -------------------------------------------------------------------------- Symbolic header Sizes and locations of all other tables File descriptors Per file locations for other tables Procedure descriptors Frame information and location of procedure information Local symbols Local type, local variable, and scoping informa- tion Local strings String space for local symbols Line numbers Compacted by encoding, contains a line per instruction Relative file desc. Indirection for inter-file symbol access Optimization symbols To be defined Auxiliary symbols Data type information for local and external sym- bols External symbols Global text and data symbols External strings String space for external symbols Dense numbers Index pairs (file, symbol) for compiler use (-oldc only) -------------------------------------------------------------------------- External and local symbols are both represented using the following structure: struct { long iss; /* index into string space */ long value; /* address, size, etc.; depends on sc and st */ unsigned st: 6; /* symbol type (e.g., local, param, etc.) */ unsigned sc: 5; /* storage class (e.g., text, bss, etc.) */ unsigned reserved: 1; unsigned index; /* index to symbol or auxiliary tables */ }; RELATED INFORMATION
ldfcn(4). delim off syms(4)
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