Qshell Interpreter (qsh) - FTP Directory Listing - IBM

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Description Options Operands Exit status You can use local to make a variable local to a function. When a variable is made local, it inherits the initial value and exported and read-only attributes from the variable with the same name in the surrounding scope, if there is one. Otherwise, the variable is initially unset. qsh uses dynamic scoping, so that if you make the variable alpha local to function foo, which then calls function bar, references to the variable alpha made inside bar will refer to the variable declared inside foo, not to the global variable named alpha. The special parameter - is the only special parameter that can be made local . By making - local, any shell options that are changed with set inside the function are restored to their original values when the function returns. None. Related information Each name specifies a variable in the current environment. If a value is also specified, the value of the variable is updated. v 0 when successful. v >0 when called from outside of a function. v “export - Set export attribute for variables” v “readonly - Set read-only attribute for variables” v “set - Set or unset options and positional parameters” v “unset - Unset values of variables and functions” [ Legal | AS/400 Glossary ] readonly - Set read-only attribute for variables Synopsis Description 94 Qshell Interpreter (qsh) readonly [ -p][ name [ =value ] ... ] You can use readonlyto set the read-only attribute for the variable(s) specified by name. A variable with the read-only attribute cannot have its value changed by a subsequent assignment and cannot be unset. Note that qsh can change the value of a variable with the read-only attribute. For example, if PWD has the read-only attribute, it’s value will be changed when you change the current working directory.
Options Operands Exit status Related information Examples When no arguments are specified, qsh displays a list of the variables with the read-only attribute and their values. v -p Precede each line of the output with the word “readonly ” so it is displayed in a re-enterable format. Each name specifies a variable in the current environment. If a value is also specified, the value of the variable is updated before setting the read-only attribute. v 0 when successful. v >0 when unsuccessful. v “export - Set export attribute for variables” v “local - Assign a local variable in a function” v “set - Set or unset options and positional parameters” v “unset - Unset values of variables and functions” 1. Set the read-only attribute for an existing variable: readonly ALPHA 2. Set the value and read-only attribute of a new variable: readonly ALPHA=one 3. List all variables with the read-only attribute: readonly [ Legal | AS/400 Glossary ] set - Set or unset options and positional parameters Synopsis Description set [ -abCefFmnuvx- ][-o option ][argument ... ] set [ +abCefFmnuvx- ][+o option ][argument ... ] You can use set to: v Display the names and values of all shell variables by specifying no options or arguments. v Display the option settings by specifying the -o option but no option. v Set an option by specifying a - (minus) followed by the option letter or by specifying -o option. v Unset an option by specifying a + (plus) followed by the option letter or by specifying +o option. v Set positional parameters by specifying argument(s). v Unset positional parameters by specifying — but no argument. Chapter 4. Utilities 95
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Function key Description F7 (Up) Ro
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CCSIDs supported by qsh 00273 00273
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Parameters Positional parameters Sp
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Variables used by qsh 14 Qshell Int
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Word expansions Tilde expansion Par
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$(command) or by using backquotes:
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20 Qshell Interpreter (qsh) Arithme
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Here-documents Using commands [ n ]
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Lists Asynchronous lists Sequential
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Utilities for defining aliases The
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command - Run a simple command Syno
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Options Operands Exit status None.
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Operands Exit Status Related inform
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Page 94 and 95: Description Actions Options 78 Qshe
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Page 98 and 99: For more information about the java
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Page 108 and 109: wait - Wait for process completion
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Page 118 and 119: Description Operands Exit Status Ex
Page 120 and 121: true - Return true value Synopsis D
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Page 124 and 125: expr 10 = 10 [ Legal | AS/400 Gloss
Page 126 and 127: Exit Status Examples -t Mark every
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