Qshell Interpreter (qsh) - FTP Directory Listing - IBM

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Command exit status Pipelines 2. for a shell function of that name, then 3. for a regular built-in utility of that name, then 4. each directory in the PATH variable in turn for the regular utility. Command names containing a slash (/) are simply run as a regular utility without performing any of the above searches. A built-in utility is run internal to the shell, without starting a new process. A special built-in utility is different from a regular built-in utility in these respects: 1. A syntax error in a special built-in utility causes a non-interactive shell to exit. 2. Variable assignments specified with a special built-in utility remain in effect after the utility completes. These are the special built-in utilities: break, colon, continue, dot, eval, exec, exit, export, readonly, return, set, shift, trap, and unset. When a shell function is run, all of the shell positional parameters (except the special parameter 0, which remains unchanged) are set to the arguments of the shell function. The variables which are explicitly placed in the environment of the command (by placing assignments to them before the function name) are made local to the function and are set to the specified values. The positional parameters are restored to their original values when the shell function completes. When a regular utility is run, qsh starts a new process, passing the arguments and the environment to the program. If the program is a shell script, qsh will interpret the program in a subshell. qsh will reinitialize itself in this case, so that the effect will be as if a new shell had been invoked to handle the shell script. Each command has an exit status that can influence the behavior of other shell commands. By convention, a command exits with zero for normal or success, and non-zero for failure, error, or a false indication. The documentation for each command describes the exit codes it returns and what they mean. The exit status can be one of these values: v 0 for success. v 1 to 125 for failure. v 126 when qsh finds the command but it is not executable. v 127 when qsh cannot find the command. v 128 and above when the command is ended by a signal. The value is 128 plus the signal number. [ Legal | AS/400 Glossary ] A pipeline is a sequence of one or more commands separated by the pipeline control operator (|). The standard output of all but the last command is connected to the standard input of the next command. The format for a pipeline is: Chapter 3. Command Language 23
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Page 22 and 23: Function key Description F7 (Up) Ro
Page 24 and 25: CCSIDs supported by qsh 00273 00273
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Page 28 and 29: Parameters Positional parameters Sp
Page 30 and 31: Variables used by qsh 14 Qshell Int
Page 32 and 33: Word expansions Tilde expansion Par
Page 34 and 35: $(command) or by using backquotes:
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Page 40 and 41: Lists Asynchronous lists Sequential
Page 42 and 43: then list4 ] ... [ else list5 ] cas
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Page 46 and 47: Utilities for defining aliases The
Page 48 and 49: command - Run a simple command Syno
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Page 70 and 71: Primaries 54 Qshell Interpreter (qs
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Page 76 and 77: Description Options 60 Qshell Inter
Page 78 and 79: Environment Variables Exit Status R
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Exit Status Examples v 0 on success
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Related Information print - Write o
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Options Operands Exit status None.
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Description Actions Options 78 Qshe
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Exit Status Examples Notes 80 Qshel
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For more information about the java
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jar - Archive Java files Ignored op
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Description Options Operands Exit s
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kill - Terminate or signal processe
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Exit status Examples v 0 when succe
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wait - Wait for process completion
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Description Options Operands Exit s
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Options Operands Exit status Relate
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unset - Unset values of variables a
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Exit status v 0 when successful. [
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Description Operands Exit Status Ex
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true - Return true value Synopsis D
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Exit Status Examples 106 Qshell Int
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expr 10 = 10 [ Legal | AS/400 Gloss
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Exit Status Examples -t Mark every
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Exit Status 112 Qshell Interpreter
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Error Conditions Related Informatio
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Authorities Return Value Error Cond
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118 Qshell Interpreter (qsh)
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120 Qshell Interpreter (qsh) #inclu
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122 Qshell Interpreter (qsh) while
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124 Qshell Interpreter (qsh) #pragm
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126 Qshell Interpreter (qsh) /* 4.
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128 Qshell Interpreter (qsh) int c;
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130 Qshell Interpreter (qsh) } /* G
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132 Qshell Interpreter (qsh) char *
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USER(QSHSVR) AUT(*USE) GRTOBJAUT OB
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