Return values

vip Example Scripts: CGI Scripts
Example Scripts: Scriptsscripts can Shell Scripts: Return values
Appendix: Return valuesreturn values of any type with Flow control: end
Shell Immediate Commands: exit, quit, endend Operators: Boolean Or with Variable "||="
Operators: Bitwise Or with Variable "|="
Operators: Bitwise Or "|"
Operators: Boolean Or "||"or, Flow control: if … thenif executed outside any Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure, with Flow control: returnreturn, Operators: Boolean Or with Variable "||="
Operators: Bitwise Or with Variable "|="
Operators: Bitwise Or "|"
Operators: Boolean Or "||"or they can decide to Operators: Bitwise Not "~"
Operators: Boolean Negation "!"not Flow control: returnreturn any Glossary: Valuevalue Operators: Make Identifier "@"at all. What they are expected to Flow control: do … loopdo depends on Flow control: if … then
Flow control: try … thenthe method of invocation.

• Flow control: if … thenIf invoked from Flow control: if … then
  Flow control: try … thenthe bash Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or similar, Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Instructions: getgets called via Flow control: if … then
  Flow control: try … thenthe unix process forking mechanism. Flow control: if … then
  Flow control: try … thenThen you can Flow control: returnreturn only tiny little integers in range [0 to 255]. List functions: thisThis Shell Scripts: Return values
  Appendix: Return valuesreturn value is expected to be some kind of error code, Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not Flow control: if … then
  Flow control: try … thenthe "result" of Flow control: if … then
  Flow control: try … thenthe program. 0 typically means 'success' any other Glossary: Valuevalue indicates an error.
  Flow control: if … thenIf a Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Flow control: do … loopdoes Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not Flow control: returnreturn a result, that is, Flow control: if … thenif it executes Flow control: end
  Shell Immediate Commands: exit, quit, endend with no Vipsi command syntax: Arguments
  Glossary: Argumentsargument Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or runs beyond Flow control: if … then
  Flow control: try … thenthe Text functions: file
  Instructions: filefile Flow control: end
  Shell Immediate Commands: exit, quit, endend, Flow control: if … then
  Flow control: try … thenthen Flow control: if … then
  Flow control: try … thenthe Shell Scripts: Return values
  Appendix: Return valuesreturn value is set to 0, which is likely to indicate 'no error'.
  Don't rely on Flow control: if … then
  Flow control: try … thenthe exact Glossary: Valuevalue of Flow control: if … then
  Flow control: try … thenthe Flow control: returnreturn code! Flow control: if … then
  Flow control: try … thenThe bash itself Flow control: returnreturns 126 Flow control: if … thenif a command was found but Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not executable, 127 Flow control: if … thenif a command was Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not found, 128+N Flow control: if … then
  Flow control: if … thenif the command crashed with exception N Operators: Boolean And with Variable "&&="
  Operators: Bitwise And with Variable "&="
  Operators: Bitwise And "&"
  Operators: Boolean And "&&"and possibly any other error code for other Flow controlconditions.
  In Operators: Add "+"addition vipsi Flow control: returnreturns 125 in Flow control: if … then
  Flow control: try … thenthe following cases: Flow control: if … then
  Flow control: if … thenif the Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript crashes with an error Flow control: if … then
  Flow control: try … thenthen List functions: thisthis error code is returned Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or 125 Flow control: if … then
  Flow control: if … thenif the error code was too high. Flow control: if … then
  Flow control: if … thenIf the Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Flow control: returnreturns a non-numeric Glossary: Valuevalue Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or a numeric Glossary: Valuevalue out of range, Flow control: if … then
  Flow control: try … thenthen Flow control: if … then
  Flow control: try … thenthe result is substituted with 125 too.
• Flow control: if … thenIf invoked from another vip Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or Flow control: if … then
  Flow control: try … thenthe vipsi command line using Text functions: sys
  Instructions: syssys Flow control: if … then
  Flow control: try … thenthen Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Instructions: getgets called in Flow control: if … then
  Flow control: try … thenthe same way as from Flow control: if … then
  Flow control: try … thenthe bash shell. All said there is true here too, except for Flow control: if … then
  Flow control: try … thenthe additional result codes used by Flow control: if … then
  Flow control: try … thenthe bash. Flow control: if … then
  Flow control: try … thenThe Shell Scripts: Return values
  Appendix: Return valuesreturn value from Flow control: if … then
  Flow control: try … thenthe invoked Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript is Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not returned to Flow control: if … then
  Flow control: try … thenthe Functions with varying return types: call
  Instructions: callcaller, Flow control: if … then
  Flow control: try … thenthe Functions with varying return types: call
  Instructions: callcaller Instructions: getgets Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript output to Constants: stdoutstdout instead. Flow control: if … thenIf an error in Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript occurs Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or Flow control: if … then
  Flow control: if … thenif the Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Flow control: returnreturns a non-zero Glossary: Valuevalue, Flow control: if … then
  Flow control: try … thenthen an error is triggered in Flow control: if … then
  Flow control: try … thenthe Functions with varying return types: call
  Instructions: callcaller Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript which must be handled with Flow control: try … thentry. errorstr Flow control: if … then
  Flow control: try … thenthen contains some useful error message.
• Flow control: if … thenIf invoked from another vip Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or Flow control: if … then
  Flow control: try … thenthe vipsi command line using Functions with varying return types: call
  Instructions: callcall Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or Functions with varying return types: include
  Instructions: includeinclude, Flow control: if … then
  Flow control: try … thenthen Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript can Flow control: returnreturn a result of any type Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or optionally no result Operators: Make Identifier "@"at all. Flow control: if … then
  Flow control: if … thenIf the Functions with varying return types: call
  Instructions: callcaller Instructions: requirerequires a result Flow control: if … then
  Flow control: try … thenthen it will assume 0 Flow control: if … thenif Flow control: end
  Shell Immediate Commands: exit, quit, endend Flow control: returnreturns no result.
• Flow control: if … then
  Flow control: if … thenIf the Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript is a Glossary: text, text_valtext value which is executed with Functions with varying return types: eval
  Instructions: evaleval, Flow control: if … then
  Flow control: try … thenthen Flow control: if … then
  Flow control: try … thenthe Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript can Flow control: returnreturn a result of any type Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or optionally no result Operators: Make Identifier "@"at all. Flow control: if … then
  Flow control: if … thenIf the Functions with varying return types: call
  Instructions: callcaller Instructions: requirerequires a result Operators: Boolean And with Variable "&&="
  Operators: Bitwise And with Variable "&="
  Operators: Bitwise And "&"
  Operators: Boolean And "&&"and Flow control: end
  Shell Immediate Commands: exit, quit, endend Flow control: returnreturns no result, Flow control: if … then
  Flow control: try … thenthen an error is generated.