(command.CommandList children: [ (C {<echo>} {(SQ <'--- setlock requires arguments'>)}) (command.CommandList children: [ (command.Sentence child:(C {<setlock>} {<whatever>}) terminator:<Id.Op_Semi _>) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<echo>} {(SQ <'--- setlock complains if it cannot create lock file'>)}) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<'nonexistent/lock'>} {<echo>} {<wrong>}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<echo>} {(SQ <'--- setlock -x exits quietly if it cannot create lock file'>)}) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<-x>} {<'nonexistent/lock'>} {<echo>} {<wrong>}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<echo>} {(SQ <'--- setlock creates lock file'>)}) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<lock>} {<echo>} {<ok>}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<echo>} {(SQ <'--- setlock does not truncate lock file'>)}) (command.Simple words: [{<echo>} {<ok>}] redirects: [(redir op:<Id.Redir_Great '>'> loc:(redir_loc.Fd fd:1) arg:{<lock>})] do_fork: T ) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<lock>} {<cat>} {<lock>}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<rm>} {<-f>} {<lock>}) (C {<echo>} {(SQ <'--- setlock -n complains if file is already locked'>)}) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<lock>} {<sh>} {<-c>} {(SQ <'setlock -n lock echo one && echo two'>)}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) (C {<echo>} {(SQ <'--- setlock -nx exits quietly if file is already locked'>)}) (command.CommandList children: [ (command.Sentence child: (C {<setlock>} {<lock>} {<sh>} {<-c>} {(SQ <'setlock -nx lock echo one && echo two'>)}) terminator: <Id.Op_Semi _> ) (C {<echo>} {($ Id.VSub_QMark '$?')}) ] ) ] )