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ID Category Severity Type Date Submitted Last Update
0001145 [1003.1(2016)/Issue7+TC2] Shell and Utilities Editorial Error 2017-06-15 08:17 2017-06-15 08:55
Reporter yannregisgianas View Status public  
Assigned To
Priority normal Resolution Open  
Status New  
Name Yann REGIS-GIANAS
Organization University Paris Diderot
User Reference
Section Section 2.10.2
Page Number 0
Line Number 0
Interp Status ---
Final Accepted Text
Summary 0001145: compound-list does not required a terminating semicolon even in compound commands, which is contradictory with implementations.
Description The shell grammar is defining the non terminal for compound_list as follows:

      compound_list : linebreak term | linebreak term separator ;

and this non terminal is used in compound_commands like "until" for instance:

               until_clause : Until compound_list do_group ;

However, a "term" may derive a simple command like "a".

Therefore, the following script seems accepted by the grammar:

                                   until a do b; done

while the usual shell implementations require a semicolon or a newline to be inserted just after the "a" for this script to be syntactically correct.
Desired Action Fix the grammar to comply with implementations.
Tags No tags attached.
Attached Files

- Relationships
related to 0001046Closed 1003.1(2013)/Issue7+TC1 Grammar production if_clause allows "if command then" 

-  Notes
(0003764)
geoffclare (manager)
2017-06-15 08:55

The command:

until a do b; done

is not accepted by the grammar because in the grammar do_group requires a "do" keyword to be present, and this command does not have one. (The word "do" in this command is an ordinary word to be passed as an argument to "a"; it is not recognised as a keyword.)

This appears to be the same misinterpretation of the shell grammar rules as was made in 0001046.

- Issue History
Date Modified Username Field Change
2017-06-15 08:17 yannregisgianas New Issue
2017-06-15 08:17 yannregisgianas Name => Yann REGIS-GIANAS
2017-06-15 08:17 yannregisgianas Organization => University Paris Diderot
2017-06-15 08:17 yannregisgianas Section => Section 2.10.2
2017-06-15 08:17 yannregisgianas Page Number => 0
2017-06-15 08:17 yannregisgianas Line Number => 0
2017-06-15 08:55 geoffclare Note Added: 0003764
2017-06-15 08:55 geoffclare Relationship added related to 0001046


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