[asterisk-bugs] [JIRA] (ASTERISK-26481) Major issues with FILE and LEN functions

[Jonathan Harris (JIRA)]

Jonathan Harris created ASTERISK-26481:
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             Summary: Major issues with FILE and LEN functions
                 Key: ASTERISK-26481
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26481
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Functions/func_cut
    Affects Versions: 14.0.1
         Environment: Linux 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:42:33 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
            Reporter: Jonathan Harris
            Severity: Critical


Something appears wrong (by the way, Component with id 'functions/func_len' does not exist)

This bit of dialplan.....

exten => 5,1,Verbose(Context: ${CONTEXT} Exten:${EXTEN})
    same => n,Set(featurefile=/home/test/feature-1.txt)
    same => n,set(myList=1,12,123,1234,12345,123456,A,AB,ABC,ABCD,ABCDE,ABC123)
    same => n,While($["${SET(rawVar=${SHIFT(myList)})}" != ""])
    same => n,SET(FILE(${featurefile})=${rawVar})
    same => n,SET(fileVar=${FILE(${featurefile},0,1,l,u)})
    same => n,SET(hexDump=${SHELL(hd ${featurefile})})
    same => n,Verbose(Before file: ---${rawVar}--- len ${LEN(rawVar)} after file: ---${fileVar}--- len ${LEN(fileVar)} hexdump:${hexDump})
    same => n,EndWhile()
    same => n,Hangup()


...produces this output: (tidied only for posting) - this is messed up in so many ways.

LEN is showing the wrong length. 
1 character gets a weird character added.
23, and 4  characters OK
5 characters loses a character - BUT LOOK! Even though hexdump prints the correct contents and length, have a close look at this: 35|12345|  whereas normally it would have a space before the pipe.
6 characters is OK

Before file: ---1--- len 6 after file: ---1▒--- len 7 hexdump:00000000  31|1| 00000001
Before file: ---12--- len 6 after file: ---12--- len 7 hexdump:00000000  31 32 |12| 00000002
Before file: ---123--- len 6 after file: ---123--- len 7 hexdump:00000000  31 32 33  |123| 00000003

[Oct 18 12:23:53] ERROR[8584][C-0000001a]: json.c:704 ast_json_vpack: Error building JSON from '{s: s, s: s}': Invalid UTF-8 string.
[Oct 18 12:23:53] ERROR[8584][C-0000001a]: stasis_channels.c:773 ast_channel_publish_varset: Error creating message

Before file: ---1234--- len 6 after file: ---1234--- len 7 hexdump:00000000  31 32 33 34   |1234| 00000004
Before file: ---12345--- len 6 after file: ---1234--- len 7 hexdump:00000000  31 32 33 34 35|12345| 00000005
Before file: ---123456--- len 6 after file: ---123456--- len 7 hexdump:00000000  31 32 33 34 35 36 |123456| 00000006

[Oct 18 12:23:53] ERROR[8584][C-0000001a]: json.c:704 ast_json_vpack: Error building JSON from '{s: s, s: s}': Invalid UTF-8 string.
[Oct 18 12:23:53] ERROR[8584][C-0000001a]: stasis_channels.c:773 ast_channel_publish_varset: Error creating message

Before file: ---A--- len 6 after file: ---A▒--- len 7 hexdump:00000000  41|A| 00000001
Before file: ---AB--- len 6 after file: ---AB--- len 7 hexdump:00000000  41 42 |AB| 00000002
Before file: ---ABC--- len 6 after file: ---ABC--- len 7 hexdump:00000000  41 42 43  |ABC| 00000003

[Oct 18 12:23:53] ERROR[8584][C-0000001a]: json.c:704 ast_json_vpack: Error building JSON from '{s: s, s: s}': Invalid UTF-8 string.
[Oct 18 12:23:53] ERROR[8584][C-0000001a]: stasis_channels.c:773 ast_channel_publish_varset: Error creating message

Before file: ---ABCD--- len 6 after file: ---ABCD--- len 7 hexdump:00000000  41 42 43 44   |ABCD| 00000004
Before file: ---ABCDE--- len 6 after file: ---ABCD--- len 7 hexdump:00000000  41 42 43 44 45|ABCDE| 00000005
Before file: ---ABC123--- len 6 after file: ---ABC123--- len 7 hexdump:00000000  41 42 43 31 32 33 |ABC123|



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