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IZ88805: REGCOMP() FAILS TO COMPILE EXTENDED REGULAR EXPRESSION APPLIES TO AIX 6100-07

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APAR status

  • Closed as program error.

Error description

  • Regular expression like "A?(X|Y|Z)" failed to be compiled
by regcomp and regexec gives "No Match Found" error
Problem does not occur by using PERL, because it will not
use libc.a.

Local fix

  • 



Problem summary


    

  • Regular expression like "A?(X|Y|Z)" failed to be compiled
by regcomp and regexec gives "No Match Found" error.
Following testcase shows the issue:

main()
{
    char*     ptn = "A?(X|Y|Z)";
    char*  wrk 6  = { "xxAXxx","xxAYxx","xxAZxx","xxXxxx",
                       "xxYxxx",  "xxZxxx" };
    regex_t   re;
    int   i, sts;

    printf(" n  Pattern:  "%s " n n", ptn);

    if ( regcomp(&re, ptn, REG_EXTENDED) == 0 )
    {   for(i=0; i<6; i++)
        {       printf("   %s ...(%d) n", wrk i ,
                    regexec(&re, wrk i , (size_t)0,NULL,0));
        }
    }
    printf(" n");
    regfree(&re);
}

Pattern: "A?(X|Y|Z)"
xxAXxx ...(0)
xxAYxx ...(0)
xxAZxx ...(0)
xxXxxx ...(0)
incorrect output for these two expressions.
xxYxxx ...(1)
xxZxxx ...(1)

    



Problem conclusion


    

  • regcomp() need modification, A flag needs to be set with proper
conditional statement  while  mapping the characters in the
table.

    



Temporary fix


    

  • 



Comments


    

  • 6100-06 - use AIX APAR IV04945
6100-07 - use AIX APAR IZ88805
7100-00 - use AIX APAR IZ86074

    



APAR Information




    

  • APAR number
    IZ88805
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2010-11-10
    • 

  • Closed date
    2010-11-10
    • 

  • Last modified date
    2013-03-24
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IY81085
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX 610 STD EDI
    • 

  • Fixed component ID
    5765G6200
    • 



Applicable component levels


    

  • R610  PSY  U848307
       UP11/10/25  I  1000
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            17 December 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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