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Full Discussion: Problem in understanding debugging
Top Forums Shell Programming and Scripting Problem in understanding debugging Post 302769038 by scriptor on Monday 11th of February 2013 05:35:14 AM
Old 02-11-2013
Problem in understanding debugging
Hi

i was going through the script debugging technique. below example was given in the book.
Code:
1   #!/bin/sh
     2
     3   Failed() {
     4   if [ $1 -ne 0 ] ; then
     5   echo "Failed. Exiting." ; exit 1 ;
     6   fi
     7   echo "Done."
     8   }
     9
    10   echo "Deleting old backups, please wait... \c"
    11   rm -r backup > /dev/null 2>&1
    12   Failed $?
    13
    14   echo "Make backup (y/n)? \c"
    15   read RESPONSE
    16   case $RESPONSE in
    17   [yY]|[Yy][Ee][Ss]|*)
    18   echo "Making backup, please wait... \c"
    19   cp -r docs backup
    20   Failed
    21   [nN]|[Nn][Oo])
    22   echo "Backup Skipped." ;;
    23  esac

my problem is when author debug the script with -nv option he is getting below o/p
Code:
[nN]|[Nn][Oo]) ./buggy2.sh: syntax error at line 21: ')'
unexpected

however when i debug the same script with same option i am getting below o/p
Code:
./debug6: 21: Syntax error: ")" unexpected (expecting ";;")

in my case i just change the name of the script.(i use debug6 and author used buggy2.sh rest i simply copy paste the script.)
why here i am getting bit more info in compare to author's o/p. is there is some problem or it is ok.

to correct the script author suggested to put (; ; after Failed in line no. 20 like below.
Code:
Failed ;;

my question is why i need to use 2 colon after Failed not one?
also how does author know just by seeing one single line(means by seeing o/p of debug) that he need to put 2 colon after Failed.
 

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LEARN ABOUT DEBIAN

globus_gsi_credential_constants

Credential Constants(3) 				       globus gsi credential					   Credential Constants(3)

NAME

       Credential Constants -

   Enumerations
       enum globus_gsi_cred_error_t { GLOBUS_GSI_CRED_ERROR_SUCCESS =  0, GLOBUS_GSI_CRED_ERROR_READING_PROXY_CRED =  1,
	   GLOBUS_GSI_CRED_ERROR_READING_HOST_CRED =  2, GLOBUS_GSI_CRED_ERROR_READING_SERVICE_CRED =  3, GLOBUS_GSI_CRED_ERROR_READING_CRED =	4,
	   GLOBUS_GSI_CRED_ERROR_WRITING_CRED =  5, GLOBUS_GSI_CRED_ERROR_WRITING_PROXY_CRED =	6, GLOBUS_GSI_CRED_ERROR_CHECKING_PROXY =  7,
	   GLOBUS_GSI_CRED_ERROR_VERIFYING_CRED =  8, GLOBUS_GSI_CRED_ERROR_WITH_CRED =  9, GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT =  10,
	   GLOBUS_GSI_CRED_ERROR_WITH_CRED_PRIVATE_KEY =  11, GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT_CHAIN =  12, GLOBUS_GSI_CRED_ERROR_ERRNO =  13,
	   GLOBUS_GSI_CRED_ERROR_SYSTEM_CONFIG =  14, GLOBUS_GSI_CRED_ERROR_WITH_CRED_HANDLE_ATTRS =  15, GLOBUS_GSI_CRED_ERROR_WITH_SSL_CTX =
	   16, GLOBUS_GSI_CRED_ERROR_WITH_CALLBACK_DATA =  17, GLOBUS_GSI_CRED_ERROR_CREATING_ERROR_OBJ =  18,
	   GLOBUS_GSI_CRED_ERROR_KEY_IS_PASS_PROTECTED =  19, GLOBUS_GSI_CRED_ERROR_NO_CRED_FOUND =  20, GLOBUS_GSI_CRED_ERROR_SUBJECT_CMP =  21,
	   GLOBUS_GSI_CRED_ERROR_GETTING_SERVICE_NAME =  22, GLOBUS_GSI_CRED_ERROR_BAD_PARAMETER =  23, GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT_NAME
	   =  24, GLOBUS_GSI_CRED_ERROR_LAST =	25 }
       enum globus_gsi_cred_type_t

Enumeration Type Documentation
   enum globus_gsi_cred_error_t
       Credential Error codes.

       Enumerator:

       GLOBUS_GSI_CRED_ERROR_SUCCESS
	      Success - never used.

       GLOBUS_GSI_CRED_ERROR_READING_PROXY_CRED
	      Failed to read proxy credential.

       GLOBUS_GSI_CRED_ERROR_READING_HOST_CRED
	      Failed to read host credential.

       GLOBUS_GSI_CRED_ERROR_READING_SERVICE_CRED
	      Failed to read service credential.

       GLOBUS_GSI_CRED_ERROR_READING_CRED
	      Failed to read user credential.

       GLOBUS_GSI_CRED_ERROR_WRITING_CRED
	      Failed to write credential.

       GLOBUS_GSI_CRED_ERROR_WRITING_PROXY_CRED
	      Failed to write proxy credential.

       GLOBUS_GSI_CRED_ERROR_CHECKING_PROXY
	      Error checking for proxy credential.

       GLOBUS_GSI_CRED_ERROR_VERIFYING_CRED
	      Failed to verify credential.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED
	      Invalid credential.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT
	      Invalid certificate.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED_PRIVATE_KEY
	      Invalid private key.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT_CHAIN
	      Invalid certificate chain.

       GLOBUS_GSI_CRED_ERROR_ERRNO
	      System error.

       GLOBUS_GSI_CRED_ERROR_SYSTEM_CONFIG
	      A Globus GSI System Configuration call failed.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED_HANDLE_ATTRS
	      Invalid credential handle attributes.

       GLOBUS_GSI_CRED_ERROR_WITH_SSL_CTX
	      Faulty SSL context.

       GLOBUS_GSI_CRED_ERROR_WITH_CALLBACK_DATA
	      Faulty callback data.

       GLOBUS_GSI_CRED_ERROR_CREATING_ERROR_OBJ
	      Failed to aggregate errors.

       GLOBUS_GSI_CRED_ERROR_KEY_IS_PASS_PROTECTED
	      Error reading private key - the key is password protected.

       GLOBUS_GSI_CRED_ERROR_NO_CRED_FOUND
	      Couldn't find credential to read.

       GLOBUS_GSI_CRED_ERROR_SUBJECT_CMP
	      Credential subjects do not compare.

       GLOBUS_GSI_CRED_ERROR_GETTING_SERVICE_NAME
	      Unable to obtain service name from CN entry.

       GLOBUS_GSI_CRED_ERROR_BAD_PARAMETER
	      Invalid function parameter.

       GLOBUS_GSI_CRED_ERROR_WITH_CRED_CERT_NAME
	      Failed to process certificate subject.

       GLOBUS_GSI_CRED_ERROR_LAST
	      End marker - never used.

   enum globus_gsi_cred_type_t
       Credential Type

       An enum representing a GSI Credential Type which holds info about the type of a particular credential. The three types of credential can
       be: GLOBUS_PROXY, GLOBUS_USER, or GLOBUS_HOST.

       See also:
	   Credential Handle Management

Author
       Generated automatically by Doxygen for globus gsi credential from the source code.

Version 5.3							  Mon Apr 30 2012					   Credential Constants(3)
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