Program:       DELETE

Purpose:       Delete sets

Category:      UTILITY

File:          delete.c

Author:        M. Vogelaar

Keywords:

** LIST=       List with GIPSY set names?                         Y/[N]

               Can be either Y or N. If user specifies LIST=Y, a list
               with set names in the current directory is displayed.
               The default is LIST=N


   INSET=      Give name of set to delete:                       [stop]
   
               Enter:
               1) One set name, e.g.:
                  INSET=AURORA
               2) Set names separated by a semicolon (;) e.g.:
                  INSET=AURORA;ngc3079a;ngc3079b
               3) A path followed by a set name (no wildcard expansion):
                  INSET=./WORK/ngc400
               4) Set name(s) containing the wildcard character '*'.
                  Wildcards can appear everywhere in a name.
                  The wildcard expansion works only in the current
                  directory!
                  INSET=ngc*   (Delete all GIPSY sets that start 
                                with 'ngc')
                  INSET=*      (Delete all GIPSY sets in current dir.)
                  
               The names of sets which the user wants to delete
               are asked in a loop. Press carriage return to abort this
               loop and to stop the program.


   OK=         Ok to delete <setname> ?                           Y/[N]
   
               Confirm the choice for EACH file that you entered
               with INSET=
               Long file names are cut off. A number of dots indicate
               if this has happened.



Description:   DELETE deletes GIPSY sets (image part and descriptor
               part). After the introduction of the GDS server,
               it became more important to be able to delete sets
               within the environment where the server is running.
               If f.i. you delete sets with the unix 'rm' command,
               the program DISK will still list those sets if the
               server is still running. Program DELETE doe the job
               properly. It checks whether a file is a valid GIPSY set
               and will warn you if it is not (program will display
               the corresponding GDS error like: GDS -- bad descriptor 
               header). However, you still can delete these invalid sets.
               The program stores the names of all files that end 
               on '.descr'. This list is necessary if you want to
               use a wildcard expansion using the asterisk character
               '*'. This explains why wildcard expansion can only
               be used in the current directory. If a set (entered
               with INSET=) does not exist, then a warning is displayed
               in your log area. If a set exists, but does not conform
               to the rules for a valid GIPSY set, then a warning
               is displayed in the log area together with the 
               corresponding GDS error, and a warning will be inserted 
               in the OK= prompt. Notice that it is still possible 
               to delete such files. So program DELETE can delete 
               your very important backupless text file 'important.descr'
               if that is what you want.
               
              
Updates:       Jun 15,  1995: VOG, Completely rewritten.