lib/ss/invocation.c

   1 /*
   2  * Copyright 1987, 1988 by MIT Student Information Processing Board
   3  *
   4  * Permission to use, copy, modify, and distribute this software and
   5  * its documentation for any purpose is hereby granted, provided that
   6  * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
   7  * advertising or publicity pertaining to distribution of the software
   8  * without specific, written prior permission.  M.I.T. and the
   9  * M.I.T. S.I.P.B. make no representations about the suitability of
  10  * this software for any purpose.  It is provided "as is" without
  11  * express or implied warranty.
  12  */
  13
  14 #include "config.h"
  15 #ifdef HAS_STDLIB_H
  16 #include <stdlib.h>
  17 #endif
  18 #include "ss_internal.h"
  19 #define size    sizeof(ss_data *)
  20 #ifdef HAVE_DLOPEN
  21 #include <dlfcn.h>
  22 #endif
  23
  24 int ss_create_invocation(subsystem_name, version_string, info_ptr,
  25                          request_table_ptr, code_ptr)
  26         const char *subsystem_name, *version_string;
  27         void *info_ptr;
  28         ss_request_table *request_table_ptr;
  29         int *code_ptr;
  30 {
  31         register int sci_idx;
  32         register ss_data *new_table;
  33         register ss_data **table;
  34
  35         *code_ptr = 0;
  36         table = _ss_table;
  37         new_table = (ss_data *) malloc(sizeof(ss_data));
  38
  39         if (table == (ss_data **) NULL) {
  40                 table = (ss_data **) malloc(2 * size);
  41                 table[0] = table[1] = (ss_data *)NULL;
  42         }
  43         initialize_ss_error_table ();
  44
  45         for (sci_idx = 1; table[sci_idx] != (ss_data *)NULL; sci_idx++)
  46                 ;
  47         table = (ss_data **) realloc((char *)table,
  48                                      ((unsigned)sci_idx+2)*size);
  49         table[sci_idx+1] = (ss_data *) NULL;
  50         table[sci_idx] = new_table;
  51
  52         new_table->subsystem_name = subsystem_name;
  53         new_table->subsystem_version = version_string;
  54         new_table->argv = (char **)NULL;
  55         new_table->current_request = (char *)NULL;
  56         new_table->info_dirs = (char **)malloc(sizeof(char *));
  57         *new_table->info_dirs = (char *)NULL;
  58         new_table->info_ptr = info_ptr;
  59         new_table->prompt = malloc((unsigned)strlen(subsystem_name)+4);
  60         strcpy(new_table->prompt, subsystem_name);
  61         strcat(new_table->prompt, ":  ");
  62 #ifdef silly
  63         new_table->abbrev_info = ss_abbrev_initialize("/etc/passwd", code_ptr);
  64 #else
  65         new_table->abbrev_info = NULL;
  66 #endif
  67         new_table->flags.escape_disabled = 0;
  68         new_table->flags.abbrevs_disabled = 0;
  69         new_table->rqt_tables =
  70                 (ss_request_table **) calloc(2, sizeof(ss_request_table *));
  71         *(new_table->rqt_tables) = request_table_ptr;
  72         *(new_table->rqt_tables+1) = (ss_request_table *) NULL;
  73
  74         new_table->readline_handle = 0;
  75         new_table->readline_shutdown = 0;
  76         new_table->readline = 0;
  77         new_table->add_history = 0;
  78         new_table->redisplay = 0;
  79         new_table->rl_completion_matches = 0;
  80         _ss_table = table;
  81 #if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
  82         ss_get_readline(sci_idx);
  83 #endif
  84         return(sci_idx);
  85 }
  86
  87 void
  88 ss_delete_invocation(sci_idx)
  89         int sci_idx;
  90 {
  91         register ss_data *t;
  92         int ignored_code;
  93
  94         t = ss_info(sci_idx);
  95         free(t->prompt);
  96         free(t->rqt_tables);
  97         while(t->info_dirs[0] != (char *)NULL)
  98                 ss_delete_info_dir(sci_idx, t->info_dirs[0], &ignored_code);
  99         free(t->info_dirs);
 100 #if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
 101         if (t->readline_shutdown)
 102                 (*t->readline_shutdown)(t);
 103 #endif
 104         free(t);
 105 }