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 #ifdef HAS_STDLIB_H
15 #include <stdlib.h>
16 #endif
17 #include "ss_internal.h"
18 #define size sizeof(ss_data *)
19 #ifdef HAVE_DLOPEN
20 #include <dlfcn.h>
21 #endif
22 #include <errno.h>
23
ss_create_invocation(const char * subsystem_name,const char * version_string,void * info_ptr,ss_request_table * request_table_ptr,int * code_ptr)24 int ss_create_invocation(const char *subsystem_name, const char *version_string,
25 void *info_ptr, ss_request_table *request_table_ptr,
26 int *code_ptr)
27 {
28 register int sci_idx;
29 register ss_data *new_table;
30 register ss_data **table;
31
32 *code_ptr = 0;
33 table = _ss_table;
34 new_table = (ss_data *) malloc(sizeof(ss_data));
35
36 if (table == (ss_data **) NULL) {
37 table = (ss_data **) malloc(2 * size);
38 table[0] = table[1] = (ss_data *)NULL;
39 }
40 initialize_ss_error_table ();
41
42 for (sci_idx = 1; table[sci_idx] != (ss_data *)NULL; sci_idx++)
43 ;
44 table = (ss_data **) realloc((char *)table,
45 ((unsigned)sci_idx+2)*size);
46 if (table == NULL) {
47 *code_ptr = errno;
48 return 0;
49 }
50 table[sci_idx+1] = (ss_data *) NULL;
51 table[sci_idx] = new_table;
52
53 new_table->subsystem_name = subsystem_name;
54 new_table->subsystem_version = version_string;
55 new_table->argv = (char **)NULL;
56 new_table->current_request = (char *)NULL;
57 new_table->info_dirs = (char **)malloc(sizeof(char *));
58 *new_table->info_dirs = (char *)NULL;
59 new_table->info_ptr = info_ptr;
60 new_table->prompt = malloc((unsigned)strlen(subsystem_name)+4);
61 strcpy(new_table->prompt, subsystem_name);
62 strcat(new_table->prompt, ": ");
63 #ifdef silly
64 new_table->abbrev_info = ss_abbrev_initialize("/etc/passwd", code_ptr);
65 #else
66 new_table->abbrev_info = NULL;
67 #endif
68 new_table->flags.escape_disabled = 0;
69 new_table->flags.abbrevs_disabled = 0;
70 new_table->rqt_tables =
71 (ss_request_table **) calloc(2, sizeof(ss_request_table *));
72 *(new_table->rqt_tables) = request_table_ptr;
73 *(new_table->rqt_tables+1) = (ss_request_table *) NULL;
74
75 new_table->readline_handle = 0;
76 new_table->readline_shutdown = 0;
77 new_table->readline = 0;
78 new_table->add_history = 0;
79 new_table->redisplay = 0;
80 new_table->rl_completion_matches = 0;
81 _ss_table = table;
82 #if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
83 ss_get_readline(sci_idx);
84 #endif
85 return(sci_idx);
86 }
87
88 void
ss_delete_invocation(int sci_idx)89 ss_delete_invocation(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 }
106