invocation.c revision e46c187aa6ee1ad6f38f0fb9c39da5e2bb6ceeb9 
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#include <errno.h>
24
25int ss_create_invocation(subsystem_name, version_string, info_ptr,
26			 request_table_ptr, code_ptr)
27	const char *subsystem_name, *version_string;
28	void *info_ptr;
29	ss_request_table *request_table_ptr;
30	int *code_ptr;
31{
32	register int sci_idx;
33	register ss_data *new_table;
34	register ss_data **table;
35
36	*code_ptr = 0;
37	table = _ss_table;
38	new_table = (ss_data *) malloc(sizeof(ss_data));
39
40	if (table == (ss_data **) NULL) {
41		table = (ss_data **) malloc(2 * size);
42		table[0] = table[1] = (ss_data *)NULL;
43	}
44	initialize_ss_error_table ();
45
46	for (sci_idx = 1; table[sci_idx] != (ss_data *)NULL; sci_idx++)
47		;
48	table = (ss_data **) realloc((char *)table,
49				     ((unsigned)sci_idx+2)*size);
50	if (table == NULL) {
51		*code_ptr = errno;
52		return 0;
53	}
54	table[sci_idx+1] = (ss_data *) NULL;
55	table[sci_idx] = new_table;
56
57	new_table->subsystem_name = subsystem_name;
58	new_table->subsystem_version = version_string;
59	new_table->argv = (char **)NULL;
60	new_table->current_request = (char *)NULL;
61	new_table->info_dirs = (char **)malloc(sizeof(char *));
62	*new_table->info_dirs = (char *)NULL;
63	new_table->info_ptr = info_ptr;
64	new_table->prompt = malloc((unsigned)strlen(subsystem_name)+4);
65	strcpy(new_table->prompt, subsystem_name);
66	strcat(new_table->prompt, ":  ");
67#ifdef silly
68	new_table->abbrev_info = ss_abbrev_initialize("/etc/passwd", code_ptr);
69#else
70	new_table->abbrev_info = NULL;
71#endif
72	new_table->flags.escape_disabled = 0;
73	new_table->flags.abbrevs_disabled = 0;
74	new_table->rqt_tables =
75		(ss_request_table **) calloc(2, sizeof(ss_request_table *));
76	*(new_table->rqt_tables) = request_table_ptr;
77	*(new_table->rqt_tables+1) = (ss_request_table *) NULL;
78
79	new_table->readline_handle = 0;
80	new_table->readline_shutdown = 0;
81	new_table->readline = 0;
82	new_table->add_history = 0;
83	new_table->redisplay = 0;
84	new_table->rl_completion_matches = 0;
85	_ss_table = table;
86#if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
87	ss_get_readline(sci_idx);
88#endif
89	return(sci_idx);
90}
91
92void
93ss_delete_invocation(sci_idx)
94	int sci_idx;
95{
96	register ss_data *t;
97	int ignored_code;
98
99	t = ss_info(sci_idx);
100	free(t->prompt);
101	free(t->rqt_tables);
102	while(t->info_dirs[0] != (char *)NULL)
103		ss_delete_info_dir(sci_idx, t->info_dirs[0], &ignored_code);
104	free(t->info_dirs);
105#if defined(HAVE_DLOPEN) && defined(SHARED_ELF_LIB)
106	if (t->readline_shutdown)
107		(*t->readline_shutdown)(t);
108#endif
109	free(t);
110}
111