2 * Copyright 1987, 1988 by MIT Student Information Processing Board
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.
27 #include <sys/param.h>
28 #include <sys/types.h>
30 #ifdef NEED_SYS_FCNTL_H
32 #include <sys/fcntl.h>
34 #ifdef HAVE_SYS_WAIT_H
37 #include "ss_internal.h"
39 void ss_help (argc, argv, sci_idx, info_ptr)
41 char const * const *argv;
46 char const *request_name;
50 register ss_data *info;
52 request_name = ss_current_request(sci_idx, &code);
54 ss_perror(sci_idx, code, "");
55 return; /* no ss_abort_line, if invalid invocation */
58 ss_list_requests(argc, argv, sci_idx, info_ptr);
62 /* should do something better than this */
63 buffer = malloc(80+2*strlen(request_name));
66 "couldn't allocate memory to print usage message");
69 sprintf(buffer, "usage:\n\t%s [topic|command]\nor\t%s\n",
70 request_name, request_name);
71 ss_perror(sci_idx, 0, buffer);
75 info = ss_info(sci_idx);
76 if (info->info_dirs == (char **)NULL) {
77 ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
80 if (info->info_dirs[0] == (char *)NULL) {
81 ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
84 for (fd = -1, idx = 0; info->info_dirs[idx] != (char *)NULL; idx++) {
85 buffer = malloc(strlen (info->info_dirs[idx]) + 1 +
86 strlen (argv[1]) + 6);
89 "couldn't allocate memory for help filename");
92 (void) strcpy(buffer, info->info_dirs[idx]);
93 (void) strcat(buffer, "/");
94 (void) strcat(buffer, argv[1]);
95 (void) strcat(buffer, ".info");
96 fd = open(buffer, O_RDONLY);
102 #define MSG "No info found for "
103 char *buf = malloc(strlen (MSG) + strlen (argv[1]) + 1);
105 strcat(buf, argv[1]);
106 ss_perror(sci_idx, 0, buf);
110 switch (child = fork()) {
112 ss_perror(sci_idx, errno, "Can't fork for pager");
115 (void) dup2(fd, 0); /* put file on stdin */
118 (void) close(fd); /* what can we do if it fails? */
119 while (wait(0) != child) {
120 /* do nothing if wrong pid */
125 #ifndef HAVE_DIRENT_H
131 void ss_add_info_dir(sci_idx, info_dir, code_ptr)
136 register ss_data *info;
139 register char **dirs;
141 info = ss_info(sci_idx);
142 if (info_dir == NULL || *info_dir == '\0') {
143 *code_ptr = SS_ET_NO_INFO_DIR;
146 if ((d = opendir(info_dir)) == (DIR *)NULL) {
151 dirs = info->info_dirs;
152 for (n_dirs = 0; dirs[n_dirs] != (char *)NULL; n_dirs++)
153 ; /* get number of non-NULL dir entries */
154 dirs = (char **)realloc((char *)dirs,
155 (unsigned)(n_dirs + 2)*sizeof(char *));
156 if (dirs == (char **)NULL) {
157 info->info_dirs = (char **)NULL;
161 info->info_dirs = dirs;
162 dirs[n_dirs + 1] = (char *)NULL;
163 dirs[n_dirs] = malloc((unsigned)strlen(info_dir)+1);
164 strcpy(dirs[n_dirs], info_dir);
168 void ss_delete_info_dir(sci_idx, info_dir, code_ptr)
174 register char **info_dirs;
176 info_dirs = ss_info(sci_idx)->info_dirs;
177 for (i_d = info_dirs; *i_d; i_d++) {
178 if (!strcmp(*i_d, info_dir)) {
187 *code_ptr = SS_ET_NO_INFO_DIR;