1 files changed, 148 insertions, 0 deletions
diff --git a/lib/libss/help.c b/lib/libss/help.c
new file mode 100644
index 0000000..078224d
--- /dev/null
+++ b/lib/libss/help.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright 1987, 1988 by MIT Student Information Processing Board
+ *
+ * For copyright info, see copyright.h.
+ */
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "ss_internal.h"
+#include "copyright.h"
+
+extern int errno;
+
+void ss_help (argc, argv, sci_idx, info_ptr)
+    int argc;
+    char const * const *argv;
+    int sci_idx;
+    pointer info_ptr;
+{
+    char buffer[MAXPATHLEN];
+    char const *request_name;
+    int code;
+    int fd, child;
+    register int idx;
+    register ss_data *info;
+
+    request_name = ss_current_request(sci_idx, &code);
+    if (code != 0) {
+	ss_perror(sci_idx, code, "");
+	return;		/* no ss_abort_line, if invalid invocation */
+    }
+    if (argc == 1) {
+	ss_list_requests(argc, argv, sci_idx, info_ptr);
+	return;
+    }
+    else if (argc != 2) {
+	/* should do something better than this */
+	sprintf(buffer, "usage:\n\t%s [topic|command]\nor\t%s\n",
+		request_name, request_name);
+	ss_perror(sci_idx, 0, buffer);
+	return;
+    }
+    info = ss_info(sci_idx);
+    if (info->info_dirs == (char **)NULL) {
+	ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
+	return;
+    }
+    if (info->info_dirs[0] == (char *)NULL) {
+	ss_perror(sci_idx, SS_ET_NO_INFO_DIR, (char *)NULL);
+	return;
+    }
+    for (idx = 0; info->info_dirs[idx] != (char *)NULL; idx++) {
+	(void) strcpy(buffer, info->info_dirs[idx]);
+	(void) strcat(buffer, "/");
+	(void) strcat(buffer, argv[1]);
+	(void) strcat(buffer, ".info");
+	if ((fd = open(&buffer[0], O_RDONLY, 0)) >= 0) goto got_it;
+    }
+    if ((fd = open(&buffer[0], O_RDONLY, 0)) < 0) {
+	char buf[MAXPATHLEN];
+	strcpy(buf, "No info found for ");
+	strcat(buf, argv[1]);
+	ss_perror(sci_idx, 0, buf);
+	return;
+    }
+got_it:
+    switch (child = fork()) {
+    case -1:
+	ss_perror(sci_idx, errno, "Can't fork for pager");
+	return;
+    case 0:
+	(void) dup2(fd, 0); /* put file on stdin */
+	ss_page_stdin();
+    default:
+	(void) close(fd); /* what can we do if it fails? */
+#ifndef POSIX
+	while (wait((union wait *)NULL) != child)
+#else
+	while (wait((int *)NULL) != child)
+#endif
+	{
+	    /* do nothing if wrong pid */
+	};
+    }
+}
+
+void ss_add_info_dir(sci_idx, info_dir, code_ptr)
+    int sci_idx;
+    char *info_dir;
+    int *code_ptr;
+{
+    register ss_data *info;
+    DIR *d;
+    int n_dirs;
+    register char **dirs;
+
+    info = ss_info(sci_idx);
+    if (info_dir == NULL && *info_dir) {
+	*code_ptr = SS_ET_NO_INFO_DIR;
+	return;
+    }
+    if ((d = opendir(info_dir)) == (DIR *)NULL) {
+	*code_ptr = errno;
+	return;
+    }
+    closedir(d);
+    dirs = info->info_dirs;
+    for (n_dirs = 0; dirs[n_dirs] != (char *)NULL; n_dirs++)
+	;		/* get number of non-NULL dir entries */
+    dirs = (char **)reallocf((char *)dirs,
+			    (unsigned)(n_dirs + 2)*sizeof(char *));
+    if (dirs == (char **)NULL) {
+	info->info_dirs = (char **)NULL;
+	*code_ptr = errno;
+	return;
+    }
+    info->info_dirs = dirs;
+    dirs[n_dirs + 1] = (char *)NULL;
+    dirs[n_dirs] = malloc((unsigned)strlen(info_dir)+1);
+    strcpy(dirs[n_dirs], info_dir);
+    *code_ptr = 0;
+}
+
+void ss_delete_info_dir(sci_idx, info_dir, code_ptr)
+    int sci_idx;
+    char *info_dir;
+    int *code_ptr;
+{
+    register char **i_d;
+    register char **info_dirs;
+
+    info_dirs = ss_info(sci_idx)->info_dirs;
+    for (i_d = info_dirs; *i_d; i_d++) {
+	if (!strcmp(*i_d, info_dir)) {
+	    while (*i_d) {
+		*i_d = *(i_d+1);
+		i_d++;
+	    }
+	    *code_ptr = 0;
+	    return;
+	}
+    }
+    *code_ptr = SS_ET_NO_INFO_DIR;
+}