Adding upstream version 1.47.0.upstream/1.47.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 229 insertions, 0 deletions

diff --git a/lib/ss/execute_cmd.c b/lib/ss/execute_cmd.c
new file mode 100644
index 0000000..d092134
--- /dev/null
+++ b/lib/ss/execute_cmd.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright 1987, 1988, 1989 by Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose is hereby granted, provided that
+ * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  M.I.T. and the
+ * M.I.T. S.I.P.B. make no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without
+ * express or implied warranty.
+ */
+
+#include "config.h"
+#ifdef HAS_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include "ss_internal.h"
+#include <stdio.h>
+
+static int check_request_table PROTOTYPE((ss_request_table *rqtbl, int argc,
+					  char *argv[], int sci_idx));
+static int really_execute_command PROTOTYPE((int sci_idx, int argc,
+					     char **argv[]));
+
+/*
+ * get_request(tbl, idx)
+ *
+ * Function:
+ *      Gets the idx'th request from the request table pointed to
+ *      by tbl.
+ * Arguments:
+ *      tbl (ss_request_table *)
+ *              pointer to request table
+ *      idx (int)
+ *              index into table
+ * Returns:
+ *      (ss_request_entry *)
+ *              pointer to request table entry
+ * Notes:
+ *      Has been replaced by a macro.
+ */
+
+#ifdef __SABER__
+/* sigh.  saber won't deal with pointer-to-const-struct */
+static struct _ss_request_entry * get_request (tbl, idx)
+    ss_request_table * tbl;
+    int idx;
+{
+    struct _ss_request_table *tbl1 = (struct _ss_request_table *) tbl;
+    struct _ss_request_entry *e = (struct _ss_request_entry *) tbl1->requests;
+    return e + idx;
+}
+#else
+#define get_request(tbl,idx)    ((tbl) -> requests + (idx))
+#endif
+
+/*
+ * check_request_table(rqtbl, argc, argv, sci_idx)
+ *
+ * Function:
+ *      If the command string in argv[0] is in the request table, execute
+ *      the commands and return error code 0.  Otherwise, return error
+ *      code ss_et_command_not_found.
+ * Arguments:
+ *      rqtbl (ss_request_table *)
+ *              pointer to request table
+ *      argc (int)
+ *              number of elements in argv[]
+ *      argv (char *[])
+ *              argument string array
+ *      sci_idx (int)
+ *              ss-internal index for subsystem control info structure
+ * Returns:
+ *      (int)
+ *              zero if command found, ss_et_command_not_found otherwise
+ * Notes:
+ */
+
+static int check_request_table(register ss_request_table *rqtbl, int argc,
+			       char *argv[], int sci_idx)
+{
+#ifdef __SABER__
+    struct _ss_request_entry *request;
+#else
+    register ss_request_entry *request;
+#endif
+    register ss_data *info;
+    register char const * const * name;
+    char *string = argv[0];
+    int i;
+
+    info = ss_info(sci_idx);
+    info->argc = argc;
+    info->argv = argv;
+    for (i = 0; (request = get_request(rqtbl, i))->command_names; i++) {
+	for (name = request->command_names; *name; name++)
+	    if (!strcmp(*name, string)) {
+		info->current_request = request->command_names[0];
+		(request->function)(argc, (const char *const *) argv,
+				    sci_idx,info->info_ptr);
+		info->current_request = (char *)NULL;
+		return(0);
+	    }
+    }
+    return(SS_ET_COMMAND_NOT_FOUND);
+}
+
+/*
+ * really_execute_command(sci_idx, argc, argv)
+ *
+ * Function:
+ *      Fills in the argc, argv values in the subsystem entry and
+ *      call the appropriate routine.
+ * Arguments:
+ *      sci_idx (int)
+ *              ss-internal index for subsystem control info structure
+ *      argc (int)
+ *              number of arguments in argument list
+ *      argv (char **[])
+ *              pointer to parsed argument list (may be reallocated
+ *              on abbrev expansion)
+ *
+ * Returns:
+ *      (int)
+ *              Zero if successful, ss_et_command_not_found otherwise.
+ * Notes:
+ */
+
+static int really_execute_command(int sci_idx, int argc, char **argv[])
+{
+    register ss_request_table **rqtbl;
+    register ss_data *info;
+
+    info = ss_info(sci_idx);
+
+    for (rqtbl = info->rqt_tables; *rqtbl; rqtbl++) {
+        if (check_request_table (*rqtbl, argc, *argv, sci_idx) == 0)
+            return(0);
+    }
+    return(SS_ET_COMMAND_NOT_FOUND);
+}
+
+/*
+ * ss_execute_command(sci_idx, argv)
+ *
+ * Function:
+ *	Executes a parsed command list within the subsystem.
+ * Arguments:
+ *	sci_idx (int)
+ *		ss-internal index for subsystem control info structure
+ *	argv (char *[])
+ *		parsed argument list
+ * Returns:
+ *	(int)
+ *		Zero if successful, ss_et_command_not_found otherwise.
+ * Notes:
+ */
+
+int ss_execute_command(int sci_idx, register char *argv[])
+{
+	register int i, argc;
+	char **argp;
+
+	argc = 0;
+	for (argp = argv; *argp; argp++)
+		argc++;
+	argp = (char **)malloc((argc+1)*sizeof(char *));
+	if (!argp)
+		return(ENOMEM);
+	for (i = 0; i <= argc; i++)
+		argp[i] = argv[i];
+	i = really_execute_command(sci_idx, argc, &argp);
+	free(argp);
+	return(i);
+}
+
+/*
+ * ss_execute_line(sci_idx, line_ptr)
+ *
+ * Function:
+ *      Parses and executes a command line within a subsystem.
+ * Arguments:
+ *      sci_idx (int)
+ *              ss-internal index for subsystem control info structure
+ *      line_ptr (char *)
+ *              Pointer to command line to be parsed.
+ * Returns:
+ *      (int)
+ *      	Error code.
+ * Notes:
+ */
+
+int ss_execute_line(int sci_idx, char *line_ptr)
+{
+    char **argv;
+    int argc, ret;
+
+    /* flush leading whitespace */
+    while (line_ptr[0] == ' ' || line_ptr[0] == '\t')
+        line_ptr++;
+
+    /* check if it should be sent to operating system for execution */
+    if (*line_ptr == '!') {
+        if (ss_info(sci_idx)->flags.escape_disabled)
+            return SS_ET_ESCAPE_DISABLED;
+        else {
+            line_ptr++;
+            return (system(line_ptr) < 0) ? errno : 0;
+        }
+    }
+
+    /* parse it */
+    argv = ss_parse(sci_idx, line_ptr, &argc);
+    if (argc == 0) {
+	free(argv);
+        return 0;
+    }
+
+    /* look it up in the request tables, execute if found */
+    ret = really_execute_command (sci_idx, argc, &argv);
+
+    free(argv);
+
+    return(ret);
+}