check allocation and return some other error codes too

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@8291 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/sl/ss.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998 Kungliga Tekniska H<>gskolan
+ * Copyright (c) 1998 - 2000 Kungliga Tekniska H<>gskolan
  * (Royal Institute of Technology, Stockholm, Sweden). 
  * All rights reserved. 
  *
@@ -55,14 +55,34 @@ ss_create_invocation(const char *subsystem,
 		     int *code)
 {
     struct ss_subst *ss;
+
     if(num_subsystems >= sizeof(subsystems) / sizeof(subsystems[0])) {
 	*code = 17;
 	return 0;
     }
     ss = &subsystems[num_subsystems];
-    ss->name = subsystem ? strdup(subsystem) : NULL;
-    ss->version = version ? strdup(version) : NULL;
-    ss->info = info ? strdup(info) : NULL;
+    ss->name = ss->version = ss->info = NULL;
+    if (subsystem != NULL) {
+	ss->name = strdup (subsystem);
+	if (ss->name == NULL) {
+	    *code = ENOMEM;
+	    return 0;
+	}
+    }
+    if (version != NULL) {
+	ss->version = strdup (version);
+	if (ss->version == NULL) {
+	    *code = ENOMEM;
+	    return 0;
+	}
+    }
+    if (info != NULL) {
+	ss->info = strdup (info);
+	if (ss->info == NULL) {
+	    *code = ENOMEM;
+	    return 0;
+	}
+    }
     ss->table = table;
     *code = 0;
     return num_subsystems++;
@@ -87,8 +107,12 @@ int
 ss_execute_command(int index, char **argv)
 {
     int argc = 0;
+    int ret;
+
     while(argv[argc++]);
-    sl_command(subsystems[index].table, argc, argv);
+    ret = sl_command(subsystems[index].table, argc, argv);
+    if (ret == SL_BADCOMMAND)
+	return SS_ET_COMMAND_NOT_FOUND;
     return 0;
 }
 
@@ -98,10 +122,15 @@ ss_execute_line (int index, const char *line)
     char *buf = strdup(line);
     int argc;
     char **argv;
+    int ret;
     
+    if (buf == NULL)
+	return ENOMEM;
     sl_make_argv(buf, &argc, &argv);
-    sl_command(subsystems[index].table, argc, argv);
+    ret = sl_command(subsystems[index].table, argc, argv);
     free(buf);
+    if (ret == SL_BADCOMMAND)
+	return SS_ET_COMMAND_NOT_FOUND;
     return 0;
 }
 
@@ -109,9 +138,9 @@ int
 ss_listen (int index)
 {
     char *prompt = malloc(strlen(subsystems[index].name) + 3);
-    if(prompt == NULL) {
-	abort();
-    }
+    if (prompt = NULL)
+	return ENOMEM;
+
     strcpy(prompt, subsystems[index].name);
     strcat(prompt, ": ");
     sl_loop(subsystems[index].table, prompt);