From 8aa5ec317af49d811b1c4b65c905cca81f845321 Mon Sep 17 00:00:00 2001
From: Thomas Guyot-Sionnest <dermoth@users.sourceforge.net>
Date: Sun, 30 Mar 2008 14:02:13 +0000
Subject: - Remove the last argument of np_extra_opts - Code cleanups and
 comments

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1967 f882894a-f735-0410-b71e-b25c423dba1c

diff --git a/lib/extra_opts.c b/lib/extra_opts.c
index 3a0ce04..2aeb77a 100644
--- a/lib/extra_opts.c
+++ b/lib/extra_opts.c
@@ -44,23 +44,18 @@ is_option (char *str)
 }
 
 /* this is the externally visible function used by plugins */
-/* Shouldn't se modify directly **argv (passed as a char ***) and argc
- * (as int *) ?
- */
-char **np_extra_opts(int argc, char **argv, const char *plugin_name, int *argc_new){
-	np_arg_list *extra_args=NULL, *ea_tmp1=NULL, *ea_tmp2=NULL;
+char **np_extra_opts(int *argc, char **argv, const char *plugin_name){
+	np_arg_list *extra_args=NULL, *ea1=NULL, *ea_tmp=NULL;
 	char **argv_new=NULL;
 	char *argptr=NULL;
-	int i, j, optfound, ea_num=argc;
+	int i, j, optfound, argc_new, ea_num=*argc;
 
-	if(argc<2) {
+	if(*argc<2) {
 		/* No arguments provided */
-		*argc_new=argc;
-		argv_new=argv;
-		return argv_new;
+		return argv;
 	}
 
-	for(i=1; i<argc; i++){
+	for(i=1; i<*argc; i++){
 		argptr=NULL;
 		optfound=0;
 
@@ -69,86 +64,76 @@ char **np_extra_opts(int argc, char **argv, const char *plugin_name, int *argc_n
 			/* It is a single argument with value */
 			argptr=argv[i]+13;
 			/* Delete the extra opts argument */
-			for(j=i;j<argc;j++) argv[j]=argv[j+1];
+			for(j=i;j<*argc;j++) argv[j]=argv[j+1];
 			i--;
-			argc--;
+			*argc--;
 		}else if(strcmp(argv[i], "--extra-opts")==0){
 			if(!is_option(argv[i+1])){
 				/* It is a argument with separate value */
 				argptr=argv[i+1];
 				/* Delete the extra-opts argument/value */
-				for(j=i;j<argc-1;j++) argv[j]=argv[j+2];
+				for(j=i;j<*argc-1;j++) argv[j]=argv[j+2];
 				i-=2;
-				argc-=2;
+				*argc-=2;
 				ea_num--;
 			}else{
 				/* It has no value */
 				optfound=1;
 				/* Delete the extra opts argument */
-				for(j=i;j<argc;j++) argv[j]=argv[j+1];
+				for(j=i;j<*argc;j++) argv[j]=argv[j+1];
 				i--;
-				argc--;
+				*argc--;
 			}
 		}
 
+		/* If we found extra-opts, expand them and store them for later*/
 		if(argptr||optfound){
 			/* Process ini section, returning a linked list of arguments */
-			ea_tmp1=np_get_defaults(argptr, plugin_name);
-			if(ea_tmp1==NULL) {
-				/* no extra args? */
+			ea1=np_get_defaults(argptr, plugin_name);
+			if(ea1==NULL) {
+				/* no extra args (empty section)? */
 				ea_num--;
 				continue;
 			}
 
 			/* append the list to extra_args */
 			if(extra_args==NULL){
-				extra_args=ea_tmp2=ea_tmp1;
-				while(ea_tmp2->next) {
-					ea_tmp2=ea_tmp2->next;
-					ea_num++;
-				}
+				extra_args=ea1;
+				while(ea1=ea1->next) ea_num++;
 			}else{
-				ea_tmp2=extra_args;
-				while(ea_tmp2->next) {
-					ea_tmp2=ea_tmp2->next;
-					ea_num++;
-				}
-				ea_tmp2->next=ea_tmp1;
+				ea_tmp=extra_args;
+				while(ea_tmp=ea_tmp->next) ea_num++;
+				ea_tmp->next=ea1;
 			}
-			ea_tmp1=ea_tmp2=NULL;
+			ea1=ea_tmp=NULL;
 		}
 		/* lather, rince, repeat */
 	}
 
-	if(ea_num==argc && extra_args==NULL){
+	if(ea_num==*argc && extra_args==NULL){
 		/* No extra-opts */
-		*argc_new=argc;
-		argv_new=argv;
-		return argv_new;
+		return argv;
 	}
 
-	/* done processing arguments. now create a new argc/argv set... */
+	/* done processing arguments. now create a new argv array... */
 	argv_new=(char**)malloc((ea_num+1)*sizeof(char**));
 	if(argv_new==NULL) die(STATE_UNKNOWN, _("malloc() failed!\n"));
 
-	/* starting with program name (Should we strdup or just use the poiter?) */
+	/* starting with program name */
 	argv_new[0]=strdup(argv[0]);
-	*argc_new=1;
+	argc_new=1;
 	/* then parsed ini opts (frying them up in the same run) */
 	while(extra_args){
-		argv_new[*argc_new]=strdup(extra_args->arg);
-		*argc_new+=1;
-		ea_tmp1=extra_args;
+		argv_new[argc_new++]=extra_args->arg;
+		ea1=extra_args;
 		extra_args=extra_args->next;
-		free(ea_tmp1);
-	}
-	/* finally the rest of the argv array (Should we strdup or just use the poiter?) */
-	for (i=1; i<argc; i++){
-		argv_new[*argc_new]=strdup(argv[i]);
-		*argc_new+=1;
+		free(ea1);
 	}
+	/* finally the rest of the argv array */
+	for (i=1; i<*argc; i++)	argv_new[argc_new++]=strdup(argv[i]);
+	*argc=argc_new;
 	/* and terminate. */
-	argv_new[*argc_new]=NULL;
+	argv_new[argc_new]=NULL;
 
 	return argv_new;
 }
diff --git a/lib/extra_opts.h b/lib/extra_opts.h
index 5f89d2b..25bfc6d 100644
--- a/lib/extra_opts.h
+++ b/lib/extra_opts.h
@@ -7,9 +7,13 @@
  */
 
 /* np_extra_opts: Process the --extra-opts arguments and create a new argument
- * array load the default configuration (if present) for
- * a plugin from the ini file
+ * array with ini-processed and argument-passed arguments together. The
+ * ini-procesed arguments always come first (in the ord of --extra-opts
+ * arguments). If no --extra-opts arguments are provided or returned nothing
+ * it returns **argv otherwise the new array is returned. --extra-opts are
+ * always removed from **argv and the new array and all its elements can be
+ * freed with free();
  */
-char **np_extra_opts(int argc, char **argv, const char *plugin_name, int *argc_new);
+char **np_extra_opts(int *argc, char **argv, const char *plugin_name);
 
 #endif /* _EXTRA_OPTS_H_ */
diff --git a/lib/tests/test_opts.c b/lib/tests/test_opts.c
index 769a2df..7c173f3 100644
--- a/lib/tests/test_opts.c
+++ b/lib/tests/test_opts.c
@@ -57,7 +57,7 @@ int
 main (int argc, char **argv)
 {
 	char **argv_test=NULL, **argv_known=NULL;
-	int i, argc_test, argc_new;
+	int i, argc_test;
 
 	plan_tests(11);
 
@@ -68,9 +68,9 @@ main (int argc, char **argv)
 	argv_known=(char **)realloc(argv_known, 2*sizeof(char **));
 	argv_known[0] = "prog_name";
 	argv_known[1] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 1, argv_known), "No opts, returns correct argv/argc");
-	my_free(&argc_new, argv_test);
+	argv_test=np_extra_opts(&argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 1, argv_known), "No opts, returns correct argv/argc");
+	my_free(&argc_test, argv_test);
 
 	argv_test=(char **)malloc(6*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -87,9 +87,9 @@ main (int argc, char **argv)
 	argv_known[3] = "--arg3";
 	argv_known[4] = "val2";
 	argv_known[5] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 5, argv_known), "No extra opts, verbatim copy of argv");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(&argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 5, argv_known), "No extra opts, verbatim copy of argv");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(3*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -102,9 +102,9 @@ main (int argc, char **argv)
 	argv_known[2] = "--this=Your Mother!";
 	argv_known[3] = "--blank";
 	argv_known[4] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 4, argv_known), "Only extra opts using default section");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(&argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 4, argv_known), "Only extra opts using default section");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(5*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -119,9 +119,9 @@ main (int argc, char **argv)
 	argv_known[2] = "--something else=oops";
 	argv_known[3] = "--this=that";
 	argv_known[4] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 4, argv_known), "Only extra opts specified twice");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 4, argv_known), "Only extra opts specified twice");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(7*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -141,9 +141,9 @@ main (int argc, char **argv)
 	argv_known[5] = "--arg1=val1";
 	argv_known[6] = "--arg2";
 	argv_known[7] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 7, argv_known), "twice extra opts using two sections");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 7, argv_known), "twice extra opts using two sections");
+	my_free(&argc_test,argv_test);
 
 	/* Next three checks should die according to N::P - for now they're useful
 	 * to test code is working properly (i.e. no srash or unexpected behavior)
@@ -162,9 +162,9 @@ main (int argc, char **argv)
 	argv_known[2] = "--arg3";
 	argv_known[3] = "val2";
 	argv_known[4] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_missing", &argc_new);
-	ok(array_diff(argc_new, argv_test, 4, argv_known), "Missing section 1");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_missing");
+	ok(array_diff(argc_test, argv_test, 4, argv_known), "Missing section 1");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(7*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -181,9 +181,9 @@ main (int argc, char **argv)
 	argv_known[2] = "--arg3";
 	argv_known[3] = "val2";
 	argv_known[4] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_missing", &argc_new);
-	ok(array_diff(argc_new, argv_test, 4, argv_known), "Missing section 2");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_missing");
+	ok(array_diff(argc_test, argv_test, 4, argv_known), "Missing section 2");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(6*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -199,9 +199,9 @@ main (int argc, char **argv)
 	argv_known[2] = "--arg3";
 	argv_known[3] = "val2";
 	argv_known[4] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_missing", &argc_new);
-	ok(array_diff(argc_new, argv_test, 4, argv_known), "Missing section 3");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_missing");
+	ok(array_diff(argc_test, argv_test, 4, argv_known), "Missing section 3");
+	my_free(&argc_test,argv_test);
 
 	setenv("NAGIOS_CONFIG_PATH", ".", 1);
 	argv_test=(char **)malloc(6*sizeof(char **));
@@ -219,9 +219,9 @@ main (int argc, char **argv)
 	argv_known[3] = "--arg3";
 	argv_known[4] = "val2";
 	argv_known[5] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 5, argv_known), "Default section 1");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 5, argv_known), "Default section 1");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(6*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -238,9 +238,9 @@ main (int argc, char **argv)
 	argv_known[3] = "--arg3";
 	argv_known[4] = "val2";
 	argv_known[5] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 5, argv_known), "Default section 2");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 5, argv_known), "Default section 2");
+	my_free(&argc_test,argv_test);
 
 	argv_test=(char **)malloc(6*sizeof(char **));
 	argv_test[0] = "prog_name";
@@ -257,9 +257,9 @@ main (int argc, char **argv)
 	argv_known[3] = "--arg3";
 	argv_known[4] = "val2";
 	argv_known[5] = NULL;
-	argv_test=np_extra_opts(argc_test, argv_test, "check_disk", &argc_new);
-	ok(array_diff(argc_new, argv_test, 5, argv_known), "Default section 3");
-	my_free(&argc_new,argv_test);
+	argv_test=np_extra_opts(argc_test, argv_test, "check_disk");
+	ok(array_diff(argc_test, argv_test, 5, argv_known), "Default section 3");
+	my_free(&argc_test,argv_test);
 
 	return exit_status();
 }
-- 
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