README: Add warnings about file contents being deleted

main.c: make an error being output to stderr instead of stdout
EinBaum · Mar 10, 2018 · 1cc715d · 1cc715d
1 parent 65faf19
commit 1cc715d
Show file tree

Hide file tree

Showing 4 changed files with 11 additions and 3 deletions.
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 EinBaum
+Copyright (c) 2017-2018 EinBaum
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

diff --git a/README.base b/README.base
@@ -20,3 +20,7 @@ cat spag.c | spaghetti -d > main2.c
 # Same as above
 spaghetti -d -i spag.c -o main2.c
 ```
+
+Warning #1: The output file is either created or cleared if it exists. Previous contents are lost!
+
+Warning #2: Do not use a file as both input and output file. The file contents will be deleted before the file can be spaghettified.
diff --git a/README.md b/README.md
@@ -71,3 +71,7 @@ cat spag.c | spaghetti -d > main2.c
 # Same as above
 spaghetti -d -i spag.c -o main2.c
 ```
+
+Warning #1: The output file is either created or cleared if it exists. Previous contents are lost!
+
+Warning #2: Do not use a file as both input and output file. The file contents will be deleted before the file can be spaghettified.
diff --git a/main.c b/main.c
@@ -107,8 +107,8 @@ int main(int argc, char **argv) {
 
 	int selected = (opt_print + opt_spaghettify + opt_despaghettify);
 	if (selected > 1) {
-		printf("Too many options selected\n");
-		exit(0);
+		fprintf(stderr, "Too many options selected\n");
+		exit(1);
 	} else if (selected == 0) {
 		opt_spaghettify = 1;
 	}