1 files changed, 59 insertions, 0 deletions
diff --git a/lib/mlibc/tests/ansi/fopen.c b/lib/mlibc/tests/ansi/fopen.c
new file mode 100644
index 0000000..f4818b2
--- /dev/null
+++ b/lib/mlibc/tests/ansi/fopen.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+
+#ifdef USE_HOST_LIBC
+#define TEST_FILE "fopen-host-libc.tmp"
+#else
+#define TEST_FILE "fopen.tmp"
+#endif
+
+int main() {
+	FILE *file;
+	char str[] = "mlibc fopen test";
+	char str2[] = " mlibc appending";
+	char completestr[] = "mlibc fopen test mlibc appending";
+	char buffer[100];
+	char buffer2[100];
+
+	// Clear all the buffers to zero.
+	memset(buffer, 0, sizeof(buffer));
+	memset(buffer2, 0, sizeof(buffer2));
+
+	// Open the file for writing.
+	file = fopen(TEST_FILE, "w");
+	assert(file);
+
+	// Write string minus null terminator, flush and close.
+	fwrite(str, 1, sizeof(str) - 1, file);
+	fflush(file);
+	fclose(file);
+
+	// Open the file for reading.
+	file = fopen(TEST_FILE, "r");
+	assert(file);
+
+	// Verify that we read back the written string and close the file.
+	assert(fread(buffer, 1, sizeof(str) - 1, file));
+	assert(!strcmp(buffer, str));
+	fclose(file);
+
+	// Open the file in appending mode, append string 2 (minus the null terminator) to the file, flush and close.
+	file = fopen(TEST_FILE, "a");
+	fwrite(str2, 1, sizeof(str2) - 1, file);
+	fflush(file);
+	fclose(file);
+
+	// Open the file for reading again, verify the contents, close the file and return.
+	file = fopen(TEST_FILE, "r");
+	assert(fread(buffer2, 1, sizeof(completestr) - 1, file));
+	assert(!strcmp(buffer2, completestr));
+	fclose(file);
+
+	// Check that stdout, stdin and stderr can be closed by the application (issue #12).
+	fclose(stdout);
+	fclose(stdin);
+	fclose(stderr);
+
+	return 0;
+}