1 files changed, 47 insertions, 0 deletions
diff --git a/ch8/8-02_syscalls.h b/ch8/8-02_syscalls.h
new file mode 100644
index 0000000..728c5af
--- /dev/null
+++ b/ch8/8-02_syscalls.h
@@ -0,0 +1,47 @@
+/* 8-02_syscalls.h
+ *
+ * A simpler stdio.h to aid in exercises 8-2
+ */
+
+long lseek(int fd, long offset, int origin);
+
+struct _flags {
+	unsigned int _READ : 1;
+	unsigned int _WRITE : 1;
+	unsigned int _UNBUF : 1;
+	unsigned int _EOF : 1;
+	unsigned int _ERR : 1;
+} flags;
+
+typedef struct _iobuf {
+	int cnt;
+	char *ptr;
+	char *base;
+	struct _flags flags;
+	int fd;
+} my_FILE;
+
+my_FILE _iob[FOPEN_MAX] = {
+	/* stdin is read-only */
+	{ 0, (char *) 0, (char *) 0, {1, 0, 0, 0, 0}, 0 },
+	/* stdout is write only */
+	{ 0, (char *) 0, (char *) 0, {0, 1, 0, 0, 0}, 1 },
+	/* stderr is written AND not buffered */
+	{ 0, (char *) 0, (char *) 0, {0, 1, 1, 0, 0}, 2 }
+};
+
+#define feof(p) (((p)->flags._EOF) != 0)
+#define ferror(p) (((p)->flags._ERR) != 0)
+#define fileno(p) ((p)->fd)
+#define my_getc(p) (--(p)->cnt >= 0 ? (unsigned char) *(p)->ptr++ : my__fillbuf(p))
+#define getchar() getc(stdin)
+
+int my_fempty(struct _flags flags) {
+	if (!flags._READ && !flags._WRITE && !flags._UNBUF && !flags._EOF && !flags._ERR) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
+
+int my_fclose(my_FILE*);