1 files changed, 170 insertions, 0 deletions
diff --git a/unixio.c b/unixio.c
new file mode 100644
index 0000000..ec235b9
--- /dev/null
+++ b/unixio.c
@@ -0,0 +1,170 @@
+/*********************************************************************/
+/*                                                                   */
+/*  This Program Written By Paul Edwards.                            */
+/*  Released to the public domain.                                   */
+/*                                                                   */
+/*********************************************************************/
+/*********************************************************************/
+/*                                                                   */
+/*  unixio - Unix I/O functions written in terms of standard C       */
+/*  functions.                                                       */
+/*                                                                   */
+/*********************************************************************/
+
+#include <stdio.h>
+
+#ifdef fileno
+#undef fileno
+#endif
+
+#include "unixio.h"
+
+static FILE *files[FOPEN_MAX];
+/*char *environ[] = { NULL };*/
+
+int open(const char *fnm, int mode, ...)
+{
+    int x;
+    char *modestr;
+
+    for (x = 3; x < FOPEN_MAX; x++)
+    {
+        if (files[x] == NULL)
+        {
+            break;
+        }
+    }
+    if (x == FOPEN_MAX)
+    {
+        return (-1);
+    }
+    if (mode == O_RDONLY)
+    {
+        modestr = "r";
+    }
+    else if (mode == O_WRONLY)
+    {
+        modestr = "w";
+    }
+    else if (mode == O_RDWR)
+    {
+        modestr = "r+";
+    }
+    files[x] = fopen(fnm, modestr);
+    if (files[x] == NULL)
+    {
+        return (-1);
+    }
+    return (x);
+}
+
+int read(int fno, void *buf, size_t bytes)
+{
+    size_t rb;
+
+    if (fno < 3)
+    {
+        rb = fread(buf, 1, bytes, stdin);
+    }
+    else
+    {
+        rb = fread(buf, 1, bytes, files[fno]);
+    }
+    return ((int)rb);
+}
+
+int write(int fno, const void *buf, size_t bytes)
+{
+    size_t wb = 0;
+
+    if (fno == 1)
+    {
+        wb = fwrite(buf, 1, bytes, stdout);
+    }
+    else if (fno == 2)
+    {
+        wb = fwrite(buf, 1, bytes, stderr);
+    }
+    else if (fno > 2)
+    {
+        wb = fwrite(buf, 1, bytes, files[fno]);
+    }
+    return ((int)wb);
+}
+
+int close(int fno)
+{
+    if (fno >= 3)
+    {
+        fclose(files[fno]);
+        files[fno] = NULL;
+    }
+    return (0);
+}
+
+char *getcwd(char *buf, int len)
+{
+    if (len != 0)
+    {
+        *buf = '\0';
+    }
+    return (buf);
+}
+
+void unlink(char *f)
+{
+    remove(f);
+    return;
+}
+
+int stat(char *f, struct stat *buf)
+{
+    memset(buf, '\0', sizeof *buf);
+    return (0);
+}
+
+int fileno(FILE *fp)
+{
+    return (0);
+}
+
+int access(char *f, int n)
+{
+    return (1);
+}
+
+int fstat(int fh, struct stat *buf)
+{
+    memset(buf, '\0', sizeof *buf);
+    return (0);
+}
+
+int pwait(int a, int *b, int c)
+{
+    return (0);
+}
+
+int putenv(char *x)
+{
+    return (0);
+}
+
+char *mktemp(char *s)
+{
+    return (tmpnam(s));
+}
+
+int chdir(char *path)
+{
+    return (0);
+}
+
+int rmdir(char *path)
+{
+    return (0);
+}
+
+int mkdir(char *path, int permissions)
+{
+    return (0);
+}