1 files changed, 67 insertions, 0 deletions
diff --git a/ports/unix/guts/getcwd.c b/ports/unix/guts/getcwd.c
new file mode 100644
index 0000000..b3f552c
--- /dev/null
+++ b/ports/unix/guts/getcwd.c
@@ -0,0 +1,67 @@
+/* 
+ * Copyright (c) 2008-2010 Wind River Systems; see
+ * guts/COPYRIGHT for information.
+ *
+ * static char *
+ * wrap_getcwd(char *buf, size_t size) {
+ *	char * rc = NULL;
+ */
+	pseudo_debug(3, "wrap_getcwd: %p, %lu\n",
+		(void *) buf, (unsigned long) size);
+	if (!pseudo_cwd) {
+		pseudo_diag("Asked for CWD, but don't have it!\n");
+		errno = EACCES;
+		return NULL;
+	}
+	/* emulate Linux semantics in case of non-Linux systems. */
+	if (!buf) {
+		/* if we don't have a cwd, something's very wrong... */
+		if (!size) {
+			size = pseudo_cwd_len + 1;
+			if (pseudo_chroot_len && size >= pseudo_chroot_len &&
+				!memcmp(pseudo_cwd, pseudo_chroot, pseudo_chroot_len)) {
+				size -= pseudo_chroot_len;	
+				/* if cwd is precisely the same as chroot, we
+				 * actually want a /, not an empty string
+				 */
+				if (size < 2)
+					size = 2;
+			}
+		}
+		if (size) {
+			buf = malloc(size);
+		} else {
+			pseudo_diag("can't figure out CWD: length %ld + 1 - %ld => %ld\n",
+				(unsigned long) pseudo_cwd_len,
+				(unsigned long) pseudo_chroot_len,
+				(unsigned long) size);
+		}
+		if (!buf) {
+			pseudo_diag("couldn't allocate requested CWD buffer - need %ld byes\n",
+				(unsigned long) size);
+			errno = ENOMEM;
+			return NULL;
+		}
+	}
+	if (pseudo_cwd_len - (pseudo_cwd_rel - pseudo_cwd) >= size) {
+		pseudo_debug(1, "only %ld bytes available, need %ld (%ld + 1 - %ld)\n",
+			(unsigned long) size,
+			(unsigned long) pseudo_cwd_len + 1 - pseudo_chroot_len,
+			(unsigned long) pseudo_cwd_len,
+			(unsigned long) pseudo_chroot_len);
+		errno = ERANGE;
+		return NULL;
+	}
+	rc = buf;
+	pseudo_debug(3, "getcwd: copying %d (%d + 1 - %d) characters from <%s>.\n",
+		(int) ((pseudo_cwd_len + 1) - pseudo_chroot_len),
+		(int) pseudo_cwd_len, (int) pseudo_chroot_len,
+		pseudo_cwd_rel);
+	memcpy(buf, pseudo_cwd_rel, (pseudo_cwd_len + 1) - (pseudo_cwd_rel - pseudo_cwd));
+	if (!*buf) {
+		strcpy(buf, "/");
+	}
+
+/*	return rc;
+ * }
+ */