1 files changed, 57 insertions, 0 deletions
diff --git a/unix/os/zfchdr.c b/unix/os/zfchdr.c
new file mode 100644
index 00000000..3beae679
--- /dev/null
+++ b/unix/os/zfchdr.c
@@ -0,0 +1,57 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#include <stdio.h>
+#define	import_kernel
+#define	import_knames
+#define import_spp
+#include <iraf.h>
+
+extern	char oscwd[];
+
+
+/* ZFCHDR -- Change the current working directory.  Save directory name,
+ * excluding the trailing "/", in oscwd so that a subsequent call to ZFGCWD
+ * will be able to return directory name without a big hassle.
+ */
+int
+ZFCHDR (
+  PKCHAR  *newdir,
+  XINT	  *status
+)
+{
+	register char *ip, *op;
+	char	dirname[SZ_PATHNAME];
+
+
+	/* Change pathnames like "a/b/c/" to "a/b/c".
+	 */
+	for (ip=(char *)newdir, op=dirname;  (*op = *ip++) != EOS;  op++)
+	    ;
+	if ((*(op-1) == '/') && (op - dirname > 1))
+	    *(op-1) = EOS;
+
+	/* Ask UNIX to change the cwd to newdir.
+	 */
+	if (chdir (dirname) == ERR) {
+	    *status = XERR;
+
+	} else if (dirname[0] == '/') {
+	    /* Save pathname of directory.
+	     */
+	    strcpy (oscwd, dirname);
+	    *status = XOK;
+
+	} else {
+	    /* Concatenate subdir name to current directory pathname.
+	     */
+	    for (op=oscwd;  *op;  op++)
+		;
+	    if (*(op-1) != '/')
+		*op++ = '/';
+	    for (ip=dirname;  (*op++ = *ip++);  )
+		;
+	}
+
+	return (*status);
+}