1 files changed, 128 insertions, 0 deletions
diff --git a/lib/sh/makepath.c b/lib/sh/makepath.c
new file mode 100644
index 0000000..ab46c96
--- /dev/null
+++ b/lib/sh/makepath.c
@@ -0,0 +1,128 @@
+/* makepath.c - glue PATH and DIR together into a full pathname. */
+
+/* Copyright (C) 1987-2020 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Bash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include <bashansi.h>
+#include "shell.h"
+
+#include <tilde/tilde.h>
+
+#ifndef NULL
+#  define NULL 0
+#endif
+
+/* MAKE SURE THESE AGREE WITH ../../externs.h. */
+
+#ifndef MP_DOTILDE
+#  define MP_DOTILDE	0x01
+#  define MP_DOCWD	0x02
+#  define MP_RMDOT	0x04
+#  define MP_IGNDOT	0x08
+#endif
+
+extern char *get_working_directory PARAMS((char *));
+
+static char *nullpath = "";
+
+/* Take PATH, an element from, e.g., $CDPATH, and DIR, a directory name,
+   and paste them together into PATH/DIR.  Tilde expansion is performed on
+   PATH if (flags & MP_DOTILDE) is non-zero.  If PATH is NULL or the empty
+   string, it is converted to the current directory.  A full pathname is
+   used if (flags & MP_DOCWD) is non-zero, otherwise `./' is used.  If
+   (flags & MP_RMDOT) is non-zero, any `./' is removed from the beginning
+   of DIR.  If (flags & MP_IGNDOT) is non-zero, a PATH that is "." or "./"
+   is ignored. */
+
+#define MAKEDOT() \
+  do { \
+    xpath = (char *)xmalloc (2); \
+    xpath[0] = '.'; \
+    xpath[1] = '\0'; \
+    pathlen = 1; \
+  } while (0)
+
+char *
+sh_makepath (path, dir, flags)
+     const char *path, *dir;
+     int flags;
+{
+  int dirlen, pathlen;
+  char *ret, *xpath, *xdir, *r, *s;
+
+  if (path == 0 || *path == '\0')
+    {
+      if (flags & MP_DOCWD)
+	{
+	  xpath = get_working_directory ("sh_makepath");
+	  if (xpath == 0)
+	    {
+	      ret = get_string_value ("PWD");
+	      if (ret)
+		xpath = savestring (ret);
+	    }
+	  if (xpath == 0)
+	    MAKEDOT();
+	  else
+	    pathlen = strlen (xpath);
+	}
+      else
+	MAKEDOT();
+    }
+  else if ((flags & MP_IGNDOT) && path[0] == '.' && (path[1] == '\0' ||
+						     (path[1] == '/' && path[2] == '\0')))
+    {
+      xpath = nullpath;
+      pathlen = 0;
+    }
+  else
+    {
+      xpath = ((flags & MP_DOTILDE) && *path == '~') ? bash_tilde_expand (path, 0) : (char *)path;
+      pathlen = strlen (xpath);
+    }
+
+  xdir = (char *)dir;
+  dirlen = strlen (xdir);
+  if ((flags & MP_RMDOT) && dir[0] == '.' && dir[1] == '/')
+    {
+      xdir += 2;
+      dirlen -= 2;
+    }
+
+  r = ret = (char *)xmalloc (2 + dirlen + pathlen);
+  s = xpath;
+  while (*s)
+    *r++ = *s++;
+  if (s > xpath && s[-1] != '/')
+    *r++ = '/';      
+  s = xdir;
+  while (*r++ = *s++)
+    ;
+  if (xpath != path && xpath != nullpath)
+    free (xpath);
+  return (ret);
+}