Fix initdb to reject a relative path for -X (--xlogdir) argument. This

doesn't work, and the real reason why not is it's unclear where the path
is relative to (initdb's CWD, or the data directory?).  We could make an
arbitrary decision, but it seems best to make the user be unambiguous.
Per gripe from Devrim.

diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index abdb4d3f259bbf1848e622f89233ed334c14872b..0fc76f199f23237f4a464618748da51e874f804a 100644 (file)
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -42,7 +42,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  * Portions taken from FreeBSD.
  *
- * $PostgreSQL: pgsql/src/bin/initdb/initdb.c,v 1.152.2.2 2008/02/29 23:31:42 adunstan Exp $
+ * $PostgreSQL: pgsql/src/bin/initdb/initdb.c,v 1.152.2.3 2008/06/02 03:48:07 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -3005,8 +3005,13 @@ main(int argc, char *argv[])
        {
                char       *linkloc;
 
-               linkloc = (char *) pg_malloc(strlen(pg_data) + 8 + 2);
-               sprintf(linkloc, "%s/pg_xlog", pg_data);
+               /* clean up xlog directory name, check it's absolute */
+               canonicalize_path(xlog_dir);
+               if (!is_absolute_path(xlog_dir))
+               {
+                       fprintf(stderr, _("%s: xlog directory location must be an absolute path\n"), progname);
+                       exit_nicely();
+               }
 
                /* check if the specified xlog directory is empty */
                switch (check_data_dir(xlog_dir))
@@ -3024,9 +3029,7 @@ main(int argc, char *argv[])
                                        exit_nicely();
                                }
                                else
-                               {
                                        check_ok();
-                               }
 
                                made_new_xlogdir = true;
                                break;
@@ -3056,7 +3059,7 @@ main(int argc, char *argv[])
                                                _("If you want to store the transaction log there, either\n"
                                                  "remove or empty the directory \"%s\".\n"),
                                                xlog_dir);
-                               exit(1);                /* no further message needed */
+                               exit_nicely();
 
                        default:
                                /* Trouble accessing directory */
@@ -3065,6 +3068,10 @@ main(int argc, char *argv[])
                                exit_nicely();
                }
 
+               /* form name of the place where the symlink must go */
+               linkloc = (char *) pg_malloc(strlen(pg_data) + 8 + 1);
+               sprintf(linkloc, "%s/pg_xlog", pg_data);
+
 #ifdef HAVE_SYMLINK
                if (symlink(xlog_dir, linkloc) != 0)
                {