From 843657b06656c66fdf5fb45588a1e0691d9a395d Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 24 Jan 2001 03:50:06 +0000
Subject: [PATCH] attached is take-2 of a patch which fixes a bug related to
the use of getpwuid when running in standalone mode. this patch allocates
some persistent storage (using strdup) to store the username obtained with
getpwuid in src/backend/main/main.c. this is necessary because later on,
getpwuid is called again (in ValidateBinary).
the man pages for getpwuid on SCO OpenServer, FreeBSD,
and Darwin all have words to this effect (this is from
the SCO OpenServer man page):
Note
====
All information is contained in a static area, so it must
be copied if it is to be saved. Otherwise, it may be
overwritten on subsequent calls to these routines.
in particular, on my platform, the storage used to hold
the pw_name from the first call is overwritten such that
it looks like an empty username. this causes a problem
later on in SetSessionUserIdFromUserName.
i'd assume this isn't a problem on most platforms because
getpwuid is called with the same UID both times, and the
same thing ends up happening to that static storage each
time. however, that's not guaranteed, and is _not_ what
happens on my platform (at least :).
this is for the version of 7.1 available via anon cvs as
of Tue Jan 23 15:14:00 2001 PST:
.../src/backend/main/main.c,v 1.37 2000/12/31 18:04:35 tgl Exp
-michael thornburgh, zenomt@armory.com
---
src/backend/main/main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/backend/main/main.c b/src/backend/main/main.c
index bb2615cb9c7..630948ec0d7 100644
--- a/src/backend/main/main.c
+++ b/src/backend/main/main.c
@@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/main/main.c,v 1.37 2000/12/31 18:04:35 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/main/main.c,v 1.38 2001/01/24 03:50:06 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -53,6 +53,7 @@ main(int argc, char *argv[])
{
int len;
struct passwd *pw;
+ char * pw_name_persist;
/*
* Place platform-specific startup hacks here. This is the right
@@ -158,6 +159,7 @@ main(int argc, char *argv[])
fprintf(stderr, "%s: invalid current euid", argv[0]);
exit(1);
}
+ pw_name_persist = strdup(pw->pw_name);
- exit(PostgresMain(argc, argv, argc, argv, pw->pw_name));
+ exit(PostgresMain(argc, argv, argc, argv, pw_name_persist));
}
--
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