From f7ac9e71b18fa7314151f2ab65ee0bdd2ea89c07 Mon Sep 17 00:00:00 2001
From: Karel Zak
Date: Tue, 15 Dec 2015 12:25:56 +0100
Subject: login, mount: fix __SC_GETPW_R_SIZE_MAX usage

sysconf(_SC_GETPW_R_SIZE_MAX) returns initial suggested size for pwd
buffer (see getpwnam_r man page or POSIX). This is not large enough in
some cases.

Yes, this sysconf option is misnamed (should be _SC_GETPW_R_SIZE_MIN).

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 include/c.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'include/c.h')

diff --git a/include/c.h b/include/c.h
index 2a317eb52..ca028baee 100644
--- a/include/c.h
+++ b/include/c.h
@@ -346,4 +346,13 @@ static inline int xusleep(useconds_t usec)
 # define UL_ASAN_BLACKLIST	/* nothing */
 #endif
 
+
+
+/*
+ * Note that sysconf(_SC_GETPW_R_SIZE_MAX) returns *initial* suggested size for
+ * pwd buffer and in some cases it is not large enough. See POSIX and
+ * getpwnam_r man page for more details.
+ */
+#define UL_GETPW_BUFSIZ	(16 * 1024)
+
 #endif /* UTIL_LINUX_C_H */
-- 
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