From: Philip Lorenz <philip@bithub.de>
Date: Sun, 3 Jan 2016 23:14:45 +0000 (+0100)
Subject: Use default value if _SC_GETPW_R_SIZE_MAX is unavailable.
X-Git-Tag: v0.8.15~22^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F582%2Fhead;p=thirdparty%2Fsnapper.git

Use default value if _SC_GETPW_R_SIZE_MAX is unavailable.

sysconf may return -1 if the value is unlimited.
---

diff --git a/pam/pam_snapper.c b/pam/pam_snapper.c
index 7d1c0f96..9c581fe9 100644
--- a/pam/pam_snapper.c
+++ b/pam/pam_snapper.c
@@ -518,6 +518,9 @@ static int get_ugid( pam_handle_t * pamh, const char *pam_user, uid_t * uid, gid
 	struct passwd *result;
 
 	long bufsize = sysconf( _SC_GETPW_R_SIZE_MAX );
+	if (bufsize == -1) {
+		bufsize = 1024;
+	}
 	char buf[bufsize];
 
 	if ( getpwnam_r( pam_user, &pwd, buf, bufsize, &result ) != 0 || result != &pwd ) {