Index: ext/posix/posix.c
===================================================================
RCS file: /repository/php-src/ext/posix/posix.c,v
retrieving revision 1.70.2.3.2.11
diff -u -p -d -r1.70.2.3.2.11 posix.c
--- ext/posix/posix.c	11 Jan 2007 02:33:07 -0000	1.70.2.3.2.11
+++ ext/posix/posix.c	11 Jan 2007 08:40:55 -0000
@@ -575,6 +575,10 @@ PHP_FUNCTION(posix_ttyname)
 	}
 #if HAVE_TTYNAME_R
 	buflen = sysconf(_SC_TTY_NAME_MAX);
+	
+	if (buflen < 0) {
+		RETURN_FALSE;
+	}
 	p = emalloc(buflen);
 
 	if (ttyname_r(fd, p, buflen)) {
@@ -834,6 +838,10 @@ PHP_FUNCTION(posix_getgrnam)
 
 #if HAVE_GETGRNAM_R
 	buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
+
+	if (buflen < 0) {
+		RETURN_FALSE;
+	}
 	buf = emalloc(buflen);
 	g = &gbuf;
 
@@ -881,6 +889,10 @@ PHP_FUNCTION(posix_getgrgid)
 #ifdef HAVE_GETGRGID_R
 	
 	grbuflen = sysconf(_SC_GETGR_R_SIZE_MAX);
+	
+	if (grbuflen < 0) {
+		RETURN_FALSE;
+	}
 	grbuf = emalloc(grbuflen);
 
 	ret = getgrgid_r(gid, &_g, grbuf, grbuflen, &retgrptr);
@@ -944,6 +956,10 @@ PHP_FUNCTION(posix_getpwnam)
 
 #if defined(_SC_GETPW_R_SIZE_MAX) && defined(HAVE_GETPWNAM_R)
 	buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
+	
+	if (buflen < 0) {
+		RETURN_FALSE;
+	}
 	buf = emalloc(buflen);
 	pw = &pwbuf;
 
@@ -990,6 +1006,10 @@ PHP_FUNCTION(posix_getpwuid)
 	}
 #if defined(_SC_GETPW_R_SIZE_MAX) && defined(HAVE_GETPWUID_R)
 	pwbuflen = sysconf(_SC_GETPW_R_SIZE_MAX);
+
+	if (pwbuflen < 0) {
+		RETURN_FALSE;
+	}
 	pwbuf = emalloc(pwbuflen);
 
 	ret = getpwuid_r(uid, &_pw, pwbuf, pwbuflen, &retpwptr);
Index: main/safe_mode.c
===================================================================
RCS file: /repository/php-src/main/Attic/safe_mode.c,v
retrieving revision 1.62.2.1.2.6
diff -u -p -d -r1.62.2.1.2.6 safe_mode.c
--- main/safe_mode.c	9 Jan 2007 23:27:22 -0000	1.62.2.1.2.6
+++ main/safe_mode.c	11 Jan 2007 08:40:55 -0000
@@ -228,11 +228,16 @@ PHPAPI char *php_get_current_user()
 		return SG(request_info).current_user;		
 #else
 		struct passwd *pwd;
-#ifdef HAVE_GETPWUID_R
+#if defined(_SC_GETPW_R_SIZE_MAX) && defined(HAVE_GETPWNAM_R)
 		struct passwd _pw;
 		struct passwd *retpwptr = NULL;
 		int pwbuflen = sysconf(_SC_GETPW_R_SIZE_MAX);
-		char *pwbuf = emalloc(pwbuflen);
+		char *pwbuf;
+
+		if (pwbuflen < 0) {
+			pwbuflen = 2048;
+		}
+		pwbuf = emalloc(pwbuflen);
 
 		if (getpwuid_r(pstat->st_uid, &_pw, pwbuf, pwbuflen, &retpwptr) != 0) {
 			efree(pwbuf);
Index: ext/standard/filestat.c
===================================================================
RCS file: /repository/php-src/ext/standard/filestat.c,v
retrieving revision 1.136.2.8.2.8
diff -u -p -d -r1.136.2.8.2.8 filestat.c
--- ext/standard/filestat.c	11 Jan 2007 02:33:07 -0000	1.136.2.8.2.8
+++ ext/standard/filestat.c	11 Jan 2007 08:40:56 -0000
@@ -369,6 +369,11 @@ static void php_do_chgrp(INTERNAL_FUNCTI
 		int grbuflen = sysconf(_SC_GETGR_R_SIZE_MAX);
 		char *grbuf = emalloc(grbuflen);
 
+		if (grbuflen < 0) {
+			grbuflen = 2048;
+		}
+		grbuf = emalloc(grbuflen);
+
 		if (getgrnam_r(Z_STRVAL_PP(group), &gr, grbuf, grbuflen, &retgrptr) != 0 || retgrptr == NULL) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to find gid for %s", Z_STRVAL_PP(group));
 			efree(grbuf);
@@ -458,7 +463,12 @@ static void php_do_chown(INTERNAL_FUNCTI
 		struct passwd pw;
 		struct passwd *retpwptr = NULL;
 		int pwbuflen = sysconf(_SC_GETPW_R_SIZE_MAX);
-		char *pwbuf = emalloc(pwbuflen);
+		char *pwbuf;
+
+		if (pwbuflen < 0) {
+			pwbuflen = 2048;
+		}
+		pwbuf = emalloc(pwbuflen);
 
 		if (getpwnam_r(Z_STRVAL_PP(user), &pw, pwbuf, pwbuflen, &retpwptr) != 0 || retpwptr == NULL) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to find uid for %s", Z_STRVAL_PP(user));