From a05f132cd5c6d7cbc59791b0e4f3839df0988f3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C3=B6sz=C3=B6rm=C3=A9nyi=20Zolt=C3=A1n?= <zboszor@pr.hu>
Date: Fri, 19 Jun 2020 14:31:28 +0200
Subject: [PATCH] Fixed bug #79570

Use the same logic for getgrgid_r, getpwnam_r and getpwuid_r
as for getgrnam_r in #75696
---
 ext/posix/posix.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index 090f47a79536d..a697c0c4677eb 100644
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -883,8 +883,14 @@ PHP_FUNCTION(posix_getgrgid)
 
 	grbuf = emalloc(grbuflen);
 
+try_again:
 	ret = getgrgid_r(gid, &_g, grbuf, grbuflen, &retgrptr);
 	if (ret || retgrptr == NULL) {
+		if (errno == ERANGE) {
+			grbuflen *= 2;
+			grbuf = erealloc(grbuf, grbuflen);
+			goto try_again;
+		}
 		POSIX_G(last_error) = ret;
 		efree(grbuf);
 		RETURN_FALSE;
@@ -952,7 +958,13 @@ PHP_FUNCTION(posix_getpwnam)
 	buf = emalloc(buflen);
 	pw = &pwbuf;
 
+try_again:
 	if (getpwnam_r(name, pw, buf, buflen, &pw) || pw == NULL) {
+		if (errno == ERANGE) {
+			buflen *= 2;
+			buf = erealloc(buf, buflen);
+			goto try_again;
+		}
 		efree(buf);
 		POSIX_G(last_error) = errno;
 		RETURN_FALSE;
@@ -1001,8 +1013,14 @@ PHP_FUNCTION(posix_getpwuid)
 	}
 	pwbuf = emalloc(pwbuflen);
 
+try_again:
 	ret = getpwuid_r(uid, &_pw, pwbuf, pwbuflen, &retpwptr);
 	if (ret || retpwptr == NULL) {
+		if (errno == ERANGE) {
+			pwbuflen *= 2;
+			pwbuf = erealloc(pwbuf, pwbuflen);
+			goto try_again;
+		}
 		POSIX_G(last_error) = ret;
 		efree(pwbuf);
 		RETURN_FALSE;