glibc/SOURCES/glibc-rh1871397-7.patch

From 4f62a21d0ed19ff29bba704167179b862140d011 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 16 Jul 2020 17:28:28 +0200
Subject: [PATCH 07/11] grp: Implement fgetgrent_r using __nss_fgetent_r

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---
 grp/fgetgrent_r.c | 54 ++++++------------------------------------------------
 1 file changed, 6 insertions(+), 48 deletions(-)

diff --git a/grp/fgetgrent_r.c b/grp/fgetgrent_r.c
index 03daf4f..b598584 100644
--- a/grp/fgetgrent_r.c
+++ b/grp/fgetgrent_r.c
@@ -20,10 +20,6 @@
 #include <grp.h>
 #include <stdio.h>
 
-#include <libio/iolibio.h>
-#define flockfile(s) _IO_flockfile (s)
-#define funlockfile(s) _IO_funlockfile (s)
-
 /* Define a line parsing function using the common code
    used in the nss_files module.  */
 
@@ -59,49 +55,11 @@ int
 __fgetgrent_r (FILE *stream, struct group *resbuf, char *buffer, size_t buflen,
 	       struct group **result)
 {
-  char *p;
-  int parse_result;
-
-  flockfile (stream);
-  do
-    {
-      buffer[buflen - 1] = '\xff';
-      p = fgets_unlocked (buffer, buflen, stream);
-      if (__builtin_expect (p == NULL, 0) && feof_unlocked (stream))
-	{
-	  funlockfile (stream);
-	  *result = NULL;
-	  __set_errno (ENOENT);
-	  return errno;
-	}
-      if (__builtin_expect (p == NULL, 0) || buffer[buflen - 1] != '\xff')
-	{
-	  funlockfile (stream);
-	  *result = NULL;
-	  __set_errno (ERANGE);
-	  return errno;
-	}
-
-      /* Skip leading blanks.  */
-      while (isspace (*p))
-	++p;
-    } while (*p == '\0' || *p == '#'	/* Ignore empty and comment lines.  */
-	     /* Parse the line.  If it is invalid, loop to
-		get the next line of the file to parse.  */
-	     || ! (parse_result = parse_line (p, resbuf,
-					      (void *) buffer, buflen,
-					      &errno)));
-
-  funlockfile (stream);
-
-  if (__builtin_expect (parse_result, 0) == -1)
-    {
-      /* The parser ran out of space.  */
-      *result = NULL;
-      return errno;
-    }
-
-  *result = resbuf;
-  return 0;
+  int ret = __nss_fgetent_r (stream, resbuf, buffer, buflen, parse_line);
+  if (ret == 0)
+    *result = resbuf;
+  else
+    *result = NULL;
+  return ret;
 }
 weak_alias (__fgetgrent_r, fgetgrent_r)
-- 
1.8.3.1