From: drepper <drepper>
Date: Wed, 18 Aug 1999 23:05:01 +0000 (+0000)
Subject: (_IO_file_xsgetn): Allocate buffer if none is allocated so far.
X-Git-Tag: glibc_2-1-91~6397
X-Git-Url: http://git.csclub.uwaterloo.ca/?p=kopensolaris-gnu%2Fglibc.git;a=commitdiff_plain;h=0e5ede77f61c03af1d3344471403b3431f9049a0;hp=011feebd00bbf11e02159923dc6446518eb0bb44

(_IO_file_xsgetn): Allocate buffer if none is allocated so far.
---

diff --git a/libio/fileops.c b/libio/fileops.c
index decb9d7185..7c6e271495 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -849,6 +849,17 @@ _IO_file_xsgetn (fp, data, n)
 
   want = n;
 
+  if (fp->_IO_buf_base == NULL)
+    {
+      /* Maybe we already have a push back pointer.  */
+      if (fp->_IO_save_base != NULL)
+	{
+	  free (fp->_IO_save_base);
+	  fp->_flags &= ~_IO_IN_BACKUP;
+	}
+      _IO_doallocbuf (fp);
+    }
+
   while (want > 0)
     {
       have = fp->_IO_read_end - fp->_IO_read_ptr;