bzip2/0001-Improve-file-access.patch

From 74177ebe376144ca4e3141d869334b31e5e95ee3 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Sat, 26 Mar 2016 19:28:57 -0700
Subject: [PATCH] Improve file access

1) Don't open a file to find out if it exists. Use access(2).
2) use the "m" flag to glibc's fopen(3), to use mmap(2).
---
 bzip2.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/bzip2.c b/bzip2.c
index d95d280..8156f1a 100644
--- a/bzip2.c
+++ b/bzip2.c
@@ -939,10 +939,7 @@ void copyFileName ( Char* to, Char* from )
 static 
 Bool fileExists ( Char* name )
 {
-   FILE *tmp   = fopen ( name, "rb" );
-   Bool exists = (tmp != NULL);
-   if (tmp != NULL) fclose ( tmp );
-   return exists;
+   return (access(name, R_OK) == 0) ;
 }
 
 
@@ -1425,7 +1422,7 @@ void uncompress ( Char *name )
          break;
 
       case SM_F2O:
-         inStr = fopen ( inName, "rb" );
+         inStr = fopen ( inName, "rbm" );
          outStr = stdout;
          if ( inStr == NULL ) {
             fprintf ( stderr, "%s: Can't open input file %s:%s.\n",
@@ -1437,7 +1434,7 @@ void uncompress ( Char *name )
          break;
 
       case SM_F2F:
-         inStr = fopen ( inName, "rb" );
+         inStr = fopen ( inName, "rbm" );
          outStr = fopen_output_safely ( outName, "wb" );
          if ( outStr == NULL) {
             fprintf ( stderr, "%s: Can't create output file %s: %s.\n",
-- 
2.22.0