Faster pagesize aligned fopen for netstat -s (Eric Dumazet)

2 files changed, 26 insertions, 4 deletions

diff --git a/lib/proc.c b/lib/proc.c
index bf34dbe..9cd4eeb 100644
--- a/lib/proc.c
+++ b/lib/proc.c
@@ -1,11 +1,12 @@
 /* Tolerant /proc file parser. Copyright 1998 Andi Kleen */
-/* $Id: proc.c,v 1.4 1999/01/05 20:54:00 philip Exp $ */ 
+/* $Id: proc.c,v 1.5 2007/12/01 18:44:57 ecki Exp $ */ 
 /* Fixme: cannot currently cope with removed fields */ 
 
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <ctype.h>
+#include <unistd.h>
 
 /* Caller must free return string. */
 
@@ -72,3 +73,22 @@ int proc_guess_fmt(char *name, FILE *fh, ...)
     va_end(ap);
     return flag;
 }
+
+
+FILE *proc_fopen(const char *name)
+{
+    static char *buffer;
+    static size_t pagesz;
+    FILE *fd = fopen(name, "r");
+
+    if (fd == NULL)
+      return NULL;
+      
+    if (!buffer) {
+      pagesz = getpagesize();
+      buffer = malloc(pagesz);
+    }
+    
+    setvbuf(fd, buffer, _IOFBF, pagesz);
+    return fd;
+}
diff --git a/lib/proc.h b/lib/proc.h
index 91f803c..0f4ed93 100644
--- a/lib/proc.h
+++ b/lib/proc.h
@@ -1,5 +1,7 @@
-
-
-/* Generate a suitable scanf format for a column title line */
+/* 
+ * prototypes for proc.c
+ */
 char *proc_gen_fmt(char *name, int more, FILE * fh,...);
 int   proc_guess_fmt(char *name, FILE* fh,...);
+FILE *proc_fopen(const char *name);
+