[libgtop] Extending the cpu number from 32 to 1024 (bgo #323354, bgo #681632)

[Robert Roth <robertroth src gnome org>]

commit efaaf6eb77e01f1ea002c19a261e4f3ac4788d25
Author: Jason Xing <xinggang861 gmail com>
Date:   Thu Dec 12 22:36:10 2013 +0200

    Extending the cpu number from 32 to 1024 (bgo #323354, bgo #681632)
    
    From: Jason Xing <xinggang861 gmail com>
    
    In 'Bug 323354 - Support a dynamic number of CPUs', there will be a
    solution which can dynamically allocate memory for large number of
    CPUs. As libgtop supports multiple operating systems, this work
    may take some time.
    
    This patch is a temporary patch, which worked before the whole
    solution comes out. It only supports linux platform with CPU number
    up to 1024.
    
    There are two Macroes which limit the statistics of CPU. One is
    GLIBTOP_NCPU. The other is a buffer size. This buffer used to read
    /proc/stat contents into.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=323354
    https://bugzilla.gnome.org/show_bug.cgi?id=681632

 include/glibtop/cpu.h |    2 +-
 sysdeps/linux/cpu.c   |    3 ++-
 sysdeps/linux/open.c  |    3 ++-
 3 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/include/glibtop/cpu.h b/include/glibtop/cpu.h
index 1d673e9..1566b29 100644
--- a/include/glibtop/cpu.h
+++ b/include/glibtop/cpu.h
@@ -54,7 +54,7 @@ G_BEGIN_DECLS
    Yes we are :)
    Nobody should really be using more than 32 processors.
 */
-#define GLIBTOP_NCPU           32
+#define GLIBTOP_NCPU           1024
 
 typedef struct _glibtop_cpu    glibtop_cpu;
 
diff --git a/sysdeps/linux/cpu.c b/sysdeps/linux/cpu.c
index bedeab5..f2cbb4e 100644
--- a/sysdeps/linux/cpu.c
+++ b/sysdeps/linux/cpu.c
@@ -66,11 +66,12 @@ _glibtop_init_cpu_s (glibtop *server)
 /* Provides information about cpu usage. */
 
 #define FILENAME       "/proc/stat"
+#define STAT_BUFSIZ     81920
 
 void
 glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)
 {
-       char buffer [BUFSIZ], *p;
+       char buffer [STAT_BUFSIZ], *p;
        int i;
 
        memset (buf, 0, sizeof (glibtop_cpu));
diff --git a/sysdeps/linux/open.c b/sysdeps/linux/open.c
index b39b99e..61c3d58 100644
--- a/sysdeps/linux/open.c
+++ b/sysdeps/linux/open.c
@@ -61,13 +61,14 @@ static void set_linux_version(glibtop *server)
 /* Opens pipe to gtop server. Returns 0 on success and -1 on error. */
 
 #define FILENAME       "/proc/stat"
+#define STAT_BUFSIZ     81920
 
 void
 glibtop_open_s (glibtop *server, const char *program_name,
                const unsigned long features,
                const unsigned flags)
 {
-       char buffer [BUFSIZ], *p = buffer;
+       char buffer [STAT_BUFSIZ], *p = buffer;
 
        server->name = program_name;