[libgtop] Use a dynamically allocated buffer to read /proc/cpuinfo to handle computers with a lot of CPUs.

[Benoît Dejean <bdejean src gnome org>]

commit b0ab056e99d83246475ef097dd27c04fafd49d70
Author: Benoît Dejean <bdejean gmail com>
Date:   Sat Jan 21 09:49:22 2017 +0100

    Use a dynamically allocated buffer to read /proc/cpuinfo to handle computers
    with a lot of CPUs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=323354

 sysdeps/linux/sysinfo.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/sysdeps/linux/sysinfo.c b/sysdeps/linux/sysinfo.c
index bd80b0d..99d8fcc 100644
--- a/sysdeps/linux/sysinfo.c
+++ b/sysdeps/linux/sysinfo.c
@@ -36,16 +36,20 @@ static glibtop_sysinfo sysinfo = { .flags = 0 };
 static void
 init_sysinfo (glibtop *server)
 {
-       char buffer [65536];
+       char* buffer;
        gchar ** processors;
 
        if(G_LIKELY(sysinfo.flags)) return;
 
-       file_to_buffer(server, buffer, sizeof buffer, FILENAME);
+       if (!g_file_get_contents(FILENAME, &buffer, NULL, NULL)) {
+               glibtop_error_io_r(server, "g_file_get_contents(%s)", FILENAME);
+       }
 
        /* cpuinfo records are seperated by a blank line */
        processors = g_strsplit(buffer, "\n\n", 0);
 
+       g_free(buffer);
+
        for(sysinfo.ncpu = 0;
            sysinfo.ncpu < GLIBTOP_NCPU && processors[sysinfo.ncpu] && *processors[sysinfo.ncpu];
            sysinfo.ncpu++) {