Patch from Jeff Garzik marking a few 'getopt not needed' apps.

[oweals/busybox.git] / free.c

diff --git a/free.c b/free.c
index 36d357522e16265dede3763e3218a7f5ae3e95b0..41e872d12c689c8dafd8763e6ca6be5172bd426b 100644 (file)
--- a/free.c
+++ b/free.c
@@ -1,7 +1,8 @@
+/* vi: set sw=4 ts=4: */
 /*
  * Mini free implementation for busybox
  *
- * Copyright (C) 1999 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -20,16 +21,47 @@
  *
  */
 
-#include "internal.h"
 #include <stdio.h>
-
-
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
-#endif
+#include <errno.h>
+#include <stdlib.h>
+#include "busybox.h"
 
 extern int free_main(int argc, char **argv)
 {
-    char* cmd[] = { "cat", "/proc/meminfo", "\0" };
-    exit(cat_main( 3, cmd));
+       struct sysinfo info;
+       sysinfo(&info);
+
+       /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
+       if (info.mem_unit==0) {
+               info.mem_unit=1;
+       }
+       info.mem_unit*=1024;
+       
+       /* TODO:  Make all this stuff not overflow when mem >= 4 Gib */
+       info.totalram/=info.mem_unit;
+       info.freeram/=info.mem_unit;
+       info.totalswap/=info.mem_unit;
+       info.freeswap/=info.mem_unit;
+       info.sharedram/=info.mem_unit;
+       info.bufferram/=info.mem_unit;
+
+       if (argc > 1 && **(argv + 1) == '-')
+               show_usage();
+
+       printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", 
+                       "shared", "buffers");
+
+       printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram, 
+                       info.totalram-info.freeram, info.freeram, 
+                       info.sharedram, info.bufferram);
+
+       printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
+                       info.totalswap-info.freeswap, info.freeswap);
+
+       printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
+                       (info.totalram-info.freeram)+(info.totalswap-info.freeswap),
+                       info.freeram+info.freeswap);
+       return EXIT_SUCCESS;
 }
+
+