top,ps: 'stringify' tty only when needed. -60 bytes.

[oweals/busybox.git] / procps / free.c

diff --git a/procps/free.c b/procps/free.c
index a81189be9066b9dead885304b7dc33f616a4c546..42193fdec9889c1f09b372db47bf1e9be8cfa588 100644 (file)
--- a/procps/free.c
+++ b/procps/free.c
@@ -2,62 +2,67 @@
 /*
  * Mini free implementation for busybox
  *
- * Copyright (C) 1999,2000 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
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
+ * Licensed under the GPL version 2, see the file LICENSE in this tarball.
  */
 
-#include "internal.h"
-#include <stdio.h>
-#include <sys/sysinfo.h>
+/* getopt not needed */
 
-#define DIVISOR        1024
-extern int free_main(int argc, char **argv)
+#include "libbb.h"
+
+int free_main(int argc, char **argv);
+int free_main(int argc, char **argv)
 {
        struct sysinfo info;
        sysinfo(&info);
-       info.totalram/=DIVISOR;
-       info.freeram/=DIVISOR;
-       info.totalswap/=DIVISOR;
-       info.freeswap/=DIVISOR;
-       info.sharedram/=DIVISOR;
-       info.bufferram/=DIVISOR;
-
-       if (argc > 1 && **(argv + 1) == '-') {
-               usage("free\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-                               "\nDisplays the amount of free and used system memory\n"
+
+       /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
+       if (info.mem_unit == 0) {
+               info.mem_unit=1;
+       }
+       if (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;
+#ifndef __uClinux__
+               info.totalswap/=info.mem_unit;
+               info.freeswap/=info.mem_unit;
 #endif
-                               );
+               info.sharedram/=info.mem_unit;
+               info.bufferram/=info.mem_unit;
+       } else {
+               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;
+#ifndef __uClinux__
+               info.totalswap*=info.mem_unit;
+               info.freeswap*=info.mem_unit;
+#endif
+               info.sharedram*=info.mem_unit;
+               info.bufferram*=info.mem_unit;
        }
 
+       if (argc > 1 && *argv[1] == '-')
+               bb_show_usage();
 
-       printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", 
+       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, 
+       printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram,
+                       info.totalram-info.freeram, info.freeram,
                        info.sharedram, info.bufferram);
 
+#ifndef __uClinux__
        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(TRUE);
+#endif
+       return EXIT_SUCCESS;
 }