Wrap a table (bg set to black, width=80%) around the screenshot

[oweals/busybox.git] / df.c

diff --git a/df.c b/df.c
index c387204547aef77204a2cadb0e5a26bfcf35a782..7a24fedd05912da3585771fed881c74b7b63fb76 100644 (file)
--- a/df.c
+++ b/df.c
@@ -2,7 +2,7 @@
 /*
  * Mini df implementation for busybox
  *
- * Copyright (C) 1999,2000 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
  * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
  *
@@ -22,16 +22,17 @@
  *
  */
 
-#include "internal.h"
+#include "busybox.h"
 #include <stdio.h>
+#include <stdlib.h>
 #include <mntent.h>
-#include <sys/stat.h>
 #include <sys/vfs.h>
-
-static const char df_usage[] = "df [filesystem ...]\n\n"
-       "Print the filesystem space used and space available.\n";
+#include <getopt.h>
 
 extern const char mtab_file[]; /* Defined in utility.c */
+#ifdef BB_FEATURE_HUMAN_READABLE
+unsigned long disp_hr = KILOBYTE; 
+#endif
 
 static int df(char *device, const char *mountPoint)
 {
@@ -40,26 +41,38 @@ static int df(char *device, const char *mountPoint)
        long blocks_percent_used;
 
        if (statfs(mountPoint, &s) != 0) {
-               perror(mountPoint);
+               perror_msg("%s", mountPoint);
                return FALSE;
        }
 
        if (s.f_blocks > 0) {
                blocks_used = s.f_blocks - s.f_bfree;
-               blocks_percent_used = (long)
-                       (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
-               /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
+               if(0 == blocks_used)
+                       blocks_percent_used = 0;
+               else
+                       blocks_percent_used = (long)
+                         (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
                if (strcmp(device, "/dev/root") == 0) {
                        /* Adjusts device to be the real root device,
                         * or leaves device alone if it can't find it */
                        find_real_root_device_name( device);
                }
+#ifdef BB_FEATURE_HUMAN_READABLE
+               printf("%-20s %9s",
+                          device,
+                          format((s.f_blocks * s.f_bsize), disp_hr));
+               printf(" %9s", format((s.f_blocks - s.f_bfree) * s.f_bsize, disp_hr));
+               printf(" %9s %3ld%% %s\n",
+                          format(s.f_bavail * s.f_bsize, disp_hr),
+                          blocks_percent_used, mountPoint);
+#else
                printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
                           device,
                           (long) (s.f_blocks * (s.f_bsize / 1024.0)),
                           (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)),
                           (long) (s.f_bavail * (s.f_bsize / 1024.0)),
                           blocks_percent_used, mountPoint);
+#endif
 
        }
 
@@ -68,45 +81,70 @@ static int df(char *device, const char *mountPoint)
 
 extern int df_main(int argc, char **argv)
 {
+       int status = EXIT_SUCCESS;
+       int opt = 0;
+       int i = 0;
+
+       while ((opt = getopt(argc, argv, "?"
+#ifdef BB_FEATURE_HUMAN_READABLE
+       "hm"
+#endif
+       "k"
+)) > 0)
+       {
+               switch (opt) {
+#ifdef BB_FEATURE_HUMAN_READABLE
+                       case 'h': disp_hr = 0;         break;
+                       case 'm': disp_hr = MEGABYTE;  break;
+                       case 'k': disp_hr = KILOBYTE;  break;
+#else
+                       case 'k': break;
+#endif
+                       case '?': goto print_df_usage; break;
+               }
+       }
+
        printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
-                  "1k-blocks", "Used", "Available", "Use%", "Mounted on");
+#ifdef BB_FEATURE_HUMAN_READABLE
+                  (KILOBYTE == disp_hr) ? "1k-blocks" : "     Size",
+#else
+                  "1k-blocks",
+#endif
+              "Used", "Available", "Use%", "Mounted on");
 
-       if (argc > 1) {
-               struct mntent *mountEntry;
-               int status;
 
-               if (**(argv + 1) == '-') {
-                       usage(df_usage);
-               }
-               while (argc > 1) {
-                       if ((mountEntry = findMountPoint(argv[1], mtab_file)) == 0) {
-                               fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
-                               exit(FALSE);
-                       }
-                       status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
-                       if (status != 0)
-                               exit(status);
-                       argc--;
-                       argv++;
+       if(optind < argc) {
+               struct mntent *mountEntry;
+               for(i = optind; i < argc; i++)
+               {
+                       if ((mountEntry = find_mount_point(argv[i], mtab_file)) == 0) {
+                               error_msg("%s: can't find mount point.\n", argv[i]);
+                               status = EXIT_FAILURE;
+                       } else if (!df(mountEntry->mnt_fsname, mountEntry->mnt_dir))
+                               status = EXIT_FAILURE;
                }
-               exit(TRUE);
        } else {
                FILE *mountTable;
                struct mntent *mountEntry;
 
                mountTable = setmntent(mtab_file, "r");
                if (mountTable == 0) {
-                       perror(mtab_file);
-                       exit(FALSE);
+                       perror_msg("%s", mtab_file);
+                       return EXIT_FAILURE;
                }
 
                while ((mountEntry = getmntent(mountTable))) {
-                       df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+                       if (!df(mountEntry->mnt_fsname, mountEntry->mnt_dir))
+                               status = EXIT_FAILURE;
                }
                endmntent(mountTable);
        }
 
-       exit(TRUE);
+       return status;
+
+print_df_usage:
+    usage(df_usage);
+    return(FALSE);
 }
 
 /*