expr: small code shrink
[oweals/busybox.git] / coreutils / df.c
index 9d53f2bc43771fe9335c76545083ea07b80b477b..82730806edce899470c23e8668e5526bdc7f7104 100644 (file)
@@ -5,20 +5,7 @@
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
  *
- * 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
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
 /* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing.  Also blocksize. */
 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  *
  * Size reduction.  Removed floating point dependency.  Added error checking
- * on output.  Output stats on 0-sized filesystems if specificly listed on
+ * on output.  Output stats on 0-sized filesystems if specifically listed on
  * the command line.  Properly round *-blocks, Used, and Available quantities.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
 #include <mntent.h>
 #include <sys/vfs.h>
-#include "busybox.h"
+#include "libbb.h"
 
 #ifndef CONFIG_FEATURE_HUMAN_READABLE
 static long kscale(long b, long bs)
 {
-       return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
+       return ( b * (long long) bs + 1024/2 ) / 1024;
 }
 #endif
 
-extern int df_main(int argc, char **argv)
+int df_main(int argc, char **argv);
+int df_main(int argc, char **argv)
 {
        long blocks_used;
        long blocks_percent_used;
 #ifdef CONFIG_FEATURE_HUMAN_READABLE
-       unsigned long df_disp_hr = KILOBYTE;
+       unsigned long df_disp_hr = 1024;
 #endif
        int status = EXIT_SUCCESS;
-       unsigned long opt;
+       unsigned opt;
        FILE *mount_table;
        struct mntent *mount_entry;
        struct statfs s;
@@ -62,27 +46,28 @@ extern int df_main(int argc, char **argv)
        const char *disp_units_hdr = hdr_1k;
 
 #ifdef CONFIG_FEATURE_HUMAN_READABLE
-       bb_opt_complementaly = "h-km:k-hm:m-hk";
-       opt = bb_getopt_ulflags(argc, argv, "hmk");
-       if(opt & 1) {
-                               df_disp_hr = 0;
-                               disp_units_hdr = "     Size";
+       opt_complementary = "h-km:k-hm:m-hk";
+       opt = getopt32(argc, argv, "hmk");
+       if (opt & 1) {
+               df_disp_hr = 0;
+               disp_units_hdr = "     Size";
        }
-       if(opt & 2) {
-                               df_disp_hr = MEGABYTE;
-                               disp_units_hdr = "1M-blocks";
+       if (opt & 2) {
+               df_disp_hr = 1024*1024;
+               disp_units_hdr = "1M-blocks";
        }
 #else
-       opt = bb_getopt_ulflags(argc, argv, "k");
+       opt = getopt32(argc, argv, "k");
 #endif
 
-       bb_printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
+       printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
                          "", disp_units_hdr);
 
        mount_table = NULL;
        argv += optind;
        if (optind >= argc) {
-               if (!(mount_table = setmntent(bb_path_mtab_file, "r"))) {
+               mount_table = setmntent(bb_path_mtab_file, "r");
+               if (!mount_table) {
                        bb_perror_msg_and_die(bb_path_mtab_file);
                }
        }
@@ -92,17 +77,20 @@ extern int df_main(int argc, char **argv)
                const char *mount_point;
 
                if (mount_table) {
-                       if (!(mount_entry = getmntent(mount_table))) {
+                       mount_entry = getmntent(mount_table);
+                       if (!mount_entry) {
                                endmntent(mount_table);
                                break;
                        }
                } else {
-                       if (!(mount_point = *argv++)) {
+                       mount_point = *argv++;
+                       if (!mount_point) {
                                break;
                        }
-                       if (!(mount_entry = find_mount_point(mount_point, bb_path_mtab_file))) {
-                               bb_error_msg("%s: can't find mount point.", mount_point);
-                       SET_ERROR:
+                       mount_entry = find_mount_point(mount_point, bb_path_mtab_file);
+                       if (!mount_entry) {
+                               bb_error_msg("%s: can't find mount point", mount_point);
+ SET_ERROR:
                                status = EXIT_FAILURE;
                                continue;
                        }
@@ -121,8 +109,8 @@ extern int df_main(int argc, char **argv)
                        blocks_percent_used = 0;
                        if (blocks_used + s.f_bavail) {
                                blocks_percent_used = (((long long) blocks_used) * 100
-                                                                          + (blocks_used + s.f_bavail)/2
-                                                                          ) / (blocks_used + s.f_bavail);
+                                               + (blocks_used + s.f_bavail)/2
+                                               ) / (blocks_used + s.f_bavail);
                        }
 
                        if (strcmp(device, "rootfs") == 0) {
@@ -130,24 +118,25 @@ extern int df_main(int argc, char **argv)
                        } else if (strcmp(device, "/dev/root") == 0) {
                                /* Adjusts device to be the real root device,
                                * or leaves device alone if it can't find it */
-                               if ((device = find_real_root_device_name(device)) == NULL) {
+                               device = find_block_device("/");
+                               if (!device) {
                                        goto SET_ERROR;
                                }
                        }
 
 #ifdef CONFIG_FEATURE_HUMAN_READABLE
-                       bb_printf("%-21s%9s ", device,
-                                         make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
+                       printf("%-20s %9s ", device,
+                               make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
 
-                       bb_printf("%9s ",
-                                         make_human_readable_str( (s.f_blocks - s.f_bfree),
-                                                                                         s.f_bsize, df_disp_hr));
+                       printf("%9s ",
+                               make_human_readable_str( (s.f_blocks - s.f_bfree),
+                                               s.f_bsize, df_disp_hr));
 
-                       bb_printf("%9s %3ld%% %s\n",
+                       printf("%9s %3ld%% %s\n",
                                          make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
                                          blocks_percent_used, mount_point);
 #else
-                       bb_printf("%-21s%9ld %9ld %9ld %3ld%% %s\n",
+                       printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
                                          device,
                                          kscale(s.f_blocks, s.f_bsize),
                                          kscale(s.f_blocks-s.f_bfree, s.f_bsize),
@@ -158,13 +147,5 @@ extern int df_main(int argc, char **argv)
 
        } while (1);
 
-       bb_fflush_stdout_and_exit(status);
+       fflush_stdout_and_exit(status);
 }
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/