/*
* Mini df implementation for busybox
*
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999-2003 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
*
*/
+/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
+
+/* 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
+ * 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 <getopt.h>
#include "busybox.h"
-extern const char mtab_file[]; /* Defined in utility.c */
-#ifdef BB_FEATURE_HUMAN_READABLE
-static unsigned long df_disp_hr = KILOBYTE;
+#ifndef CONFIG_FEATURE_HUMAN_READABLE
+static long kscale(long b, long bs)
+{
+ return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
+}
#endif
-static int do_df(char *device, const char *mount_point)
+extern int df_main(int argc, char **argv)
{
- struct statfs s;
long blocks_used;
long blocks_percent_used;
-
- if (statfs(mount_point, &s) != 0) {
- perror_msg("%s", mount_point);
- return FALSE;
- }
-
- if (s.f_blocks > 0) {
- blocks_used = s.f_blocks - s.f_bfree;
- if(blocks_used == 0)
- 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 */
- device = find_real_root_device_name(device);
- if(device==NULL)
- return FALSE;
- }
-#ifdef BB_FEATURE_HUMAN_READABLE
- printf("%-20s %9s ", device,
- make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr));
-
- printf("%9s ",
- make_human_readable_str( (s.f_blocks - s.f_bfree), s.f_bsize, df_disp_hr));
-
- printf("%9s %3ld%% %s\n",
- make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr),
- blocks_percent_used, mount_point);
-#else
- printf("%-20s %9ld %9ld %9ld %3ld%% %s\n",
- device,
- (long) (s.f_blocks * (s.f_bsize / (double)KILOBYTE)),
- (long) ((s.f_blocks - s.f_bfree)*(s.f_bsize/(double)KILOBYTE)),
- (long) (s.f_bavail * (s.f_bsize / (double)KILOBYTE)),
- blocks_percent_used, mount_point);
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ unsigned long df_disp_hr = KILOBYTE;
#endif
- }
-
- return TRUE;
-}
-
-extern int df_main(int argc, char **argv)
-{
int status = EXIT_SUCCESS;
- int opt = 0;
- int i = 0;
- char disp_units_hdr[80] = "1k-blocks"; /* default display is kilobytes */
+ unsigned long opt;
+ FILE *mount_table;
+ struct mntent *mount_entry;
+ struct statfs s;
+ static const char hdr_1k[] = "1k-blocks"; /* default display is kilobytes */
+ const char *disp_units_hdr = hdr_1k;
- while ((opt = getopt(argc, argv, "k"
-#ifdef BB_FEATURE_HUMAN_READABLE
- "hm"
-#endif
-)) > 0)
- {
- switch (opt) {
-#ifdef BB_FEATURE_HUMAN_READABLE
- case 'h':
+#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;
- strcpy(disp_units_hdr, " Size");
- break;
- case 'm':
+ disp_units_hdr = " Size";
+ }
+ if(opt & 2) {
df_disp_hr = MEGABYTE;
- strcpy(disp_units_hdr, "1M-blocks");
- break;
+ disp_units_hdr = "1M-blocks";
+ }
+#else
+ opt = bb_getopt_ulflags(argc, argv, "k");
#endif
- case 'k':
- /* default display is kilobytes */
- break;
- default:
- show_usage();
+
+ bb_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"))) {
+ bb_perror_msg_and_die(bb_path_mtab_file);
}
}
- printf("%-20s %-14s %s %s %s %s\n", "Filesystem", disp_units_hdr,
- "Used", "Available", "Use%", "Mounted on");
+ do {
+ const char *device;
+ const char *mount_point;
- if(optind < argc) {
- struct mntent *mount_entry;
- for(i = optind; i < argc; i++)
- {
- if ((mount_entry = find_mount_point(argv[i], mtab_file)) == 0) {
- error_msg("%s: can't find mount point.", argv[i]);
- status = EXIT_FAILURE;
- } else if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
+ if (mount_table) {
+ if (!(mount_entry = getmntent(mount_table))) {
+ endmntent(mount_table);
+ break;
+ }
+ } else {
+ if (!(mount_point = *argv++)) {
+ 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:
status = EXIT_FAILURE;
+ continue;
+ }
}
- } else {
- FILE *mount_table;
- struct mntent *mount_entry;
- mount_table = setmntent(mtab_file, "r");
- if (mount_table == 0) {
- perror_msg("%s", mtab_file);
- return EXIT_FAILURE;
- }
+ device = mount_entry->mnt_fsname;
+ mount_point = mount_entry->mnt_dir;
- while ((mount_entry = getmntent(mount_table))) {
- if (!do_df(mount_entry->mnt_fsname, mount_entry->mnt_dir))
- status = EXIT_FAILURE;
+ if (statfs(mount_point, &s) != 0) {
+ bb_perror_msg("%s", mount_point);
+ goto SET_ERROR;
}
- endmntent(mount_table);
- }
+
+ if ((s.f_blocks > 0) || !mount_table){
+ blocks_used = s.f_blocks - s.f_bfree;
+ 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);
+ }
+
+ if (strcmp(device, "rootfs") == 0) {
+ continue;
+ } 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) {
+ 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));
+
+ bb_printf("%9s ",
+ make_human_readable_str( (s.f_blocks - s.f_bfree),
+ s.f_bsize, df_disp_hr));
+
+ bb_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",
+ device,
+ kscale(s.f_blocks, s.f_bsize),
+ kscale(s.f_blocks-s.f_bfree, s.f_bsize),
+ kscale(s.f_bavail, s.f_bsize),
+ blocks_percent_used, mount_point);
+#endif
+ }
+
+ } while (1);
- return status;
+ bb_fflush_stdout_and_exit(status);
}
/*
projects / oweals / busybox.git / blobdiff