+/*
+ * Mini df implementation for busybox
+ *
+ * Copyright (C) 1999 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>.
+ *
+ * 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
+ *
+ */
+
#include "internal.h"
#include <stdio.h>
#include <mntent.h>
#include <sys/stat.h>
#include <sys/vfs.h>
+#include <fstab.h>
-const char df_usage[] = "df [filesystem ...]\n"
-"\n"
-"\tPrint the filesystem space used and space available.\n";
+static const char df_usage[] = "df [filesystem ...]\n"
+ "\n" "\tPrint the filesystem space used and space available.\n";
+extern const char mtab_file[]; /* Defined in utility.c */
-static int
-df(const char * device, const char * mountPoint)
+static int df(char *device, const char *mountPoint)
{
- struct statfs s;
- long blocks_used;
- long blocks_percent_used;
-
- if ( statfs(mountPoint, &s) != 0 ) {
- name_and_error(mountPoint);
- return 1;
- }
-
- 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);
-
-/*
- printf(
- "%-20s %7ld %7ld %7ld %5ld%% %s\n"
- ,device
- ,s.f_blocks
- ,s.f_blocks - s.f_bfree
- ,s.f_bavail
- ,blocks_percent_used
- ,mountPoint);
-*/
+ struct statfs s;
+ long blocks_used;
+ long blocks_percent_used;
+ struct fstab* fstabItem;
- printf(
- "%-20s %7.0f %7.0f %7.0f %5ld%% %s\n"
- ,device
- ,s.f_blocks * (s.f_bsize / 1024.0)
- ,(s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)
- ,s.f_bavail * (s.f_bsize / 1024.0)
- ,blocks_percent_used
- ,mountPoint);
+ if (statfs(mountPoint, &s) != 0) {
+ perror(mountPoint);
+ return 1;
+ }
+ 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 (strcmp (device, "/dev/root") == 0) {
+ fstabItem = getfsfile ("/");
+ if (fstabItem != NULL)
+ device = fstabItem->fs_spec;
}
+ 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);
- return 0;
+ }
+
+ return 0;
}
-extern int
-df_main(struct FileInfo * i, int argc, char * * argv)
+extern int df_main(int argc, char **argv)
{
- static const char header[] =
- "Filesystem 1024-blocks Used Available Capacity Mounted on\n";
- printf(header);
+ printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
+ "1k-blocks", "Used", "Available", "Use%", "Mounted on");
+
+ /* Only compiled in if BB_MTAB is not defined */
+ whine_if_fstab_is_missing();
- if ( argc > 1 ) {
- struct mntent * mountEntry;
- int status;
+ if (argc > 1) {
+ struct mntent *mountEntry;
+ int status;
- while ( argc > 1 ) {
- if ( (mountEntry = findMountPoint(argv[1], "/etc/mtab")) == 0
- && (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 )
- {
- fprintf(stderr, "%s: can't find mount point.\n"
- ,argv[1]);
- return 1;
- }
- status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
- if ( status != 0 )
- return status;
- argc--;
- argv++;
- }
- return 0;
+ while (argc > 1) {
+ if ((mountEntry = findMountPoint(argv[1], mtab_file)) ==
+ 0) {
+ fprintf(stderr, "%s: can't find mount point.\n", argv[1]);
+ return 1;
+ }
+ status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+ if (status != 0)
+ return status;
+ argc--;
+ argv++;
}
- else {
- FILE * mountTable;
- struct mntent * mountEntry;
+ return 0;
+ } else {
+ FILE *mountTable;
+ struct mntent *mountEntry;
- if ( (mountTable = setmntent("/etc/mtab", "r")) == 0
- && (mountTable = setmntent("/proc/mounts", "r")) == 0
- ) {
- name_and_error("/etc/mtab");
- return 1;
- }
+ mountTable = setmntent(mtab_file, "r");
+ if (mountTable == 0) {
+ perror(mtab_file);
+ exit(FALSE);
+ }
- while ( (mountEntry = getmntent(mountTable)) != 0 ) {
- int status = df(
- mountEntry->mnt_fsname
- ,mountEntry->mnt_dir);
- if ( status != 0 )
- return status;
- }
- endmntent(mountTable);
+ while ((mountEntry = getmntent(mountTable))) {
+ int status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+ if (status)
+ return status;
}
-
- return 0;
+ endmntent(mountTable);
+ }
+
+ return 0;
}
projects / oweals / busybox.git / blobdiff