+/*
+ * 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/vfs.h>
#include <fstab.h>
-static 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(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 ) {
- perror(mountPoint);
- return 1;
+ struct statfs s;
+ long blocks_used;
+ long blocks_percent_used;
+ struct fstab* fstabItem;
+
+ if (statfs(mountPoint, &s) != 0) {
+ perror(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 (strcmp (device, "/dev/root") == 0) {
+ fstabItem = getfsfile ("/");
+ if (fstabItem != NULL)
+ device = fstabItem->fs_spec;
}
-
- 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);
- if ( strcmp(device, "/dev/root")==0)
- device=(getfsfile ("/"))->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);
+ 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 TRUE;
}
-/*
- * Given a block device, find the mount table entry if that block device
- * is mounted.
- *
- * Given any other file (or directory), find the mount table entry for its
- * filesystem.
- */
-extern struct mntent *
-findMountPoint(const char* name, const char* table)
+extern int df_main(int argc, char **argv)
{
- struct stat s;
- dev_t mountDevice;
- FILE * mountTable;
- struct mntent * mountEntry;
-
- if ( stat(name, &s) != 0 )
- return 0;
-
- if ( (s.st_mode & S_IFMT) == S_IFBLK )
- mountDevice = s.st_rdev;
- else
- mountDevice = s.st_dev;
-
-
- if ( (mountTable = setmntent(table, "r")) == 0 )
- return 0;
-
- while ( (mountEntry = getmntent(mountTable)) != 0 ) {
- if ( strcmp(name, mountEntry->mnt_dir) == 0
- || strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */
- break;
- if ( stat(mountEntry->mnt_fsname, &s) == 0
- && s.st_rdev == mountDevice ) /* Match the device. */
- break;
- if ( stat(mountEntry->mnt_dir, &s) == 0
- && s.st_dev == mountDevice ) /* Match the directory's mount point. */
- break;
+ printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
+ "1k-blocks", "Used", "Available", "Use%", "Mounted on");
+
+ if (argc > 1) {
+ struct mntent *mountEntry;
+ int status;
+
+ 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++;
}
- endmntent(mountTable);
- return mountEntry;
-}
-
-
-
-extern int
-df_main(int argc, char * * argv)
-{
- printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
- "1k-blocks", "Used", "Available", "Use%", "Mounted on");
-
- if ( argc > 1 ) {
- struct mntent* mountEntry;
- int status;
-
- while ( argc > 1 ) {
- if ( (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;
+ exit( TRUE);
+ } else {
+ FILE *mountTable;
+ struct mntent *mountEntry;
+
+ mountTable = setmntent(mtab_file, "r");
+ if (mountTable == 0) {
+ perror(mtab_file);
+ exit(FALSE);
}
- else {
- FILE * mountTable;
- struct mntent * mountEntry;
- mountTable = setmntent("/proc/mounts", "r");
- if ( mountTable == 0) {
- perror("/proc/mounts");
- exit( FALSE);
- }
-
- while ( (mountEntry = getmntent (mountTable))) {
- int status=df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
- if (status)
- return status;
- }
- endmntent(mountTable);
+ while ((mountEntry = getmntent(mountTable))) {
+ df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
}
-
- return 0;
-}
-
-
+ endmntent(mountTable);
+ }
+ exit( TRUE);
+}
projects / oweals / busybox.git / blobdiff