-#include "internal.h"
-#include <stdio.h>
-#include <mntent.h>
-#include <sys/stat.h>
-#include <sys/vfs.h>
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini df implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
-const char df_usage[] = "df [filesystem ...]\n"
-"\n"
-"\tPrint the filesystem space used and space available.\n";
+/* 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 specifically listed on
+ * the command line. Properly round *-blocks, Used, and Available quantities.
+ */
-static int
-df(const char * device, const char * mountPoint)
+#include <mntent.h>
+#include <sys/vfs.h>
+#include "libbb.h"
+
+#ifndef CONFIG_FEATURE_HUMAN_READABLE
+static long kscale(long b, long bs)
{
- struct statfs s;
- long blocks_used;
- long blocks_percent_used;
+ return ( b * (long long) bs + 1024/2 ) / 1024;
+}
+#endif
- if ( statfs(mountPoint, &s) != 0 ) {
- perror(mountPoint);
- return 1;
+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 = 1024;
+#endif
+ int status = EXIT_SUCCESS;
+ unsigned 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;
+
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ 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 ( 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 %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);
-
+ if (opt & 2) {
+ df_disp_hr = 1024*1024;
+ disp_units_hdr = "1M-blocks";
+ }
+#else
+ opt = getopt32(argc, argv, "k");
+#endif
+
+ printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n",
+ "", disp_units_hdr);
+
+ mount_table = NULL;
+ argv += optind;
+ if (optind >= argc) {
+ mount_table = setmntent(bb_path_mtab_file, "r");
+ if (!mount_table) {
+ bb_perror_msg_and_die(bb_path_mtab_file);
+ }
}
- return 0;
-}
+ do {
+ const char *device;
+ const char *mount_point;
-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;
+ if (mount_table) {
+ mount_entry = getmntent(mount_table);
+ if (!mount_entry) {
+ endmntent(mount_table);
+ break;
+ }
+ } else {
+ mount_point = *argv++;
+ if (!mount_point) {
+ break;
+ }
+ 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;
}
- status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
- if ( status != 0 )
- return status;
- argc--;
- argv++;
- }
- return 0;
- }
- 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;
+ device = mount_entry->mnt_fsname;
+ mount_point = mount_entry->mnt_dir;
+
+ if (statfs(mount_point, &s) != 0) {
+ bb_perror_msg("%s", mount_point);
+ goto SET_ERROR;
}
- endmntent(mountTable);
- }
-
- return 0;
-}
+ 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 */
+ device = find_block_device("/");
+ if (!device) {
+ goto SET_ERROR;
+ }
+ }
+#ifdef CONFIG_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,
+ 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);
-/*
- * 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)
-{
- 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;
- }
- endmntent(mountTable);
- return mountEntry;
+ fflush_stdout_and_exit(status);
}
projects / oweals / busybox.git / blobdiff