+/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
- * Copyright (C) 1999 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
*
*/
-#include "internal.h"
-#include <stdio.h>
-#include <mntent.h>
-#include <sys/stat.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 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;
- }
+/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
- 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);
-
- }
-
- return 0;
-}
-
-/*
- * Given a block device, find the mount table entry if that block device
- * is mounted.
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
- * Given any other file (or directory), find the mount table entry for its
- * filesystem.
+ * 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.
*/
-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;
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <mntent.h>
+#include <sys/vfs.h>
+#include "busybox.h"
- 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;
+#ifndef CONFIG_FEATURE_HUMAN_READABLE
+static long kscale(long b, long bs)
+{
+ return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE;
}
-
-
+#endif
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++;
+ long blocks_used;
+ long blocks_percent_used;
+#ifdef CONFIG_FEATURE_HUMAN_READABLE
+ unsigned long df_disp_hr = KILOBYTE;
+#endif
+ int status = EXIT_SUCCESS;
+ 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;
+
+#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";
}
- return 0;
- } else {
- FILE *mountTable;
- struct mntent *mountEntry;
-
- mountTable = setmntent("/proc/mounts", "r");
- if (mountTable == 0) {
- perror("/proc/mounts");
- exit(FALSE);
+ if(opt & 2) {
+ df_disp_hr = MEGABYTE;
+ disp_units_hdr = "1M-blocks";
}
-
- while ((mountEntry = getmntent(mountTable))) {
- int status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
- if (status)
- return status;
+#else
+ opt = bb_getopt_ulflags(argc, argv, "k");
+#endif
+
+ 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);
+ }
}
- endmntent(mountTable);
- }
- return 0;
+ do {
+ const char *device;
+ const char *mount_point;
+
+ 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;
+ }
+ }
+
+ 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;
+ }
+
+ 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);
+
+ bb_fflush_stdout_and_exit(status);
}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff