+/* vi: set sw=4 ts=4: */
/*
* Mini df implementation for busybox
*
- * Copyright (C) 1999 by Lineo, inc.
+ * Copyright (C) 1999,2000 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>.
*
#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";
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nPrint the filesystem space used and space available.\n"
+#endif
+ ;
+extern const char mtab_file[]; /* Defined in utility.c */
static int df(char *device, const char *mountPoint)
{
- struct statfs s;
- long blocks_used;
- long blocks_percent_used;
+ struct statfs s;
+ long blocks_used;
+ long blocks_percent_used;
- 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);
- 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.
- *
- * 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 (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) {
+ /* Adjusts device to be the real root device,
+ * or leaves device alone if it can't find it */
+ find_real_root_device_name( device);
+ }
+ 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 ((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;
+ return TRUE;
}
-
-
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++;
+ printf("%-20s %-14s %s %s %s %s\n", "Filesystem",
+ "1k-blocks", "Used", "Available", "Use%", "Mounted on");
+
+ if (argc > 1) {
+ struct mntent *mountEntry;
+ int status;
+
+ if (**(argv + 1) == '-') {
+ usage(df_usage);
+ }
+ 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++;
+ }
+ exit(TRUE);
+ } else {
+ FILE *mountTable;
+ struct mntent *mountEntry;
+
+ mountTable = setmntent(mtab_file, "r");
+ if (mountTable == 0) {
+ perror(mtab_file);
+ exit(FALSE);
+ }
+
+ while ((mountEntry = getmntent(mountTable))) {
+ df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+ }
+ endmntent(mountTable);
}
- 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;
- }
- endmntent(mountTable);
- }
-
- return 0;
+ exit(TRUE);
}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff