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Some docs

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-Erik
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Erik Andersen
2000-04-13 01:18:23 +00:00
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@@ -11,53 +11,151 @@ busybox - I am BusyBox of Borg. Unix will be assimilated.
=head1 DESCRIPTION
BusyBox is a multi-call binary that combines many common Unix utilities into a
single executable. Most people will create a symlink to busybox for each
function name, and BusyBox will act like whatever you invoke it as.
single executable. Most people will create a link to busybox for each function
they wish to use, and BusyBox will act like whatever it was invoked as. For
example,
ln -s ./busybox ls
./ls
will cause BusyBox to behave as 'ls' (if the 'ls' command has been compiled
into busybox). You can also invoke BusyBox by providing it the command to run
on the command line. For example,
./busybox ls
will also cause BusyBox to behave as 'ls'.
BusyBox has been written with size-optimization in mind. It is very easy to
include or exclude the commands you want installed. BusyBox tries to make
itself useful to small systems with limited resources.
include or exclude the commands (or features) you want installed. BusyBox
tries to make itself useful to small systems with limited resources.
=head1 COMMANDS
Currently defined functions:
busybox, cat, chmod, chown, chgrp, chroot, clear, chvt, cp, date,
dd, df, dmesg, du, fbset, find, free, deallocvt, fsck.minix, mkfs.minix,
grep, head, hostname, init, linuxrc, kill, ln, ls, lsmod, mkdir,
mknod, mkswap, more, mount, mv, ping, poweroff, ps, pwd, reboot,
rm, rmdir, sed, sleep, sort, sync, syslogd, swapon, swapoff, tail,
tar, tee, touch, true, false, uname, umount, uniq, update, zcat,
gunzip, gzip
Currently defined functions include:
basename, cat, chmod, chown, chgrp, chroot, clear, chvt, cp, mv, date,
dd, df, dirname, dmesg, du, dutmp, echo, fbset, fdflush, find, free,
freeramdisk, deallocvt, fsck.minix, mkfs.minix, grep, gunzip, gzip,
halt, head, hostid, hostname, init, kill, killall, length, ln, loadacm,
loadfont, loadkmap, ls, lsmod, makedevs, math, mkdir, mkfifo, mknod,
mkswap, mnc, more, mount, mt, nslookup, poweroff, ping, printf, ps,
pwd, reboot, rm, rmdir, rmmod, sed, sh, fdisk, sfdisk, sleep, sort,
sync, syslogd, logger, logname, swapon, swapoff, tail, tar, [, test,
tee, touch, tr, true, false, tty, umount, uname, uptime, uniq, update,
usleep, wc, whoami, yes, zcat
=head1 OPTIONS
Common Options:
Most BusyBox commands support the "--help" option to provide a
terse runtime description of their behavior.
=over 4
=item basename
Usage: basename [file ...]
Strips directory and suffix from filenames.
Example:
$ basename /usr/local/bin/foo
foo
$ basename /usr/local/bin/
bin
=item cat
Usage: cat [file ...]
Concatenates files and prints them to the standard output.
Example:
$ cat /proc/uptime
110716.72 17.67
=item chmod
Usage: chmod [-R] MODE[,MODE]... FILE...
Each MODE is one or more of the letters ugoa, one of the symbols +-= and
one or more of the letters rwxst.
Changes file access permissions for the specified file(s) or directory(s).
Each MODE is defined by combining the letters for WHO has access to the file,
an OPERATOR for selecting how the permissions should be changed, and a
PERISSION for the file(s) or directory(s).
WHO may be chosen from:
u the User who owns the file
g users in the file's Group
o Other users not in the file's group
a All users
OPERATOR may be chosen from:
+ add a permission
- remove a permission
= assign a permission
PERMISSION may be chosen from:
r Read
w Write
x eXecute (or access for directories)
s Set user (or group) ID bit
t sTickey bit (for directories prevents removing files by non-owners)
Alternately, permissions may be set numerically where the first three
numbers are calculated by adding the octal values:
4 Read
2 Write
1 eXecute
An optional fourth digit may also be used to specify
4 Set user ID
2 Set group ID
1 sTickey bit
Options:
-R change files and directories recursively.
Example:
$ ls -l /tmp/foo
-rw-rw-r-- 1 root root 0 Apr 12 18:25 /tmp/foo
$ chmod u+x /tmp/foo
$ ls -l /tmp/foo
-rwxrw-r-- 1 root root 0 Apr 12 18:25 /tmp/foo*
$ chmod 444 /tmp/foo
$ ls -l /tmp/foo
-r--r--r-- 1 root root 0 Apr 12 18:25 /tmp/foo
=item chown
Usage: chown [OPTION]... OWNER[.[GROUP] FILE...
Change the owner and/or group of each FILE to OWNER and/or GROUP.
Changes the owner and/or group of each FILE to OWNER and/or GROUP.
Options:
-R change files and directories recursively
Example:
$ ls -l /tmp/foo
-r--r--r-- 1 andersen andersen 0 Apr 12 18:25 /tmp/foo
$ chown root /tmp/foo
$ ls -l /tmp/foo
-r--r--r-- 1 root andersen 0 Apr 12 18:25 /tmp/foo
$ chown root.root /tmp/foo
ls -l /tmp/foo
-r--r--r-- 1 root root 0 Apr 12 18:25 /tmp/foo
=item chgrp
@@ -69,6 +167,13 @@ Options:
-R change files and directories recursively
Example:
$ ls -l /tmp/foo
-r--r--r-- 1 andersen andersen 0 Apr 12 18:25 /tmp/foo
$ chgrp root /tmp/foo
$ ls -l /tmp/foo
-r--r--r-- 1 andersen root 0 Apr 12 18:25 /tmp/foo
=item chroot
@@ -76,10 +181,18 @@ Usage: chroot NEWROOT [COMMAND...]
Run COMMAND with root directory set to NEWROOT.
Exmaple:
$ ls -l /bin/ls
lrwxrwxrwx 1 root root 12 Apr 13 00:46 /bin/ls -> /bin/busybox
$ mount /dev/hdc1 /mnt -t minix
$ chroot /mnt
$ ls -l /bin/ls
-rwxr-xr-x 1 root root 40816 Feb 5 07:45 /bin/ls*
=item clear
Clears the screen.
=item chvt
@@ -92,53 +205,109 @@ Change foreground virtual terminal to /dev/ttyN
Usage: cp [OPTION]... SOURCE DEST
or: cp [OPTION]... SOURCE... DIRECTORY
or: cp [OPTION]... SOURCE... DIRECTORY
Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.
-a same as -dpR
-d preserve links
-p preserve file attributes if possible
-R copy directories recursively
-a same as -dpR
-d preserve links
-p preserve file attributes if possable
-R copy directories recursively
=item date
Usage: date [OPTION]... [+FORMAT]
or: date [OPTION] [MMDDhhmm[[CC]YY][.ss]]
Display the current time in the given FORMAT, or set the system date.
Options:
-R output RFC-822 compliant date string
-s set time described by STRING
-u print or set Coordinated Universal Time
Example:
$ date
Wed Apr 12 18:52:41 MDT 2000
=item dd
Usage: dd [if=name] [of=name] [bs=n] [count=n]
Usage: dd [if=name] [of=name] [bs=n] [count=n] [skip=n] [seek=n]
Copy a file, converting and formatting according to options
if=FILE read from FILE instead of stdin
of=FILE write to FILE instead of stout
bs=n read and write N BYTES at a time
count=n copy only n input blocks
BYTES may be suffixed by w (x2), k (x1024), b (x512), or m (x1024^2).
if=FILE read from FILE instead of stdin
of=FILE write to FILE instead of stdout
bs=n read and write n bytes at a time
count=n copy only n input blocks
skip=n skip n input blocks
seek=n skip n output blocks
Numbers may be suffixed by w (x2), k (x1024), b (x512), or M (x1024^2)
Example:
$ dd if=/dev/zero of=/dev/ram1 bs=1M count=4
4+0 records in
4+0 records out
=item df
Usage: df
Usage: df [filesystem ...]
Prints the filesystem space used and space available.
Exmaple:
$ df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/sda3 8690864 8553540 137324 98% /
/dev/sda1 64216 36364 27852 57% /boot
$ df /dev/sda3
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/sda3 8690864 8553540 137324 98% /
=item dmesg
Usage: dmesg [-c] [-n level] [-s bufsize]
Print or controls the kernel ring buffer.
=item du
Usage: Usage: du [OPTION]... [FILE]...
Usage: du [OPTION]... [FILE]...
-s display only a total for each argument
Summarize disk space used for each FILE and/or directory.
Disk space is printed in units of 1k (i.e. 1024 bytes).
Options:
-l count sizes many times if hard linked
-s display only a total for each argument
Example:
$ ./busybox du
16 ./CVS
12 ./kernel-patches/CVS
80 ./kernel-patches
12 ./tests/CVS
36 ./tests
12 ./scripts/CVS
16 ./scripts
12 ./docs/CVS
104 ./docs
2417 .
=item fbset
Usage: fbset [options] [mode]
Show and modify frame buffer device settings
Options:
-h
@@ -162,25 +331,40 @@ Usage: find [PATH...] [EXPRESSION]
Search for files in a directory hierarchy. The default PATH is
the current directory; default EXPRESSION is '-print'
EXPRESSION may consist of:
-follow
Dereference symbolic links.
-name PATTERN
File name (with leading directories removed) matches PATTERN.
-print
print the full file name followed by a newline to stdout.
This version of find matches full regular expresions.
EXPRESSION may consist of:
-follow
Dereference symbolic links.
-name PATTERN
File name (with leading directories removed) matches PATTERN.
-print
print the full file name followed by a newline to stdout.
Example:
$ find / -name /etc/passwd
/etc/passwd
=item free
Usage: free
Displays the amount of free and used memory in the system.
Example:
$ free
total used free shared buffers
Mem: 257628 248724 8904 59644 93124
Swap: 128516 8404 120112
Total: 386144 257128 129016
=item deallocvt
Usage: deallocvt N
Deallocate unused virtual terminal /dev/ttyN
Deallocates unused virtual terminal /dev/ttyN
=item fsck.minix
@@ -189,15 +373,14 @@ Usage: fsck.minix [-larvsmf] /dev/name
Performs a consistency check for MINIX filesystems.
Options:
-l Lists all filenames
-r Perform interactive repairs
-a Perform automatic repairs
-v verbose
-s Outputs super-block information
-m Activates MINIX-like "mode not cleared" warnings
-f Force file system check.
OPTIONS:
-l Lists all filenames
-r Perform interactive repairs
-a Perform automatic repairs
-v verbose
-s Outputs super-block information
-m Activates MINIX-like "mode not cleared" warnings
-f Force file system check.
=item mkfs.minix
@@ -206,27 +389,52 @@ Usage: mkfs.minix [-c | -l filename] [-nXX] [-iXX] /dev/name [blocks]
Make a MINIX filesystem.
Options:
-c Check the device for bad blocks
-n [14|30] Specify the maximum length of filenames
-i Specify the number of inodes for the filesystem
-l FILENAME Read the bad blocks list from FILENAME
-v Make a Minix version 2 filesystem
OPTIONS:
-c Check the device for bad blocks
-n [14|30] Specify the maximum length of filenames
-i Specify the number of inodes for the filesystem
-l FILENAME Read the bad blocks list from FILENAME
-v Make a Minix version 2 filesystem
=item grep
Usage: grep [OPTIONS]... PATTERN [FILE]...
Search for PATTERN in each FILE or standard input.
OPTIONS:
-h suppress the prefixing filename on output
-i ignore case distinctions
-n print line number with output lines
-q be quiet. Returns 0 if result was found, 1 otherwise
This version of grep matches full regular expresions.
Example:
$ grep root /etc/passwd
root:x:0:0:root:/root:/bin/bash
$ grep ^[rR]oo. /etc/passwd
root:x:0:0:root:/root:/bin/bash
=item head
Usage: Usage: head [FILE]...
Usage: head [OPTION] [FILE]...
Print first 10 lines of each FILE to standard output.
With more than one FILE, precede each with a header giving the
file name. With no FILE, or when FILE is -, read standard input.
Options:
-n NUM Print first NUM lines instead of first 10
Example:
$ head -n 2 /etc/passwd
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
=item hostname
@@ -234,18 +442,37 @@ Usage: hostname [OPTION] {hostname | -F file}
Get or set the hostname or DNS domain name. If a hostname is given
(or a file with the -F parameter), the host name will be set.
Options:
-s Short
-i Addresses for the hostname
-d DNS domain name
-F FILE Use the contents of FILE to specify the hostname
Options:
-s Short
-i Addresses for the hostname
-d DNS domain name
-F FILE Use the contents of FILE to specify the hostname
Example:
$ hostname
slag
=item kill
Usage: kill [-signal] process-id [process-id ...]
Send a signal (default is SIGTERM) to the specified process(es).
Options:
-l List all signal names and numbers.
Example:
$ ps | grep apache
252 root root S [apache]
263 www-data www-data S [apache]
264 www-data www-data S [apache]
265 www-data www-data S [apache]
266 www-data www-data S [apache]
267 www-data www-data S [apache]
$ kill 252
=item ln