config system: move some options closer to relevalnt tool subdirectories
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
185
libbb/Config.src
185
libbb/Config.src
@@ -61,32 +61,73 @@ config SHA3_SMALL
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64-bit x86: +270 bytes of code, 45% faster
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32-bit x86: +450 bytes of code, 75% faster
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config FEATURE_FAST_TOP
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bool "Faster /proc scanning code (+100 bytes)"
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default n # all "fast or small" options default to small
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config FEATURE_NON_POSIX_CP
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bool "Non-POSIX, but safer, copying to special nodes"
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default y
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help
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This option makes top and ps ~20% faster (or 20% less CPU hungry),
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but code size is slightly bigger.
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With this option, "cp file symlink" will delete symlink
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and create a regular file. This does not conform to POSIX,
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but prevents a symlink attack.
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Similarly, "cp file device" will not send file's data
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to the device. (To do that, use "cat file >device")
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config FEATURE_ETC_NETWORKS
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bool "Support /etc/networks"
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config FEATURE_VERBOSE_CP_MESSAGE
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bool "Give more precise messages when copy fails (cp, mv etc)"
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default n
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help
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Enable support for network names in /etc/networks. This is
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a rarely used feature which allows you to use names
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instead of IP/mask pairs in route command.
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Error messages with this feature enabled:
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config FEATURE_ETC_SERVICES
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bool "Consult /etc/services even for well-known ports"
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default n
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$ cp file /does_not_exist/file
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cp: cannot create '/does_not_exist/file': Path does not exist
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$ cp file /vmlinuz/file
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cp: cannot stat '/vmlinuz/file': Path has non-directory component
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If this feature is not enabled, they will be, respectively:
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cp: cannot create '/does_not_exist/file': No such file or directory
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cp: cannot stat '/vmlinuz/file': Not a directory
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This will cost you ~60 bytes.
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config FEATURE_USE_SENDFILE
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bool "Use sendfile system call"
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default y
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help
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Look up e.g. "telnet" and "http" in /etc/services file
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instead of assuming ports 23 and 80.
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This is almost never necessary (everybody uses standard ports),
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and it makes sense to avoid reading this file.
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If you disable this option, in the cases where port is explicitly
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specified as a service name (e.g. "telnet HOST PORTNAME"),
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it will still be looked up in /etc/services.
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When enabled, busybox will use the kernel sendfile() function
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instead of read/write loops to copy data between file descriptors
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(for example, cp command does this a lot).
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If sendfile() doesn't work, copying code falls back to read/write
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loop. sendfile() was originally implemented for faster I/O
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from files to sockets, but since Linux 2.6.33 it was extended
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to work for many more file types.
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config FEATURE_COPYBUF_KB
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int "Copy buffer size, in kilobytes"
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range 1 1024
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default 4
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help
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Size of buffer used by cp, mv, install, wget etc.
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Buffers which are 4 kb or less will be allocated on stack.
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Bigger buffers will be allocated with mmap, with fallback to 4 kb
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stack buffer if mmap fails.
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config MONOTONIC_SYSCALL
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bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
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default y
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help
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Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
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time intervals (time, ping, traceroute etc need this).
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Probably requires Linux 2.6+. If not selected, gettimeofday
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will be used instead (which gives wrong results if date/time
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is reset).
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config IOCTL_HEX2STR_ERROR
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bool "Use ioctl names rather than hex values in error messages"
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default y
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help
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Use ioctl names rather than hex values in error messages
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(e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
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saves about 1400 bytes.
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config FEATURE_EDITING
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bool "Command line editing"
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@@ -302,107 +343,3 @@ config UNICODE_PRESERVE_BROKEN
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For example, this means that entering 'l', 's', ' ', 0xff, [Enter]
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at shell prompt will list file named 0xff (single char name
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with char value 255), not file named '?'.
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config FEATURE_NON_POSIX_CP
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bool "Non-POSIX, but safer, copying to special nodes"
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default y
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help
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With this option, "cp file symlink" will delete symlink
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and create a regular file. This does not conform to POSIX,
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but prevents a symlink attack.
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Similarly, "cp file device" will not send file's data
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to the device. (To do that, use "cat file >device")
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config FEATURE_VERBOSE_CP_MESSAGE
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bool "Give more precise messages when copy fails (cp, mv etc)"
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default n
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help
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Error messages with this feature enabled:
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$ cp file /does_not_exist/file
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cp: cannot create '/does_not_exist/file': Path does not exist
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$ cp file /vmlinuz/file
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cp: cannot stat '/vmlinuz/file': Path has non-directory component
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If this feature is not enabled, they will be, respectively:
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cp: cannot create '/does_not_exist/file': No such file or directory
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cp: cannot stat '/vmlinuz/file': Not a directory
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This will cost you ~60 bytes.
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config FEATURE_USE_SENDFILE
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bool "Use sendfile system call"
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default y
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help
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When enabled, busybox will use the kernel sendfile() function
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instead of read/write loops to copy data between file descriptors
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(for example, cp command does this a lot).
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If sendfile() doesn't work, copying code falls back to read/write
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loop. sendfile() was originally implemented for faster I/O
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from files to sockets, but since Linux 2.6.33 it was extended
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to work for many more file types.
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config FEATURE_COPYBUF_KB
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int "Copy buffer size, in kilobytes"
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range 1 1024
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default 4
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help
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Size of buffer used by cp, mv, install, wget etc.
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Buffers which are 4 kb or less will be allocated on stack.
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Bigger buffers will be allocated with mmap, with fallback to 4 kb
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stack buffer if mmap fails.
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config FEATURE_SKIP_ROOTFS
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bool "Skip rootfs in mount table"
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default y
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help
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Ignore rootfs entry in mount table.
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In Linux, kernel has a special filesystem, rootfs, which is initially
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mounted on /. It contains initramfs data, if kernel is configured
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to have one. Usually, another file system is mounted over / early
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in boot process, and therefore most tools which manipulate
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mount table, such as df, will skip rootfs entry.
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However, some systems do not mount anything on /.
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If you need to configure busybox for one of these systems,
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you may find it useful to turn this option off to make df show
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initramfs statistics.
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Otherwise, choose Y.
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config MONOTONIC_SYSCALL
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bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
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default y
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help
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Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
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time intervals (time, ping, traceroute etc need this).
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Probably requires Linux 2.6+. If not selected, gettimeofday
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will be used instead (which gives wrong results if date/time
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is reset).
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config IOCTL_HEX2STR_ERROR
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bool "Use ioctl names rather than hex values in error messages"
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default y
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help
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Use ioctl names rather than hex values in error messages
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(e.g. VT_DISALLOCATE rather than 0x5608). If disabled this
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saves about 1400 bytes.
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config FEATURE_HWIB
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bool "Support infiniband HW"
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default y
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help
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Support for printing infiniband addresses in network applets.
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config FEATURE_TIMEZONE
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bool "Allow timezone in dates"
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default y
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depends on DESKTOP
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help
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Permit the use of timezones when parsing user-provided data
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strings, e.g. '1996-04-09 12:45:00 -0500'.
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This requires support for the '%z' extension to strptime() which
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may not be available in all implementations.
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