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手册页第 1 部分:用户命令     Oracle Solaris 11 Information Library (简体中文)
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getconf

- get configuration values

用法概要

/usr/bin/getconf [-v specification] system_var
/usr/bin/getconf [-v specification] path_var pathname
/usr/bin/getconf -a
/usr/xpg4/bin/getconf [-v specification] system_var
/usr/xpg4/bin/getconf [-v specification] path_var pathname
/usr/xpg4/bin/getconf -a
/usr/xpg6/bin/getconf [-v specification] system_var
/usr/xpg6/bin/getconf [-v specification] path_var pathname
/usr/xpg6/bin/getconf -a

描述

In the first synopsis form, the getconf utility writes to the standard output the value of the variable specified by system_var, in accordance with specification if the -v option is used.

In the second synopsis form, getconf writes to the standard output the value of the variable specified by path_var for the path specified by pathname, in accordance with specification if the -v option is used.

In the third synopsis form, config writes to the standard output the names of the current system configuration variables.

The value of each configuration variable is determined as if it were obtained by calling the function from which it is defined to be available. The value reflects conditions in the current operating environment.

选项

The following options are supported:

-a

Writes the names of the current system configuration variables to the standard output.

-v specification

Gives the specification which governs the selection of values for configuration variables.

操作数

The following operands are supported:

path_var

A name of a configuration variable whose value is available from the pathconf(2) function. All of the values in the following table are supported:

LINK_MAX
NAME_MAX
_POSIX_CHOWN_RESTRICTED
MAX_CANON
PATH_MAX
_POSIX_NO_TRUNC
MAX_INPUT
PIPE_BUF
_POSIX_VDISABLE
pathname

A path name for which the variable specified by path_var is to be determined.

system_var

A name of a configuration variable whose value is available from confstr(3C) or sysconf(3C). All of the values in the following table are supported:

ARG_MAX
BC_BASE_MAX
BC_DIM_MAX
BC_SCALE_MAX
BC_STRING_MAX
CHAR_BIT
CHARCLASS_NAME_MAX
CHAR_MAX
CHAR_MIN
CHILD_MAX
CLK_TCK
COLL_WEIGHTS_MAX
CS_PATH
EXPR_NEST_MAX
HOST_NAME_MAX
INT_MAX
INT_MIN
LFS64_CFLAGS
LFS64_LDFLAGS
LFS64_LIBS
LFS64_LINTFLAGS
LFS_CFLAGS
LFS_LDFLAGS
LFS_LIBS
LFS_LINTFLAGS
LINE_MAX
LONG_BIT
LONG_MAX
LONG_MIN
MB_LEN_MAX
NGROUPS_MAX
NL_ARGMAX
NL_LANGMAX
NL_MSGMAX
NL_NMAX
NL_SETMAX
NL_TEXTMAX
NZERO
OPEN_MAX
POSIX2_BC_BASE_MAX
POSIX2_BC_DIM_MAX
POSIX2_BC_SCALE_MAX
POSIX2_BC_STRING_MAX
POSIX2_C_BIND
POSIX2_C_DEV
POSIX2_CHAR_TERM
POSIX2_COLL_WEIGHTS_MAX
POSIX2_C_VERSION
POSIX2_EXPR_NEST_MAX
POSIX2_FORT_DEV
POSIX2_FORT_RUN
POSIX2_LINE_MAX
POSIX2_LOCALEDEF
POSIX2_RE_DUP_MAX
POSIX2_SW_DEV
POSIX2_SYMLINKS
POSIX2_UPE
POSIX2_VERSION
POSIX_ALLOC_SIZE_MIN
POSIX_REC_INCR_XFER_SIZE
POSIX_REC_MAX_XFER_SIZE
POSIX_REC_MIN_XFER_SIZE
POSIX_REC_XFER_ALIGN
POSIX_V6_ILP32_OFF32
POSIX_V6_ILP32_OFF32_CFLAGS
POSIX_V6_ILP32_OFF32_LDFLAGS
POSIX_V6_ILP32_OFF32_LIBS
POSIX_V6_ILP32_OFFBIG
POSIX_V6_ILP32_OFFBIG_CFLAGS
POSIX_V6_ILP32_OFFBIG_LDFLAGS
POSIX_V6_ILP32_OFFBIG_LIBS
POSIX_V6_LP64_OFF64
POSIX_V6_LP64_OFF64_CFLAGS
POSIX_V6_LP64_OFF64_LDFLAGS
POSIX_V6_LP64_OFF64_LIBS
POSIX_V6_LPBIG_OFFBIG
POSIX_V6_LPBIG_OFFBIG_CFLAGS
POSIX_V6_LPBIG_OFFBIG_LDFLAGS
POSIX_V6_LPBIG_OFFBIG_LIBS
POSIX_V6_WIDTH_RESTRICTED_ENVS
SYMLINK_MAX
SYMLOOP_MAX
_POSIX2_BC_BASE_MAX
_POSIX2_BC_DIM_MAX
_POSIX2_BC_SCALE_MAX
_POSIX2_BC_STRING_MAX
_POSIX2_CHARCLASS_NAME_MAX
_POSIX2_CHAR_TERM
_POSIX2_COLL_WEIGHTS_MAX
_POSIX2_C_BIND
_POSIX2_C_DEV
_POSIX2_C_VERSION
_POSIX2_EXPR_NEST_MAX
_POSIX2_FORT_DEV
_POSIX2_FORT_RUN
_POSIX2_LINE_MAX
_POSIX2_LOCALEDEF
_POSIX2_PBS
_POSIX2_PBS_ACCOUNTING
_POSIX2_PBS_CHECKPOINT
_POSIX2_PBS_LOCATE
_POSIX2_PBS_MESSAGE
_POSIX2_PBS_TRACK
_POSIX2_RE_DUP_MAX
_POSIX2_SW_DEV
_POSIX2_UPE
_POSIX2_VERSION
_POSIX_ADVISORY_INFO
_POSIX_AIO_LISTIO_MAX
_POSIX_AIO_MAX
_POSIX_ARG_MAX
_POSIX_ASYNC_IO
_POSIX_BARRIERS
_POSIX_CHILD_MAX
_POSIX_CLOCKRES_MIN
_POSIX_CLOCK_SELECTION
_POSIX_CPUTIME
_POSIX_DELAYTIMER_MAX
_POSIX_HOST_NAME_MAX
_POSIX_IPV6
_POSIX_JOB_CONTROL
_POSIX_LINK_MAX
_POSIX_LOGIN_NAME_MAX
_POSIX_MAX_CANON
_POSIX_MAX_INPUT
_POSIX_MONOTONIC_CLOCK
_POSIX_MQ_OPEN_MAX
_POSIX_MQ_PRIO_MAX
_POSIX_NAME_MAX
_POSIX_NGROUPS_MAX
_POSIX_OPEN_MAX
_POSIX_PATH_MAX
_POSIX_PIPE_BUF
_POSIX_PRIO_IO
_POSIX_RAW_SOCKETS
_POSIX_READER_WRITER_LOCKS
_POSIX_REGEXP
_POSIX_RE_DUP_MAX
_POSIX_RTSIG_MAX
_POSIX_SAVED_IDS
_POSIX_SEM_NSEMS_MAX
_POSIX_SEM_VALUE_MAX
_POSIX_SHELL
_POSIX_SIGQUEUE_MAX
_POSIX_SPAWN
_POSIX_SPIN_LOCKS
_POSIX_SPORADIC_SERVER
_POSIX_SSIZE_MAX
_POSIX_SS_REPL_MAX
_POSIX_STREAM_MAX
_POSIX_SYMLINK_MAX
_POSIX_SYMLOOP_MAX
_POSIX_SYNC_IO
_POSIX_THREAD_ATTR_STACKADDR
_POSIX_THREAD_ATTR_STACKSIZE
_POSIX_THREAD_CPUTIME
_POSIX_THREAD_DESTRUCTOR_ITERATIONS
_POSIX_THREAD_KEYS_MAX
_POSIX_THREAD_PRIORITY_SCHEDULING
_POSIX_THREAD_PRIO_INHERIT
_POSIX_THREAD_PRIO_PROTECT
_POSIX_THREAD_PROCESS_SHARED
_POSIX_THREAD_SAFE_FUNCTIONS
_POSIX_THREAD_SPORADIC_SERVER
_POSIX_THREAD_THREADS_MAX
_POSIX_TIMEOUTS
_POSIX_TIMER_MAX
_POSIX_TRA_POSIX_TIMER_MAXCE
_POSIX_TIMESTAMP_RESOLUTION
_POSIX_TRACE_EVENT_FILTER
_POSIX_TRACE_EVENT_NAME_MAX
_POSIX_TRACE_INHERIT
_POSIX_TRACE_LOG
_POSIX_TRACE_NAME_MAX
_POSIX_TRACE_SYS_MAX
_POSIX_TRACE_USER_EVENT_MAX
_POSIX_TTY_NAME_MAX
_POSIX_TYPED_MEMORY_OBJECTS
_POSIX_TZNAME_MAX
_POSIX_VERSION
_POSIX_V6_ILP32_OFF32
_POSIX_V6_ILP32_OFFBIG
_POSIX_V6_LP64_OFF64
_POSIX_V6_LPBIG_OFFBIG
_V6_ILP32_OFF32
_V6_ILP32_OFFBIG
_V6_LP64_OFF64
_V6_LPBIG_OFFBIG
RE_DUP_MAX
SCHAR_MAX
SCHAR_MIN
SHRT_MAX
SHRT_MIN
SSIZE_MAX
STREAM_MAX
TMP_MAX
TZNAME_MAX
UCHAR_MAX
UINT_MAX
ULONG_MAX
USHRT_MAX
WORD_BIT
XBS5_ILP32_OFF32
XBS5_ILP32_OFF32_CFLAGS
XBS5_ILP32_OFF32_LDFLAGS
XBS5_ILP32_OFF32_LIBS
XBS5_ILP32_OFF32_LINTFLAGS
XBS5_ILP32_OFFBIG
XBS5_ILP32_OFFBIG_CFLAGS
XBS5_ILP32_OFFBIG_LDFLAGS
XBS5_ILP32_OFFBIG_LIBS
XBS5_ILP32_OFFBIG_LINTFLAGS
XBS5_LP64_OFF64
XBS5_LP64_OFF64_CFLAGS
XBS5_LP64_OFF64_LDFLAGS
XBS5_LP64_OFF64_LIBS
XBS5_LP64_OFF64_LINTFLAGS
XBS5_LPBIG_OFFBIG
XBS5_LPBIG_OFFBIG_CFLAGS
XBS5_LPBIG_OFFBIG_LDFLAGS
XBS5_LPBIG_OFFBIG_LIBS
XBS5_LPBIG_OFFBIG_LINTFLAGS
_XOPEN_CRYPT
_XOPEN_ENH_I18N
_XOPEN_IOV_MAX
_XOPEN_LEGACY
_XOPEN_NAME_MAX
_XOPEN_PATH_MAX
_XOPEN_SHM
_XOPEN_STREAMS
_XOPEN_VERSION
_XOPEN_XCU_VERSION
_XOPEN_XPG2
_XOPEN_XPG3
_XOPEN_XPG4

The symbol PATH also is recognized, yielding the same value as the confstr() name value CS_PATH.

用法

See largefile(5) for the description of the behavior of /usr/bin/getconf when encountering files greater than or equal to 2 Gbyte (231 bytes).

示例

示例 1 Writing the Value of a Variable

This example illustrates the value of {NGROUPS_MAX}:

example% getconf NGROUPS_MAX

示例 2 Writing the Value of a Variable for a Specific Directory

This example illustrates the value of NAME_MAX for a specific directory:

example% getconf NAME_MAX /usr

示例 3 Dealing with Unspecified Results

This example shows how to deal more carefully with results that might be unspecified:

if value=$(getconf PATH_MAX /usr); then
if [ "$value" = "undefined" ]; then
echo PATH_MAX in /usr is infinite.
else
echo PATH_MAX in /usr is $value.
fi
else
echo Error in getconf.
fi

For example:

sysconf(_SC_POSIX_C_BIND);

and

system("getconf POSIX2_C_BIND");

in a C program could give different answers. The sysconf call supplies a value that corresponds to the conditions when the program was either compiled or executed, depending on the implementation. The system call to getconf always supplies a value corresponding to conditions when the program is executed.

环境变量

See environ(5) for descriptions of the following environment variables that affect the execution of getconf: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.

退出状态

The following exit values are returned:

0

The specified variable is valid and information about its current state was written successfully.

>0

An error occurred.

属性

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/core-os
Interface Stability
Committed
Standard

另请参见

sh(1), pathconf(2), sysinfo(2), confstr(3C), sysconf(3C), attributes(5), environ(5), largefile(5), standards(5)