getconf(1) User Commands getconf(1)
NAME
getconf - get configuration values
SYNOPSIS
/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
DESCRIPTION
In the first synopsis form, the getconf utility will write 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 will write to the standard output the value of the variable specified by path_var for the path speci-
fied by pathname, in accordance with specification if the -v option is used.
In the third synopsis form, config will write to the standard output the names of the current system configuration variables.
The value of each configuration variable will be determined as if it were obtained by calling the function from which it is defined to be
available. The value will reflect conditions in the current operating environment.
OPTIONS
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.
OPERANDS
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 follow-
ing 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 fol-
lowing 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_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_TRACE _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.
USAGE
See largefile(5) for the description of the behavior of getconf when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).
EXAMPLES
Example 1: Writing the value of a variable
This example illustrates the value of {NGROUPS_MAX}:
example% getconf NGROUPS_MAX
Example 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
Example 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
Notice that
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 condi-
tions when the program is executed.
ENVIRONMENT VARIABLES
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.
EXIT STATUS
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.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
pathconf(2), confstr(3C), sysconf(3C), attributes(5), environ(5), largefile(5), standards(5)
SunOS 5.10 9 Apr 2004 getconf(1)
