Name | Synopsis | Description | Options | Operands | Usage | Examples | Environment Variables | Exit Status | Attributes | See Also
/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
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 specified 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.
The following options are supported:
Writes the names of the current system configuration variables to the standard output.
Gives the specification which governs the selection of values for configuration variables.
The following operands are supported:
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 |
A path name for which the variable specified by path_var is to be determined.
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_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.
See largefile(5) for the description of the behavior of getconf when encountering files greater than or equal to 2 Gbyte ( 231 bytes).
This example illustrates the value of {NGROUPS_MAX}:
example% getconf NGROUPS_MAX |
This example illustrates the value of NAME_MAX for a specific directory:
example% getconf NAME_MAX /usr |
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 conditions when the program is executed.
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.
The following exit values are returned:
The specified variable is valid and information about its current state was written successfully.
An error occurred.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE |
ATTRIBUTE VALUE |
---|---|
Availability |
SUNWcsu |
Interface Stability |
Standard |
Name | Synopsis | Description | Options | Operands | Usage | Examples | Environment Variables | Exit Status | Attributes | See Also