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/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:
-a
-vspecification
The following operands are supported:
path_var
LINK_MAX | NAME_MAX | _POSIX_CHOWN_RESTRICTED |
MAX_CANON | PATH_MAX | _POSIX_NO_TRUNC |
MAX_INPUT |
pathname
system_var
ARG_MAX | BC_BASE_MAX |
BC_DIM_MAX | BC_SCALE_MAX |
BC_STRING_MAX | |
CHARCLASS_NAME_MAX | |
CHAR_MIN | |
CLK_TCK | |
CS_PATH | |
HOST_NAME_MAX | |
INT_MIN | |
LFS64_LDFLAGS | |
LFS64_LINTFLAGS | |
LFS_LDFLAGS | |
LFS_LINTFLAGS | |
LONG_BIT | |
LONG_MIN | |
NGROUPS_MAX | |
NL_LANGMAX | |
NL_NMAX | |
NL_TEXTMAX | |
OPEN_MAX | |
POSIX2_BC_DIM_MAX | |
POSIX2_BC_STRING_MAX | |
POSIX2_C_DEV | |
POSIX2_COLL_WEIGHTS_MAX | |
POSIX2_EXPR_NEST_MAX | |
POSIX2_FORT_RUN | |
POSIX2_LOCALEDEF | |
POSIX2_SW_DEV | |
POSIX2_UPE | |
POSIX_ALLOC_SIZE_MIN | |
POSIX_REC_MAX_XFER_SIZE | |
POSIX_REC_XFER_ALIGN | |
POSIX_V6_ILP32_OFF32_CFLAGS | |
POSIX_V6_ILP32_OFF32_LIBS | |
POSIX_V6_ILP32_OFFBIG_CFLAGS | |
POSIX_V6_ILP32_OFFBIG_LIBS | |
POSIX_V6_LP64_OFF64_CFLAGS | |
POSIX_V6_LP64_OFF64_LIBS | |
POSIX_V6_LPBIG_OFFBIG_CFLAGS | |
POSIX_V6_LPBIG_OFFBIG_LIBS | |
SYMLINK_MAX | |
_POSIX2_BC_BASE_MAX | |
_POSIX2_BC_SCALE_MAX | |
_POSIX2_CHARCLASS_NAME_MAX | |
_POSIX2_COLL_WEIGHTS_MAX | |
_POSIX2_C_DEV | |
_POSIX2_EXPR_NEST_MAX | |
_POSIX2_FORT_RUN | |
_POSIX2_LOCALEDEF | |
_POSIX2_PBS_ACCOUNTING | |
_POSIX2_PBS_LOCATE | |
_POSIX2_PBS_TRACK | |
_POSIX2_SW_DEV | |
_POSIX2_VERSION | |
_POSIX_AIO_LISTIO_MAX | |
_POSIX_ARG_MAX | |
_POSIX_BARRIERS | |
_POSIX_CLOCKRES_MIN | |
_POSIX_CPUTIME | |
_POSIX_HOST_NAME_MAX | |
_POSIX_JOB_CONTROL | |
_POSIX_LOGIN_NAME_MAX | |
_POSIX_MAX_INPUT | |
_POSIX_MQ_OPEN_MAX | |
_POSIX_NAME_MAX | |
_POSIX_OPEN_MAX | |
_POSIX_PIPE_BUF | |
_POSIX_RAW_SOCKETS | |
_POSIX_REGEXP | |
_POSIX_RTSIG_MAX | |
_POSIX_SEM_NSEMS_MAX | |
_POSIX_SHELL | |
_POSIX_SPAWN | |
_POSIX_SPORADIC_SERVER | |
_POSIX_SS_REPL_MAX | |
_POSIX_SYMLINK_MAX | |
_POSIX_SYNC_IO | |
_POSIX_THREAD_ATTR_STACKSIZE | |
_POSIX_THREAD_DESTRUCTOR_ITERATIONS | |
_POSIX_THREAD_PRIORITY_SCHEDULING | |
_POSIX_THREAD_PRIO_PROTECT | |
_POSIX_THREAD_SAFE_FUNCTIONS | |
_POSIX_THREAD_THREADS_MAX | |
_POSIX_TIMER_MAX | |
_POSIX_TRACE_EVENT_FILTER | |
_POSIX_TRACE_INHERIT | |
_POSIX_TRACE_NAME_MAX | |
_POSIX_TRACE_USER_EVENT_MAX | |
_POSIX_TYPED_MEMORY_OBJECTS | |
_POSIX_VERSION | |
_POSIX_V6_ILP32_OFFBIG | |
_POSIX_V6_LPBIG_OFFBIG | |
_V6_ILP32_OFFBIG | |
_V6_LPBIG_OFFBIG | |
SCHAR_MAX | |
SHRT_MAX | |
SSIZE_MAX | |
TMP_MAX | |
UCHAR_MAX | |
ULONG_MAX | |
WORD_BIT | |
XBS5_ILP32_OFF32_CFLAGS | |
XBS5_ILP32_OFF32_LIBS | |
XBS5_ILP32_OFFBIG | |
XBS5_ILP32_OFFBIG_LDFLAGS | |
XBS5_ILP32_OFFBIG_LINTFLAGS | |
XBS5_LP64_OFF64_CFLAGS | |
XBS5_LP64_OFF64_LIBS | |
XBS5_LPBIG_OFFBIG | |
XBS5_LPBIG_OFFBIG_LDFLAGS | |
XBS5_LPBIG_OFFBIG_LINTFLAGS | |
_XOPEN_ENH_I18N | |
_XOPEN_LEGACY | |
_XOPEN_PATH_MAX | |
_XOPEN_STREAMS | |
_XOPEN_XCU_VERSION | |
_XOPEN_XPG3 |
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 ( 2^31 bytes).
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 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:
0
>0
See attributes(5) for descriptions of the following attributes:
|
pathconf(2), confstr(3C), sysconf(3C), attributes(5), environ(5), largefile(5), standards(5)