Open System Services Shell and Utilities Reference Manual (G06.28+, H06.05+)

getconf(1) OSS Shell and Utilities Reference Manual
EXPR_NEST_MAX
The maximum number of expressions that can be nested within parentheses by the
expr command.
LINE_MAX
The maximum length, in bytes, of a command’s input line (either standard input or
another file) when the utility is described as processing text files. The length includes
room for the trailing newline character.
NGROUPS_MAX
The maximum number of simultaneous supplementary group IDs for each process.
OPEN_MAX
The maximum number of files that one process can have open at one time.
PAGE_SIZE
The page size granularity for memory regions.
PASS_MAX
The maximum number of characters returned by getpass() (not including terminating
null).
PATH A value for the PATH environment variable that finds all standard utilities.
RE_DUP_MAX
The maximum number of repeated occurrences of a regular expression permitted when
using the interval-notation parameters, such as the m and n parameters, with the ed
command.
STREAM_MAX
The number of streams that one process can have open at one time.
TZNAME_MAX
The maximum number of bytes supported for the name of a time zone (not the length of
the TZ environmental variable).
System Standards Configuration Variables
System standards configuration variables contain the minimum values required by a particular
system standard. The prefixes POSIX_, POSIX2_, and XOPEN indicate that the variable con-
tains the minimum value for a system characteristic required by the POSIX 1003.1, POSIX
1003.2, and X/Open system standards, respectively. System standards are system-wide
minimums that the system meets to support the particular system standard. Actual configuration
values may exceed these standards. The system standards configuration variables for the getconf
command are defined as follows:
POSIX_ARG_MAX
The length of the arguments for one of the exec functions, in bytes, including environ-
ment data.
POSIX_CHILD_MAX
The maximum number of simultaneous processes for each real user ID.
POSIX_JOB_CONTROL
This variable has a value of 1 if the system supports job control; otherwise, the variable
is undefined.
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