sysconf(3) — posix — mips UMIPS RISC/os 4.52



SYSCONF(3-POSIX)    RISC/os Reference Manual     SYSCONF(3-POSIX)



NAME
     sysconf - get configurable system variables

SYNOPSIS
     #include <unistd.h>

     long sysconf(name)
     int name;

DESCRIPTION
     sysconf allows a program to determine the current value of a
     system configurable limit or variable.

     The name argument represents the system variable to be
     queried and can be one of the following:

             name Value           System Variable
             {SCARGMAX}        {ARGMAX}
             {SCCHILDMAX}      {CHILDMAX}
             {SCCLKTCK}        {CLKTCK}
             {SCNGROUPSMAX}    {NGROUPSMAX}
             {SCOPENMAX}       {OPENMAX}
             {SCSTREAMMAX}     {STREAMMAX}
             {SCTZNAMEMAX}     {TZNAMEMAX}
             {SCJOBCONTROL}    {POSIXJOBCONTROL}
             {SCSAVEDIDS}      {POSIXSAVEDIDS}
             {SCVERSION}        {POSIXVERSION}

     The system variables are defined in <limits.h> or
     <unistd.h>.  The symbolic constants that can be used as the
     name value are defined in <unistd.h>.

RETURN VALUES
     If name is an invalid value, sysconf returns -1 and errno is
     set to indicate the error.  If the variable corresponding to
     name is not defined on the system, sysconf returns -1
     without changing errno.

     Otherwise, sysconf returns the current value of the variable
     indicated by name.  The value returned will not be more res-
     trictive than the corresponding value when the program was
     compiled and will not change during the lifetime of the cal-
     ling process.

ERRORS
     If the following condition occurs, sysconf returns -1 and
     sets errno to the corresponding value:

     [EINVAL]            name is invalid.






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