nullptr(3X)                                                     nullptr(3X)

NAME
     nullptr - null pointer control

SYNOPSIS
     cc [flag ...] file ... -lext [library ...]

     #include <sys/sysmips.h>

     void nullptrcontrol(int trapnullptrs, int inherit);

DESCRIPTION
     nullptr controls how null pointers are treated for this process and/or
     its descendants. By default read references to address 0 (such as
     dereferencing a null pointer) are silently satisfied by the kernel.
     nullptrcontrol allows the user control over this effect for specific
     processes and their descendants.

     If the first argument, trapnullptrs, is non-zero, dereferences of
     address 0 will not be satisfied for this process. This will typically
     generate a SIGSEGV signal.

     If the first argument, trapnullptrs, is zero, dereferences of address
     0 are satisfied for this process. This is the default.

     If the second argument, inherit, is set, the value of the first argu-
     ment is propagated to the processes children in addition to effecting
     the process.

RETURN VALUE
     A return value of 0 is expected. A return value of -1 means some
     unknown error occurred.

SEE ALSO
     launchit(1M).





















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