PSETRUN(3PROC) Process Control Library Functions PSETRUN(3PROC)

NAME


Psetrun, Lsetrun - run a stopped process or thread

LIBRARY


Process Control Library (libproc, -lproc)

SYNOPSIS


#include <libproc.h>

int
Psetrun(struct ps_prochandle *P, int sig, int flags);

int
Lsetrun(struct ps_lwphandle *L, int sig, int flags);

DESCRIPTION


The Psetrun() function resumes the stopped process handle P and transitions
the process to running. If sig is non-zero, then the Psetrun() function
causes the signal to be delivered. See signal.h(3HEAD) for a list of valid
signal identifiers.

The flags member modifies the behavior of the resumed handle. The
following values may be combined by a bitwise-inclusive-OR:

PRCSIG Clears the current signal, if any.

PRCFAULT Clears the current fault, if any.

PRSTEP Indicates that the thread should single-step over the
next machine instruction and upon completion, inject a
trap. For the specific mechanics of single-stepping
and what traps or signals will be injected, see the
PRSTEP section of proc(4).

PRSABORT Indicates that the thread should abort the system call
that it is currently executing. This is only valid if
the thread is stopped because it is asleep or right
before a system call. This will cause the system call
to return EINTR.

If both PRCSIG is specified and sig is non-zero, then the PRCSIG request
takes priority, and it will be treated as though sig was passed the
argument 0.

When the process is resumed all extent tracing flags and register changes
will be synchronized with the process. For more information on resuming a
thread see the PCRUN section in proc(4).

Note, the Psetrun() function is only valid for active processes. It will
fail on process handles that refer to core files, zombie processes, and ELF
objects.

The Lsetrun() function is equivalent to the Psetrun() function, except
rather than operating on a process it operates on a thread. Lsetrun()
causes the specified thread, L, to resume execution. Whereas Psetrun()
causes all threads in the process to resume.

RETURN VALUES


Upon successful completion, the Psetrun() and Lsetrun() functions return 0.
Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS


For a full list of possible errors see the DIAGNOSTICS section in proc(4).

The Psetrun() and Lsetrun() functions will fail if:

EBUSY The process handle P is not currently stopped or it is
not stopped due to an event of interest, a directed
stop, or it is asleep in a system call.

INTERFACE STABILITY


Uncommitted

MT-LEVEL
See LOCKING in libproc(3LIB).

SEE ALSO


signal.h(3HEAD), libproc(3LIB), Pstatus(3PROC), proc(4)

illumos May 11, 2016 illumos