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.Dd May 11, 2016 .Dt PR_GETTASKID 3PROC .Os .Sh NAME .Nm pr_gettaskid .Nd inject gettaskid system call into victim process .Sh SYNOPSIS .Lb libproc n libproc.h .Ft taskid_t .Fo pr_gettaskid .Fa "struct ps_prochandle *P" .Fc .Sh DESCRIPTION The .Fn pr_gettaskid function injects the .Xr gettaskid 2 system call into the target process .Fa P by means of the agent LWP. If the process handle .Fa P is the value .Dv NULL then this will be equivalent to calling .Xr gettaskid 2 on the currently running process.

p The .Fn pr_gettaskid function only works on active processes. Process handles that correspond to core files, zombie processes, or ELF objects do not support system call injection. .Sh RETURN VALUES Upon successful completion, the .Fn pr_gettaskid function's return value is that described in .Xr gettaskid 2 . Otherwise, .Sy -1 is returned and .Sy errno is set to .Er ENOSYS to indicate that the system call could not be injected. .Sh ERRORS For the full list of errors see the .Sy ERRORS section in .Xr gettaskid 2 .

p The .Fn pr_gettaskid function will fail if: l -tag -width Er t Er ENOSYS An error occurred while trying to invoke the agent LWP and inject a system call in the process handle .Fa P or the process handle .Fa P does not support system call injection. .El .Sh INTERFACE STABILITY .Sy Uncommitted .Sh MT-LEVEL See .Sy LOCKING in .Xr libproc 3LIB . .Sh SEE ALSO .Xr gettaskid 2 , .Xr libproc 3LIB , .Xr proc 4