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.Dd May 11, 2016 .Dt PR_GETPEERUCRED 3PROC .Os .Sh NAME .Nm pr_getpeerucred .Nd inject getpeerucred library call into victim process .Sh SYNOPSIS .Lb libproc n libproc.h .Ft int .Fo pr_getpeerucred .Fa "struct ps_prochandle *P" .Fa "int fd" .Fa "ucred_t **ucp" .Fc .Sh DESCRIPTION The .Fn pr_getpeerucred function injects the .Xr getpeerucred 3C library call into the target process .Fa P by means of the agent LWP. If the process handle .Fa P is .Dv NULL then this is equivalent to calling .Xr getpeerucred 3C on the currently running process.

p The arguments .Fa fd and .Fa *ucp have the same meaning as in .Xr getpeerucred 3C . See .Xr getpeerucred 3C for the full description and purpose of the .Sy getpeerucred library call and its arguments.

p The .Fn pr_getpeerucred function only works on active processes. Process handles that correspond to core files, zombie processes, or ELF objects do not support library call injection. .Sh RETURN VALUES Upon successful completion, the .Fn pr_getpeerucred function's return value is that described in .Xr getpeerucred 3C . Otherwise, .Sy -1 is returned and .Sy errno is set to .Er ENOSYS to indicate that the library call could not be injected. .Sh ERRORS For a full list of possible errors see the .Sy ERRORS section in .Xr getpeerucred 3C .

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