minix/lib/libc/sys-minix/ptrace.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

25 lines
621 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <sys/ptrace.h>
int ptrace(int req, pid_t pid, void *addr, int data)
{
message m;
memset(&m, 0, sizeof(m));
m.PM_PTRACE_PID = pid;
m.PM_PTRACE_REQ = req;
m.PM_PTRACE_ADDR = addr;
m.PM_PTRACE_DATA = data;
if (_syscall(PM_PROC_NR, PM_PTRACE, &m) < 0) return(-1);
/* There was no error, but -1 is a legal return value. Clear errno if
* necessary to distinguish this case. _syscall has set errno to nonzero
* for the error case.
*/
if (m.PM_PTRACE_DATA == -1) errno = 0;
return(m.PM_PTRACE_DATA);
}