Author: trociny
Date: Fri Mar 23 20:05:41 2012
New Revision: 233389
URL: http://svn.freebsd.org/changeset/base/233389
Log:
Add a sysctl to set and retrieve binary osreldate of another process.
Suggested by: kib
Reviewed by: kib
MFC after: 2 weeks
Modified:
head/sys/kern/kern_proc.c
head/sys/sys/sysctl.h
Modified: head/sys/kern/kern_proc.c
==============================================================================
--- head/sys/kern/kern_proc.c Fri Mar 23 19:37:45 2012 (r233388)
+++ head/sys/kern/kern_proc.c Fri Mar 23 20:05:41 2012 (r233389)
@@ -2499,6 +2499,52 @@ sysctl_kern_proc_umask(SYSCTL_HANDLER_AR
return (error);
}
+/*
+ * This sysctl allows a process to set and retrieve binary osreldate of
+ * another process.
+ */
+static int
+sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
+{
+ int *name = (int *)arg1;
+ u_int namelen = arg2;
+ struct proc *p;
+ int flags, error, osrel;
+
+ if (namelen != 1)
+ return (EINVAL);
+
+ if (req->newptr != NULL && req->newlen != sizeof(osrel))
+ return (EINVAL);
+
+ flags = PGET_HOLD | PGET_NOTWEXIT;
+ if (req->newptr != NULL)
+ flags |= PGET_CANDEBUG;
+ else
+ flags |= PGET_CANSEE;
+ error = pget((pid_t)name[0], flags, &p);
+ if (error != 0)
+ return (error);
+
+ error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
+ if (error != 0)
+ goto errout;
+
+ if (req->newptr != NULL) {
+ error = SYSCTL_IN(req, &osrel, sizeof(osrel));
+ if (error != 0)
+ goto errout;
+ if (osrel < 0) {
+ error = EINVAL;
+ goto errout;
+ }
+ p->p_osrel = osrel;
+ }
+errout:
+ PRELE(p);
+ return (error);
+}
+
SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
@@ -2603,3 +2649,7 @@ static SYSCTL_NODE(_kern_proc, KERN_PROC
static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RD |
CTLFLAG_MPSAFE, sysctl_kern_proc_umask, "Process umask");
+
+static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
+ CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
+ "Process binary osreldate");
Modified: head/sys/sys/sysctl.h
==============================================================================
--- head/sys/sys/sysctl.h Fri Mar 23 19:37:45 2012 (r233388)
+++ head/sys/sys/sysctl.h Fri Mar 23 20:05:41 2012 (r233389)
@@ -565,6 +565,7 @@ SYSCTL_ALLOWED_TYPES(UINT64, uint64_t *a
#define KERN_PROC_RLIMIT 37 /* process resource limits */
#define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */
#define KERN_PROC_UMASK 39 /* process umask */
+#define KERN_PROC_OSREL 40 /* osreldate for process binary
*/
/*
* KERN_IPC identifiers
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