- Commit work from libprocstat project. These patches add support for runtime

  file and processes information retrieval from the running kernel via sysctl
  in the form of new library, libprocstat.  The library also supports KVM backend
  for analyzing memory crash dumps.  Both procstat(1) and fstat(1) utilities have
  been modified to take advantage of the library (as the bonus point the fstat(1)
  utility no longer need superuser privileges to operate), and the procstat(1)
  utility is now able to display information from memory dumps as well.

  The newly introduced fuser(1) utility also uses this library and able to operate
  via sysctl and kvm backends.

  The library is by no means complete (e.g. KVM backend is missing vnode name
  resolution routines, and there're no manpages for the library itself) so I
  plan to improve it further.  I'm commiting it so it will get wider exposure
  and review.

  We won't be able to MFC this work as it relies on changes in HEAD, which
  was introduced some time ago, that break kernel ABI.  OTOH we may be able
  to merge the library with KVM backend if we really need it there.

Discussed with:	rwatson

1 files changed, 5 insertions, 4 deletions

diff --git a/usr.bin/procstat/procstat_bin.c b/usr.bin/procstat/procstat_bin.c
index 8ed5efed9a1a..cf4ca5b4644c 100644
--- a/usr.bin/procstat/procstat_bin.c
+++ b/usr.bin/procstat/procstat_bin.c
@@ -32,6 +32,7 @@
 
 #include <err.h>
 #include <errno.h>
+#include <libprocstat.h>
 #include <limits.h>
 #include <stdio.h>
 #include <string.h>
@@ -39,7 +40,7 @@
 #include "procstat.h"
 
 void
-procstat_bin(pid_t pid, struct kinfo_proc *kipp)
+procstat_bin(struct kinfo_proc *kipp)
 {
 	char pathname[PATH_MAX];
 	int error, name[4];
@@ -51,12 +52,12 @@ procstat_bin(pid_t pid, struct kinfo_proc *kipp)
 	name[0] = CTL_KERN;
 	name[1] = KERN_PROC;
 	name[2] = KERN_PROC_PATHNAME;
-	name[3] = pid;
+	name[3] = kipp->ki_pid;
 
 	len = sizeof(pathname);
 	error = sysctl(name, 4, pathname, &len, NULL, 0);
 	if (error < 0 && errno != ESRCH) {
-		warn("sysctl: kern.proc.pathname: %d", pid);
+		warn("sysctl: kern.proc.pathname: %d", kipp->ki_pid);
 		return;
 	}
 	if (error < 0)
@@ -64,7 +65,7 @@ procstat_bin(pid_t pid, struct kinfo_proc *kipp)
 	if (len == 0 || strlen(pathname) == 0)
 		strcpy(pathname, "-");
 
-	printf("%5d ", pid);
+	printf("%5d ", kipp->ki_pid);
 	printf("%-16s ", kipp->ki_comm);
 	printf("%s\n", pathname);
 }