usr.bin/procstat

Add -l flag to display resource limits.

PR:		bin/161257
Reviewed by:	kib
MFC after:	2 weeks

usr.bin/procstat/Makefile

@@ -10,6 +10,7 @@ SRCS=	procstat.c		\
 	procstat_cred.c		\
 	procstat_files.c	\
 	procstat_kstack.c	\
+	procstat_rlimit.c	\
 	procstat_sigs.c		\
 	procstat_threads.c	\
 	procstat_vm.c

usr.bin/procstat/procstat.1

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 22, 2011
+.Dd November 24, 2011
 .Dt PROCSTAT 1
 .Os
 .Sh NAME
@@ -69,6 +69,8 @@ Display the stacks of kernel threads in the process, excluding stacks of
 threads currently running on a CPU and threads with stacks swapped to disk.
 If the flag is repeated, function offsets as well as function names are
 printed.
+.It Fl l
+Display resource limits for the process.
 .It Fl s
 Display security credential information for the process.
 .It Fl t

usr.bin/procstat/procstat.c

@@ -39,8 +39,8 @@
 
 #include "procstat.h"
 
-static int aflag, bflag, cflag, eflag, fflag, iflag, jflag, kflag, sflag, tflag;
-static int vflag, xflag;
+static int aflag, bflag, cflag, eflag, fflag, iflag, jflag, kflag, lflag, sflag;
+static int tflag, vflag, xflag;
 int	hflag, nflag, Cflag;
 
 static void
@@ -50,7 +50,7 @@ usage(void)
 	fprintf(stderr, "usage: procstat [-h] [-C] [-M core] [-N system] "
 	    "[-w interval] \n");
 	fprintf(stderr, "                [-b | -c | -e | -f | -i | -j | -k | "
-	    "-s | -t | -v | -x] [-a | pid ...]\n");
+	    "-l | -s | -t | -v | -x] [-a | pid ...]\n");
 	exit(EX_USAGE);
 }
 
@@ -72,6 +72,8 @@ procstat(struct procstat *prstat, struct kinfo_proc *kipp)
 		procstat_threads_sigs(prstat, kipp);
 	else if (kflag)
 		procstat_kstack(kipp, kflag);
+	else if (lflag)
+		procstat_rlimit(kipp);
 	else if (sflag)
 		procstat_cred(kipp);
 	else if (tflag)
@@ -123,7 +125,7 @@ main(int argc, char *argv[])
 
 	interval = 0;
 	memf = nlistf = NULL;
-	while ((ch = getopt(argc, argv, "CN:M:abcefijkhstvw:x")) != -1) {
+	while ((ch = getopt(argc, argv, "CN:M:abcefijklhstvw:x")) != -1) {
 		switch (ch) {
 		case 'C':
 			Cflag++;
@@ -167,6 +169,10 @@ main(int argc, char *argv[])
 			kflag++;
 			break;
 
+		case 'l':
+			lflag++;
+			break;
+
 		case 'n':
 			nflag++;
 			break;
@@ -210,8 +216,8 @@ main(int argc, char *argv[])
 	argv += optind;
 
 	/* We require that either 0 or 1 mode flags be set. */
-	tmp = bflag + cflag + eflag + fflag + (kflag ? 1 : 0) + sflag + tflag +
-	    vflag + xflag;
+	tmp = bflag + cflag + eflag + fflag + (kflag ? 1 : 0) + lflag + sflag +
+	    tflag + vflag + xflag;
 	if (!(tmp == 0 || tmp == 1))
 		usage();
 

usr.bin/procstat/procstat.h

@@ -42,6 +42,7 @@ void	procstat_cred(struct kinfo_proc *kipp);
 void	procstat_env(struct kinfo_proc *kipp);
 void	procstat_files(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_kstack(struct kinfo_proc *kipp, int kflag);
+void	procstat_rlimit(struct kinfo_proc *kipp);
 void	procstat_sigs(struct procstat *prstat, struct kinfo_proc *kipp);
 void	procstat_threads(struct kinfo_proc *kipp);
 void	procstat_threads_sigs(struct procstat *prstat, struct kinfo_proc *kipp);

usr.bin/procstat/procstat_rlimit.c

@@ -0,0 +1,78 @@
+/*-
+ * Copyright (c) 2011 Mikolaj Golub
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#define _RLIMIT_IDENT
+#include <sys/resourcevar.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+
+#include <err.h>
+#include <errno.h>
+#include <libprocstat.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "procstat.h"
+
+static struct rlimit rlimit[RLIM_NLIMITS];
+
+void
+procstat_rlimit(struct kinfo_proc *kipp)
+{
+	int error, i, name[4];
+	size_t len;
+
+	if (!hflag)
+		printf("%5s %-16s %-10s %12s %12s\n", "PID", "COMM", "RLIMIT",
+		    "CURRENT", "MAX");
+	name[0] = CTL_KERN;
+	name[1] = KERN_PROC;
+	name[2] = KERN_PROC_RLIMIT;
+	name[3] = kipp->ki_pid;
+	len = sizeof(rlimit);
+	error = sysctl(name, 4, rlimit, &len, NULL, 0);
+	if (error < 0 && errno != ESRCH) {
+		warn("sysctl: kern.proc.rlimit: %d", kipp->ki_pid);
+		return;
+	}
+	if (error < 0 || len != sizeof(rlimit))
+		return;
+
+	for (i = 0; i < RLIM_NLIMITS; i++) {
+		printf("%5d %-16s %-10s %12jd %12jd\n", kipp->ki_pid,
+		    kipp->ki_comm, rlimit_ident[i],
+		    rlimit[i].rlim_cur == RLIM_INFINITY ?
+		    -1 : rlimit[i].rlim_cur,
+		    rlimit[i].rlim_max == RLIM_INFINITY ?
+		    -1 : rlimit[i].rlim_max);
+        }
+}