1 files changed, 504 insertions, 0 deletions

diff --git a/bin/ps/ps.c b/bin/ps/ps.c
new file mode 100644
index 000000000000..06d1d5f22a0b
--- /dev/null
+++ b/bin/ps/ps.c
@@ -0,0 +1,504 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1990, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)ps.c	8.4 (Berkeley) 4/2/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/sysctl.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <nlist.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ps.h"
+
+#ifdef P_PPWAIT
+#define NEWVM
+#endif
+
+KINFO *kinfo;
+struct varent *vhead, *vtail;
+
+int	eval;			/* exit value */
+int	rawcpu;			/* -C */
+int	sumrusage;		/* -S */
+int	termwidth;		/* width of screen (0 == infinity) */
+int	totwidth;		/* calculated width of requested variables */
+
+static int needuser, needcomm, needenv;
+
+enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
+
+static char	*fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int),
+		    KINFO *, char *, int));
+static char	*kludge_oldps_options __P((char *));
+static int	 pscomp __P((const void *, const void *));
+static void	 saveuser __P((KINFO *));
+static void	 scanvars __P((void));
+static void	 usage __P((void));
+
+char dfmt[] = "pid tt state time command";
+char jfmt[] = "user pid ppid pgid sess jobc state tt time command";
+char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command";
+char   o1[] = "pid";
+char   o2[] = "tt state time command";
+char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command";
+char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command";
+
+kvm_t *kd;
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct kinfo_proc *kp;
+	struct varent *vent;
+	struct winsize ws;
+	dev_t ttydev;
+	pid_t pid;
+	uid_t uid;
+	int all, ch, flag, i, fmt, lineno, nentries;
+	int prtheader, wflag, what, xflg;
+	char *nlistf, *memf, *swapf, errbuf[256];
+
+	if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
+	     ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
+	     ioctl(STDIN_FILENO,  TIOCGWINSZ, (char *)&ws) == -1) ||
+	     ws.ws_col == 0)
+		termwidth = 79;
+	else
+		termwidth = ws.ws_col - 1;
+
+	if (argc > 1)
+		argv[1] = kludge_oldps_options(argv[1]);
+
+	all = fmt = prtheader = wflag = xflg = 0;
+	pid = -1;
+	uid = (uid_t) -1;
+	ttydev = NODEV;
+	memf = nlistf = swapf = NULL;
+	while ((ch = getopt(argc, argv,
+	    "aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF)
+		switch((char)ch) {
+		case 'a':
+			all = 1;
+			break;
+		case 'e':			/* XXX set ufmt */
+			needenv = 1;
+			break;
+		case 'C':
+			rawcpu = 1;
+			break;
+		case 'g':
+			break;			/* no-op */
+		case 'h':
+			prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
+			break;
+		case 'j':
+			parsefmt(jfmt);
+			fmt = 1;
+			jfmt[0] = '\0';
+			break;
+		case 'L':
+			showkey();
+			exit(0);
+		case 'l':
+			parsefmt(lfmt);
+			fmt = 1;
+			lfmt[0] = '\0';
+			break;
+		case 'M':
+			memf = optarg;
+			break;
+		case 'm':
+			sortby = SORTMEM;
+			break;
+		case 'N':
+			nlistf = optarg;
+			break;
+		case 'O':
+			parsefmt(o1);
+			parsefmt(optarg);
+			parsefmt(o2);
+			o1[0] = o2[0] = '\0';
+			fmt = 1;
+			break;
+		case 'o':
+			parsefmt(optarg);
+			fmt = 1;
+			break;
+		case 'p':
+			pid = atol(optarg);
+			xflg = 1;
+			break;
+		case 'r':
+			sortby = SORTCPU;
+			break;
+		case 'S':
+			sumrusage = 1;
+			break;
+		case 'T':
+			if ((optarg = ttyname(STDIN_FILENO)) == NULL)
+				errx(1, "stdin: not a terminal");
+			/* FALLTHROUGH */
+		case 't': {
+			struct stat sb;
+			char *ttypath, pathbuf[MAXPATHLEN];
+
+			if (strcmp(optarg, "co") == 0)
+				ttypath = _PATH_CONSOLE;
+			else if (*optarg != '/')
+				(void)snprintf(ttypath = pathbuf,
+				    sizeof(pathbuf), "%s%s", _PATH_TTY, optarg);
+			else
+				ttypath = optarg;
+			if (stat(ttypath, &sb) == -1)
+				err(1, "%s", ttypath);
+			if (!S_ISCHR(sb.st_mode))
+				errx(1, "%s: not a terminal", ttypath);
+			ttydev = sb.st_rdev;
+			break;
+		}
+		case 'u':
+			parsefmt(ufmt);
+			sortby = SORTCPU;
+			fmt = 1;
+			ufmt[0] = '\0';
+			break;
+		case 'v':
+			parsefmt(vfmt);
+			sortby = SORTMEM;
+			fmt = 1;
+			vfmt[0] = '\0';
+			break;
+		case 'W':
+			swapf = optarg;
+			break;
+		case 'w':
+			if (wflag)
+				termwidth = UNLIMITED;
+			else if (termwidth < 131)
+				termwidth = 131;
+			wflag++;
+			break;
+		case 'x':
+			xflg = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+#define	BACKWARD_COMPATIBILITY
+#ifdef	BACKWARD_COMPATIBILITY
+	if (*argv) {
+		nlistf = *argv;
+		if (*++argv) {
+			memf = *argv;
+			if (*++argv)
+				swapf = *argv;
+		}
+	}
+#endif
+	/*
+	 * Discard setgid privileges if not the running kernel so that bad
+	 * guys can't print interesting stuff from kernel memory.
+	 */
+	if (nlistf != NULL || memf != NULL || swapf != NULL)
+		setgid(getgid());
+
+	kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
+	if (kd == 0)
+		errx(1, "%s", errbuf);
+
+	if (!fmt)
+		parsefmt(dfmt);
+
+	if (!all && ttydev == NODEV && pid == -1)  /* XXX - should be cleaner */
+		uid = getuid();
+
+	/*
+	 * scan requested variables, noting what structures are needed,
+	 * and adjusting header widths as appropiate.
+	 */
+	scanvars();
+	/*
+	 * get proc list
+	 */
+	if (uid != (uid_t) -1) {
+		what = KERN_PROC_UID;
+		flag = uid;
+	} else if (ttydev != NODEV) {
+		what = KERN_PROC_TTY;
+		flag = ttydev;
+	} else if (pid != -1) {
+		what = KERN_PROC_PID;
+		flag = pid;
+	} else {
+		what = KERN_PROC_ALL;
+		flag = 0;
+	}
+	/*
+	 * select procs
+	 */
+	if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0)
+		errx(1, "%s", kvm_geterr(kd));
+	if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
+		err(1, NULL);
+	for (i = nentries; --i >= 0; ++kp) {
+		kinfo[i].ki_p = kp;
+		if (needuser)
+			saveuser(&kinfo[i]);
+	}
+	/*
+	 * print header
+	 */
+	printheader();
+	if (nentries == 0)
+		exit(0);
+	/*
+	 * sort proc list
+	 */
+	qsort(kinfo, nentries, sizeof(KINFO), pscomp);
+	/*
+	 * for each proc, call each variable output function.
+	 */
+	for (i = lineno = 0; i < nentries; i++) {
+		if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV ||
+		    (KI_PROC(&kinfo[i])->p_flag & P_CONTROLT ) == 0))
+			continue;
+		for (vent = vhead; vent; vent = vent->next) {
+			(vent->var->oproc)(&kinfo[i], vent);
+			if (vent->next != NULL)
+				(void)putchar(' ');
+		}
+		(void)putchar('\n');
+		if (prtheader && lineno++ == prtheader - 4) {
+			(void)putchar('\n');
+			printheader();
+			lineno = 0;
+		}
+	}
+	exit(eval);
+}
+
+static void
+scanvars()
+{
+	struct varent *vent;
+	VAR *v;
+	int i;
+
+	for (vent = vhead; vent; vent = vent->next) {
+		v = vent->var;
+		i = strlen(v->header);
+		if (v->width < i)
+			v->width = i;
+		totwidth += v->width + 1;	/* +1 for space */
+		if (v->flag & USER)
+			needuser = 1;
+		if (v->flag & COMM)
+			needcomm = 1;
+	}
+	totwidth--;
+}
+
+static char *
+fmt(fn, ki, comm, maxlen)
+	char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int));
+	KINFO *ki;
+	char *comm;
+	int maxlen;
+{
+	char *s;
+
+	if ((s =
+	    fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL)
+		err(1, NULL);
+	return (s);
+}
+
+static void
+saveuser(ki)
+	KINFO *ki;
+{
+	struct pstats pstats;
+	struct usave *usp;
+
+	usp = &ki->ki_u;
+	if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats,
+	    (char *)&pstats, sizeof(pstats)) == sizeof(pstats)) {
+		/*
+		 * The u-area might be swapped out, and we can't get
+		 * at it because we have a crashdump and no swap.
+		 * If it's here fill in these fields, otherwise, just
+		 * leave them 0.
+		 */
+		usp->u_start = pstats.p_start;
+		usp->u_ru = pstats.p_ru;
+		usp->u_cru = pstats.p_cru;
+		usp->u_valid = 1;
+	} else
+		usp->u_valid = 0;
+	/*
+	 * save arguments if needed
+	 */
+	if (needcomm)
+		ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm,
+		    MAXCOMLEN);
+	else
+		ki->ki_args = NULL;
+	if (needenv)
+		ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0);
+	else
+		ki->ki_env = NULL;
+}
+
+static int
+pscomp(a, b)
+	const void *a, *b;
+{
+	int i;
+#ifdef NEWVM
+#define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \
+		  KI_EPROC(k)->e_vm.vm_tsize)
+#else
+#define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize)
+#endif
+
+	if (sortby == SORTCPU)
+		return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a));
+	if (sortby == SORTMEM)
+		return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a));
+	i =  KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev;
+	if (i == 0)
+		i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid;
+	return (i);
+}
+
+/*
+ * ICK (all for getopt), would rather hide the ugliness
+ * here than taint the main code.
+ *
+ *  ps foo -> ps -foo
+ *  ps 34 -> ps -p34
+ *
+ * The old convention that 't' with no trailing tty arg means the users
+ * tty, is only supported if argv[1] doesn't begin with a '-'.  This same
+ * feature is available with the option 'T', which takes no argument.
+ */
+static char *
+kludge_oldps_options(s)
+	char *s;
+{
+	size_t len;
+	char *newopts, *ns, *cp;
+
+	len = strlen(s);
+	if ((newopts = ns = malloc(len + 2)) == NULL)
+		err(1, NULL);
+	/*
+	 * options begin with '-'
+	 */
+	if (*s != '-')
+		*ns++ = '-';	/* add option flag */
+	/*
+	 * gaze to end of argv[1]
+	 */
+	cp = s + len - 1;
+	/*
+	 * if last letter is a 't' flag with no argument (in the context
+	 * of the oldps options -- option string NOT starting with a '-' --
+	 * then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)).
+	 */
+	if (*cp == 't' && *s != '-')
+		*cp = 'T';
+	else {
+		/*
+		 * otherwise check for trailing number, which *may* be a
+		 * pid.
+		 */
+		while (cp >= s && isdigit(*cp))
+			--cp;
+	}
+	cp++;
+	memmove(ns, s, (size_t)(cp - s));	/* copy up to trailing number */
+	ns += cp - s;
+	/*
+	 * if there's a trailing number, and not a preceding 'p' (pid) or
+	 * 't' (tty) flag, then assume it's a pid and insert a 'p' flag.
+	 */
+	if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' &&
+	    (cp - 1 == s || cp[-2] != 't')))
+		*ns++ = 'p';
+	(void)strcpy(ns, cp);		/* and append the number */
+
+	return (newopts);
+}
+
+static void
+usage()
+{
+
+	(void)fprintf(stderr,
+	    "usage:\t%s\n\t   %s\n\t%s\n",
+	    "ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]",
+	    "[-M core] [-N system] [-W swap]",
+	    "ps [-L]");
+	exit(1);
+}