Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106

5 files changed, 763 insertions, 0 deletions

diff --git a/system_cmds/atrun.tproj/atrun.8 b/system_cmds/atrun.tproj/atrun.8
new file mode 100644
index 0000000..bc80f6b
--- /dev/null
+++ b/system_cmds/atrun.tproj/atrun.8
@@ -0,0 +1,75 @@
+.\"
+.\" Copyright (c) 1993 Christopher G. Demetriou
+.\" 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 Christopher G. Demetriou.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+.\"
+.\"	$Id: atrun.8,v 1.1 1999/05/02 04:21:19 wsanchez Exp $
+.\"
+.Dd March 9, 2008
+.Dt ATRUN 8
+.Os "Mac OS X"
+.Sh NAME
+.Nm atrun
+.Nd run jobs queued for later execution
+.Sh SYNOPSIS
+.Nm atrun
+.Sh DESCRIPTION
+The
+.Nm atrun
+utility runs commands queued by
+.Xr at 1 .
+It is invoked periodically by
+.Xr launchd 8
+as specified in the 
+.Pa com.apple.atrun.plist
+property list.
+By default the property list contains the
+.Em Disabled 
+key set to true, so
+.Nm atrun 
+is never invoked.
+.Pp
+Execute the following command as root to enable
+.Nm atrun :
+.Dl "launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist"
+.Pp
+.Sh FILES
+.Bl -tag -width /var/at/lockfile -compact
+.It Pa /var/at/jobs
+Directory containing job files
+.It Pa /var/at/spool
+Directory containing output spool files
+.It Pa /var/at/lockfile
+Job-creation lock file.
+.El
+.Sh SEE ALSO
+.Xr at 1 ,
+.Xr launchd 8
+.Sh AUTHOR
+.Bl -tag
+Thomas Koenig, ig25@rz.uni-karlsruhe.de
+.El
diff --git a/system_cmds/atrun.tproj/atrun.c b/system_cmds/atrun.tproj/atrun.c
new file mode 100644
index 0000000..0981614
--- /dev/null
+++ b/system_cmds/atrun.tproj/atrun.c
@@ -0,0 +1,571 @@
+/*
+ *  atrun.c - run jobs queued by at; run with root privileges.
+ *  Copyright (C) 1993, 1994 Thomas Koenig
+ *
+ * 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. The name of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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, WETHER 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__FBSDID("$FreeBSD: src/libexec/atrun/atrun.c,v 1.27 2009/12/25 10:30:54 ed Exp $");
+#endif /* not lint */
+
+/* System Headers */
+
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/param.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <err.h>
+#include <grp.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.h>
+#include <unistd.h>
+#if 1
+#include <paths.h>
+#else
+#include <getopt.h>
+#endif
+#ifdef LOGIN_CAP
+#include <login_cap.h>
+#endif
+#ifdef PAM
+#include <security/pam_appl.h>
+#include <security/openpam.h>
+#endif
+
+/* Local headers */
+
+#define MAIN
+#include "privs.h"
+#include "pathnames.h"
+
+/* Macros */
+
+#ifndef ATJOB_DIR
+#define ATJOB_DIR _PATH_ATJOBS
+#endif
+
+#ifndef ATSPOOL_DIR
+#define ATSPOOL_DIR _PATH_ATSPOOL
+#endif
+
+#ifndef LOADAVG_MX
+#define LOADAVG_MX 1.5
+#endif
+
+/* File scope variables */
+
+static const char * const atrun = "atrun"; /* service name for syslog etc. */
+static int debug = 0;
+
+void perr(const char *fmt, ...);
+void perrx(const char *fmt, ...);
+static void usage(void);
+
+/* Local functions */
+static ssize_t
+write_string(int fd, const char* a)
+{
+    return write(fd, a, strlen(a));
+}
+
+#undef DEBUG_FORK
+#ifdef DEBUG_FORK
+static pid_t
+myfork(void)
+{
+	pid_t res;
+	res = fork();
+	if (res == 0)
+	    kill(getpid(),SIGSTOP);
+	return res;
+}
+
+#define fork myfork
+#endif
+
+static void
+run_file(const char *filename, uid_t uid, gid_t gid)
+{
+/* Run a file by spawning off a process which redirects I/O,
+ * spawns a subshell, then waits for it to complete and sends
+ * mail to the user.
+ */
+    pid_t pid;
+    int fd_out, fd_in;
+    int queue;
+    char mailbuf[MAXLOGNAME], fmt[64];
+    char *mailname = NULL;
+    FILE *stream;
+    int send_mail = 0;
+    struct stat buf, lbuf;
+    off_t size;
+    struct passwd *pentry;
+    int fflags;
+    long nuid;
+    long ngid;
+#ifdef PAM
+    pam_handle_t *pamh = NULL;
+    int pam_err;
+    struct pam_conv pamc = {
+	.conv = openpam_nullconv,
+	.appdata_ptr = NULL
+    };
+#endif
+
+    PRIV_START
+
+    if (chmod(filename, S_IRUSR) != 0)
+    {
+	perr("cannot change file permissions");
+    }
+
+    PRIV_END
+
+    pid = fork();
+    if (pid == -1)
+	perr("cannot fork");
+
+    else if (pid != 0)
+	return;
+
+#ifdef __APPLE__
+    {
+	pid_t pg = setsid();
+	if (pg == -1) syslog(LOG_ERR,"setsid() failed: %m");
+    }
+#endif
+
+    /* Let's see who we mail to.  Hopefully, we can read it from
+     * the command file; if not, send it to the owner, or, failing that,
+     * to root.
+     */
+
+    pentry = getpwuid(uid);
+    if (pentry == NULL)
+	perrx("Userid %lu not found - aborting job %s",
+		(unsigned long) uid, filename);
+
+#ifdef PAM
+    PRIV_START
+
+    pam_err = pam_start(atrun, pentry->pw_name, &pamc, &pamh);
+    if (pam_err != PAM_SUCCESS)
+	perrx("cannot start PAM: %s", pam_strerror(pamh, pam_err));
+
+    pam_err = pam_acct_mgmt(pamh, PAM_SILENT);
+    /* Expired password shouldn't prevent the job from running. */
+    if (pam_err != PAM_SUCCESS && pam_err != PAM_NEW_AUTHTOK_REQD)
+	perrx("Account %s (userid %lu) unavailable for job %s: %s",
+	    pentry->pw_name, (unsigned long)uid,
+	    filename, pam_strerror(pamh, pam_err));
+
+    pam_end(pamh, pam_err);
+
+    PRIV_END
+#endif /* PAM */
+
+    PRIV_START
+
+    stream=fopen(filename, "r");
+
+    PRIV_END
+
+    if (stream == NULL)
+	perr("cannot open input file");
+
+    if ((fd_in = dup(fileno(stream))) <0)
+	perr("error duplicating input file descriptor");
+
+    if (fstat(fd_in, &buf) == -1)
+	perr("error in fstat of input file descriptor");
+
+    if (lstat(filename, &lbuf) == -1)
+	perr("error in fstat of input file");
+
+    if (S_ISLNK(lbuf.st_mode))
+	perrx("Symbolic link encountered in job %s - aborting", filename);
+
+    if ((lbuf.st_dev != buf.st_dev) || (lbuf.st_ino != buf.st_ino) ||
+        (lbuf.st_uid != buf.st_uid) || (lbuf.st_gid != buf.st_gid) ||
+        (lbuf.st_size!=buf.st_size))
+	perrx("Somebody changed files from under us for job %s - aborting",
+		filename);
+
+    if (buf.st_nlink > 1)
+	perrx("Somebody is trying to run a linked script for job %s", filename);
+
+    if ((fflags = fcntl(fd_in, F_GETFD)) <0)
+	perr("error in fcntl");
+
+    fcntl(fd_in, F_SETFD, fflags & ~FD_CLOEXEC);
+
+    snprintf(fmt, sizeof(fmt),
+	"#!/bin/sh\n# atrun uid=%%ld gid=%%ld\n# mail %%%ds %%d",
+                          MAXLOGNAME - 1);
+
+    if (fscanf(stream, fmt, &nuid, &ngid, mailbuf, &send_mail) != 4)
+	perrx("File %s is in wrong format - aborting", filename);
+
+    if (mailbuf[0] == '-')
+	perrx("Illegal mail name %s in %s", mailbuf, filename);
+
+    mailname = mailbuf;
+
+    if (nuid != uid)
+	perrx("Job %s - userid %ld does not match file uid %lu",
+		filename, nuid, (unsigned long)uid);
+
+    if (ngid != gid)
+	perrx("Job %s - groupid %ld does not match file gid %lu",
+		filename, ngid, (unsigned long)gid);
+
+    fclose(stream);
+
+    if (chdir(ATSPOOL_DIR) < 0)
+	perr("cannot chdir to %s", ATSPOOL_DIR);
+
+    /* Create a file to hold the output of the job we are about to run.
+     * Write the mail header.
+     */
+    if((fd_out=open(filename,
+		O_WRONLY | O_CREAT | O_EXCL, S_IWUSR | S_IRUSR)) < 0)
+	perr("cannot create output file");
+
+    write_string(fd_out, "Subject: Output from your job ");
+    write_string(fd_out, filename);
+    write_string(fd_out, "\n\n");
+    fstat(fd_out, &buf);
+    size = buf.st_size;
+
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+
+    pid = fork();
+    if (pid < 0)
+	perr("error in fork");
+
+    else if (pid == 0)
+    {
+	char *nul = NULL;
+	char **nenvp = &nul;
+
+	/* Set up things for the child; we want standard input from the input file,
+	 * and standard output and error sent to our output file.
+	 */
+
+	if (lseek(fd_in, (off_t) 0, SEEK_SET) < 0)
+	    perr("error in lseek");
+
+	if (dup(fd_in) != STDIN_FILENO)
+	    perr("error in I/O redirection");
+
+	if (dup(fd_out) != STDOUT_FILENO)
+	    perr("error in I/O redirection");
+
+	if (dup(fd_out) != STDERR_FILENO)
+	    perr("error in I/O redirection");
+
+	close(fd_in);
+	close(fd_out);
+	if (chdir(ATJOB_DIR) < 0)
+	    perr("cannot chdir to %s", ATJOB_DIR);
+
+	queue = *filename;
+
+	PRIV_START
+
+        nice(tolower(queue) - 'a');
+
+#ifdef LOGIN_CAP
+	/*
+	 * For simplicity and safety, set all aspects of the user context
+	 * except for a selected subset:  Don't set priority, which was
+	 * set based on the queue file name according to the tradition.
+	 * Don't bother to set environment, including path vars, either
+	 * because it will be discarded anyway.  Although the job file
+	 * should set umask, preset it here just in case.
+	 */
+	if (setusercontext(NULL, pentry, uid, LOGIN_SETALL &
+		~(LOGIN_SETPRIORITY | LOGIN_SETPATH | LOGIN_SETENV)) != 0)
+	    exit(EXIT_FAILURE);	/* setusercontext() logged the error */
+#else /* LOGIN_CAP */
+	if (setgid(gid) < 0 || setegid(pentry->pw_gid) < 0)
+	    perr("cannot change group");
+
+	if (initgroups(pentry->pw_name,pentry->pw_gid))
+	    perr("cannot init group access list");
+
+	if (setlogin(pentry->pw_name))
+	    perr("cannot set login name");
+
+	if (setuid(uid) < 0 || seteuid(uid) < 0)
+	    perr("cannot set user id");
+#endif /* LOGIN_CAP */
+
+	if (chdir(pentry->pw_dir))
+		chdir("/");
+
+	if(execle("/bin/sh","sh",(char *) NULL, nenvp) != 0)
+	    perr("exec failed for /bin/sh");
+
+	PRIV_END
+    }
+    /* We're the parent.  Let's wait.
+     */
+    close(fd_in);
+    close(fd_out);
+    waitpid(pid, (int *) NULL, 0);
+
+    /* Send mail.  Unlink the output file first, so it is deleted after
+     * the run.
+     */
+    stat(filename, &buf);
+    if (open(filename, O_RDONLY) != STDIN_FILENO)
+        perr("open of jobfile failed");
+
+    unlink(filename);
+    if ((buf.st_size != size) || send_mail)
+    {
+	PRIV_START
+
+#ifdef LOGIN_CAP
+	/*
+	 * This time set full context to run the mailer.
+	 */
+	if (setusercontext(NULL, pentry, uid, LOGIN_SETALL) != 0)
+	    exit(EXIT_FAILURE);	/* setusercontext() logged the error */
+#else /* LOGIN_CAP */
+	if (setgid(gid) < 0 || setegid(pentry->pw_gid) < 0)
+	    perr("cannot change group");
+
+	if (initgroups(pentry->pw_name,pentry->pw_gid))
+	    perr("cannot init group access list");
+
+	if (setlogin(pentry->pw_name))
+	    perr("cannot set login name");
+
+	if (setuid(uid) < 0 || seteuid(uid) < 0)
+	    perr("cannot set user id");
+#endif /* LOGIN_CAP */
+
+	if (chdir(pentry->pw_dir))
+		chdir("/");
+
+#if 1
+	execl(_PATH_SENDMAIL, "sendmail", "-F", "Atrun Service",
+			"-odi", "-oem",
+			mailname, (char *) NULL);
+#else
+        execl(MAIL_CMD, MAIL_CMD, mailname, (char *) NULL);
+#endif
+	    perr("exec failed for mail command");
+
+	PRIV_END
+    }
+    exit(EXIT_SUCCESS);
+}
+
+/* Global functions */
+
+/* Needed in gloadavg.c */
+void
+perr(const char *fmt, ...)
+{
+    const char * const fmtadd = ": %m";
+    char nfmt[strlen(fmt) + strlen(fmtadd) + 1];
+    va_list ap;
+
+    va_start(ap, fmt);
+    if (debug)
+    {
+	vwarn(fmt, ap);
+    }
+    else
+    {
+	snprintf(nfmt, sizeof(nfmt), "%s%s", fmt, fmtadd);
+	vsyslog(LOG_ERR, nfmt, ap);
+    }
+    va_end(ap);
+
+    exit(EXIT_FAILURE);
+}
+
+void
+perrx(const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    if (debug)
+	vwarnx(fmt, ap);
+    else
+	vsyslog(LOG_ERR, fmt, ap);
+    va_end(ap);
+
+    exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+/* Browse through  ATJOB_DIR, checking all the jobfiles wether they should
+ * be executed and or deleted. The queue is coded into the first byte of
+ * the job filename, the date (in minutes since Eon) as a hex number in the
+ * following eight bytes, followed by a dot and a serial number.  A file
+ * which has not been executed yet is denoted by its execute - bit set.
+ * For those files which are to be executed, run_file() is called, which forks
+ * off a child which takes care of I/O redirection, forks off another child
+ * for execution and yet another one, optionally, for sending mail.
+ * Files which already have run are removed during the next invocation.
+ */
+    DIR *spool;
+    struct dirent *dirent;
+    struct stat buf;
+    unsigned long ctm;
+    unsigned long jobno;
+    char queue;
+    time_t now, run_time;
+    char batch_name[] = "Z2345678901234";
+    uid_t batch_uid;
+    gid_t batch_gid;
+    int c;
+    int run_batch;
+    double load_avg = LOADAVG_MX, la;
+
+/* We don't need root privileges all the time; running under uid and gid daemon
+ * is fine.
+ */
+
+    RELINQUISH_PRIVS_ROOT(DAEMON_UID, DAEMON_GID)
+
+    openlog(atrun, LOG_PID, LOG_CRON);
+
+    opterr = 0;
+    while((c=getopt(argc, argv, "dl:"))!= -1)
+    {
+	switch (c)
+	{
+	case 'l':
+	    if (sscanf(optarg, "%lf", &load_avg) != 1)
+		perr("garbled option -l");
+	    if (load_avg <= 0.)
+		load_avg = LOADAVG_MX;
+	    break;
+
+	case 'd':
+	    debug ++;
+	    break;
+
+	case '?':
+	default:
+	    usage();
+	}
+    }
+
+    if (chdir(ATJOB_DIR) != 0)
+	perr("cannot change to %s", ATJOB_DIR);
+
+    /* Main loop. Open spool directory for reading and look over all the
+     * files in there. If the filename indicates that the job should be run
+     * and the x bit is set, fork off a child which sets its user and group
+     * id to that of the files and exec a /bin/sh which executes the shell
+     * script. Unlink older files if they should no longer be run.  For
+     * deletion, their r bit has to be turned on.
+     *
+     * Also, pick the oldest batch job to run, at most one per invocation of
+     * atrun.
+     */
+    if ((spool = opendir(".")) == NULL)
+	perr("cannot read %s", ATJOB_DIR);
+
+    now = time(NULL);
+    run_batch = 0;
+    batch_uid = (uid_t) -1;
+    batch_gid = (gid_t) -1;
+
+    while ((dirent = readdir(spool)) != NULL) {
+	if (stat(dirent->d_name,&buf) != 0)
+	    perr("cannot stat in %s", ATJOB_DIR);
+
+	/* We don't want directories
+	 */
+	if (!S_ISREG(buf.st_mode))
+	    continue;
+
+	if (sscanf(dirent->d_name,"%c%5lx%8lx",&queue,&jobno,&ctm) != 3)
+	    continue;
+
+	run_time = (time_t) ctm*60;
+
+	if ((S_IXUSR & buf.st_mode) && (run_time <=now)) {
+	    if ((isupper(queue) || queue == 'b') && (strcmp(batch_name,dirent->d_name) > 0)) {
+		run_batch = 1;
+		strlcpy(batch_name, dirent->d_name, sizeof(batch_name));
+		batch_uid = buf.st_uid;
+		batch_gid = buf.st_gid;
+	    }
+
+	/* The file is executable and old enough
+	 */
+	    if (islower(queue))
+		run_file(dirent->d_name, buf.st_uid, buf.st_gid);
+	}
+	/*  Delete older files
+	 */
+	if ((run_time < now) && !(S_IXUSR & buf.st_mode) && (S_IRUSR & buf.st_mode))
+	    unlink(dirent->d_name);
+    }
+    /* run the single batch file, if any
+    */
+    if (run_batch && (getloadavg(&la, 1) == 1) && la < load_avg)
+	run_file(batch_name, batch_uid, batch_gid);
+
+    closelog();
+#if __APPLE__
+    // allow enough time for child processes to call setsid(2)
+    sleep(1);
+#endif
+    exit(EXIT_SUCCESS);
+}
+
+static void
+usage(void)
+{
+    if (debug)
+	fprintf(stderr, "usage: atrun [-l load_avg] [-d]\n");
+    else
+	syslog(LOG_ERR, "usage: atrun [-l load_avg] [-d]");
+
+    exit(EXIT_FAILURE);
+}
diff --git a/system_cmds/atrun.tproj/com.apple.atrun.plist b/system_cmds/atrun.tproj/com.apple.atrun.plist
new file mode 100644
index 0000000..bdb53c0
--- /dev/null
+++ b/system_cmds/atrun.tproj/com.apple.atrun.plist
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>com.apple.atrun</string>
+    <key>ProgramArguments</key>
+    <array>
+	    <string>/usr/libexec/atrun</string>
+    </array>
+    <key>StartInterval</key>
+    <integer>30</integer>
+    <key>Disabled</key>
+    <true/>
+</dict>
+</plist>
diff --git a/system_cmds/atrun.tproj/gloadavg.c b/system_cmds/atrun.tproj/gloadavg.c
new file mode 100644
index 0000000..267a8c8
--- /dev/null
+++ b/system_cmds/atrun.tproj/gloadavg.c
@@ -0,0 +1,72 @@
+/*
+ *  gloadavg.c - get load average for Linux
+ *  Copyright (C) 1993  Thomas Koenig
+ *
+ * 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. The name of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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, WETHER 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 const char rcsid[] =
+  "$FreeBSD: src/libexec/atrun/gloadavg.c,v 1.5 1999/08/28 00:09:12 peter Exp $";
+#endif /* not lint */
+
+#ifndef __FreeBSD__
+#define _POSIX_SOURCE 1
+
+/* System Headers */
+
+#include <stdio.h>
+#else
+#include <stdlib.h>
+#endif
+
+/* Local headers */
+
+#include "gloadavg.h"
+
+/* Global functions */
+
+void perr(const char *a);
+
+double
+gloadavg(void)
+/* return the current load average as a floating point number, or <0 for
+ * error
+ */
+{
+    double result;
+#ifndef __FreeBSD__
+    FILE *fp;
+
+    if((fp=fopen(PROC_DIR "loadavg","r")) == NULL)
+	result = -1.0;
+    else
+    {
+	if(fscanf(fp,"%lf",&result) != 1)
+	    result = -1.0;
+	fclose(fp);
+    }
+#else
+    if (getloadavg(&result, 1) != 1)
+	    perr("error in getloadavg");
+#endif
+    return result;
+}
diff --git a/system_cmds/atrun.tproj/gloadavg.h b/system_cmds/atrun.tproj/gloadavg.h
new file mode 100644
index 0000000..b81a4fc
--- /dev/null
+++ b/system_cmds/atrun.tproj/gloadavg.h
@@ -0,0 +1,29 @@
+/*
+ *  gloadavg.h -  header for atrun(8)
+ *  Copyright (C) 1993  Thomas Koenig
+ *
+ * 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. The name of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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, WETHER 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.
+ */
+
+double gloadavg(void);
+#if 0
+static char atrun_h_rcsid[] = "$FreeBSD: src/libexec/atrun/gloadavg.h,v 1.4 1999/08/28 00:09:12 peter Exp $";
+#endif