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authorCameron Katri <me@cameronkatri.com>2021-05-09 14:20:58 -0400
committerCameron Katri <me@cameronkatri.com>2021-05-09 14:20:58 -0400
commit5fd83771641d15c418f747bd343ba6738d3875f7 (patch)
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Diffstat (limited to 'shell_cmds/nice')
-rw-r--r--shell_cmds/nice/nice.1120
-rw-r--r--shell_cmds/nice/nice.c122
2 files changed, 242 insertions, 0 deletions
diff --git a/shell_cmds/nice/nice.1 b/shell_cmds/nice/nice.1
new file mode 100644
index 0000000..4dba5c9
--- /dev/null
+++ b/shell_cmds/nice/nice.1
@@ -0,0 +1,120 @@
+.\" $NetBSD: nice.1,v 1.8 1997/10/19 06:28:02 lukem Exp $
+.\"
+.\" Copyright (c) 1980, 1990, 1993
+.\" 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.
+.\"
+.\" @(#)nice.1 8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt NICE 1
+.Os
+.Sh NAME
+.Nm nice
+.Nd execute a utility with an altered scheduling priority
+.Sh SYNOPSIS
+.Nm
+.Op Fl n Ar increment
+.Ar utility
+.Op Ar argument ...
+.Sh DESCRIPTION
+.Nm
+runs
+.Ar utility
+at an altered scheduling priority.
+If an
+.Ar increment
+is given, it is used; otherwise
+an increment of 10 is assumed.
+The super-user can run utilities with priorities higher than normal by using
+a negative
+.Ar increment .
+The priority can be adjusted over a
+range of -20 (the highest) to 20 (the lowest).
+.Pp
+Available options:
+.Bl -tag -width indent
+.It Fl n Ar increment
+A positive or negative decimal integer used to modify the system scheduling
+priority of
+.Ar utility.
+.El
+.Sh DIAGNOSTICS
+The
+.Nm
+utility shall exit with one of the following values:
+.Bl -tag -width indent
+.It 1-125
+An error occurred in the
+.Nm
+utility.
+.It 126
+The
+.Ar utility
+was found but could not be invoked.
+.It 127
+The
+.Ar utility
+could not be found.
+.El
+.Pp
+Otherwise, the exit status of
+.Nm
+shall be that of
+.Ar utility .
+.Sh COMPATIBILITY
+The historic
+.Fl Ns Ar increment
+option has been deprecated but is still supported in this implementation.
+.Sh SEE ALSO
+.Xr csh 1 ,
+.Xr getpriority 2 ,
+.Xr setpriority 2 ,
+.Xr renice 8
+.Sh STANDARDS
+The
+.Nm
+utility conforms to
+.St -p1003.2-92 .
+.Sh HISTORY
+A
+.Nm
+utility appeared in
+.At v6 .
+.Sh BUGS
+.Nm
+is built into
+.Xr csh 1
+with a slightly different syntax than described here. The form
+.Ql nice +10
+nices to positive nice, and
+.Ql nice \-10
+can be used
+by the super-user to give a process more of the processor.
diff --git a/shell_cmds/nice/nice.c b/shell_cmds/nice/nice.c
new file mode 100644
index 0000000..62a197e
--- /dev/null
+++ b/shell_cmds/nice/nice.c
@@ -0,0 +1,122 @@
+/* $NetBSD: nice.c,v 1.10 1997/10/19 06:28:04 lukem Exp $ */
+
+/*
+ * Copyright (c) 1989 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT(
+ "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90";
+#endif
+__RCSID("$NetBSD: nice.c,v 1.10 1997/10/19 06:28:04 lukem Exp $");
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <locale.h>
+#include <ctype.h>
+#include <errno.h>
+#include <err.h>
+#include <unistd.h>
+
+#define DEFNICE 10
+
+int main __P((int, char **));
+static void usage __P((void));
+
+int
+main(argc, argv)
+ int argc;
+ char **argv;
+{
+ int niceness = DEFNICE;
+ int c;
+
+ setlocale(LC_ALL, "");
+
+ /* handle obsolete -number syntax */
+ if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) {
+ niceness = atoi (argv[1] + 1);
+ argc--; argv++;
+ }
+
+ while ((c = getopt (argc, argv, "n:")) != -1) {
+ switch (c) {
+ case 'n':
+ niceness = atoi (optarg);
+ break;
+
+ case '?':
+ default:
+ usage();
+ break;
+ }
+ }
+ argc -= optind; argv += optind;
+
+ if (argc == 0)
+ usage();
+
+ errno = 0;
+ niceness += getpriority(PRIO_PROCESS, 0);
+ if (errno) {
+ err (1, "getpriority");
+ /* NOTREACHED */
+ }
+ if (setpriority(PRIO_PROCESS, 0, niceness)) {
+ warn ("setpriority");
+ }
+
+ execvp(argv[0], &argv[0]);
+ err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
+ /* NOTREACHED */
+}
+
+static void
+usage()
+{
+ (void)fprintf(stderr,
+ "usage: nice [ -n increment ] utility [ argument ...]\n");
+
+ exit(1);
+}