diff options
Diffstat (limited to 'shell_cmds/nice')
-rw-r--r-- | shell_cmds/nice/nice.1 | 120 | ||||
-rw-r--r-- | shell_cmds/nice/nice.c | 122 |
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); +} |