[unix-history] / usr / src / usr.bin / renice / renice.c

/*
 * Copyright (c) 1983 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
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)renice.c	5.3 (Berkeley) 6/1/90";
#endif /* not lint */

#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <pwd.h>

/*
 * Change the priority (nice) of processes
 * or groups of processes which are already
 * running.
 */
main(argc, argv)
	char **argv;
{
	int which = PRIO_PROCESS;
	int who = 0, prio, errs = 0;

	argc--, argv++;
	if (argc < 2) {
		fprintf(stderr, "usage: renice priority [ [ -p ] pids ] ");
		fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n");
		exit(1);
	}
	prio = atoi(*argv);
	argc--, argv++;
	if (prio > PRIO_MAX)
		prio = PRIO_MAX;
	if (prio < PRIO_MIN)
		prio = PRIO_MIN;
	for (; argc > 0; argc--, argv++) {
		if (strcmp(*argv, "-g") == 0) {
			which = PRIO_PGRP;
			continue;
		}
		if (strcmp(*argv, "-u") == 0) {
			which = PRIO_USER;
			continue;
		}
		if (strcmp(*argv, "-p") == 0) {
			which = PRIO_PROCESS;
			continue;
		}
		if (which == PRIO_USER) {
			register struct passwd *pwd = getpwnam(*argv);
			
			if (pwd == NULL) {
				fprintf(stderr, "renice: %s: unknown user\n",
					*argv);
				continue;
			}
			who = pwd->pw_uid;
		} else {
			who = atoi(*argv);
			if (who < 0) {
				fprintf(stderr, "renice: %s: bad value\n",
					*argv);
				continue;
			}
		}
		errs += donice(which, who, prio);
	}
	exit(errs != 0);
}

donice(which, who, prio)
	int which, who, prio;
{
	int oldprio;
	extern int errno;

	errno = 0, oldprio = getpriority(which, who);
	if (oldprio == -1 && errno) {
		fprintf(stderr, "renice: %d: ", who);
		perror("getpriority");
		return (1);
	}
	if (setpriority(which, who, prio) < 0) {
		fprintf(stderr, "renice: %d: ", who);
		perror("setpriority");
		return (1);
	}
	printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);
	return (0);
}
Commit	Line	Data
fe8fff3d WJ	1	/*
	2	* Copyright (c) 1983 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)renice.c 5.3 (Berkeley) 6/1/90";
	42	#endif /* not lint */
	43
	44	#include <sys/time.h>
	45	#include <sys/resource.h>
	46	#include <stdio.h>
	47	#include <pwd.h>
	48
	49	/*
	50	* Change the priority (nice) of processes
	51	* or groups of processes which are already
	52	* running.
	53	*/
	54	main(argc, argv)
	55	char **argv;
	56	{
	57	int which = PRIO_PROCESS;
	58	int who = 0, prio, errs = 0;
	59
	60	argc--, argv++;
	61	if (argc < 2) {
	62	fprintf(stderr, "usage: renice priority [ [ -p ] pids ] ");
	63	fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n");
	64	exit(1);
65	}
66	prio = atoi(*argv);
67	argc--, argv++;
68	if (prio > PRIO_MAX)
69	prio = PRIO_MAX;
70	if (prio < PRIO_MIN)
71	prio = PRIO_MIN;
72	for (; argc > 0; argc--, argv++) {
73	if (strcmp(*argv, "-g") == 0) {
74	which = PRIO_PGRP;
75	continue;
76	}
77	if (strcmp(*argv, "-u") == 0) {
78	which = PRIO_USER;
79	continue;
80	}
81	if (strcmp(*argv, "-p") == 0) {
82	which = PRIO_PROCESS;
83	continue;
84	}
85	if (which == PRIO_USER) {
86	register struct passwd pwd = getpwnam(argv);
87
88	if (pwd == NULL) {
89	fprintf(stderr, "renice: %s: unknown user\n",
90	*argv);
91	continue;
92	}
93	who = pwd->pw_uid;
94	} else {
95	who = atoi(*argv);
96	if (who < 0) {
97	fprintf(stderr, "renice: %s: bad value\n",
98	*argv);
99	continue;
100	}
101	}
102	errs += donice(which, who, prio);
103	}
104	exit(errs != 0);
105	}
106
107	donice(which, who, prio)
108	int which, who, prio;
109	{
110	int oldprio;
111	extern int errno;
112
113	errno = 0, oldprio = getpriority(which, who);
114	if (oldprio == -1 && errno) {
115	fprintf(stderr, "renice: %d: ", who);
116	perror("getpriority");
117	return (1);
118	}
119	if (setpriority(which, who, prio) < 0) {
120	fprintf(stderr, "renice: %d: ", who);
121	perror("setpriority");
122	return (1);
123	}
124	printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);
125	return (0);
126	}