981dfb0965
- use warnx() to tell the user whether a process is running in normal,
idle or realtime priority. with the old code it would have been possible
for another process to send data to stdout between
printf("%s: ", p);
and
printf("* priority\n");
and thus break the formatting.
- 'rtprio 10 -0' triggeres non-intuitive behavior. It would first set the
priority of itself to 10 *and* would then try to execute '-0'. Of course,
setting the priority of [id|rt]prio itself doesn't make a lot of sense,
but it is intuitive compared to the previous behavior.
- 'rtprio -t --1' will actually pass over the '-1' to rtprio(). Now
invoking rtprio like this will catch the wrong usage before passing
over the invalid argument to rtprio().
- Garrett Cooper suggested to add further diagnostics where the failure
occures, if execvp fails.
PR: bin/154042
Submitted by: arundel
MFC after: 1 month
151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*
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* Copyright (c) 1994 David Greenman
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* Copyright (c) 1994 Henrik Vestergaard Draboel (hvd@terry.ping.dk)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Henrik Vestergaard Draboel.
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* This product includes software developed by David Greenman.
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* 4. Neither the names of the authors nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/rtprio.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int parseint(const char *, const char *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct rtprio rtp;
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const char *progname;
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pid_t proc = 0;
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progname = getprogname();
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if (strcmp(progname, "rtprio") == 0)
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rtp.type = RTP_PRIO_REALTIME;
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else if (strcmp(progname, "idprio") == 0)
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rtp.type = RTP_PRIO_IDLE;
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else
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errx(1, "invalid progname");
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switch (argc) {
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case 2:
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proc = parseint(argv[1], "pid");
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proc = abs(proc);
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/* FALLTHROUGH */
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case 1:
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if (rtprio(RTP_LOOKUP, proc, &rtp) != 0)
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err(1, "RTP_LOOKUP");
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switch (rtp.type) {
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case RTP_PRIO_REALTIME:
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case RTP_PRIO_FIFO:
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warnx("realtime priority %d", rtp.prio);
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break;
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case RTP_PRIO_NORMAL:
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warnx("normal priority");
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break;
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case RTP_PRIO_IDLE:
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warnx("idle priority %d", rtp.prio);
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break;
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default:
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errx(1, "invalid priority type %d", rtp.type);
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break;
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}
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exit(0);
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default:
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if (argv[1][0] == '-' || isdigit(argv[1][0])) {
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if (argv[1][0] == '-') {
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if (strcmp(argv[1], "-t") == 0) {
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rtp.type = RTP_PRIO_NORMAL;
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rtp.prio = 0;
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} else {
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usage();
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break;
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}
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} else
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rtp.prio = parseint(argv[1], "priority");
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} else {
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usage();
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break;
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}
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if (argv[2][0] == '-') {
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proc = parseint(argv[2], "pid");
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proc = abs(proc);
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if (rtprio(RTP_SET, proc, &rtp) != 0)
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err(1, "RTP_SET");
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} else {
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execvp(argv[2], &argv[2]);
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err(1, "execvp: %s", argv[2]);
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}
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exit(0);
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}
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/* NOTREACHED */
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}
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static int
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parseint(const char *str, const char *errname)
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{
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char *endp;
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long res;
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errno = 0;
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res = strtol(str, &endp, 10);
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if (errno != 0 || endp == str || *endp != '\0')
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errx(1, "%s must be a number", errname);
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if (res >= INT_MAX)
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errx(1, "Integer overflow parsing %s", errname);
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return (res);
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}
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static void
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usage(void)
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{
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(void) fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
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"usage: [id|rt]prio",
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" [id|rt]prio [-]pid",
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" [id|rt]prio priority command [args]",
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" [id|rt]prio priority -pid",
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" [id|rt]prio -t command [args]",
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" [id|rt]prio -t -pid");
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exit(1);
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}
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