b89261ba01
Due to differences in (mainly) measuring and accumulating CPU times, the two top programs end up serving different purposes: the NetBSD top is a system administration tool, while the MINIX3 top (now mtop) is a performance debugging tool. Therefore, we keep both. The newly imported BSD top has a few MINIX3-specific changes. CPU statistics separate system time from kernel time, rather than kernel time from time spent on handling interrupts. Memory statistics show numbers that are currently relevant for MINIX3. Swap statistics are disabled entirely. All of these changes effectively bring it closer to how mtop already worked as well. Change-Id: I9611917cb03e164ddf012c5def6da0e7fede826d
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* Copyright (c) 1984 through 2008, William LeFebvre
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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 are met:
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*
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* * 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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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of William LeFebvre nor the names of other
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* "getopt" routine customized for top.
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*/
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/*
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* Many modern-day Unix implementations already have this function
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* in libc. The standard "getopt" is perfectly sufficient for top's
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* needs. If such a function exists in libc then you certainly don't
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* need to compile this one in. To prevent this function from being
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* compiled, define "HAVE_GETOPT". This is usually done in the "CFLAGS"
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* line of the corresponding machine module.
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*/
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/*
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* This empty declaration exists solely to placate overexhuberant C
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* compilers that like to warn you about content-free files.
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*/
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static void __empty();
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#ifndef HAVE_GETOPT
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/*LINTLIBRARY*/
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#include "os.h"
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#ifndef NULL
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#define NULL 0
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#endif
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#ifndef EOF
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#define EOF (-1)
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#endif
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#define ERR(s, c) if(opterr){\
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extern int write();\
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char errbuf[2];\
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errbuf[0] = c; errbuf[1] = '\n';\
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(void) write(2, argv[0], strlen(argv[0]));\
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(void) write(2, s, strlen(s));\
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(void) write(2, errbuf, 2);}
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int opterr = 1;
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int optind = 1;
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int optopt;
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char *optarg;
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int
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getopt(int argc, char **argv, char *opts)
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{
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static int sp = 1;
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register int c;
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register char *cp;
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if(sp == 1)
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if(optind >= argc ||
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argv[optind][0] != '-' || argv[optind][1] == '\0')
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return(EOF);
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else if(strcmp(argv[optind], "--") == 0) {
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optind++;
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return(EOF);
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}
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optopt = c = argv[optind][sp];
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if(c == ':' || (cp=strchr(opts, c)) == NULL) {
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ERR(": unknown option, -", c);
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if(argv[optind][++sp] == '\0') {
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optind++;
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sp = 1;
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}
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return('?');
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}
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if(*++cp == ':') {
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if(argv[optind][sp+1] != '\0')
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optarg = &argv[optind++][sp+1];
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else if(++optind >= argc) {
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ERR(": argument missing for -", c);
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sp = 1;
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return('?');
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} else
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optarg = argv[optind++];
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sp = 1;
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} else {
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if(argv[optind][++sp] == '\0') {
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sp = 1;
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optind++;
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}
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optarg = NULL;
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}
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return(c);
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}
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#endif /* HAVE_GETOPT */
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