sps.c revision 68609 
1/*-
2 * Copyright (c) 1998 Andrzej Bialecki
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/release/picobsd/tinyware/sps/sps.c 68609 2000-11-11 16:12:39Z abial $
27 */
28
29/*
30 * Small replacement for ps(1) - uses only sysctl(3) to retrieve info
31 */
32
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <sys/param.h>
37#include <sys/sysctl.h>
38#include <sys/stat.h>
39#include <sys/proc.h>
40#include <sys/user.h>
41
42char p_stat[]="?iRSTZWM";
43
44int
45main(int argc, char *argv[])
46{
47	int mib[4],i=0, num, len, j, plen;
48	int sz = sizeof(struct proc) + sizeof(struct eproc);
49	struct proc *p;
50	struct eproc *ep;
51	char buf[MAXPATHLEN],vty[5],pst[5], wmesg[10];
52	char *t;
53	int ma,mi;
54
55	mib[0]=CTL_KERN;
56	mib[1]=KERN_PROC;
57	mib[2]=KERN_PROC_ALL;
58	if(sysctl(mib,3,NULL,&len,NULL,0)) {
59		perror("sysctl sizing");
60		exit(1);
61	}
62	t=(char *)malloc(len);
63	if(sysctl(mib,3,t,&len,NULL,0)) {
64		perror("sysctl info");
65		exit(1);
66	}
67	mib[2]=KERN_PROC_ARGS;
68	num = len / sz;
69	i=0;
70	printf("USERNAME   PID  PPID PRI NICE TTY STAT WCHAN   COMMAND\n");
71	while(i < num) {
72		p=(struct proc *)(t + (num - i - 1) * sz);
73		ep=(struct eproc *)(t + (num - i - 1) * sz + sizeof(struct proc));
74		mib[3]=p->p_pid;
75		plen = MAXPATHLEN;
76		if(sysctl(mib,4,buf,&plen,NULL,0)) {
77			perror("sysctl info");
78			exit(1);
79		}
80		if(plen == 0) {
81			sprintf(buf, "(%s)", p->p_comm);
82		} else {
83			for(j=0; j < plen-1; j++) {
84				if(buf[j] == '\0') buf[j] = ' ';
85			}
86		}
87		if(strcmp(ep->e_wmesg, "") == 0) {
88			sprintf(wmesg, "-");
89		} else {
90			strcpy(wmesg, ep->e_wmesg);
91		}
92		ma=major(ep->e_tdev);
93		mi=minor(ep->e_tdev);
94		switch(ma) {
95		case 255:
96			strcpy(vty,"??");
97			break;
98		case 12:
99			if(mi!=255) {
100				sprintf(vty,"v%d",mi);
101				break;
102			}
103			/* FALLTHROUGH */
104		case 0:
105			strcpy(vty,"con");
106			break;
107		case 5:
108			sprintf(vty,"p%d",mi);
109			break;
110		}
111		sprintf(pst,"%c",p_stat[p->p_stat]);
112		printf("%8s %5u %5u %3d %4d %3s %-4s %-7s %s\n",
113			ep->e_login,
114			p->p_pid,
115			ep->e_ppid,
116			p->p_priority - 22,
117			p->p_nice,
118			vty,
119			pst,
120			wmesg,
121			buf);
122		i++;
123	}
124	free((void *)t);
125	exit(0);
126}
127