fmt.c revision 89575 
1/*-
2 * Copyright (c) 1992, 1993, 1994
3 *	The Regents of the University of California.  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#if 0
36static char sccsid[] = "@(#)fmt.c	8.4 (Berkeley) 4/15/94";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: head/bin/ps/fmt.c 89575 2002-01-20 01:30:40Z mikeh $";
40#endif /* not lint */
41
42#include <sys/types.h>
43#include <sys/time.h>
44#include <sys/resource.h>
45#include <err.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <unistd.h>
50#include <vis.h>
51#include "ps.h"
52
53static char *cmdpart __P((char *));
54static char *shquote __P((char **));
55
56/*
57 * XXX
58 * This is a stub until marc does the real one.
59 */
60static char *
61shquote(argv)
62	char **argv;
63{
64	static long arg_max = -1;
65	long len;
66	char **p, *dst, *src;
67	static char *buf = NULL;
68
69	if (buf == NULL) {
70		if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
71			errx(1, "sysconf _SC_ARG_MAX failed");
72		if ((buf = malloc((4 * arg_max)  +  1)) == NULL)
73			errx(1, "malloc failed");
74	}
75
76	if (*argv == 0) {
77		buf[0] = 0;
78		return (buf);
79	}
80	dst = buf;
81	for (p = argv; (src = *p++) != 0; ) {
82		if (*src == 0)
83			continue;
84		len = (4 * arg_max - (dst - buf)) / 4;
85		strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
86		    VIS_NL | VIS_CSTYLE);
87		while (*dst)
88			dst++;
89		if ((4 * arg_max - (dst - buf)) / 4 > 0)
90			*dst++ = ' ';
91	}
92	/* Chop off trailing space */
93	if (dst != buf && dst[-1] == ' ')
94		dst--;
95	*dst = '\0';
96	return (buf);
97}
98
99static char *
100cmdpart(arg0)
101	char *arg0;
102{
103	char *cp;
104
105	return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
106}
107
108char *
109fmt_argv(argv, cmd, maxlen)
110	char **argv;
111	char *cmd;
112	int maxlen;
113{
114	int len;
115	char *ap, *cp;
116
117	if (argv == 0 || argv[0] == 0) {
118		if (cmd == NULL)
119			return ("");
120		ap = NULL;
121		len = maxlen + 3;
122	} else {
123		ap = shquote(argv);
124		len = strlen(ap) + maxlen + 4;
125	}
126	if ((cp = malloc(len)) == NULL)
127		return (NULL);
128	if (ap == NULL)
129		sprintf(cp, " (%.*s)", maxlen, cmd);
130	else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
131		sprintf(cp, "%s (%.*s)", ap, maxlen, cmd);
132	else
133		(void) strcpy(cp, ap);
134	return (cp);
135}
136