xref: /freebsd/bin/ps/fmt.c (revision a1a4f1a0d87b594d3f17a97dc0127eec1417e6f6)
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
36 static char sccsid[] = "@(#)fmt.c	8.4 (Berkeley) 4/15/94";
37 #endif
38 static const char rcsid[] =
39   "$FreeBSD$";
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 
53 static char *cmdpart __P((char *));
54 static char *shquote __P((char **));
55 
56 /*
57  * XXX
58  * This is a stub until marc does the real one.
59  */
60 static char *
61 shquote(argv)
62 	char **argv;
63 {
64 	long arg_max;
65 	char **p, *dst, *src;
66 	static char *buf = NULL;
67 
68 	if (buf == NULL) {
69 		if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
70 			errx(1, "sysconf _SC_ARG_MAX failed");
71 		if ((buf = malloc((4 * arg_max)  +  1)) == NULL)
72 			errx(1, "malloc failed");
73 	}
74 
75 	if (*argv == 0) {
76 		buf[0] = 0;
77 		return (buf);
78 	}
79 	dst = buf;
80 	for (p = argv; (src = *p++) != 0; ) {
81 		if (*src == 0)
82 			continue;
83 		strvis(dst, src, VIS_NL | VIS_CSTYLE);
84 		while (*dst)
85 			dst++;
86 		*dst++ = ' ';
87 	}
88 	/* Chop off trailing space */
89 	if (dst != buf)
90 		dst--;
91 	*dst = '\0';
92 	return (buf);
93 }
94 
95 static char *
96 cmdpart(arg0)
97 	char *arg0;
98 {
99 	char *cp;
100 
101 	return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
102 }
103 
104 char *
105 fmt_argv(argv, cmd, maxlen)
106 	char **argv;
107 	char *cmd;
108 	int maxlen;
109 {
110 	int len;
111 	char *ap, *cp;
112 
113 	if (argv == 0 || argv[0] == 0) {
114 		if (cmd == NULL)
115 			return ("");
116 		ap = NULL;
117 		len = maxlen + 3;
118 	} else {
119 		ap = shquote(argv);
120 		len = strlen(ap) + maxlen + 4;
121 	}
122 	if ((cp = malloc(len)) == NULL)
123 		return (NULL);
124 	if (ap == NULL)
125 		sprintf(cp, " (%.*s)", maxlen, cmd);
126 	else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
127 		sprintf(cp, "%s (%.*s)", ap, maxlen, cmd);
128 	else
129 		(void) strcpy(cp, ap);
130 	return (cp);
131 }
132