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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #if 0
31 #ifndef lint
32 static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94";
33 #endif
34 #endif
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #include <sys/types.h>
40 #include <sys/time.h>
41 #include <sys/resource.h>
42
43 #include <err.h>
44 #include <limits.h>
45 #include <stdio.h>
46 #include <stdint.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50 #include <vis.h>
51
52 #include "ps.h"
53
54 static char *cmdpart(char *);
55 static char *shquote(char **);
56
57 static char *
shquote(char ** argv)58 shquote(char **argv)
59 {
60 long arg_max;
61 static size_t buf_size;
62 size_t len;
63 char **p, *dst, *src;
64 static char *buf = NULL;
65
66 if (buf == NULL) {
67 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
68 errx(1, "sysconf _SC_ARG_MAX failed");
69 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4))
70 errx(1, "sysconf _SC_ARG_MAX preposterously large");
71 buf_size = 4 * arg_max + 1;
72 if ((buf = malloc(buf_size)) == NULL)
73 errx(1, "malloc failed");
74 }
75
76 if (*argv == NULL) {
77 buf[0] = '\0';
78 return (buf);
79 }
80 dst = buf;
81 for (p = argv; (src = *p++) != NULL; ) {
82 if (*src == '\0')
83 continue;
84 len = (buf_size - 1 - (dst - buf)) / 4;
85 strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
86 VIS_NL | VIS_CSTYLE);
87 while (*dst != '\0')
88 dst++;
89 if ((buf_size - 1 - (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
99 static char *
cmdpart(char * arg0)100 cmdpart(char *arg0)
101 {
102 char *cp;
103
104 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
105 }
106
107 const char *
fmt_argv(char ** argv,char * cmd,char * thread,size_t maxlen)108 fmt_argv(char **argv, char *cmd, char *thread, size_t maxlen)
109 {
110 size_t len;
111 char *ap, *cp;
112
113 if (argv == NULL || argv[0] == NULL) {
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 cp = malloc(len);
123 if (cp == NULL)
124 errx(1, "malloc failed");
125 if (ap == NULL) {
126 if (thread != NULL) {
127 asprintf(&ap, "%s/%s", cmd, thread);
128 sprintf(cp, "[%.*s]", (int)maxlen, ap);
129 free(ap);
130 } else
131 sprintf(cp, "[%.*s]", (int)maxlen, cmd);
132 } else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
133 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd);
134 else
135 strcpy(cp, ap);
136 return (cp);
137 }
138