1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/time.h>
34 #include <sys/resource.h>
35
36 #include <err.h>
37 #include <limits.h>
38 #include <stdio.h>
39 #include <stdint.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <vis.h>
44
45 #include "ps.h"
46
47 static char *cmdpart(char *);
48 static char *shquote(char **);
49
50 static char *
shquote(char ** argv)51 shquote(char **argv)
52 {
53 long arg_max;
54 static size_t buf_size;
55 size_t len;
56 char **p, *dst, *src;
57 static char *buf = NULL;
58
59 if (buf == NULL) {
60 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
61 errx(1, "sysconf _SC_ARG_MAX failed");
62 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4))
63 errx(1, "sysconf _SC_ARG_MAX preposterously large");
64 buf_size = 4 * arg_max + 1;
65 if ((buf = malloc(buf_size)) == NULL)
66 errx(1, "malloc failed");
67 }
68
69 if (*argv == NULL) {
70 buf[0] = '\0';
71 return (buf);
72 }
73 dst = buf;
74 for (p = argv; (src = *p++) != NULL; ) {
75 if (*src == '\0')
76 continue;
77 len = (buf_size - 1 - (dst - buf)) / 4;
78 strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
79 VIS_NL | VIS_CSTYLE);
80 while (*dst != '\0')
81 dst++;
82 if ((buf_size - 1 - (dst - buf)) / 4 > 0)
83 *dst++ = ' ';
84 }
85 /* Chop off trailing space */
86 if (dst != buf && dst[-1] == ' ')
87 dst--;
88 *dst = '\0';
89 return (buf);
90 }
91
92 static char *
cmdpart(char * arg0)93 cmdpart(char *arg0)
94 {
95 char *cp;
96
97 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
98 }
99
100 const char *
fmt_argv(char ** argv,char * cmd,char * thread,size_t maxlen)101 fmt_argv(char **argv, char *cmd, char *thread, size_t maxlen)
102 {
103 size_t len;
104 char *ap, *cp;
105
106 if (argv == NULL || argv[0] == NULL) {
107 if (cmd == NULL)
108 return ("");
109 ap = NULL;
110 len = maxlen + 3;
111 } else {
112 ap = shquote(argv);
113 len = strlen(ap) + maxlen + 4;
114 }
115 cp = malloc(len);
116 if (cp == NULL)
117 errx(1, "malloc failed");
118 if (ap == NULL) {
119 if (thread != NULL) {
120 asprintf(&ap, "%s/%s", cmd, thread);
121 sprintf(cp, "[%.*s]", (int)maxlen, ap);
122 free(ap);
123 } else
124 sprintf(cp, "[%.*s]", (int)maxlen, cmd);
125 } else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
126 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd);
127 else
128 strcpy(cp, ap);
129 return (cp);
130 }
131