1 /* $NetBSD: misc.c,v 1.16 2023/08/10 20:36:28 mrg Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Cimarron D. Taylor of the University of California, Berkeley.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "from: @(#)misc.c 8.2 (Berkeley) 4/1/94";
39 #else
40 __RCSID("$NetBSD: misc.c,v 1.16 2023/08/10 20:36:28 mrg Exp $");
41 #endif
42 #endif /* not lint */
43
44 #include <sys/types.h>
45 #include <sys/stat.h>
46
47 #include <err.h>
48 #include <errno.h>
49 #include <fts.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <paths.h>
55 #include <fcntl.h>
56
57 #include "find.h"
58
59 /*
60 * brace_subst --
61 * Replace occurrences of {} in orig with path, and place it in a malloced
62 * area of memory set in store.
63 */
64 void
brace_subst(char * orig,char ** store,char * path,size_t * len)65 brace_subst(char *orig, char **store, char *path, size_t *len)
66 {
67 size_t nlen, plen, rest;
68 char ch, *p, *ostore;
69
70 plen = strlen(path);
71 for (p = *store; (ch = *orig) != '\0'; ++orig)
72 if (ch == '{' && orig[1] == '}') {
73 /* Length of string after the {}. */
74 rest = strlen(&orig[2]);
75
76 nlen = *len;
77 while ((p - *store) + plen + rest + 1 > nlen)
78 nlen *= 2;
79
80 if (nlen > *len) {
81 ptrdiff_t off = p - *store;
82
83 ostore = *store;
84 if ((*store = realloc(ostore, nlen)) == NULL)
85 err(1, "realloc");
86 *len = nlen;
87 p = *store + off; /* Relocate. */
88 }
89 memmove(p, path, plen);
90 p += plen;
91 ++orig;
92 } else
93 *p++ = ch;
94 *p = '\0';
95 }
96
97 /*
98 * queryuser --
99 * print a message to standard error and then read input from standard
100 * input. If the input is 'y' then 1 is returned.
101 */
102 int
queryuser(char ** argv)103 queryuser(char **argv)
104 {
105 int ch, first, nl;
106
107 (void)fprintf(stderr, "\"%s", *argv);
108 while (*++argv)
109 (void)fprintf(stderr, " %s", *argv);
110 (void)fprintf(stderr, "\"? ");
111 (void)fflush(stderr);
112
113 first = ch = getchar();
114 for (nl = 0;;) {
115 if (ch == '\n') {
116 nl = 1;
117 break;
118 }
119 if (ch == EOF)
120 break;
121 ch = getchar();
122 }
123
124 if (!nl) {
125 (void)fprintf(stderr, "\n");
126 (void)fflush(stderr);
127 }
128 return (first == 'y');
129 }
130
131 /*
132 * show_path --
133 * called on SIGINFO
134 */
135 /* ARGSUSED */
136 void
show_path(int sig)137 show_path(int sig)
138 {
139 extern FTSENT *g_entry;
140 static int ttyfd = -2;
141 char buf[2048];
142 int oerrno, n;
143
144 if (g_entry == NULL) {
145 /*
146 * not initialized yet.
147 * assumption: pointer assignment is atomic.
148 */
149 return;
150 }
151
152 oerrno = errno;
153 if (ttyfd == -2)
154 ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC);
155
156 if (ttyfd == -1)
157 goto out;
158
159 n = snprintf_ss(buf, sizeof(buf), "%s: path %s\n", getprogname(),
160 g_entry->fts_path);
161
162 if (n <= 0)
163 goto out;
164
165 write(ttyfd, buf, (size_t)n);
166 out:
167 errno = oerrno;
168 }
169