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 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 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 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