1 /* $NetBSD: misc.c,v 1.15 2022/01/22 14:08:19 christos 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 1.15 2022/01/22 14:08:19 christos 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 ostore = *store; 82 if ((*store = realloc(ostore, nlen)) == NULL) 83 err(1, "realloc"); 84 *len = nlen; 85 p += *store - ostore; /* Relocate. */ 86 } 87 memmove(p, path, plen); 88 p += plen; 89 ++orig; 90 } else 91 *p++ = ch; 92 *p = '\0'; 93 } 94 95 /* 96 * queryuser -- 97 * print a message to standard error and then read input from standard 98 * input. If the input is 'y' then 1 is returned. 99 */ 100 int 101 queryuser(char **argv) 102 { 103 int ch, first, nl; 104 105 (void)fprintf(stderr, "\"%s", *argv); 106 while (*++argv) 107 (void)fprintf(stderr, " %s", *argv); 108 (void)fprintf(stderr, "\"? "); 109 (void)fflush(stderr); 110 111 first = ch = getchar(); 112 for (nl = 0;;) { 113 if (ch == '\n') { 114 nl = 1; 115 break; 116 } 117 if (ch == EOF) 118 break; 119 ch = getchar(); 120 } 121 122 if (!nl) { 123 (void)fprintf(stderr, "\n"); 124 (void)fflush(stderr); 125 } 126 return (first == 'y'); 127 } 128 129 /* 130 * show_path -- 131 * called on SIGINFO 132 */ 133 /* ARGSUSED */ 134 void 135 show_path(int sig) 136 { 137 extern FTSENT *g_entry; 138 static int ttyfd = -2; 139 char buf[2048]; 140 int oerrno, n; 141 142 if (g_entry == NULL) { 143 /* 144 * not initialized yet. 145 * assumption: pointer assignment is atomic. 146 */ 147 return; 148 } 149 150 oerrno = errno; 151 if (ttyfd == -2) 152 ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC); 153 154 if (ttyfd == -1) 155 goto out; 156 157 n = snprintf_ss(buf, sizeof(buf), "%s: path %s\n", getprogname(), 158 g_entry->fts_path); 159 160 if (n <= 0) 161 goto out; 162 163 write(ttyfd, buf, (size_t)n); 164 out: 165 errno = oerrno; 166 } 167