1/* $NetBSD: util.c,v 1.11 2006/12/15 22:45:34 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1992, 1993 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/cdefs.h> 33#ifndef lint 34#if 0 35static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 36#else 37__RCSID("$NetBSD: util.c,v 1.11 2006/12/15 22:45:34 christos Exp $"); 38#endif 39#endif /* not lint */ 40 41#include <sys/param.h> 42#include <sys/stat.h> 43#include <sys/wait.h> 44 45#include <ctype.h> 46#include <err.h> 47#include <errno.h> 48#include <paths.h> 49#include <signal.h> 50#include <stdio.h> 51#include <stdlib.h> 52#include <string.h> 53#include <unistd.h> 54 55#include "extern.h" 56 57char * 58colon(char *cp) 59{ 60 if (*cp == ':') /* Leading colon is part of file name. */ 61 return (0); 62 63 for (; *cp; ++cp) { 64 if (*cp == ':') 65 return (cp); 66 if (*cp == '/') 67 return (0); 68 } 69 return (0); 70} 71 72char * 73unbracket(char *cp) 74{ 75 char *ep; 76 77 if (*cp == '[') { 78 ep = cp + (strlen(cp) - 1); 79 if (*ep == ']') { 80 *ep = '\0'; 81 ++cp; 82 } 83 } 84 return (cp); 85} 86 87void 88verifydir(char *cp) 89{ 90 struct stat stb; 91 92 if (!stat(cp, &stb)) { 93 if (S_ISDIR(stb.st_mode)) 94 return; 95 errno = ENOTDIR; 96 } 97 run_err("%s: %s", cp, strerror(errno)); 98 exit(1); 99 /* NOTREACHED */ 100} 101 102int 103okname(char *cp0) 104{ 105 int c; 106 char *cp; 107 108 cp = cp0; 109 do { 110 c = *cp; 111 if (c & 0200) 112 goto bad; 113 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-') 114 goto bad; 115 } while (*++cp); 116 return (1); 117 118bad: warnx("%s: invalid user name", cp0); 119 return (0); 120} 121 122int 123susystem(char *s) 124{ 125 sig_t istat, qstat; 126 int status; 127 pid_t pid; 128 129 pid = vfork(); 130 switch (pid) { 131 case -1: 132 return (127); 133 134 case 0: 135 (void)execl(_PATH_BSHELL, "sh", "-c", s, NULL); 136 _exit(127); 137 /* NOTREACHED */ 138 } 139 istat = signal(SIGINT, SIG_IGN); 140 qstat = signal(SIGQUIT, SIG_IGN); 141 if (waitpid(pid, &status, 0) < 0) 142 status = -1; 143 (void)signal(SIGINT, istat); 144 (void)signal(SIGQUIT, qstat); 145 return (status); 146} 147 148BUF * 149allocbuf(BUF *bp, int fd, int blksize) 150{ 151 struct stat stb; 152 size_t size; 153 char *nbuf; 154 155 if (fstat(fd, &stb) < 0) { 156 run_err("fstat: %s", strerror(errno)); 157 return (0); 158 } 159 size = roundup(stb.st_blksize, blksize); 160 if (size == 0) 161 size = blksize; 162 if (bp->cnt >= size) 163 return (bp); 164 if ((nbuf = realloc(bp->buf, size)) == NULL) { 165 free(bp->buf); 166 bp->buf = NULL; 167 bp->cnt = 0; 168 run_err("%s", strerror(errno)); 169 return (0); 170 } 171 bp->buf = nbuf; 172 bp->cnt = size; 173 return (bp); 174} 175 176void 177/*ARGSUSED*/ 178lostconn(int signo __unused) 179{ 180 if (!iamremote) 181 warnx("lost connection"); 182 exit(1); 183 /* NOTREACHED */ 184} 185