1/*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31#if 0 32static const char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 33#endif 34#endif /* not lint */ 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: src/bin/rcp/util.c,v 1.17 2004/04/06 20:06:50 markm Exp $"); 37 38#include <sys/param.h> 39#include <sys/stat.h> 40#include <sys/wait.h> 41 42#include <ctype.h> 43#include <err.h> 44#include <errno.h> 45#include <paths.h> 46#include <signal.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <string.h> 50#include <unistd.h> 51 52#include "extern.h" 53 54char * 55colon(char *cp) 56{ 57 if (*cp == ':') /* Leading colon is part of file name. */ 58 return (0); 59 60 for (; *cp; ++cp) { 61 if (*cp == ':') 62 return (cp); 63 if (*cp == '/') 64 return (0); 65 } 66 return (0); 67} 68 69void 70verifydir(char *cp) 71{ 72 struct stat stb; 73 74 if (!stat(cp, &stb)) { 75 if (S_ISDIR(stb.st_mode)) 76 return; 77 errno = ENOTDIR; 78 } 79 run_err("%s: %s", cp, strerror(errno)); 80 exit(1); 81} 82 83int 84okname(char *cp0) 85{ 86 int c; 87 char *cp; 88 89 cp = cp0; 90 do { 91 c = *cp; 92 if (c & 0200) 93 goto bad; 94 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-' && c != '.') 95 goto bad; 96 } while (*++cp); 97 return (1); 98 99bad: warnx("%s: invalid user name", cp0); 100 return (0); 101} 102 103int 104susystem(char *s, int userid) 105{ 106 sig_t istat, qstat; 107 int status; 108 pid_t pid; 109 110 pid = vfork(); 111 switch (pid) { 112 case -1: 113 return (127); 114 115 case 0: 116 (void)setuid(userid); 117 execl(_PATH_BSHELL, "sh", "-c", s, (char *)NULL); 118 _exit(127); 119 } 120 istat = signal(SIGINT, SIG_IGN); 121 qstat = signal(SIGQUIT, SIG_IGN); 122 if (waitpid(pid, &status, 0) < 0) 123 status = -1; 124 (void)signal(SIGINT, istat); 125 (void)signal(SIGQUIT, qstat); 126 return (status); 127} 128 129BUF * 130allocbuf(BUF *bp, int fd, int blksize) 131{ 132 struct stat stb; 133 size_t size; 134 135 if (fstat(fd, &stb) < 0) { 136 run_err("fstat: %s", strerror(errno)); 137 return (0); 138 } 139 size = roundup(stb.st_blksize, blksize); 140 if (size == 0) 141 size = blksize; 142 if (bp->cnt >= size) 143 return (bp); 144 if ((bp->buf = realloc(bp->buf, size)) == NULL) { 145 bp->cnt = 0; 146 run_err("%s", strerror(errno)); 147 return (0); 148 } 149 bp->cnt = size; 150 return (bp); 151} 152 153void 154lostconn(int signo __unused) 155{ 156 if (!iamremote) 157 warnx("lost connection"); 158 exit(1); 159} 160