1162852Sdes/*- 2162852Sdes * Copyright (c) 1992, 1993 3162852Sdes * The Regents of the University of California. All rights reserved. 4162852Sdes * 5162852Sdes * Redistribution and use in source and binary forms, with or without 6162852Sdes * modification, are permitted provided that the following conditions 7162852Sdes * are met: 8162852Sdes * 1. Redistributions of source code must retain the above copyright 9162852Sdes * notice, this list of conditions and the following disclaimer. 10162852Sdes * 2. Redistributions in binary form must reproduce the above copyright 11162852Sdes * notice, this list of conditions and the following disclaimer in the 12162852Sdes * documentation and/or other materials provided with the distribution. 13162852Sdes * 4. Neither the name of the University nor the names of its contributors 14162852Sdes * may be used to endorse or promote products derived from this software 15162852Sdes * without specific prior written permission. 16162852Sdes * 17162852Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18162852Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19162852Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20162852Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21162852Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22162852Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23162852Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24162852Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25162852Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26162852Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27162852Sdes * SUCH DAMAGE. 28162852Sdes */ 29162852Sdes 30162852Sdes#ifndef lint 31162852Sdes#if 0 32162852Sdesstatic const char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 33162852Sdes#endif 34162852Sdes#endif /* not lint */ 35162852Sdes#include <sys/cdefs.h> 36162852Sdes__FBSDID("$FreeBSD$"); 37162852Sdes 38162852Sdes#include <sys/param.h> 39162852Sdes#include <sys/stat.h> 40162852Sdes#include <sys/wait.h> 41162852Sdes 42162852Sdes#include <ctype.h> 43162852Sdes#include <err.h> 44162852Sdes#include <errno.h> 45162852Sdes#include <paths.h> 46162852Sdes#include <signal.h> 47162852Sdes#include <stdio.h> 48162852Sdes#include <stdlib.h> 49162852Sdes#include <string.h> 50162852Sdes#include <unistd.h> 51162852Sdes 52162852Sdes#include "extern.h" 53162852Sdes 54162852Sdeschar * 55162852Sdescolon(char *cp) 56162852Sdes{ 57162852Sdes if (*cp == ':') /* Leading colon is part of file name. */ 58162852Sdes return (0); 59162852Sdes 60162852Sdes for (; *cp; ++cp) { 61162852Sdes if (*cp == ':') 62162852Sdes return (cp); 63162852Sdes if (*cp == '/') 64162852Sdes return (0); 65162852Sdes } 66162852Sdes return (0); 67162852Sdes} 68162852Sdes 69162852Sdesvoid 70162852Sdesverifydir(char *cp) 71162852Sdes{ 72162852Sdes struct stat stb; 73162852Sdes 74162852Sdes if (!stat(cp, &stb)) { 75162852Sdes if (S_ISDIR(stb.st_mode)) 76162852Sdes return; 77162852Sdes errno = ENOTDIR; 78162852Sdes } 79162852Sdes run_err("%s: %s", cp, strerror(errno)); 80162852Sdes exit(1); 81162852Sdes} 82162852Sdes 83162852Sdesint 84162852Sdesokname(char *cp0) 85162852Sdes{ 86162852Sdes int c; 87162852Sdes 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