util.c revision 178826
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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#if 0 35#ifndef lint 36#if 0 37static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 38#endif 39static const char rcsid[] = 40 "$FreeBSD: head/crypto/heimdal/appl/rcp/util.c 178826 2008-05-07 13:39:42Z dfr $"; 41#endif /* not lint */ 42#endif 43 44#include "rcp_locl.h" 45 46RCSID("$Id: util.c 17878 2006-08-08 21:43:58Z lha $"); 47 48char * 49colon(cp) 50 char *cp; 51{ 52 if (*cp == ':') /* Leading colon is part of file name. */ 53 return (0); 54 55 for (; *cp; ++cp) { 56 if (*cp == ':') 57 return (cp); 58 if (*cp == '/') 59 return (0); 60 } 61 return (0); 62} 63 64void 65verifydir(cp) 66 char *cp; 67{ 68 struct stat stb; 69 70 if (!stat(cp, &stb)) { 71 if (S_ISDIR(stb.st_mode)) 72 return; 73 errno = ENOTDIR; 74 } 75 run_err("%s: %s", cp, strerror(errno)); 76 exit(1); 77} 78 79int 80okname(cp0) 81 char *cp0; 82{ 83 int c; 84 unsigned char *cp; 85 86 cp = (unsigned char *)cp0; 87 do { 88 c = *cp; 89 if (c & 0200) 90 goto bad; 91 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-') 92 goto bad; 93 } while (*++cp); 94 return (1); 95 96bad: warnx("%s: invalid user name", cp0); 97 return (0); 98} 99 100int 101susystem(s, userid) 102 int userid; 103 char *s; 104{ 105 void (*istat)(int), (*qstat)(int); 106 int status; 107 pid_t pid; 108 109 pid = fork(); 110 switch (pid) { 111 case -1: 112 return (127); 113 114 case 0: 115 if (setuid(userid) < 0) 116 _exit(127); 117 execl(_PATH_BSHELL, "sh", "-c", s, 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} 128 129#ifndef roundup 130#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 131#endif 132 133BUF * 134allocbuf(bp, fd, blksize) 135 BUF *bp; 136 int fd, blksize; 137{ 138 struct stat stb; 139 size_t size; 140 char *p; 141 142 if (fstat(fd, &stb) < 0) { 143 run_err("fstat: %s", strerror(errno)); 144 return (0); 145 } 146 size = roundup(stb.st_blksize, blksize); 147 if (size == 0) 148 size = blksize; 149 if (bp->cnt >= size) 150 return (bp); 151 if ((p = realloc(bp->buf, size)) == NULL) { 152 if (bp->buf) 153 free(bp->buf); 154 bp->buf = NULL; 155 bp->cnt = 0; 156 run_err("%s", strerror(errno)); 157 return (0); 158 } 159 memset(p, 0, size); 160 bp->buf = p; 161 bp->cnt = size; 162 return (bp); 163} 164 165void 166lostconn(signo) 167 int signo; 168{ 169 if (!iamremote) 170 warnx("lost connection"); 171 exit(1); 172} 173