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 37 static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 38 #endif 39 static const char rcsid[] = 40 "$FreeBSD$"; 41 #endif /* not lint */ 42 #endif 43 44 #include "rcp_locl.h" 45 46 RCSID("$Id: util.c,v 1.6 2001/09/04 14:35:58 assar Exp $"); 47 48 char * 49 colon(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 64 void 65 verifydir(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 79 int 80 okname(cp0) 81 char *cp0; 82 { 83 int c; 84 char *cp; 85 86 cp = 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 96 bad: warnx("%s: invalid user name", cp0); 97 return (0); 98 } 99 100 int 101 susystem(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 (void)setuid(userid); 116 execl(_PATH_BSHELL, "sh", "-c", s, NULL); 117 _exit(127); 118 } 119 istat = signal(SIGINT, SIG_IGN); 120 qstat = signal(SIGQUIT, SIG_IGN); 121 if (waitpid(pid, &status, 0) < 0) 122 status = -1; 123 (void)signal(SIGINT, istat); 124 (void)signal(SIGQUIT, qstat); 125 return (status); 126 } 127 128 #ifndef roundup 129 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 130 #endif 131 132 BUF * 133 allocbuf(bp, fd, blksize) 134 BUF *bp; 135 int fd, blksize; 136 { 137 struct stat stb; 138 size_t size; 139 char *p; 140 141 if (fstat(fd, &stb) < 0) { 142 run_err("fstat: %s", strerror(errno)); 143 return (0); 144 } 145 size = roundup(stb.st_blksize, blksize); 146 if (size == 0) 147 size = blksize; 148 if (bp->cnt >= size) 149 return (bp); 150 if ((p = realloc(bp->buf, size)) == NULL) { 151 if (bp->buf) 152 free(bp->buf); 153 bp->buf = NULL; 154 bp->cnt = 0; 155 run_err("%s", strerror(errno)); 156 return (0); 157 } 158 memset(p, 0, size); 159 bp->buf = p; 160 bp->cnt = size; 161 return (bp); 162 } 163 164 void 165 lostconn(signo) 166 int signo; 167 { 168 if (!iamremote) 169 warnx("lost connection"); 170 exit(1); 171 } 172