11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1992, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * Redistribution and use in source and binary forms, with or without 61556Srgrimes * modification, are permitted provided that the following conditions 71556Srgrimes * are met: 81556Srgrimes * 1. Redistributions of source code must retain the above copyright 91556Srgrimes * notice, this list of conditions and the following disclaimer. 101556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111556Srgrimes * notice, this list of conditions and the following disclaimer in the 121556Srgrimes * documentation and/or other materials provided with the distribution. 131556Srgrimes * 4. Neither the name of the University nor the names of its contributors 141556Srgrimes * may be used to endorse or promote products derived from this software 151556Srgrimes * without specific prior written permission. 161556Srgrimes * 171556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271556Srgrimes * SUCH DAMAGE. 281556Srgrimes */ 291556Srgrimes 301556Srgrimes#ifndef lint 3136149Scharnier#if 0 32105269Smarkmstatic const char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94"; 3336149Scharnier#endif 341556Srgrimes#endif /* not lint */ 3599110Sobrien#include <sys/cdefs.h> 3699110Sobrien__FBSDID("$FreeBSD$"); 371556Srgrimes 381556Srgrimes#include <sys/param.h> 391556Srgrimes#include <sys/stat.h> 401556Srgrimes#include <sys/wait.h> 411556Srgrimes 421556Srgrimes#include <ctype.h> 431556Srgrimes#include <err.h> 441556Srgrimes#include <errno.h> 451556Srgrimes#include <paths.h> 461556Srgrimes#include <signal.h> 471556Srgrimes#include <stdio.h> 481556Srgrimes#include <stdlib.h> 491556Srgrimes#include <string.h> 501556Srgrimes#include <unistd.h> 511556Srgrimes 521556Srgrimes#include "extern.h" 531556Srgrimes 541556Srgrimeschar * 5590110Simpcolon(char *cp) 561556Srgrimes{ 571556Srgrimes if (*cp == ':') /* Leading colon is part of file name. */ 581556Srgrimes return (0); 591556Srgrimes 601556Srgrimes for (; *cp; ++cp) { 611556Srgrimes if (*cp == ':') 621556Srgrimes return (cp); 631556Srgrimes if (*cp == '/') 641556Srgrimes return (0); 651556Srgrimes } 661556Srgrimes return (0); 671556Srgrimes} 681556Srgrimes 691556Srgrimesvoid 7090110Simpverifydir(char *cp) 711556Srgrimes{ 721556Srgrimes struct stat stb; 731556Srgrimes 741556Srgrimes if (!stat(cp, &stb)) { 751556Srgrimes if (S_ISDIR(stb.st_mode)) 761556Srgrimes return; 771556Srgrimes errno = ENOTDIR; 781556Srgrimes } 791556Srgrimes run_err("%s: %s", cp, strerror(errno)); 801556Srgrimes exit(1); 811556Srgrimes} 821556Srgrimes 831556Srgrimesint 8490110Simpokname(char *cp0) 851556Srgrimes{ 861556Srgrimes int c; 871556Srgrimes char *cp; 881556Srgrimes 891556Srgrimes cp = cp0; 901556Srgrimes do { 911556Srgrimes c = *cp; 921556Srgrimes if (c & 0200) 931556Srgrimes goto bad; 9480818Sobrien if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-' && c != '.') 951556Srgrimes goto bad; 961556Srgrimes } while (*++cp); 971556Srgrimes return (1); 981556Srgrimes 991556Srgrimesbad: warnx("%s: invalid user name", cp0); 1001556Srgrimes return (0); 1011556Srgrimes} 1021556Srgrimes 1031556Srgrimesint 10490110Simpsusystem(char *s, int userid) 1051556Srgrimes{ 1061556Srgrimes sig_t istat, qstat; 1077165Sjoerg int status; 1081556Srgrimes pid_t pid; 1091556Srgrimes 1101556Srgrimes pid = vfork(); 1111556Srgrimes switch (pid) { 1121556Srgrimes case -1: 1131556Srgrimes return (127); 1148855Srgrimes 1151556Srgrimes case 0: 1161556Srgrimes (void)setuid(userid); 11779452Sbrian execl(_PATH_BSHELL, "sh", "-c", s, (char *)NULL); 1181556Srgrimes _exit(127); 1191556Srgrimes } 1201556Srgrimes istat = signal(SIGINT, SIG_IGN); 1211556Srgrimes qstat = signal(SIGQUIT, SIG_IGN); 1221556Srgrimes if (waitpid(pid, &status, 0) < 0) 1231556Srgrimes status = -1; 1241556Srgrimes (void)signal(SIGINT, istat); 1251556Srgrimes (void)signal(SIGQUIT, qstat); 1261556Srgrimes return (status); 1271556Srgrimes} 1281556Srgrimes 1291556SrgrimesBUF * 13090110Simpallocbuf(BUF *bp, int fd, int blksize) 1311556Srgrimes{ 1321556Srgrimes struct stat stb; 1331556Srgrimes size_t size; 1341556Srgrimes 1351556Srgrimes if (fstat(fd, &stb) < 0) { 1361556Srgrimes run_err("fstat: %s", strerror(errno)); 1371556Srgrimes return (0); 1381556Srgrimes } 1391556Srgrimes size = roundup(stb.st_blksize, blksize); 1401556Srgrimes if (size == 0) 1411556Srgrimes size = blksize; 1421556Srgrimes if (bp->cnt >= size) 1431556Srgrimes return (bp); 1441556Srgrimes if ((bp->buf = realloc(bp->buf, size)) == NULL) { 1451556Srgrimes bp->cnt = 0; 1461556Srgrimes run_err("%s", strerror(errno)); 1471556Srgrimes return (0); 1481556Srgrimes } 1491556Srgrimes bp->cnt = size; 1501556Srgrimes return (bp); 1511556Srgrimes} 1521556Srgrimes 1531556Srgrimesvoid 154104130Sjmallettlostconn(int signo __unused) 1551556Srgrimes{ 1561556Srgrimes if (!iamremote) 1571556Srgrimes warnx("lost connection"); 1581556Srgrimes exit(1); 1591556Srgrimes} 160