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- /*-
- * Copyright (c) 1992, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94";
- #endif /* not lint */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/wait.h>
-
- #include <ctype.h>
- #include <err.h>
- #include <errno.h>
- #include <paths.h>
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
-
- #include "extern.h"
-
- char *
- colon(cp)
- char *cp;
- {
- if (*cp == ':') /* Leading colon is part of file name. */
- return (0);
-
- for (; *cp; ++cp) {
- if (*cp == ':')
- return (cp);
- if (*cp == '/')
- return (0);
- }
- return (0);
- }
-
- void
- verifydir(cp)
- char *cp;
- {
- struct stat stb;
-
- if (!stat(cp, &stb)) {
- if (S_ISDIR(stb.st_mode))
- return;
- errno = ENOTDIR;
- }
- run_err("%s: %s", cp, strerror(errno));
- exit(1);
- }
-
- int
- okname(cp0)
- char *cp0;
- {
- int c;
- char *cp;
-
- cp = cp0;
- do {
- c = *cp;
- if (c & 0200)
- goto bad;
- if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
- goto bad;
- } while (*++cp);
- return (1);
-
- bad: warnx("%s: invalid user name", cp0);
- return (0);
- }
-
- int
- susystem(s, userid)
- int userid;
- char *s;
- {
- sig_t istat, qstat;
- int status, w;
- pid_t pid;
-
- pid = vfork();
- switch (pid) {
- case -1:
- return (127);
-
- case 0:
- (void)setuid(userid);
- execl(_PATH_BSHELL, "sh", "-c", s, NULL);
- _exit(127);
- }
- istat = signal(SIGINT, SIG_IGN);
- qstat = signal(SIGQUIT, SIG_IGN);
- if (waitpid(pid, &status, 0) < 0)
- status = -1;
- (void)signal(SIGINT, istat);
- (void)signal(SIGQUIT, qstat);
- return (status);
- }
-
- BUF *
- allocbuf(bp, fd, blksize)
- BUF *bp;
- int fd, blksize;
- {
- struct stat stb;
- size_t size;
-
- if (fstat(fd, &stb) < 0) {
- run_err("fstat: %s", strerror(errno));
- return (0);
- }
- size = roundup(stb.st_blksize, blksize);
- if (size == 0)
- size = blksize;
- if (bp->cnt >= size)
- return (bp);
- if ((bp->buf = realloc(bp->buf, size)) == NULL) {
- bp->cnt = 0;
- run_err("%s", strerror(errno));
- return (0);
- }
- bp->cnt = size;
- return (bp);
- }
-
- void
- lostconn(signo)
- int signo;
- {
- if (!iamremote)
- warnx("lost connection");
- exit(1);
- }
-