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/* $OpenBSD: util.c,v 1.13 2003/07/28 06:05:35 tedu Exp $ */
/* $NetBSD: util.c,v 1.2 1995/03/21 08:19:08 cgd Exp $ */
/*-
* 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. 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
#if 0
static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94";
#else
static const char rcsid[] = "$OpenBSD: util.c,v 1.13 2003/07/28 06:05:35 tedu Exp $";
#endif
#endif /* not lint */
#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(char *cp)
{
for (; *cp; ++cp) {
if (*cp == ':')
return (cp);
if (*cp == '/')
return (0);
}
return (0);
}
void
verifydir(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(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(char *s, int userid)
{
sig_t istat, qstat;
int status;
pid_t pid;
pid = vfork();
switch (pid) {
case -1:
return (127);
case 0:
(void)seteuid(userid);
(void)setuid(userid);
execl(_PATH_BSHELL, "sh", "-c", s, (char *)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(BUF *bp, int fd, int blksize)
{
struct stat stb;
size_t size;
char *p;
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 ((p = realloc(bp->buf, size)) == NULL) {
if (bp->buf)
free(bp->buf);
bp->buf = NULL;
bp->cnt = 0;
run_err("%s", strerror(errno));
return (0);
}
memset(p, 0, size);
bp->buf = p;
bp->cnt = size;
return (bp);
}
void
lostconn(int signo)
{
extern char *__progname;
char buf[1024];
if (!iamremote) {
strlcpy(buf, __progname, sizeof buf);
strlcat(buf, ": lost connection\n", sizeof buf);
write(STDERR_FILENO, buf, strlen(buf));
}
_exit(1);
}
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