170 lines
4.2 KiB
C
170 lines
4.2 KiB
C
|
/* $OpenBSD: getprotoent.c,v 1.13 2015/09/14 07:38:38 guenther Exp $ */
|
||
|
/*
|
||
|
* Copyright (c) 1983, 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.
|
||
|
*/
|
||
|
|
||
|
#include <sys/types.h>
|
||
|
#include <sys/socket.h>
|
||
|
|
||
|
#include <errno.h>
|
||
|
#include <limits.h>
|
||
|
#include <netdb.h>
|
||
|
#include <stdio.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <string.h>
|
||
|
|
||
|
void
|
||
|
setprotoent_r(int f, struct protoent_data *pd)
|
||
|
{
|
||
|
if (pd->fp == NULL)
|
||
|
pd->fp = fopen(_PATH_PROTOCOLS, "re" );
|
||
|
else
|
||
|
rewind(pd->fp);
|
||
|
pd->stayopen |= f;
|
||
|
}
|
||
|
DEF_WEAK(setprotoent_r);
|
||
|
|
||
|
void
|
||
|
endprotoent_r(struct protoent_data *pd)
|
||
|
{
|
||
|
if (pd->fp) {
|
||
|
fclose(pd->fp);
|
||
|
pd->fp = NULL;
|
||
|
}
|
||
|
free(pd->aliases);
|
||
|
pd->aliases = NULL;
|
||
|
pd->maxaliases = 0;
|
||
|
free(pd->line);
|
||
|
pd->line = NULL;
|
||
|
pd->stayopen = 0;
|
||
|
}
|
||
|
DEF_WEAK(endprotoent_r);
|
||
|
|
||
|
int
|
||
|
getprotoent_r(struct protoent *pe, struct protoent_data *pd)
|
||
|
{
|
||
|
char *p, *cp, **q, *endp;
|
||
|
size_t len;
|
||
|
long l;
|
||
|
int serrno;
|
||
|
|
||
|
if (pd->fp == NULL && (pd->fp = fopen(_PATH_PROTOCOLS, "re" )) == NULL)
|
||
|
return (-1);
|
||
|
again:
|
||
|
if ((p = fgetln(pd->fp, &len)) == NULL)
|
||
|
return (-1);
|
||
|
if (len == 0 || *p == '#' || *p == '\n')
|
||
|
goto again;
|
||
|
if (p[len-1] == '\n')
|
||
|
len--;
|
||
|
if ((cp = memchr(p, '#', len)) != NULL)
|
||
|
len = cp - p;
|
||
|
cp = realloc(pd->line, len + 1);
|
||
|
if (cp == NULL)
|
||
|
return (-1);
|
||
|
pd->line = pe->p_name = memcpy(cp, p, len);
|
||
|
cp[len] = '\0';
|
||
|
cp = strpbrk(cp, " \t");
|
||
|
if (cp == NULL)
|
||
|
goto again;
|
||
|
*cp++ = '\0';
|
||
|
while (*cp == ' ' || *cp == '\t')
|
||
|
cp++;
|
||
|
p = strpbrk(cp, " \t");
|
||
|
if (p != NULL)
|
||
|
*p++ = '\0';
|
||
|
l = strtol(cp, &endp, 10);
|
||
|
if (endp == cp || *endp != '\0' || l < 0 || l >= INT_MAX)
|
||
|
goto again;
|
||
|
pe->p_proto = l;
|
||
|
if (pd->aliases == NULL) {
|
||
|
pd->maxaliases = 5;
|
||
|
pd->aliases = calloc(pd->maxaliases, sizeof(char *));
|
||
|
if (pd->aliases == NULL) {
|
||
|
serrno = errno;
|
||
|
endprotoent_r(pd);
|
||
|
errno = serrno;
|
||
|
return (-1);
|
||
|
}
|
||
|
}
|
||
|
q = pe->p_aliases = pd->aliases;
|
||
|
if (p != NULL) {
|
||
|
cp = p;
|
||
|
while (cp && *cp) {
|
||
|
if (*cp == ' ' || *cp == '\t') {
|
||
|
cp++;
|
||
|
continue;
|
||
|
}
|
||
|
if (q == &pe->p_aliases[pd->maxaliases - 1]) {
|
||
|
p = reallocarray(pe->p_aliases,
|
||
|
pd->maxaliases, 2 * sizeof(char *));
|
||
|
if (p == NULL) {
|
||
|
serrno = errno;
|
||
|
endprotoent_r(pd);
|
||
|
errno = serrno;
|
||
|
return (-1);
|
||
|
}
|
||
|
pd->maxaliases *= 2;
|
||
|
q = (char **)p + (q - pe->p_aliases);
|
||
|
pe->p_aliases = pd->aliases = (char **)p;
|
||
|
}
|
||
|
*q++ = cp;
|
||
|
cp = strpbrk(cp, " \t");
|
||
|
if (cp != NULL)
|
||
|
*cp++ = '\0';
|
||
|
}
|
||
|
}
|
||
|
*q = NULL;
|
||
|
return (0);
|
||
|
}
|
||
|
DEF_WEAK(getprotoent_r);
|
||
|
|
||
|
struct protoent_data _protoent_data; /* shared with getproto{,name}.c */
|
||
|
|
||
|
void
|
||
|
setprotoent(int f)
|
||
|
{
|
||
|
setprotoent_r(f, &_protoent_data);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
endprotoent(void)
|
||
|
{
|
||
|
endprotoent_r(&_protoent_data);
|
||
|
}
|
||
|
|
||
|
struct protoent *
|
||
|
getprotoent(void)
|
||
|
{
|
||
|
static struct protoent proto;
|
||
|
|
||
|
if (getprotoent_r(&proto, &_protoent_data) != 0)
|
||
|
return (NULL);
|
||
|
return (&proto);
|
||
|
}
|