diff options
Diffstat (limited to 'lib/libc/net/getprotoent.c')
| -rw-r--r-- | lib/libc/net/getprotoent.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/lib/libc/net/getprotoent.c b/lib/libc/net/getprotoent.c new file mode 100644 index 0000000..705ba42 --- /dev/null +++ b/lib/libc/net/getprotoent.c @@ -0,0 +1,203 @@ +/* + * 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. 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/socket.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "namespace.h" +#include "reentrant.h" +#include "un-namespace.h" +#include "netdb_private.h" + +static struct protodata protodata; +static thread_key_t protodata_key; +static once_t protodata_init_once = ONCE_INITIALIZER; +static int protodata_thr_keycreated = 0; + +static void +protoent_data_clear(struct protoent_data *ped) +{ + if (ped->fp) { + fclose(ped->fp); + ped->fp = NULL; + } +} + +static void +protodata_free(void *ptr) +{ + struct protodata *pd = ptr; + + if (pd == NULL) + return; + protoent_data_clear(&pd->data); + free(pd); +} + +static void +protodata_keycreate(void) +{ + protodata_thr_keycreated = + (thr_keycreate(&protodata_key, protodata_free) == 0); +} + +struct protodata * +__protodata_init(void) +{ + struct protodata *pd; + + if (thr_main() != 0) + return (&protodata); + if (thr_once(&protodata_init_once, protodata_keycreate) != 0 || + !protodata_thr_keycreated) + return (NULL); + if ((pd = thr_getspecific(protodata_key)) != NULL) + return (pd); + if ((pd = calloc(1, sizeof(*pd))) == NULL) + return (NULL); + if (thr_setspecific(protodata_key, pd) == 0) + return (pd); + free(pd); + return (NULL); +} + +void +setprotoent_r(int f, struct protoent_data *ped) +{ + if (ped->fp == NULL) + ped->fp = fopen(_PATH_PROTOCOLS, "r"); + else + rewind(ped->fp); + ped->stayopen |= f; +} + +void +endprotoent_r(struct protoent_data *ped) +{ + if (ped->fp) { + fclose(ped->fp); + ped->fp = NULL; + } + ped->stayopen = 0; +} + +int +getprotoent_r(struct protoent *pe, struct protoent_data *ped) +{ + char *p; + char *cp, **q, *endp; + long l; + + if (ped->fp == NULL && (ped->fp = fopen(_PATH_PROTOCOLS, "r")) == NULL) + return (-1); +again: + if ((p = fgets(ped->line, sizeof ped->line, ped->fp)) == NULL) + return (-1); + if (*p == '#') + goto again; + cp = strpbrk(p, "#\n"); + if (cp != NULL) + *cp = '\0'; + pe->p_name = p; + cp = strpbrk(p, " \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 > USHRT_MAX) + goto again; + pe->p_proto = l; + q = pe->p_aliases = ped->aliases; + if (p != NULL) { + cp = p; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < &ped->aliases[_MAXALIASES - 1]) + *q++ = cp; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + } + } + *q = NULL; + return (0); +} + +void +setprotoent(int f) +{ + struct protodata *pd; + + if ((pd = __protodata_init()) == NULL) + return; + setprotoent_r(f, &pd->data); +} + +void +endprotoent(void) +{ + struct protodata *pd; + + if ((pd = __protodata_init()) == NULL) + return; + endprotoent_r(&pd->data); +} + +struct protoent * +getprotoent(void) +{ + struct protodata *pd; + + if ((pd = __protodata_init()) == NULL) + return (NULL); + if (getprotoent_r(&pd->proto, &pd->data) != 0) + return (NULL); + return (&pd->proto); +} |
