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-rw-r--r--libc/inet/getproto.c94
1 files changed, 74 insertions, 20 deletions
diff --git a/libc/inet/getproto.c b/libc/inet/getproto.c
index 0f145ead4..2a5fc8f8f 100644
--- a/libc/inet/getproto.c
+++ b/libc/inet/getproto.c
@@ -60,6 +60,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
@@ -76,9 +77,8 @@ static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
#define MAXALIASES 35
static FILE *protof = NULL;
-static char line[BUFSIZ+1];
static struct protoent proto;
-static char *proto_aliases[MAXALIASES];
+static char static_aliases[BUFSIZ+1 + sizeof(char *)*MAXALIASES];
static int proto_stayopen;
void setprotoent(int f)
@@ -103,20 +103,43 @@ void endprotoent(void)
UNLOCK;
}
-struct protoent * getprotoent(void)
+int getprotoent_r(struct protoent *result_buf,
+ char *buf, size_t buflen,
+ struct protoent **result)
{
char *p;
register char *cp, **q;
+ char **proto_aliases;
+ char *line;
+
+ *result = NULL;
+ if (buflen < sizeof(*proto_aliases)*MAXALIASES) {
+ errno=ERANGE;
+ return errno;
+ }
LOCK;
+ proto_aliases=(char **)buf;
+ buf+=sizeof(*proto_aliases)*MAXALIASES;
+ buflen-=sizeof(*proto_aliases)*MAXALIASES;
+
+ if (buflen < BUFSIZ+1) {
+ UNLOCK;
+ errno=ERANGE;
+ return errno;
+ }
+ line=buf;
+ buf+=BUFSIZ+1;
+ buflen-=BUFSIZ+1;
+
if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) {
UNLOCK;
- return (NULL);
+ return errno;
}
again:
if ((p = fgets(line, BUFSIZ, protof)) == NULL) {
UNLOCK;
- return (NULL);
+ return TRY_AGAIN;
}
if (*p == '#')
@@ -125,7 +148,7 @@ again:
if (cp == NULL)
goto again;
*cp = '\0';
- proto.p_name = p;
+ result_buf->p_name = p;
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
@@ -135,8 +158,8 @@ again:
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
- proto.p_proto = atoi(cp);
- q = proto.p_aliases = proto_aliases;
+ result_buf->p_proto = atoi(cp);
+ q = result_buf->p_aliases = proto_aliases;
if (p != NULL) {
cp = p;
while (cp && *cp) {
@@ -152,22 +175,33 @@ again:
}
}
*q = NULL;
+ *result=result_buf;
UNLOCK;
- return (&proto);
+ return 0;
}
+struct protoent * getprotoent(void)
+{
+ struct protoent *result;
+ getprotoent_r(&proto, static_aliases, sizeof(static_aliases), &result);
+ return result;
+}
-struct protoent * getprotobyname(const char *name)
+
+int getprotobyname_r(const char *name,
+ struct protoent *result_buf,
+ char *buf, size_t buflen,
+ struct protoent **result)
{
- register struct protoent *p;
register char **cp;
+ int ret;
LOCK;
setprotoent(proto_stayopen);
- while ((p = getprotoent()) != NULL) {
- if (strcmp(p->p_name, name) == 0)
+ while (!(ret=getprotoent_r(result_buf, buf, buflen, result))) {
+ if (strcmp(result_buf->p_name, name) == 0)
break;
- for (cp = p->p_aliases; *cp != 0; cp++)
+ for (cp = result_buf->p_aliases; *cp != 0; cp++)
if (strcmp(*cp, name) == 0)
goto found;
}
@@ -175,20 +209,40 @@ found:
if (!proto_stayopen)
endprotoent();
UNLOCK;
- return (p);
+ return *result?0:ret;
}
-struct protoent * getprotobynumber(int proto)
+
+struct protoent * getprotobyname(const char *name)
{
- register struct protoent *p;
+ struct protoent *result;
+ getprotobyname_r(name, &proto, static_aliases, sizeof(static_aliases), &result);
+ return result;
+}
+
+
+int getprotobynumber_r (int proto_num,
+ struct protoent *result_buf,
+ char *buf, size_t buflen,
+ struct protoent **result)
+{
+ int ret;
LOCK;
setprotoent(proto_stayopen);
- while ((p = getprotoent()) != NULL)
- if (p->p_proto == proto)
+ while (!(ret=getprotoent_r(result_buf, buf, buflen, result)))
+ if (result_buf->p_proto == proto_num)
break;
if (!proto_stayopen)
endprotoent();
UNLOCK;
- return (p);
+ return *result?0:ret;
}
+
+struct protoent * getprotobynumber(int proto_num)
+{
+ struct protoent *result;
+ getprotobynumber_r(proto_num, &proto, static_aliases, sizeof(static_aliases), &result);
+ return result;
+}
+